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68
.gitignore
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68
.gitignore
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# Created by .ignore support plugin (hsz.mobi)
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### JetBrains template
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# Covers JetBrains IDEs: IntelliJ, RubyMine, PhpStorm, AppCode, PyCharm, CLion, Android Studio and Webstorm
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# Reference: https://intellij-support.jetbrains.com/hc/en-us/articles/206544839
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# User-specific stuff:
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.idea/**/workspace.xml
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.idea/**/tasks.xml
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.idea/dictionaries
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# Sensitive or high-churn files:
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.idea/**/dataSources/
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.idea/**/dataSources.ids
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.idea/**/dataSources.xml
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.idea/**/dataSources.local.xml
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.idea/**/sqlDataSources.xml
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.idea/**/dynamic.xml
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.idea/**/uiDesigner.xml
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# Gradle:
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.idea/**/gradle.xml
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.idea/**/libraries
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# Mongo Explorer plugin:
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.idea/**/mongoSettings.xml
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## File-based project format:
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*.iws
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## Plugin-specific files:
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# IntelliJ
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/out/
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# mpeltonen/sbt-idea plugin
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.idea_modules/
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# JIRA plugin
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atlassian-ide-plugin.xml
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# Crashlytics plugin (for Android Studio and IntelliJ)
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com_crashlytics_export_strings.xml
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crashlytics.properties
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crashlytics-build.properties
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fabric.properties
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### Go template
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# Binaries for programs and plugins
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*.exe
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*.dll
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*.so
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*.dylib
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# Test binary, build with `go test -c`
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*.test
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# Output of the go coverage tool, specifically when used with LiteIDE
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*.out
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# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
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.glide/
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.idea/
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*.iml
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vendor/
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glide.lock
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.DS_Store
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dist/
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debug
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32
.vscode/launch.json
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32
.vscode/launch.json
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{
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"version": "0.2.0",
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"configurations": [
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{
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"name": "Debug",
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"type": "go",
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"request": "launch",
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"mode": "debug",
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"remotePath": "",
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"port": 2345,
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"host": "127.0.0.1",
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"program": "${workspaceRoot}/main.go",
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"env": {},
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"args": [],
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"showLog": true
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},
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{
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"name": "File Debug",
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"type": "go",
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"request": "launch",
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"mode": "debug",
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"remotePath": "",
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"port": 2345,
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"host": "127.0.0.1",
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"program": "${fileDirname}",
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"env": {},
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"args": [],
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"showLog": true
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}
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]
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}
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11
.vscode/settings.json
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11
.vscode/settings.json
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// Place your settings in this file to overwrite default and user settings.
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{
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// Specifies Lint tool name.
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"go.lintTool": "gometalinter",
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// Flags to pass to Lint tool (e.g. ["-min_confidence=.8"])
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"go.lintFlags": [
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"--config=${workspaceRoot}/golint.json"
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]
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}
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8
glide.yaml
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8
glide.yaml
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package: git.loafle.net/overflow/overflow_subscriber
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import:
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- package: git.loafle.net/commons_go/util
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subpackages:
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- channel
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- package: github.com/garyburd/redigo
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subpackages:
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- redis
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119
redis/subscriber.go
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119
redis/subscriber.go
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package redis
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import (
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"context"
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"log"
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channelUtil "git.loafle.net/commons_go/util/channel"
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ofSubscriber "git.loafle.net/overflow/overflow_subscriber"
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"github.com/garyburd/redigo/redis"
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)
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type subscribeChannelAction struct {
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channelUtil.Action
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channel string
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cb ofSubscriber.OnSubscribeFunc
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}
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type Subscriber interface {
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ofSubscriber.Subscriber
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}
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type subscriber struct {
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ctx context.Context
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conn redis.PubSubConn
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subListeners map[string]ofSubscriber.OnSubscribeFunc
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isListenSubscriptions bool
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subCh chan subscribeChannelAction
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}
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func New(ctx context.Context, conn redis.Conn) Subscriber {
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n := &subscriber{
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ctx: ctx,
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subListeners: make(map[string]ofSubscriber.OnSubscribeFunc),
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isListenSubscriptions: false,
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subCh: make(chan subscribeChannelAction),
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}
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n.conn = redis.PubSubConn{Conn: conn}
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go n.listen()
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return n
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}
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func (n *subscriber) listen() {
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for {
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select {
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case sa := <-n.subCh:
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switch sa.Type {
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case channelUtil.ActionTypeCreate:
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_, ok := n.subListeners[sa.channel]
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if ok {
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log.Fatalf("Subscriber: Subscription of channel[%s] is already exist", sa.channel)
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} else {
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n.subListeners[sa.channel] = sa.cb
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n.conn.Subscribe(sa.channel)
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n.listenSubscriptions()
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}
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break
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case channelUtil.ActionTypeDelete:
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_, ok := n.subListeners[sa.channel]
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if ok {
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n.conn.Unsubscribe(sa.channel)
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delete(n.subListeners, sa.channel)
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} else {
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log.Fatalf("Subscriber: Subscription of channel[%s] is not exist", sa.channel)
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}
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break
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}
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case <-n.ctx.Done():
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log.Println("redis subscriber: Context Done")
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n.conn.Close()
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return
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}
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}
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}
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func (n *subscriber) listenSubscriptions() {
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if n.isListenSubscriptions {
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return
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}
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go func() {
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for {
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switch v := n.conn.Receive().(type) {
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case redis.Message:
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if cb, ok := n.subListeners[v.Channel]; ok {
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cb(v.Channel, string(v.Data))
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}
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case redis.Subscription:
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log.Printf("subscription message: %s: %s %d\n", v.Channel, v.Kind, v.Count)
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case error:
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log.Println("error pub/sub, delivery has stopped")
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return
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default:
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}
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}
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}()
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n.isListenSubscriptions = true
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}
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func (n *subscriber) Subscribe(channel string, cb ofSubscriber.OnSubscribeFunc) {
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ca := subscribeChannelAction{
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channel: channel,
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cb: cb,
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}
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ca.Type = channelUtil.ActionTypeCreate
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n.subCh <- ca
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}
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func (n *subscriber) Unsubscribe(channel string) {
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ca := subscribeChannelAction{
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channel: channel,
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}
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ca.Type = channelUtil.ActionTypeDelete
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n.subCh <- ca
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}
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10
subscriber.go
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10
subscriber.go
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package overflow_subscriber
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type (
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OnSubscribeFunc func(channel string, payload string)
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)
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type Subscriber interface {
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Subscribe(channel string, cb OnSubscribeFunc)
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Unsubscribe(channel string)
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}
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