331529fc94
* add an Aerospike storage backend * go mod vendor * add Aerospike storage configuration docs * review fixes * bump aerospike client to v3.1.1 * rename the defaultHostname variable * relocate the docs page
85 lines
2 KiB
Go
85 lines
2 KiB
Go
// Copyright 2013-2020 Aerospike, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package aerospike
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import (
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"time"
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. "github.com/aerospike/aerospike-client-go/internal/atomic"
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. "github.com/aerospike/aerospike-client-go/types"
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)
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// Task interface defines methods for asynchronous tasks.
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type Task interface {
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IsDone() (bool, error)
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onComplete(ifc Task) chan error
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OnComplete() chan error
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}
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// baseTask is used to poll for server task completion.
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type baseTask struct {
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retries AtomicInt
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cluster *Cluster
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}
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// newTask initializes task with fields needed to query server nodes.
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func newTask(cluster *Cluster) *baseTask {
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return &baseTask{
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cluster: cluster,
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}
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}
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// Wait for asynchronous task to complete using default sleep interval.
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func (btsk *baseTask) onComplete(ifc Task) chan error {
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ch := make(chan error, 1)
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// goroutine will loop every <interval> until IsDone() returns true or error
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go func() {
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// always close the channel on return
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defer close(ch)
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var interval = 100 * time.Millisecond
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for {
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select {
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case <-time.After(interval):
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done, err := ifc.IsDone()
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// Every 5 failed retries increase the interval
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if btsk.retries.IncrementAndGet()%5 == 0 {
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interval *= 2
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if interval > 5*time.Second {
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interval = 5 * time.Second
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}
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}
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if err != nil {
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ae, ok := err.(AerospikeError)
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if ok && ae.ResultCode() == TIMEOUT {
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ae.MarkInDoubt()
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}
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ch <- ae
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return
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} else if done {
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ch <- nil
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return
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}
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} // select
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} // for
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}()
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return ch
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}
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