Add Unique Queue infrastructure and move TestPullRequests to this (#9856)
* Upgrade levelqueue to version 0.2.0 This adds functionality for Unique Queues * Add UniqueQueue interface and functions to create them * Add UniqueQueue implementations * Move TestPullRequests over to use UniqueQueue * Reduce code duplication * Add bytefifos * Ensure invalid types are logged * Fix close race in PersistableChannelQueue Shutdownmj
zeripath
4 years ago
committed by
GitHub
parent
b4914249ee
commit
2c903383b5
@ -0,0 +1,61 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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// ByteFIFO defines a FIFO that takes a byte array
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type ByteFIFO interface {
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// Len returns the length of the fifo
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Len() int64
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// PushFunc pushes data to the end of the fifo and calls the callback if it is added
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PushFunc(data []byte, fn func() error) error
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// Pop pops data from the start of the fifo
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Pop() ([]byte, error)
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// Close this fifo
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Close() error
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}
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// UniqueByteFIFO defines a FIFO that Uniques its contents
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type UniqueByteFIFO interface {
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ByteFIFO
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// Has returns whether the fifo contains this data
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Has(data []byte) (bool, error)
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}
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var _ (ByteFIFO) = &DummyByteFIFO{}
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// DummyByteFIFO represents a dummy fifo
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type DummyByteFIFO struct{}
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// PushFunc returns nil
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func (*DummyByteFIFO) PushFunc(data []byte, fn func() error) error {
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return nil
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}
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// Pop returns nil
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func (*DummyByteFIFO) Pop() ([]byte, error) {
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return []byte{}, nil
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}
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// Close returns nil
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func (*DummyByteFIFO) Close() error {
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return nil
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}
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// Len is always 0
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func (*DummyByteFIFO) Len() int64 {
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return 0
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}
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var _ (UniqueByteFIFO) = &DummyUniqueByteFIFO{}
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// DummyUniqueByteFIFO represents a dummy unique fifo
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type DummyUniqueByteFIFO struct {
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DummyByteFIFO
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}
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// Has always returns false
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func (*DummyUniqueByteFIFO) Has([]byte) (bool, error) {
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return false, nil
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}
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@ -0,0 +1,227 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"context"
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"encoding/json"
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"fmt"
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"sync"
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"time"
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"code.gitea.io/gitea/modules/log"
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)
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// ByteFIFOQueueConfiguration is the configuration for a ByteFIFOQueue
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type ByteFIFOQueueConfiguration struct {
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WorkerPoolConfiguration
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Workers int
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Name string
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}
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var _ (Queue) = &ByteFIFOQueue{}
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// ByteFIFOQueue is a Queue formed from a ByteFIFO and WorkerPool
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type ByteFIFOQueue struct {
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*WorkerPool
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byteFIFO ByteFIFO
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typ Type
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closed chan struct{}
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terminated chan struct{}
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exemplar interface{}
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workers int
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name string
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lock sync.Mutex
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}
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// NewByteFIFOQueue creates a new ByteFIFOQueue
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func NewByteFIFOQueue(typ Type, byteFIFO ByteFIFO, handle HandlerFunc, cfg, exemplar interface{}) (*ByteFIFOQueue, error) {
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configInterface, err := toConfig(ByteFIFOQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(ByteFIFOQueueConfiguration)
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return &ByteFIFOQueue{
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WorkerPool: NewWorkerPool(handle, config.WorkerPoolConfiguration),
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byteFIFO: byteFIFO,
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typ: typ,
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closed: make(chan struct{}),
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terminated: make(chan struct{}),
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exemplar: exemplar,
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workers: config.Workers,
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name: config.Name,
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}, nil
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}
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// Name returns the name of this queue
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func (q *ByteFIFOQueue) Name() string {
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return q.name
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}
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// Push pushes data to the fifo
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func (q *ByteFIFOQueue) Push(data Data) error {
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return q.PushFunc(data, nil)
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}
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// PushFunc pushes data to the fifo
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func (q *ByteFIFOQueue) PushFunc(data Data, fn func() error) error {
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if !assignableTo(data, q.exemplar) {
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return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in %s", data, q.exemplar, q.name)
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}
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bs, err := json.Marshal(data)
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if err != nil {
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return err
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}
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return q.byteFIFO.PushFunc(bs, fn)
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}
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// IsEmpty checks if the queue is empty
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func (q *ByteFIFOQueue) IsEmpty() bool {
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q.lock.Lock()
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defer q.lock.Unlock()
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if !q.WorkerPool.IsEmpty() {
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return false
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}
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return q.byteFIFO.Len() == 0
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}
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// Run runs the bytefifo queue
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func (q *ByteFIFOQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
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atShutdown(context.Background(), q.Shutdown)
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atTerminate(context.Background(), q.Terminate)
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log.Debug("%s: %s Starting", q.typ, q.name)
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go func() {
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_ = q.AddWorkers(q.workers, 0)
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}()
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go q.readToChan()
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log.Trace("%s: %s Waiting til closed", q.typ, q.name)
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<-q.closed
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log.Trace("%s: %s Waiting til done", q.typ, q.name)
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q.Wait()
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log.Trace("%s: %s Waiting til cleaned", q.typ, q.name)
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ctx, cancel := context.WithCancel(context.Background())
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atTerminate(ctx, cancel)
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q.CleanUp(ctx)
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cancel()
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}
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func (q *ByteFIFOQueue) readToChan() {
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for {
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select {
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case <-q.closed:
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// tell the pool to shutdown.
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q.cancel()
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return
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default:
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q.lock.Lock()
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bs, err := q.byteFIFO.Pop()
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if err != nil {
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q.lock.Unlock()
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log.Error("%s: %s Error on Pop: %v", q.typ, q.name, err)
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time.Sleep(time.Millisecond * 100)
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continue
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}
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if len(bs) == 0 {
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q.lock.Unlock()
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time.Sleep(time.Millisecond * 100)
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continue
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}
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data, err := unmarshalAs(bs, q.exemplar)
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if err != nil {
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log.Error("%s: %s Failed to unmarshal with error: %v", q.typ, q.name, err)
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q.lock.Unlock()
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time.Sleep(time.Millisecond * 100)
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continue
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}
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log.Trace("%s %s: Task found: %#v", q.typ, q.name, data)
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q.WorkerPool.Push(data)
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q.lock.Unlock()
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}
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}
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}
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// Shutdown processing from this queue
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func (q *ByteFIFOQueue) Shutdown() {
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log.Trace("%s: %s Shutting down", q.typ, q.name)
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q.lock.Lock()
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select {
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case <-q.closed:
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default:
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close(q.closed)
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}
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q.lock.Unlock()
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log.Debug("%s: %s Shutdown", q.typ, q.name)
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}
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// Terminate this queue and close the queue
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func (q *ByteFIFOQueue) Terminate() {
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log.Trace("%s: %s Terminating", q.typ, q.name)
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q.Shutdown()
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q.lock.Lock()
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select {
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case <-q.terminated:
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q.lock.Unlock()
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return
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default:
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}
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close(q.terminated)
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q.lock.Unlock()
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if log.IsDebug() {
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log.Debug("%s: %s Closing with %d tasks left in queue", q.typ, q.name, q.byteFIFO.Len())
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}
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if err := q.byteFIFO.Close(); err != nil {
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log.Error("Error whilst closing internal byte fifo in %s: %s: %v", q.typ, q.name, err)
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}
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log.Debug("%s: %s Terminated", q.typ, q.name)
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}
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var _ (UniqueQueue) = &ByteFIFOUniqueQueue{}
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// ByteFIFOUniqueQueue represents a UniqueQueue formed from a UniqueByteFifo
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type ByteFIFOUniqueQueue struct {
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ByteFIFOQueue
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}
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// NewByteFIFOUniqueQueue creates a new ByteFIFOUniqueQueue
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func NewByteFIFOUniqueQueue(typ Type, byteFIFO UniqueByteFIFO, handle HandlerFunc, cfg, exemplar interface{}) (*ByteFIFOUniqueQueue, error) {
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configInterface, err := toConfig(ByteFIFOQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(ByteFIFOQueueConfiguration)
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return &ByteFIFOUniqueQueue{
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ByteFIFOQueue: ByteFIFOQueue{
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WorkerPool: NewWorkerPool(handle, config.WorkerPoolConfiguration),
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byteFIFO: byteFIFO,
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typ: typ,
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closed: make(chan struct{}),
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terminated: make(chan struct{}),
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exemplar: exemplar,
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workers: config.Workers,
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name: config.Name,
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},
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}, nil
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}
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// Has checks if the provided data is in the queue
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func (q *ByteFIFOUniqueQueue) Has(data Data) (bool, error) {
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if !assignableTo(data, q.exemplar) {
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return false, fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in %s", data, q.exemplar, q.name)
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}
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bs, err := json.Marshal(data)
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if err != nil {
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return false, err
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}
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return q.byteFIFO.(UniqueByteFIFO).Has(bs)
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}
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@ -0,0 +1,29 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"fmt"
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)
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// UniqueQueue defines a queue which guarantees only one instance of same
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// data is in the queue. Instances with same identity will be
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// discarded if there is already one in the line.
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//
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// This queue is particularly useful for preventing duplicated task
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// of same purpose - please note that this does not guarantee that a particular
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// task cannot be processed twice or more at the same time. Uniqueness is
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// only guaranteed whilst the task is waiting in the queue.
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//
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// Users of this queue should be careful to push only the identifier of the
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// data
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type UniqueQueue interface {
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Queue
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PushFunc(Data, func() error) error
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Has(Data) (bool, error)
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}
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// ErrAlreadyInQueue is returned when trying to push data to the queue that is already in the queue
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var ErrAlreadyInQueue = fmt.Errorf("already in queue")
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@ -0,0 +1,132 @@
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// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package queue
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import (
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"context"
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"fmt"
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"sync"
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"code.gitea.io/gitea/modules/log"
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)
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// ChannelUniqueQueueType is the type for channel queue
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const ChannelUniqueQueueType Type = "unique-channel"
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// ChannelUniqueQueueConfiguration is the configuration for a ChannelUniqueQueue
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type ChannelUniqueQueueConfiguration ChannelQueueConfiguration
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// ChannelUniqueQueue implements UniqueQueue
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//
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// It is basically a thin wrapper around a WorkerPool but keeps a store of
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// what has been pushed within a table.
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//
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// Please note that this Queue does not guarantee that a particular
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// task cannot be processed twice or more at the same time. Uniqueness is
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// only guaranteed whilst the task is waiting in the queue.
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type ChannelUniqueQueue struct {
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*WorkerPool
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lock sync.Mutex
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table map[Data]bool
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exemplar interface{}
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workers int
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name string
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}
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// NewChannelUniqueQueue create a memory channel queue
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func NewChannelUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(ChannelUniqueQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(ChannelUniqueQueueConfiguration)
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if config.BatchLength == 0 {
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config.BatchLength = 1
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}
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queue := &ChannelUniqueQueue{
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table: map[Data]bool{},
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exemplar: exemplar,
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workers: config.Workers,
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name: config.Name,
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}
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queue.WorkerPool = NewWorkerPool(func(data ...Data) {
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for _, datum := range data {
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queue.lock.Lock()
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delete(queue.table, datum)
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queue.lock.Unlock()
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handle(datum)
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}
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}, config.WorkerPoolConfiguration)
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queue.qid = GetManager().Add(queue, ChannelUniqueQueueType, config, exemplar)
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return queue, nil
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}
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// Run starts to run the queue
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func (q *ChannelUniqueQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
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atShutdown(context.Background(), func() {
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log.Warn("ChannelUniqueQueue: %s is not shutdownable!", q.name)
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})
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atTerminate(context.Background(), func() {
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log.Warn("ChannelUniqueQueue: %s is not terminatable!", q.name)
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})
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log.Debug("ChannelUniqueQueue: %s Starting", q.name)
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go func() {
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_ = q.AddWorkers(q.workers, 0)
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}()
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}
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// Push will push data into the queue if the data is not already in the queue
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func (q *ChannelUniqueQueue) Push(data Data) error {
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return q.PushFunc(data, nil)
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}
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// PushFunc will push data into the queue
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func (q *ChannelUniqueQueue) PushFunc(data Data, fn func() error) error {
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if !assignableTo(data, q.exemplar) {
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return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in queue: %s", data, q.exemplar, q.name)
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}
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q.lock.Lock()
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locked := true
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defer func() {
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if locked {
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q.lock.Unlock()
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}
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}()
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if _, ok := q.table[data]; ok {
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return ErrAlreadyInQueue
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}
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// FIXME: We probably need to implement some sort of limit here
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// If the downstream queue blocks this table will grow without limit
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q.table[data] = true
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if fn != nil {
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err := fn()
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if err != nil {
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delete(q.table, data)
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return err
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}
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}
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locked = false
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q.lock.Unlock()
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q.WorkerPool.Push(data)
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return nil
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}
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// Has checks if the data is in the queue
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func (q *ChannelUniqueQueue) Has(data Data) (bool, error) {
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q.lock.Lock()
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defer q.lock.Unlock()
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_, has := q.table[data]
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return has, nil
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}
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// Name returns the name of this queue
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func (q *ChannelUniqueQueue) Name() string {
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return q.name
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}
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func init() {
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queuesMap[ChannelUniqueQueueType] = NewChannelUniqueQueue
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}
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@ -0,0 +1,104 @@
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
|
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// license that can be found in the LICENSE file.
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|
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package queue
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import (
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"gitea.com/lunny/levelqueue"
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)
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// LevelUniqueQueueType is the type for level queue
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const LevelUniqueQueueType Type = "unique-level"
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// LevelUniqueQueueConfiguration is the configuration for a LevelUniqueQueue
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type LevelUniqueQueueConfiguration struct {
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ByteFIFOQueueConfiguration
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DataDir string
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}
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// LevelUniqueQueue implements a disk library queue
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type LevelUniqueQueue struct {
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*ByteFIFOUniqueQueue
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}
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// NewLevelUniqueQueue creates a ledis local queue
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//
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// Please note that this Queue does not guarantee that a particular
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// task cannot be processed twice or more at the same time. Uniqueness is
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// only guaranteed whilst the task is waiting in the queue.
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func NewLevelUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
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configInterface, err := toConfig(LevelUniqueQueueConfiguration{}, cfg)
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if err != nil {
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return nil, err
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}
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config := configInterface.(LevelUniqueQueueConfiguration)
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byteFIFO, err := NewLevelUniqueQueueByteFIFO(config.DataDir)
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if err != nil {
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return nil, err
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}
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byteFIFOQueue, err := NewByteFIFOUniqueQueue(LevelUniqueQueueType, byteFIFO, handle, config.ByteFIFOQueueConfiguration, exemplar)
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if err != nil {
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return nil, err
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}
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queue := &LevelUniqueQueue{
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ByteFIFOUniqueQueue: byteFIFOQueue,
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}
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queue.qid = GetManager().Add(queue, LevelUniqueQueueType, config, exemplar)
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return queue, nil
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}
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var _ (UniqueByteFIFO) = &LevelUniqueQueueByteFIFO{}
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|
||||
// LevelUniqueQueueByteFIFO represents a ByteFIFO formed from a LevelUniqueQueue
|
||||
type LevelUniqueQueueByteFIFO struct {
|
||||
internal *levelqueue.UniqueQueue
|
||||
}
|
||||
|
||||
// NewLevelUniqueQueueByteFIFO creates a new ByteFIFO formed from a LevelUniqueQueue
|
||||
func NewLevelUniqueQueueByteFIFO(dataDir string) (*LevelUniqueQueueByteFIFO, error) {
|
||||
internal, err := levelqueue.OpenUnique(dataDir)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return &LevelUniqueQueueByteFIFO{
|
||||
internal: internal,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// PushFunc pushes data to the end of the fifo and calls the callback if it is added
|
||||
func (fifo *LevelUniqueQueueByteFIFO) PushFunc(data []byte, fn func() error) error {
|
||||
return fifo.internal.LPushFunc(data, fn)
|
||||
}
|
||||
|
||||
// Pop pops data from the start of the fifo
|
||||
func (fifo *LevelUniqueQueueByteFIFO) Pop() ([]byte, error) {
|
||||
data, err := fifo.internal.RPop()
|
||||
if err != nil && err != levelqueue.ErrNotFound {
|
||||
return nil, err
|
||||
}
|
||||
return data, nil
|
||||
}
|
||||
|
||||
// Len returns the length of the fifo
|
||||
func (fifo *LevelUniqueQueueByteFIFO) Len() int64 {
|
||||
return fifo.internal.Len()
|
||||
}
|
||||
|
||||
// Has returns whether the fifo contains this data
|
||||
func (fifo *LevelUniqueQueueByteFIFO) Has(data []byte) (bool, error) {
|
||||
return fifo.internal.Has(data)
|
||||
}
|
||||
|
||||
// Close this fifo
|
||||
func (fifo *LevelUniqueQueueByteFIFO) Close() error {
|
||||
return fifo.internal.Close()
|
||||
}
|
||||
|
||||
func init() {
|
||||
queuesMap[LevelUniqueQueueType] = NewLevelUniqueQueue
|
||||
}
|
||||
@ -0,0 +1,241 @@
|
||||
// Copyright 2020 The Gitea Authors. All rights reserved.
|
||||
// Use of this source code is governed by a MIT-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package queue
|
||||
|
||||
import (
|
||||
"context"
|
||||
"sync"
|
||||
"time"
|
||||
|
||||
"code.gitea.io/gitea/modules/log"
|
||||
)
|
||||
|
||||
// PersistableChannelUniqueQueueType is the type for persistable queue
|
||||
const PersistableChannelUniqueQueueType Type = "unique-persistable-channel"
|
||||
|
||||
// PersistableChannelUniqueQueueConfiguration is the configuration for a PersistableChannelUniqueQueue
|
||||
type PersistableChannelUniqueQueueConfiguration struct {
|
||||
Name string
|
||||
DataDir string
|
||||
BatchLength int
|
||||
QueueLength int
|
||||
Timeout time.Duration
|
||||
MaxAttempts int
|
||||
Workers int
|
||||
MaxWorkers int
|
||||
BlockTimeout time.Duration
|
||||
BoostTimeout time.Duration
|
||||
BoostWorkers int
|
||||
}
|
||||
|
||||
// PersistableChannelUniqueQueue wraps a channel queue and level queue together
|
||||
//
|
||||
// Please note that this Queue does not guarantee that a particular
|
||||
// task cannot be processed twice or more at the same time. Uniqueness is
|
||||
// only guaranteed whilst the task is waiting in the queue.
|
||||
type PersistableChannelUniqueQueue struct {
|
||||
*ChannelUniqueQueue
|
||||
delayedStarter
|
||||
lock sync.Mutex
|
||||
closed chan struct{}
|
||||
}
|
||||
|
||||
// NewPersistableChannelUniqueQueue creates a wrapped batched channel queue with persistable level queue backend when shutting down
|
||||
// This differs from a wrapped queue in that the persistent queue is only used to persist at shutdown/terminate
|
||||
func NewPersistableChannelUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
|
||||
configInterface, err := toConfig(PersistableChannelUniqueQueueConfiguration{}, cfg)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
config := configInterface.(PersistableChannelUniqueQueueConfiguration)
|
||||
|
||||
channelUniqueQueue, err := NewChannelUniqueQueue(handle, ChannelUniqueQueueConfiguration{
|
||||
WorkerPoolConfiguration: WorkerPoolConfiguration{
|
||||
QueueLength: config.QueueLength,
|
||||
BatchLength: config.BatchLength,
|
||||
BlockTimeout: config.BlockTimeout,
|
||||
BoostTimeout: config.BoostTimeout,
|
||||
BoostWorkers: config.BoostWorkers,
|
||||
MaxWorkers: config.MaxWorkers,
|
||||
},
|
||||
Workers: config.Workers,
|
||||
Name: config.Name + "-channel",
|
||||
}, exemplar)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// the level backend only needs temporary workers to catch up with the previously dropped work
|
||||
levelCfg := LevelUniqueQueueConfiguration{
|
||||
ByteFIFOQueueConfiguration: ByteFIFOQueueConfiguration{
|
||||
WorkerPoolConfiguration: WorkerPoolConfiguration{
|
||||
QueueLength: config.QueueLength,
|
||||
BatchLength: config.BatchLength,
|
||||
BlockTimeout: 0,
|
||||
BoostTimeout: 0,
|
||||
BoostWorkers: 0,
|
||||
MaxWorkers: 1,
|
||||
},
|
||||
Workers: 1,
|
||||
Name: config.Name + "-level",
|
||||
},
|
||||
DataDir: config.DataDir,
|
||||
}
|
||||
|
||||
queue := &PersistableChannelUniqueQueue{
|
||||
ChannelUniqueQueue: channelUniqueQueue.(*ChannelUniqueQueue),
|
||||
closed: make(chan struct{}),
|
||||
}
|
||||
|
||||
levelQueue, err := NewLevelUniqueQueue(func(data ...Data) {
|
||||
for _, datum := range data {
|
||||
err := queue.Push(datum)
|
||||
if err != nil && err != ErrAlreadyInQueue {
|
||||
log.Error("Unable push to channelled queue: %v", err)
|
||||
}
|
||||
}
|
||||
}, levelCfg, exemplar)
|
||||
if err == nil {
|
||||
queue.delayedStarter = delayedStarter{
|
||||
internal: levelQueue.(*LevelUniqueQueue),
|
||||
name: config.Name,
|
||||
}
|
||||
|
||||
_ = GetManager().Add(queue, PersistableChannelUniqueQueueType, config, exemplar)
|
||||
return queue, nil
|
||||
}
|
||||
if IsErrInvalidConfiguration(err) {
|
||||
// Retrying ain't gonna make this any better...
|
||||
return nil, ErrInvalidConfiguration{cfg: cfg}
|
||||
}
|
||||
|
||||
queue.delayedStarter = delayedStarter{
|
||||
cfg: levelCfg,
|
||||
underlying: LevelUniqueQueueType,
|
||||
timeout: config.Timeout,
|
||||
maxAttempts: config.MaxAttempts,
|
||||
name: config.Name,
|
||||
}
|
||||
_ = GetManager().Add(queue, PersistableChannelUniqueQueueType, config, exemplar)
|
||||
return queue, nil
|
||||
}
|
||||
|
||||
// Name returns the name of this queue
|
||||
func (q *PersistableChannelUniqueQueue) Name() string {
|
||||
return q.delayedStarter.name
|
||||
}
|
||||
|
||||
// Push will push the indexer data to queue
|
||||
func (q *PersistableChannelUniqueQueue) Push(data Data) error {
|
||||
return q.PushFunc(data, nil)
|
||||
}
|
||||
|
||||
// PushFunc will push the indexer data to queue
|
||||
func (q *PersistableChannelUniqueQueue) PushFunc(data Data, fn func() error) error {
|
||||
select {
|
||||
case <-q.closed:
|
||||
return q.internal.(UniqueQueue).PushFunc(data, fn)
|
||||
default:
|
||||
return q.ChannelUniqueQueue.PushFunc(data, fn)
|
||||
}
|
||||
}
|
||||
|
||||
// Has will test if the queue has the data
|
||||
func (q *PersistableChannelUniqueQueue) Has(data Data) (bool, error) {
|
||||
// This is more difficult...
|
||||
has, err := q.ChannelUniqueQueue.Has(data)
|
||||
if err != nil || has {
|
||||
return has, err
|
||||
}
|
||||
return q.internal.(UniqueQueue).Has(data)
|
||||
}
|
||||
|
||||
// Run starts to run the queue
|
||||
func (q *PersistableChannelUniqueQueue) Run(atShutdown, atTerminate func(context.Context, func())) {
|
||||
log.Debug("PersistableChannelUniqueQueue: %s Starting", q.delayedStarter.name)
|
||||
|
||||
q.lock.Lock()
|
||||
if q.internal == nil {
|
||||
err := q.setInternal(atShutdown, func(data ...Data) {
|
||||
for _, datum := range data {
|
||||
err := q.Push(datum)
|
||||
if err != nil && err != ErrAlreadyInQueue {
|
||||
log.Error("Unable push to channelled queue: %v", err)
|
||||
}
|
||||
}
|
||||
}, q.exemplar)
|
||||
q.lock.Unlock()
|
||||
if err != nil {
|
||||
log.Fatal("Unable to create internal queue for %s Error: %v", q.Name(), err)
|
||||
return
|
||||
}
|
||||
} else {
|
||||
q.lock.Unlock()
|
||||
}
|
||||
atShutdown(context.Background(), q.Shutdown)
|
||||
atTerminate(context.Background(), q.Terminate)
|
||||
|
||||
// Just run the level queue - we shut it down later
|
||||
go q.internal.Run(func(_ context.Context, _ func()) {}, func(_ context.Context, _ func()) {})
|
||||
|
||||
go func() {
|
||||
_ = q.ChannelUniqueQueue.AddWorkers(q.workers, 0)
|
||||
}()
|
||||
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Waiting til closed", q.delayedStarter.name)
|
||||
<-q.closed
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Cancelling pools", q.delayedStarter.name)
|
||||
q.internal.(*LevelUniqueQueue).cancel()
|
||||
q.ChannelUniqueQueue.cancel()
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Waiting til done", q.delayedStarter.name)
|
||||
q.ChannelUniqueQueue.Wait()
|
||||
q.internal.(*LevelUniqueQueue).Wait()
|
||||
// Redirect all remaining data in the chan to the internal channel
|
||||
go func() {
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Redirecting remaining data", q.delayedStarter.name)
|
||||
for data := range q.ChannelUniqueQueue.dataChan {
|
||||
_ = q.internal.Push(data)
|
||||
}
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Done Redirecting remaining data", q.delayedStarter.name)
|
||||
}()
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Done main loop", q.delayedStarter.name)
|
||||
}
|
||||
|
||||
// Flush flushes the queue
|
||||
func (q *PersistableChannelUniqueQueue) Flush(timeout time.Duration) error {
|
||||
return q.ChannelUniqueQueue.Flush(timeout)
|
||||
}
|
||||
|
||||
// Shutdown processing this queue
|
||||
func (q *PersistableChannelUniqueQueue) Shutdown() {
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Shutting down", q.delayedStarter.name)
|
||||
q.lock.Lock()
|
||||
defer q.lock.Unlock()
|
||||
select {
|
||||
case <-q.closed:
|
||||
default:
|
||||
if q.internal != nil {
|
||||
q.internal.(*LevelUniqueQueue).Shutdown()
|
||||
}
|
||||
close(q.closed)
|
||||
}
|
||||
log.Debug("PersistableChannelUniqueQueue: %s Shutdown", q.delayedStarter.name)
|
||||
}
|
||||
|
||||
// Terminate this queue and close the queue
|
||||
func (q *PersistableChannelUniqueQueue) Terminate() {
|
||||
log.Trace("PersistableChannelUniqueQueue: %s Terminating", q.delayedStarter.name)
|
||||
q.Shutdown()
|
||||
q.lock.Lock()
|
||||
defer q.lock.Unlock()
|
||||
if q.internal != nil {
|
||||
q.internal.(*LevelUniqueQueue).Terminate()
|
||||
}
|
||||
log.Debug("PersistableChannelUniqueQueue: %s Terminated", q.delayedStarter.name)
|
||||
}
|
||||
|
||||
func init() {
|
||||
queuesMap[PersistableChannelUniqueQueueType] = NewPersistableChannelUniqueQueue
|
||||
}
|
||||
@ -0,0 +1,124 @@
|
||||
// Copyright 2019 The Gitea Authors. All rights reserved.
|
||||
// Use of this source code is governed by a MIT-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package queue
|
||||
|
||||
// RedisUniqueQueueType is the type for redis queue
|
||||
const RedisUniqueQueueType Type = "unique-redis"
|
||||
|
||||
// RedisUniqueQueue redis queue
|
||||
type RedisUniqueQueue struct {
|
||||
*ByteFIFOUniqueQueue
|
||||
}
|
||||
|
||||
// RedisUniqueQueueConfiguration is the configuration for the redis queue
|
||||
type RedisUniqueQueueConfiguration struct {
|
||||
ByteFIFOQueueConfiguration
|
||||
RedisUniqueByteFIFOConfiguration
|
||||
}
|
||||
|
||||
// NewRedisUniqueQueue creates single redis or cluster redis queue.
|
||||
//
|
||||
// Please note that this Queue does not guarantee that a particular
|
||||
// task cannot be processed twice or more at the same time. Uniqueness is
|
||||
// only guaranteed whilst the task is waiting in the queue.
|
||||
func NewRedisUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
|
||||
configInterface, err := toConfig(RedisUniqueQueueConfiguration{}, cfg)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
config := configInterface.(RedisUniqueQueueConfiguration)
|
||||
|
||||
byteFIFO, err := NewRedisUniqueByteFIFO(config.RedisUniqueByteFIFOConfiguration)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if len(byteFIFO.setName) == 0 {
|
||||
byteFIFO.setName = byteFIFO.queueName + "_unique"
|
||||
}
|
||||
|
||||
byteFIFOQueue, err := NewByteFIFOUniqueQueue(RedisUniqueQueueType, byteFIFO, handle, config.ByteFIFOQueueConfiguration, exemplar)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
queue := &RedisUniqueQueue{
|
||||
ByteFIFOUniqueQueue: byteFIFOQueue,
|
||||
}
|
||||
|
||||
queue.qid = GetManager().Add(queue, RedisUniqueQueueType, config, exemplar)
|
||||
|
||||
return queue, nil
|
||||
}
|
||||
|
||||
var _ (UniqueByteFIFO) = &RedisUniqueByteFIFO{}
|
||||
|
||||
// RedisUniqueByteFIFO represents a UniqueByteFIFO formed from a redisClient
|
||||
type RedisUniqueByteFIFO struct {
|
||||
RedisByteFIFO
|
||||
setName string
|
||||
}
|
||||
|
||||
// RedisUniqueByteFIFOConfiguration is the configuration for the RedisUniqueByteFIFO
|
||||
type RedisUniqueByteFIFOConfiguration struct {
|
||||
RedisByteFIFOConfiguration
|
||||
SetName string
|
||||
}
|
||||
|
||||
// NewRedisUniqueByteFIFO creates a UniqueByteFIFO formed from a redisClient
|
||||
func NewRedisUniqueByteFIFO(config RedisUniqueByteFIFOConfiguration) (*RedisUniqueByteFIFO, error) {
|
||||
internal, err := NewRedisByteFIFO(config.RedisByteFIFOConfiguration)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
fifo := &RedisUniqueByteFIFO{
|
||||
RedisByteFIFO: *internal,
|
||||
setName: config.SetName,
|
||||
}
|
||||
|
||||
return fifo, nil
|
||||
}
|
||||
|
||||
// PushFunc pushes data to the end of the fifo and calls the callback if it is added
|
||||
func (fifo *RedisUniqueByteFIFO) PushFunc(data []byte, fn func() error) error {
|
||||
added, err := fifo.client.SAdd(fifo.setName, data).Result()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if added == 0 {
|
||||
return ErrAlreadyInQueue
|
||||
}
|
||||
if fn != nil {
|
||||
if err := fn(); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return fifo.client.RPush(fifo.queueName, data).Err()
|
||||
}
|
||||
|
||||
// Pop pops data from the start of the fifo
|
||||
func (fifo *RedisUniqueByteFIFO) Pop() ([]byte, error) {
|
||||
data, err := fifo.client.LPop(fifo.queueName).Bytes()
|
||||
if err != nil {
|
||||
return data, err
|
||||
}
|
||||
|
||||
if len(data) == 0 {
|
||||
return data, nil
|
||||
}
|
||||
|
||||
err = fifo.client.SRem(fifo.setName, data).Err()
|
||||
return data, err
|
||||
}
|
||||
|
||||
// Has returns whether the fifo contains this data
|
||||
func (fifo *RedisUniqueByteFIFO) Has(data []byte) (bool, error) {
|
||||
return fifo.client.SIsMember(fifo.setName, data).Result()
|
||||
}
|
||||
|
||||
func init() {
|
||||
queuesMap[RedisUniqueQueueType] = NewRedisUniqueQueue
|
||||
}
|
||||
@ -0,0 +1,172 @@
|
||||
// Copyright 2020 The Gitea Authors. All rights reserved.
|
||||
// Use of this source code is governed by a MIT-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package queue
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"sync"
|
||||
"time"
|
||||
)
|
||||
|
||||
// WrappedUniqueQueueType is the type for a wrapped delayed starting queue
|
||||
const WrappedUniqueQueueType Type = "unique-wrapped"
|
||||
|
||||
// WrappedUniqueQueueConfiguration is the configuration for a WrappedUniqueQueue
|
||||
type WrappedUniqueQueueConfiguration struct {
|
||||
Underlying Type
|
||||
Timeout time.Duration
|
||||
MaxAttempts int
|
||||
Config interface{}
|
||||
QueueLength int
|
||||
Name string
|
||||
}
|
||||
|
||||
// WrappedUniqueQueue wraps a delayed starting unique queue
|
||||
type WrappedUniqueQueue struct {
|
||||
*WrappedQueue
|
||||
table map[Data]bool
|
||||
tlock sync.Mutex
|
||||
ready bool
|
||||
}
|
||||
|
||||
// NewWrappedUniqueQueue will attempt to create a unique queue of the provided type,
|
||||
// but if there is a problem creating this queue it will instead create
|
||||
// a WrappedUniqueQueue with delayed startup of the queue instead and a
|
||||
// channel which will be redirected to the queue
|
||||
//
|
||||
// Please note that this Queue does not guarantee that a particular
|
||||
// task cannot be processed twice or more at the same time. Uniqueness is
|
||||
// only guaranteed whilst the task is waiting in the queue.
|
||||
func NewWrappedUniqueQueue(handle HandlerFunc, cfg, exemplar interface{}) (Queue, error) {
|
||||
configInterface, err := toConfig(WrappedUniqueQueueConfiguration{}, cfg)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
config := configInterface.(WrappedUniqueQueueConfiguration)
|
||||
|
||||
queue, err := NewQueue(config.Underlying, handle, config.Config, exemplar)
|
||||
if err == nil {
|
||||
// Just return the queue there is no need to wrap
|
||||
return queue, nil
|
||||
}
|
||||
if IsErrInvalidConfiguration(err) {
|
||||
// Retrying ain't gonna make this any better...
|
||||
return nil, ErrInvalidConfiguration{cfg: cfg}
|
||||
}
|
||||
|
||||
wrapped := &WrappedUniqueQueue{
|
||||
WrappedQueue: &WrappedQueue{
|
||||
channel: make(chan Data, config.QueueLength),
|
||||
exemplar: exemplar,
|
||||
delayedStarter: delayedStarter{
|
||||
cfg: config.Config,
|
||||
underlying: config.Underlying,
|
||||
timeout: config.Timeout,
|
||||
maxAttempts: config.MaxAttempts,
|
||||
name: config.Name,
|
||||
},
|
||||
},
|
||||
table: map[Data]bool{},
|
||||
}
|
||||
|
||||
// wrapped.handle is passed to the delayedStarting internal queue and is run to handle
|
||||
// data passed to
|
||||
wrapped.handle = func(data ...Data) {
|
||||
for _, datum := range data {
|
||||
wrapped.tlock.Lock()
|
||||
if !wrapped.ready {
|
||||
delete(wrapped.table, data)
|
||||
// If our table is empty all of the requests we have buffered between the
|
||||
// wrapper queue starting and the internal queue starting have been handled.
|
||||
// We can stop buffering requests in our local table and just pass Push
|
||||
// direct to the internal queue
|
||||
if len(wrapped.table) == 0 {
|
||||
wrapped.ready = true
|
||||
}
|
||||
}
|
||||
wrapped.tlock.Unlock()
|
||||
handle(datum)
|
||||
}
|
||||
}
|
||||
_ = GetManager().Add(queue, WrappedUniqueQueueType, config, exemplar)
|
||||
return wrapped, nil
|
||||
}
|
||||
|
||||
// Push will push the data to the internal channel checking it against the exemplar
|
||||
func (q *WrappedUniqueQueue) Push(data Data) error {
|
||||
return q.PushFunc(data, nil)
|
||||
}
|
||||
|
||||
// PushFunc will push the data to the internal channel checking it against the exemplar
|
||||
func (q *WrappedUniqueQueue) PushFunc(data Data, fn func() error) error {
|
||||
if !assignableTo(data, q.exemplar) {
|
||||
return fmt.Errorf("Unable to assign data: %v to same type as exemplar: %v in %s", data, q.exemplar, q.name)
|
||||
}
|
||||
|
||||
q.tlock.Lock()
|
||||
if q.ready {
|
||||
// ready means our table is empty and all of the requests we have buffered between the
|
||||
// wrapper queue starting and the internal queue starting have been handled.
|
||||
// We can stop buffering requests in our local table and just pass Push
|
||||
// direct to the internal queue
|
||||
q.tlock.Unlock()
|
||||
return q.internal.(UniqueQueue).PushFunc(data, fn)
|
||||
}
|
||||
|
||||
locked := true
|
||||
defer func() {
|
||||
if locked {
|
||||
q.tlock.Unlock()
|
||||
}
|
||||
}()
|
||||
if _, ok := q.table[data]; ok {
|
||||
return ErrAlreadyInQueue
|
||||
}
|
||||
// FIXME: We probably need to implement some sort of limit here
|
||||
// If the downstream queue blocks this table will grow without limit
|
||||
q.table[data] = true
|
||||
if fn != nil {
|
||||
err := fn()
|
||||
if err != nil {
|
||||
delete(q.table, data)
|
||||
return err
|
||||
}
|
||||
}
|
||||
locked = false
|
||||
q.tlock.Unlock()
|
||||
|
||||
q.channel <- data
|
||||
return nil
|
||||
}
|
||||
|
||||
// Has checks if the data is in the queue
|
||||
func (q *WrappedUniqueQueue) Has(data Data) (bool, error) {
|
||||
q.tlock.Lock()
|
||||
defer q.tlock.Unlock()
|
||||
if q.ready {
|
||||
return q.internal.(UniqueQueue).Has(data)
|
||||
}
|
||||
_, has := q.table[data]
|
||||
return has, nil
|
||||
}
|
||||
|
||||
// IsEmpty checks whether the queue is empty
|
||||
func (q *WrappedUniqueQueue) IsEmpty() bool {
|
||||
q.tlock.Lock()
|
||||
if len(q.table) > 0 {
|
||||
q.tlock.Unlock()
|
||||
return false
|
||||
}
|
||||
if q.ready {
|
||||
q.tlock.Unlock()
|
||||
return q.internal.IsEmpty()
|
||||
}
|
||||
q.tlock.Unlock()
|
||||
return false
|
||||
}
|
||||
|
||||
func init() {
|
||||
queuesMap[WrappedUniqueQueueType] = NewWrappedUniqueQueue
|
||||
}
|
||||
@ -1,3 +1,7 @@
|
||||
queue/
|
||||
queue_pop/
|
||||
queue_push/
|
||||
uniquequeue/
|
||||
uniquequeue_pop/
|
||||
uniquequeue_push/
|
||||
set/
|
||||
|
||||
@ -0,0 +1,110 @@
|
||||
// Copyright 2020 Andrew Thornton. All rights reserved.
|
||||
// Use of this source code is governed by a MIT-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package levelqueue
|
||||
|
||||
import (
|
||||
"sync"
|
||||
|
||||
"github.com/syndtr/goleveldb/leveldb"
|
||||
"github.com/syndtr/goleveldb/leveldb/util"
|
||||
)
|
||||
|
||||
const (
|
||||
setPrefixStr = "set"
|
||||
)
|
||||
|
||||
// Set defines a set struct
|
||||
type Set struct {
|
||||
db *leveldb.DB
|
||||
closeUnderlyingDB bool
|
||||
lock sync.Mutex
|
||||
prefix []byte
|
||||
}
|
||||
|
||||
// OpenSet opens a set from the db path or creates a set if it doesn't exist.
|
||||
// The keys will be prefixed with "set-" by default
|
||||
func OpenSet(dataDir string) (*Set, error) {
|
||||
db, err := leveldb.OpenFile(dataDir, nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return NewSet(db, []byte(setPrefixStr), true)
|
||||
}
|
||||
|
||||
// NewSet creates a set from a db. The keys will be prefixed with prefix
|
||||
// and at close the db will be closed as per closeUnderlyingDB
|
||||
func NewSet(db *leveldb.DB, prefix []byte, closeUnderlyingDB bool) (*Set, error) {
|
||||
set := &Set{
|
||||
db: db,
|
||||
closeUnderlyingDB: closeUnderlyingDB,
|
||||
}
|
||||
set.prefix = make([]byte, len(prefix))
|
||||
copy(set.prefix, prefix)
|
||||
|
||||
return set, nil
|
||||
}
|
||||
|
||||
// Add adds a member string to a key set, returns true if the member was not already present
|
||||
func (set *Set) Add(value []byte) (bool, error) {
|
||||
set.lock.Lock()
|
||||
defer set.lock.Unlock()
|
||||
setKey := withPrefix(set.prefix, value)
|
||||
has, err := set.db.Has(setKey, nil)
|
||||
if err != nil || has {
|
||||
return !has, err
|
||||
}
|
||||
return !has, set.db.Put(setKey, []byte(""), nil)
|
||||
}
|
||||
|
||||
// Members returns the current members of the set
|
||||
func (set *Set) Members() ([][]byte, error) {
|
||||
set.lock.Lock()
|
||||
defer set.lock.Unlock()
|
||||
var members [][]byte
|
||||
prefix := withPrefix(set.prefix, []byte{})
|
||||
iter := set.db.NewIterator(util.BytesPrefix(prefix), nil)
|
||||
for iter.Next() {
|
||||
slice := iter.Key()[len(prefix):]
|
||||
value := make([]byte, len(slice))
|
||||
copy(value, slice)
|
||||
members = append(members, value)
|
||||
}
|
||||
iter.Release()
|
||||
return members, iter.Error()
|
||||
}
|
||||
|
||||
// Has returns if the member is in the set
|
||||
func (set *Set) Has(value []byte) (bool, error) {
|
||||
set.lock.Lock()
|
||||
defer set.lock.Unlock()
|
||||
setKey := withPrefix(set.prefix, value)
|
||||
|
||||
return set.db.Has(setKey, nil)
|
||||
}
|
||||
|
||||
// Remove removes a member from the set, returns true if the member was present
|
||||
func (set *Set) Remove(value []byte) (bool, error) {
|
||||
set.lock.Lock()
|
||||
defer set.lock.Unlock()
|
||||
setKey := withPrefix(set.prefix, value)
|
||||
|
||||
has, err := set.db.Has(setKey, nil)
|
||||
if err != nil || !has {
|
||||
return has, err
|
||||
}
|
||||
|
||||
return has, set.db.Delete(setKey, nil)
|
||||
}
|
||||
|
||||
// Close closes the set (and the underlying db if set to closeUnderlyingDB)
|
||||
func (set *Set) Close() error {
|
||||
if !set.closeUnderlyingDB {
|
||||
set.db = nil
|
||||
return nil
|
||||
}
|
||||
err := set.db.Close()
|
||||
set.db = nil
|
||||
return err
|
||||
}
|
||||
@ -0,0 +1,184 @@
|
||||
// Copyright 2020 Andrew Thornton. All rights reserved.
|
||||
// Use of this source code is governed by a MIT-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package levelqueue
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
|
||||
"github.com/syndtr/goleveldb/leveldb"
|
||||
)
|
||||
|
||||
const (
|
||||
uniqueQueuePrefixStr = "unique"
|
||||
)
|
||||
|
||||
// UniqueQueue defines an unique queue struct
|
||||
type UniqueQueue struct {
|
||||
q *Queue
|
||||
set *Set
|
||||
db *leveldb.DB
|
||||
closeUnderlyingDB bool
|
||||
}
|
||||
|
||||
// OpenUnique opens an unique queue from the db path or creates a set if it doesn't exist.
|
||||
// The keys in the queue portion will not be prefixed, and the set keys will be prefixed with "set-"
|
||||
func OpenUnique(dataDir string) (*UniqueQueue, error) {
|
||||
db, err := leveldb.OpenFile(dataDir, nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return NewUniqueQueue(db, []byte{}, []byte(uniqueQueuePrefixStr), true)
|
||||
}
|
||||
|
||||
// NewUniqueQueue creates a new unique queue from a db.
|
||||
// The queue keys will be prefixed with queuePrefix and the set keys with setPrefix
|
||||
// and at close the db will be closed as per closeUnderlyingDB
|
||||
func NewUniqueQueue(db *leveldb.DB, queuePrefix []byte, setPrefix []byte, closeUnderlyingDB bool) (*UniqueQueue, error) {
|
||||
internal, err := NewQueue(db, queuePrefix, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
set, err := NewSet(db, setPrefix, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
queue := &UniqueQueue{
|
||||
q: internal,
|
||||
set: set,
|
||||
db: db,
|
||||
closeUnderlyingDB: closeUnderlyingDB,
|
||||
}
|
||||
|
||||
return queue, err
|
||||
}
|
||||
|
||||
// LPush pushes data to the left of the queue
|
||||
func (queue *UniqueQueue) LPush(data []byte) error {
|
||||
return queue.LPushFunc(data, nil)
|
||||
}
|
||||
|
||||
// LPushFunc pushes data to the left of the queue and calls the callback if it is added
|
||||
func (queue *UniqueQueue) LPushFunc(data []byte, fn func() error) error {
|
||||
added, err := queue.set.Add(data)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !added {
|
||||
return ErrAlreadyInQueue
|
||||
}
|
||||
|
||||
if fn != nil {
|
||||
err = fn()
|
||||
if err != nil {
|
||||
_, remErr := queue.set.Remove(data)
|
||||
if remErr != nil {
|
||||
return fmt.Errorf("%v & %v", err, remErr)
|
||||
}
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return queue.q.LPush(data)
|
||||
}
|
||||
|
||||
// RPush pushes data to the right of the queue
|
||||
func (queue *UniqueQueue) RPush(data []byte) error {
|
||||
return queue.RPushFunc(data, nil)
|
||||
}
|
||||
|
||||
// RPushFunc pushes data to the right of the queue and calls the callback if is added
|
||||
func (queue *UniqueQueue) RPushFunc(data []byte, fn func() error) error {
|
||||
added, err := queue.set.Add(data)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
if !added {
|
||||
return ErrAlreadyInQueue
|
||||
}
|
||||
|
||||
if fn != nil {
|
||||
err = fn()
|
||||
if err != nil {
|
||||
_, remErr := queue.set.Remove(data)
|
||||
if remErr != nil {
|
||||
return fmt.Errorf("%v & %v", err, remErr)
|
||||
}
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return queue.q.RPush(data)
|
||||
}
|
||||
|
||||
// RPop pop data from the right of the queue
|
||||
func (queue *UniqueQueue) RPop() ([]byte, error) {
|
||||
popped, err := queue.q.RPop()
|
||||
if err != nil {
|
||||
return popped, err
|
||||
}
|
||||
_, err = queue.set.Remove(popped)
|
||||
|
||||
return popped, err
|
||||
}
|
||||
|
||||
// RHandle receives a user callback function to handle the right element of the queue, if the function returns nil, then delete the element, otherwise keep the element.
|
||||
func (queue *UniqueQueue) RHandle(h func([]byte) error) error {
|
||||
return queue.q.RHandle(func(data []byte) error {
|
||||
err := h(data)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = queue.set.Remove(data)
|
||||
return err
|
||||
})
|
||||
}
|
||||
|
||||
// LPop pops data from left of the queue
|
||||
func (queue *UniqueQueue) LPop() ([]byte, error) {
|
||||
popped, err := queue.q.LPop()
|
||||
if err != nil {
|
||||
return popped, err
|
||||
}
|
||||
_, err = queue.set.Remove(popped)
|
||||
|
||||
return popped, err
|
||||
}
|
||||
|
||||
// LHandle receives a user callback function to handle the left element of the queue, if the function returns nil, then delete the element, otherwise keep the element.
|
||||
func (queue *UniqueQueue) LHandle(h func([]byte) error) error {
|
||||
return queue.q.LHandle(func(data []byte) error {
|
||||
err := h(data)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
_, err = queue.set.Remove(data)
|
||||
return err
|
||||
})
|
||||
}
|
||||
|
||||
// Has checks whether the data is already in the queue
|
||||
func (queue *UniqueQueue) Has(data []byte) (bool, error) {
|
||||
return queue.set.Has(data)
|
||||
}
|
||||
|
||||
// Len returns the length of the queue
|
||||
func (queue *UniqueQueue) Len() int64 {
|
||||
queue.set.lock.Lock()
|
||||
defer queue.set.lock.Unlock()
|
||||
return queue.q.Len()
|
||||
}
|
||||
|
||||
// Close closes the queue (and the underlying DB if set to closeUnderlyingDB)
|
||||
func (queue *UniqueQueue) Close() error {
|
||||
_ = queue.q.Close()
|
||||
_ = queue.set.Close()
|
||||
if !queue.closeUnderlyingDB {
|
||||
queue.db = nil
|
||||
return nil
|
||||
}
|
||||
err := queue.db.Close()
|
||||
queue.db = nil
|
||||
return err
|
||||
}
|
||||
Loading…
Reference in new issue