merge

.hgtags

@@ -27,3 +27,4 @@ dee83cac69e07ed4f3efde162d981f5855101845 go1-0.0.1
 0000000000000000000000000000000000000000 0.1.1
 0000000000000000000000000000000000000000 0.1.1
 eea0878b43d209630d7b342b1b99c61c839b454f 0.1.1
+67f11fa2301f5e74a436883f66ce7fb121a4df82 0.1.2

README.md

@@ -32,7 +32,7 @@ Install both:
         log.Println(e)
     }
     w.AddServer("127.0.0.1:4730")
-    w.AddFunc("ToUpper", ToUpper, 0)
+    w.AddFunc("ToUpper", ToUpper, worker.Immediately)
     w.AddFunc("ToUpperTimeOut5", ToUpper, 5)
     w.Work()
 
@@ -63,6 +63,7 @@ Xing Xing <mikespook@gmail.com>
 
 # History
 
+ * 0.1.2    Fixed issues: timeout executing, resources leaking.
  * 0.1.1    Fixed the issue of grabbing jobs.
  * 0.1      Code refactoring; Redesign the API.
  * 0.0.1    Initial implementation, ugly code-style, slow profermance and unstable API.

common/gearman.go

@@ -5,6 +5,11 @@
 
 package common
 
+import (
+    "bytes"
+    "encoding/binary"
+)
+
 const (
     NETWORK = "tcp"
     // queue size
@@ -55,12 +60,25 @@ const (
 
 // Decode [4]byte to uint32 
 func BytesToUint32(buf [4]byte) uint32 {
-    return uint32(buf[0])<<24 + uint32(buf[1])<<16 + uint32(buf[2])<<8 +
+    var r uint32
-        uint32(buf[3])
+    b := bytes.NewBuffer(buf[:])
+    err := binary.Read(b, binary.BigEndian, &r)
+    if err != nil {
+        return 0
+    }
+    return r
 }
 
 // Encode uint32 to [4]byte
 func Uint32ToBytes(i uint32) [4]byte {
-    return [4]byte{byte((i >> 24) & 0xff), byte((i >> 16) & 0xff),
+    buf := new(bytes.Buffer)
-        byte((i >> 8) & 0xff), byte(i & 0xff),}
+    err := binary.Write(buf, binary.BigEndian, i)
+    if err != nil {
+        return [4]byte{0, 0, 0, 0}
+    }
+    var r [4]byte
+    for k, v := range buf.Bytes() {
+        r[k] = v
+    }
+    return r
 }

common/gearman_test.go

@@ -0,0 +1,38 @@
+package common
+
+import (
+    "bytes"
+    "testing"
+)
+
+var (
+    testCase = map[uint32][4]byte {
+        0: [...]byte{0, 0, 0, 0},
+        1: [...]byte{0, 0, 0, 1},
+        256: [...]byte{0, 0, 1, 0},
+        256 * 256: [...]byte{0, 1, 0, 0},
+        256 * 256 * 256: [...]byte{1, 0, 0, 0},
+        256 * 256 * 256 + 256 * 256 + 256 + 1: [...]byte{1, 1, 1, 1},
+        4294967295 : [...]byte{0xFF, 0xFF, 0xFF, 0xFF},
+    }
+)
+
+func TestUint32ToBytes(t *testing.T) {
+    for k, v := range testCase {
+        b := Uint32ToBytes(k)
+        if bytes.Compare(b[:], v[:]) != 0 {
+            t.Errorf("%v was expected, but %v was got", v, b)
+        }
+    }
+}
+
+func TestBytesToUint32s(t *testing.T) {
+    for k, v := range testCase {
+        u := BytesToUint32([4]byte(v))
+        if u != k {
+            t.Errorf("%v was expected, but %v was got", k, u)
+        }
+    }
+}
+
+

example/py/client.py

@@ -12,10 +12,38 @@ def check_request_status(job_request):
 
 def main():
     client = gearman.GearmanClient(['localhost:4730', 'otherhost:4730'])
+    try:
         completed_job_request = client.submit_job("ToUpper", "arbitrary binary data")
         check_request_status(completed_job_request)
+    except Exception as e:
+        print type(e)
+
+
+    try:
+        completed_job_request = client.submit_job("ToUpperTimeOut5", "arbitrary binary data")
+        check_request_status(completed_job_request)
+    except Exception as e:
+        print type(e)
+
+
+    try:
+        completed_job_request = client.submit_job("ToUpperTimeOut20", "arbitrary binary data")
+        check_request_status(completed_job_request)
+    except Exception as e:
+        print type(e)
+
+    try:
+        completed_job_request = client.submit_job("SysInfo", "")
+        check_request_status(completed_job_request)
+    except Exception as e:
+        print type(e)
+
+    try:
+        completed_job_request = client.submit_job("MemInfo", "")
+        check_request_status(completed_job_request)
+    except Exception as e:
+        print type(e)
 
 if __name__ == '__main__':
-    for i in range(100):
     main()
 

example/worker.go

@@ -3,18 +3,29 @@ package main
 import (
     "os"
     "log"
+    "time"
     "strings"
     "bitbucket.org/mikespook/golib/signal"
     "bitbucket.org/mikespook/gearman-go/worker"
 )
 
 func ToUpper(job *worker.Job) ([]byte, error) {
-    log.Printf("Handle=[%s]; UID=[%s], Data=[%s]\n",
+    log.Printf("ToUpper: Handle=[%s]; UID=[%s], Data=[%s]\n",
         job.Handle, job.UniqueId, job.Data)
     data := []byte(strings.ToUpper(string(job.Data)))
     return data, nil
 }
 
+func ToUpperDelay10(job *worker.Job) ([]byte, error) {
+    log.Printf("ToUpperDelay10: Handle=[%s]; UID=[%s], Data=[%s]\n",
+        job.Handle, job.UniqueId, job.Data)
+    time.Sleep(10 * time.Second)
+    data := []byte(strings.ToUpper(string(job.Data)))
+    return data, nil
+}
+
+
+
 func main() {
     log.Println("Starting ...")
     defer log.Println("Shutdown complete!")
@@ -33,13 +44,16 @@ func main() {
         }
     }
     w.JobHandler = func(job *worker.Job) error {
-        log.Printf("H=%s, UID=%s, Data=%s\n", job.Handle,
+        log.Printf("H=%s, UID=%s, Data=%s, DataType=%d\n", job.Handle,
-            job.UniqueId, job.Data)
+            job.UniqueId, job.Data, job.DataType)
         return nil
     }
     w.AddServer("127.0.0.1:4730")
-    w.AddFunc("ToUpper", ToUpper, 0)
+    w.AddFunc("ToUpper", ToUpper, worker.Immediately)
-    //w.AddFunc("ToUpperTimeOut5", ToUpper, 5)
+    w.AddFunc("ToUpperTimeOut5", ToUpperDelay10, 5)
+    w.AddFunc("ToUpperTimeOut20", ToUpperDelay10, 20)
+    w.AddFunc("SysInfo", worker.SysInfo, worker.Immediately)
+    w.AddFunc("MemInfo", worker.MemInfo, worker.Immediately)
     go w.Work()
     sh := signal.NewHandler()
     sh.Bind(os.Interrupt, func() bool {return true})

worker/agent.go

@@ -7,7 +7,6 @@ package worker
 import (
     "io"
     "net"
-    "time"
     "bitbucket.org/mikespook/gearman-go/common"
 )
 
@@ -33,6 +32,8 @@ func newAgent(addr string, worker *Worker) (a *agent, err error) {
         in: make(chan []byte, common.QUEUE_SIZE),
         out: make(chan *Job, common.QUEUE_SIZE),
     }
+    // reset abilities
+    a.WriteJob(newJob(common.REQ, common.RESET_ABILITIES, nil))
     return
 }
 
@@ -52,27 +53,20 @@ func (a *agent) outLoop() {
 // inputing loop
 func (a *agent) inLoop() {
     defer func() {
-        recover()
+        if r := recover(); r != nil {
+            a.worker.err(common.Errorf("Exiting: %s", r))
+        }
         close(a.in)
         close(a.out)
         a.worker.removeAgent(a)
     }()
-    noop := true
-    go func() {
-        for a.worker.running {
-            if noop && len(a.in) == 0 {
-                a.WriteJob(newJob(common.REQ, common.GRAB_JOB, nil))
-            }
-            <-time.After(time.Second)
-        }
-    }()
     for a.worker.running {
+        a.WriteJob(newJob(common.REQ, common.PRE_SLEEP, nil))
         RESTART:
         // got noop msg and in queue is zero, grab job
         rel, err := a.read()
         if err != nil {
             if err == common.ErrConnection {
-                // TODO: reconnection
                 for i:= 0; i < 3 && a.worker.running; i++ {
                     if conn, err := net.Dial(common.NETWORK, a.addr); err != nil {
                         a.worker.err(common.Errorf("Reconnection: %d faild", i))
@@ -95,10 +89,7 @@ func (a *agent) inLoop() {
         }
         switch job.DataType {
         case common.NOOP:
-            noop = true
+            a.WriteJob(newJob(common.REQ, common.GRAB_JOB_UNIQ, nil))
-        case common.NO_JOB:
-            noop = false
-            a.WriteJob(newJob(common.REQ, common.PRE_SLEEP, nil))
         case common.ERROR, common.ECHO_RES, common.JOB_ASSIGN_UNIQ, common.JOB_ASSIGN:
             job.agent = a
             a.worker.in <- job

worker/func.go

@@ -0,0 +1,31 @@
+package worker
+
+import (
+    "runtime"
+    "encoding/json"
+)
+
+type systemInfo struct {
+    GOOS, GOARCH, GOROOT, Version string
+    NumCPU, NumGoroutine int
+    NumCgoCall int64
+}
+
+func SysInfo(job *Job) ([]byte, error) {
+    return json.Marshal(&systemInfo{
+        GOOS: runtime.GOOS,
+        GOARCH: runtime.GOARCH,
+        GOROOT: runtime.GOROOT(),
+        Version: runtime.Version(),
+        NumCPU: runtime.NumCPU(),
+        NumGoroutine: runtime.NumGoroutine(),
+        NumCgoCall: runtime.NumCgoCall(),
+    })
+}
+
+var memState runtime.MemStats
+
+func MemInfo(job *Job) ([]byte, error) {
+    runtime.ReadMemStats(&memState)
+    return json.Marshal(&memState)
+}

worker/job.go

@@ -16,13 +16,16 @@ type Job struct {
     Handle, UniqueId    string
     agent               *agent
     magicCode, DataType uint32
+    c chan bool
 }
 
 // Create a new job
 func newJob(magiccode, datatype uint32, data []byte) (job *Job) {
     return &Job{magicCode: magiccode,
         DataType: datatype,
-        Data:     data}
+        Data:     data,
+        c: make(chan bool),
+    }
 }
 
 // Decode job from byte slice
@@ -42,24 +45,30 @@ func decodeJob(data []byte) (job *Job, err error) {
 
 // Encode a job to byte slice
 func (job *Job) Encode() (data []byte) {
-    l := len(job.Data)
+    var l int
-    tl := l
+    if job.DataType == common.WORK_FAIL {
+        l = len(job.Handle)
+    } else {
+        l = len(job.Data)
         if job.Handle != "" {
-        tl += len(job.Handle) + 1
+            l += len(job.Handle) + 1
         }
-    data = make([]byte, 0, tl + 12)
+    }
+    data = make([]byte, 0, l + 12)
 
     magiccode := common.Uint32ToBytes(job.magicCode)
     datatype := common.Uint32ToBytes(job.DataType)
-    datalength := common.Uint32ToBytes(uint32(tl))
+    datalength := common.Uint32ToBytes(uint32(l))
 
     data = append(data, magiccode[:]...)
     data = append(data, datatype[:]...)
     data = append(data, datalength[:]...)
     if job.Handle != "" {
         data = append(data, []byte(job.Handle)...)
+        if job.DataType != common.WORK_FAIL {
            data = append(data, 0)
        }
+    }
     data = append(data, job.Data...)
     return
 }
@@ -88,3 +97,19 @@ func (job *Job) UpdateStatus(numerator, denominator int) {
     result = append(result, d...)
     job.agent.WriteJob(newJob(common.REQ, common.WORK_STATUS, result))
 }
+
+// close the job
+func (job *Job) Close() {
+    close(job.c)
+}
+
+// cancel the job executing
+func (job *Job) cancel() {
+    defer func() {recover()}()
+    job.c <- true
+}
+
+// When a job was canceled, return a true form a channel
+func (job *Job) Canceled() <-chan bool {
+    return job.c
+}

worker/worker.go

@@ -5,6 +5,7 @@
 package worker
 
 import (
+    "time"
     "bytes"
     "bitbucket.org/mikespook/gearman-go/common"
 )
@@ -12,6 +13,8 @@ import (
 const (
     Unlimited = 0
     OneByOne = 1
+
+    Immediately = 0
 )
 
 var (
@@ -20,7 +23,7 @@ var (
 // Job handler
 type JobHandler func(*Job) error
 
-type JobFunc func(job *Job) ([]byte, error)
+type JobFunc func(*Job) ([]byte, error)
 
 // The definition of the callback function.
 type jobFunc struct {
@@ -178,21 +181,20 @@ func (worker *Worker) Work() {
     var job *Job
     for ok {
         if job, ok = <-worker.in; ok {
+            go func() {
+                defer job.Close()
                 switch job.DataType {
                 case common.ERROR:
-                go func() {
                     _, err := common.GetError(job.Data)
                     worker.err(err)
-                }()
                 case common.JOB_ASSIGN, common.JOB_ASSIGN_UNIQ:
-                go func() {
                     if err := worker.exec(job); err != nil {
                         worker.err(err)
                     }
-                }()
                 default:
-                go worker.handleJob(job)
+                    worker.handleJob(job)
                 }
+            }()
         }
     }
 }
@@ -271,21 +273,28 @@ func (worker *Worker) exec(job *Job) (err error) {
     if !ok {
         return common.Errorf("The function does not exist: %s", funcname)
     }
-    result, err := f.f(job)
+    var r *result
+    if f.timeout == 0 {
+        d, e := f.f(job)
+        r = &result{data:d, err: e}
+    } else {
+        r = execTimeout(f.f, job, time.Duration(f.timeout) * time.Second)
+    }
     var datatype uint32
-    if err == nil {
+    if r.err == nil {
         datatype = common.WORK_COMPLETE
     } else {
-        if result == nil {
+        if r.data == nil {
             datatype = common.WORK_FAIL
         } else {
             datatype = common.WORK_EXCEPTION
         }
+        err = r.err
     }
 
     job.magicCode = common.REQ
     job.DataType = datatype
-    job.Data = result
+    job.Data = r.data
     job.agent.WriteJob(job)
     return
 }
@@ -300,3 +309,25 @@ func (worker *Worker) removeAgent(a *agent) {
         worker.err(common.ErrNoActiveAgent)
     }
 }
+
+type result struct {
+    data []byte
+    err error
+}
+
+func execTimeout(f JobFunc, job *Job, timeout time.Duration) (r *result) {
+    rslt := make(chan *result)
+    defer close(rslt)
+    go func() {
+        defer func() {recover()}()
+        d, e := f(job)
+        rslt <- &result{data: d, err: e}
+    }()
+    select {
+    case r = <-rslt:
+    case <-time.After(timeout):
+        go job.cancel()
+        return &result{err:common.ErrExecTimeOut}
+    }
+    return r
+}