add get

README.md

@@ -135,6 +135,41 @@ URL地址 `/delete`
 |:-------:|:-----------:|:------------:|:-----------------:|
 |   id  | string     |    Job唯一标识       |            |
 
+
+### 查询任务  
+URL地址 `/get`   
+
+```json
+{
+  "id": "15702398321"
+}
+```
+
+|  参数名 |     类型    |     含义     |        备注       |
+|:-------:|:-----------:|:------------:|:-----------------:|
+|   id  | string     |    Job唯一标识       |            |
+
+
+
+队列中有任务返回值
+```json
+{
+  "code": 0,
+  "message": "操作成功",
+  "data": {
+    "id": "15702398321",
+    "body": "{\"uid\": 10829378,\"created\": 1498657365 }"
+  }
+}
+```
+队列为空返回值   
+```json
+{
+  "code": 0,
+  "message": "操作成功",
+  "data": null
+}
+```
 
 ### 完成任务   
 URL地址 `/finish`   

cmd/cmd.go

@@ -3,13 +3,14 @@ package cmd
 import (
 	"flag"
 	"fmt"
-	"github.com/ouqiang/delay-queue/config"
-	"github.com/ouqiang/delay-queue/delayqueue"
-	"github.com/ouqiang/delay-queue/routers"
 	"log"
 	"net/http"
 	_ "net/http/pprof"
 	"os"
+
+	"github.com/ouqiang/delay-queue/config"
+	"github.com/ouqiang/delay-queue/delayqueue"
+	"github.com/ouqiang/delay-queue/routers"
 )
 
 type Cmd struct{}
@@ -53,6 +54,7 @@ func (cmd *Cmd) runWeb() {
 	http.HandleFunc("/pop", routers.Pop)
 	http.HandleFunc("/finish", routers.Delete)
 	http.HandleFunc("/delete", routers.Delete)
+	http.HandleFunc("/get", routers.Get)
 
 	log.Printf("listen %s\n", config.Setting.BindAddress)
 	err := http.ListenAndServe(config.Setting.BindAddress, nil)

config/config.go

@@ -1,8 +1,9 @@
 package config
 
 import (
-	"gopkg.in/ini.v1"
 	"log"
+
+	"gopkg.in/ini.v1"
 )
 
 // 解析配置文件

delayqueue/delay_queue.go

@@ -3,9 +3,10 @@ package delayqueue
 import (
 	"errors"
 	"fmt"
-	"github.com/ouqiang/delay-queue/config"
 	"log"
 	"time"
+
+	"github.com/ouqiang/delay-queue/config"
 )
 
 var (
@@ -75,6 +76,20 @@ func Remove(jobId string) error {
 	return removeJob(jobId)
 }
 
+// 查询Job
+func Get(jobId string) (*Job, error) {
+	job, err := getJob(jobId)
+	if err != nil {
+		return job, err
+	}
+
+	// 消息不存在, 可能已被删除
+	if job == nil {
+		return nil, nil
+	}
+	return job, err
+}
+
 // 轮询获取Job名称, 使job分布到不同bucket中, 提高扫描速度
 func generateBucketName() <-chan string {
 	c := make(chan string)

delayqueue/ready_queue.go

@@ -2,6 +2,7 @@ package delayqueue
 
 import (
 	"fmt"
+
 	"github.com/ouqiang/delay-queue/config"
 )
 

delayqueue/redis.go

@@ -1,10 +1,11 @@
 package delayqueue
 
 import (
-	"github.com/garyburd/redigo/redis"
-	"github.com/ouqiang/delay-queue/config"
 	"log"
 	"time"
+
+	"github.com/garyburd/redigo/redis"
+	"github.com/ouqiang/delay-queue/config"
 )
 
 var (

routers/routers.go

@@ -2,12 +2,13 @@ package routers
 
 import (
 	"encoding/json"
-	"github.com/ouqiang/delay-queue/delayqueue"
 	"io/ioutil"
 	"log"
 	"net/http"
 	"strings"
 	"time"
+
+	"github.com/ouqiang/delay-queue/delayqueue"
 )
 
 type PopRequest struct {
@@ -123,6 +124,45 @@ func Delete(resp http.ResponseWriter, req *http.Request) {
 	resp.Write(generateSuccessBody("操作成功", nil))
 }
 
+// 查询job
+func Get(resp http.ResponseWriter, req *http.Request) {
+	var deleteRequest DeleteRequest
+	err := readBody(resp, req, &deleteRequest)
+	if err != nil {
+		return
+	}
+	id := strings.TrimSpace(deleteRequest.Id)
+	if id == "" {
+		resp.Write(generateFailureBody("job id不能为空"))
+		return
+	}
+	job, err := delayqueue.Get(id)
+	if err != nil {
+		log.Printf("查询job失败#%s", err.Error())
+		resp.Write(generateFailureBody("查询Job失败"))
+		return
+	}
+
+	if job == nil {
+		resp.Write(generateSuccessBody("操作成功", nil))
+		return
+	}
+
+	type Data struct {
+		Id   string `json:"id"`
+		Body string `json:"body"`
+	}
+
+	data := Data{
+		Id:   job.Id,
+		Body: job.Body,
+	}
+
+	log.Printf("get job#%+v", data)
+
+	resp.Write(generateSuccessBody("操作成功", data))
+}
+
 type ResponseBody struct {
 	Code    int         `json:"code"`
 	Message string      `json:"message"`