Initial commit

Author: michaloo

.gitignore

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+# Compiled Object files, Static and Dynamic libs (Shared Objects)
+*.o
+*.a
+*.so
+
+# Folders
+_obj
+_test
+
+# Architecture specific extensions/prefixes
+*.[568vq]
+[568vq].out
+
+*.cgo1.go
+*.cgo2.c
+_cgo_defun.c
+_cgo_gotypes.go
+_cgo_export.*
+
+_testmain.go
+
+*.exe
+*.test
+
+dist

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2014 Michał Rączka
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+go-cron
+=========
+
+Simple golang wrapper over `github.com/robfig/cron` and `os/exec` as a cron replacement
+
+## usage
+
+`go-cron "* * * * * *" /bin/bash -c "echo 1"`

bin/build

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+#!/bin/bash
+
+
+cd /scheduler
+go get
+rm -rf dist
+mkdir -p dist
+cd ./dist
+go build -o go-cron /scheduler/scheduler.go
+tar -cf go-cron.tar.gz go-cron

bin/docker

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+#!/bin/bash
+
+VOLUME="${DOCKER_REMOTE_PATH}${PWD#${DOCKER_CLIENT_PATH}}/:/scheduler"
+
+docker run -i -t \
+    --rm \
+    -w /scheduler \
+    -v $VOLUME \
+    michaloo/golangdev \
+    $@

scheduler.go

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+package main
+import "os"
+import "os/exec"
+import "strings"
+import "sync"
+import "os/signal"
+import "syscall"
+import "github.com/robfig/cron"
+
+func execute(command string, args []string)(output string, e error) {
+
+    println("executing:", command, strings.Join(args, " "))
+
+    cmd := exec.Command(command, args...)
+    out, err := cmd.Output()
+
+    if err != nil {
+        return "", err
+    }
+
+    return string(out), nil
+}
+
+func create() (cr *cron.Cron, wgr *sync.WaitGroup) {
+    var schedule string = os.Args[1]
+    var command string = os.Args[2]
+    var args []string = os.Args[3:len(os.Args)]
+
+    wg := &sync.WaitGroup{}
+
+    c := cron.New()
+    println("new cron:", schedule)
+
+    c.AddFunc(schedule, func() {
+        wg.Add(1)
+        out, err := execute(command, args)
+        wg.Done()
+        if err != nil {
+            println(err.Error())
+        }
+
+        println(out)
+    })
+
+    return c, wg
+}
+
+func start(c *cron.Cron, wg *sync.WaitGroup) {
+    c.Start()
+}
+
+func stop(c *cron.Cron, wg *sync.WaitGroup) {
+    println("Stopping")
+    c.Stop()
+    println("Waiting")
+    wg.Wait()
+    println("Exiting")
+    os.Exit(0)
+}
+
+func main() {
+
+    c, wg := create()
+
+    go start(c, wg)
+
+    ch := make(chan os.Signal, 1)
+    signal.Notify(ch, syscall.SIGINT, syscall.SIGTERM)
+    println(<-ch)
+
+    stop(c, wg)
+}
+
+

test/run

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+#!/bin/bash
+
+go run ./scheduler.go "* * * * * *" /bin/bash -c "echo 1;"