diff --git a/worker/agent.go b/worker/agent.go
index 7d4fa56..7a9f70d 100644
--- a/worker/agent.go
+++ b/worker/agent.go
@@ -39,38 +39,10 @@ func (a *agent) Connect() (err error) {
 }
 
 func (a *agent) Work() {
-	go a.readLoop()
-
-	var resp *Response
+	var inpack *inPack
 	var l int
 	var err error
 	var data, leftdata []byte
-	for data = range a.in {
-		if len(leftdata) > 0 { // some data left for processing
-			data = append(leftdata, data...)
-		}
-		l = len(data)
-		if l < MIN_PACKET_LEN { // not enough data
-			leftdata = data
-			continue
-		}
-		if resp, l, err = decodeResponse(data); err != nil {
-			a.worker.err(err)
-			continue
-		}
-		leftdata = nil
-		resp.agentId = a.net + a.addr
-		a.worker.in <- resp
-		if len(data) > l {
-			leftdata = data[l:]
-		}
-	}
-}
-
-// read data from socket
-func (a *agent) readLoop() {
-	var data []byte
-	var err error
 	for a.isConn {
 		if data, err = a.read(BUFFER_SIZE); err != nil {
 			if err == ErrConnClosed {
@@ -79,9 +51,24 @@ func (a *agent) readLoop() {
 			a.worker.err(err)
 			continue
 		}
-		a.in <- data
+		if len(leftdata) > 0 { // some data left for processing
+			data = append(leftdata, data...)
+		}
+		if len(data) < MIN_PACKET_LEN { // not enough data
+			leftdata = data
+			continue
+		}
+		if inpack, l, err = decodeInPack(data); err != nil {
+			a.worker.err(err)
+			continue
+		}
+		leftdata = nil
+		inpack.a = a
+		a.worker.in <- inpack
+		if len(data) > l {
+			leftdata = data[l:]
+		}
 	}
-	close(a.in)
 }
 
 func (a *agent) Close() {
@@ -115,9 +102,9 @@ func (a *agent) read(length int) (data []byte, err error) {
 }
 
 // Internal write the encoded job.
-func (a *agent) write(req *request) (err error) {
+func (a *agent) write(outpack *outPack) (err error) {
 	var n int
-	buf := req.Encode()
+	buf := outpack.Encode()
 	for i := 0; i < len(buf); i += n {
 		n, err = a.conn.Write(buf[i:])
 		if err != nil {
diff --git a/worker/inpack.go b/worker/inpack.go
index 6eb03d1..00d954b 100644
--- a/worker/inpack.go
+++ b/worker/inpack.go
@@ -9,23 +9,70 @@ import (
 	"bytes"
 	"fmt"
 	"encoding/binary"
+	"strconv"
 )
 
 // Worker side job
-type InPack struct {
-	DataType  uint32
-	Data                 []byte
-	Handle, UniqueId, Fn string
+type inPack struct {
+	dataType  uint32
+	data                 []byte
+	handle, uniqueId, fn string
 	a *agent
 }
 
 // Create a new job
-func getInPack() (resp *InPack) {
-	return &InPack{}
+func getInPack() *inPack {
+	return &inPack{}
 }
 
+func (inpack *inPack) Data() []byte {
+	return inpack.data
+}
+
+// Send some datas to client.
+// Using this in a job's executing.
+func (inpack *inPack) SendData(data []byte) {
+	outpack := getOutPack()
+	outpack.dataType = WORK_DATA
+	hl := len(inpack.handle)
+	l := hl + len(data) + 1
+	outpack.data = getBuffer(l)
+	copy(outpack.data, []byte(inpack.handle))
+	copy(outpack.data[hl + 1:], data)
+	inpack.a.write(outpack)
+}
+
+func (inpack *inPack) SendWarning(data []byte) {
+	outpack := getOutPack()
+	outpack.dataType = WORK_WARNING
+	hl := len(inpack.handle)
+	l := hl + len(data) + 1
+	outpack.data = getBuffer(l)
+	copy(outpack.data, []byte(inpack.handle))
+	copy(outpack.data[hl + 1:], data)
+	inpack.a.write(outpack)
+}
+
+// Update status.
+// Tall client how many percent job has been executed.
+func (inpack *inPack) UpdateStatus(numerator, denominator int) {
+	n := []byte(strconv.Itoa(numerator))
+	d := []byte(strconv.Itoa(denominator))
+	outpack := getOutPack()
+	outpack.dataType = WORK_STATUS
+	hl := len(inpack.handle)
+	nl := len(n)
+	dl := len(d)
+	outpack.data = getBuffer(hl + nl + dl + 3)
+	copy(outpack.data, []byte(inpack.handle))
+	copy(outpack.data[hl+1:], n)
+	copy(outpack.data[hl+nl+2:], d)
+	inpack.a.write(outpack)
+}
+
+
 // Decode job from byte slice
-func decodeInPack(data []byte) (resp *InPack, l int, err error) {
+func decodeInPack(data []byte) (inpack *inPack, l int, err error) {
 	if len(data) < MIN_PACKET_LEN { // valid package should not less 12 bytes
 		err = fmt.Errorf("Invalid data: %V", data)
 		return
@@ -36,26 +83,26 @@ func decodeInPack(data []byte) (resp *InPack, l int, err error) {
 		err = fmt.Errorf("Invalid data: %V", data)
 		return
 	}
-	resp = getInPack()
-	resp.DataType = binary.BigEndian.Uint32(data[4:8])
-	switch resp.DataType {
+	inpack = getInPack()
+	inpack.dataType = binary.BigEndian.Uint32(data[4:8])
+	switch inpack.dataType {
 	case JOB_ASSIGN:
 		s := bytes.SplitN(dt, []byte{'\x00'}, 3)
 		if len(s) == 3 {
-			resp.Handle = string(s[0])
-			resp.Fn = string(s[1])
-			resp.Data = s[2]
+			inpack.handle = string(s[0])
+			inpack.fn = string(s[1])
+			inpack.data = s[2]
 		}
 	case JOB_ASSIGN_UNIQ:
 		s := bytes.SplitN(dt, []byte{'\x00'}, 4)
 		if len(s) == 4 {
-			resp.Handle = string(s[0])
-			resp.Fn = string(s[1])
-			resp.UniqueId = string(s[2])
-			resp.Data = s[3]
+			inpack.handle = string(s[0])
+			inpack.fn = string(s[1])
+			inpack.uniqueId = string(s[2])
+			inpack.data = s[3]
 		}
 	default:
-		resp.Data = dt
+		inpack.data = dt
 	}
 	l = dl + MIN_PACKET_LEN
 	return
diff --git a/worker/job.go b/worker/job.go
index af032df..4f9950a 100644
--- a/worker/job.go
+++ b/worker/job.go
@@ -1,68 +1,8 @@
 package worker
 
-import (
-	"strconv"
-)
-
 type Job interface {
 	Data() []byte
 	SendWarning(data []byte)
 	SendData(data []byte)
 	UpdateStatus(numerator, denominator int)
 }
-
-type _job struct {
-	a *agent
-	Handle string
-	data []byte
-}
-
-func getJob() *_job {
-	return &_job{}
-}
-
-func (j *_job) Data() []byte {
-	return j.data
-}
-
-// Send some datas to client.
-// Using this in a job's executing.
-func (j *_job) SendData(data []byte) {
-	req := getRequest()
-	req.DataType = WORK_DATA
-	hl := len(j.Handle)
-	l := hl + len(data) + 1
-	req.Data = getBuffer(l)
-	copy(req.Data, []byte(j.Handle))
-	copy(req.Data[hl + 1:], data)
-	j.a.write(req)
-}
-
-func (j *_job) SendWarning(data []byte) {
-	req := getRequest()
-	req.DataType = WORK_WARNING
-	hl := len(j.Handle)
-	l := hl + len(data) + 1
-	req.Data = getBuffer(l)
-	copy(req.Data, []byte(j.Handle))
-	copy(req.Data[hl + 1:], data)
-	j.a.write(req)
-}
-
-// Update status.
-// Tall client how many percent job has been executed.
-func (j *_job) UpdateStatus(numerator, denominator int) {
-	n := []byte(strconv.Itoa(numerator))
-	d := []byte(strconv.Itoa(denominator))
-	req := getRequest()
-	req.DataType = WORK_STATUS
-	hl := len(j.Handle)
-	nl := len(n)
-	dl := len(d)
-	req.Data = getBuffer(hl + nl + dl + 3)
-	copy(req.Data, []byte(j.Handle))
-	copy(req.Data[hl+1:], n)
-	copy(req.Data[hl+nl+2:], d)
-	j.a.write(req)
-}
-
diff --git a/worker/outpack.go b/worker/outpack.go
index 17dce2b..109f888 100644
--- a/worker/outpack.go
+++ b/worker/outpack.go
@@ -10,41 +10,41 @@ import (
 )
 
 // Worker side job
-type OutPack struct {
-	DataType             uint32
-	Data                 []byte
-	Handle, UniqueId, Fn string
+type outPack struct {
+	dataType             uint32
+	data                 []byte
+	handle, uniqueId, fn string
 }
 
-func getOutPack() (req *OutPack) {
+func getOutPack() (outpack *outPack) {
 	// TODO pool
-	return &OutPack{}
+	return &outPack{}
 }
 
 // Encode a job to byte slice
-func (req *OutPack) Encode() (data []byte) {
+func (outpack *outPack) Encode() (data []byte) {
 	var l int
-	if req.DataType == WORK_FAIL {
-		l = len(req.Handle)
+	if outpack.dataType == WORK_FAIL {
+		l = len(outpack.handle)
 	} else {
-		l = len(req.Data)
-		if req.Handle != "" {
-			l += len(req.Handle) + 1
+		l = len(outpack.data)
+		if outpack.handle != "" {
+			l += len(outpack.handle) + 1
 		}
 	}
 	data = getBuffer(l + MIN_PACKET_LEN)
 	binary.BigEndian.PutUint32(data[:4], REQ)
-	binary.BigEndian.PutUint32(data[4:8], req.DataType)
+	binary.BigEndian.PutUint32(data[4:8], outpack.dataType)
 	binary.BigEndian.PutUint32(data[8:MIN_PACKET_LEN], uint32(l))
 	i := MIN_PACKET_LEN
-	if req.Handle != "" {
-		hi := len(req.Handle) + i
-		copy(data[i:hi], []byte(req.Handle))
-		if req.DataType != WORK_FAIL {
+	if outpack.handle != "" {
+		hi := len(outpack.handle) + i
+		copy(data[i:hi], []byte(outpack.handle))
+		if outpack.dataType != WORK_FAIL {
 			data[hi] = '\x00'
 		}
 		i = i + hi
 	}
-	copy(data[i:], req.Data)
+	copy(data[i:], outpack.data)
 	return
 }
diff --git a/worker/worker.go b/worker/worker.go
index ed9dfc9..6b935e7 100644
--- a/worker/worker.go
+++ b/worker/worker.go
@@ -39,7 +39,7 @@ func foobar(job *Job) (data []byte, err os.Error) {
 type Worker struct {
 	agents  map[string]*agent
 	funcs   JobFuncs
-	in      chan *Response
+	in      chan *inPack
 	running bool
 	limit   chan bool
 
@@ -55,7 +55,7 @@ func New(l int) (worker *Worker) {
 	worker = &Worker{
 		agents: make(map[string]*agent, QUEUE_SIZE),
 		funcs:  make(JobFuncs),
-		in:     make(chan *Response, QUEUE_SIZE),
+		in:     make(chan *inPack, QUEUE_SIZE),
 	}
 	if l != Unlimited {
 		worker.limit = make(chan bool, l)
@@ -85,9 +85,9 @@ func (worker *Worker) AddServer(net, addr string) (err error) {
 // Write a job to job server.
 // Here, the job's mean is not the oraginal mean.
 // Just looks like a network package for job's result or tell job server, there was a fail.
-func (worker *Worker) broadcast(req *request) {
+func (worker *Worker) broadcast(outpack *outPack) {
 	for _, v := range worker.agents {
-		v.write(req)
+		v.write(outpack)
 	}
 }
 
@@ -110,19 +110,19 @@ func (worker *Worker) AddFunc(funcname string,
 
 // inner add function
 func (worker *Worker) addFunc(funcname string, timeout uint32) {
-	req := getRequest()
+	outpack := getOutPack()
 	if timeout == 0 {
-		req.DataType = CAN_DO
-		req.Data = []byte(funcname)
+		outpack.dataType = CAN_DO
+		outpack.data = []byte(funcname)
 	} else {
-		req.DataType = CAN_DO_TIMEOUT
+		outpack.dataType = CAN_DO_TIMEOUT
 		l := len(funcname)
-		req.Data = getBuffer(l + 5)
-		copy(req.Data, []byte(funcname))
-		req.Data[l] = '\x00'
-		binary.BigEndian.PutUint32(req.Data[l + 1:], timeout)
+		outpack.data = getBuffer(l + 5)
+		copy(outpack.data, []byte(funcname))
+		outpack.data[l] = '\x00'
+		binary.BigEndian.PutUint32(outpack.data[l + 1:], timeout)
 	}
-	worker.broadcast(req)
+	worker.broadcast(outpack)
 }
 
 // Remove a function.
@@ -141,27 +141,27 @@ func (worker *Worker) RemoveFunc(funcname string) (err error) {
 
 // inner remove function
 func (worker *Worker) removeFunc(funcname string) {
-	req := getRequest()
-	req.DataType = CANT_DO
-	req.Data = []byte(funcname)
-	worker.broadcast(req)
+	outpack := getOutPack()
+	outpack.dataType = CANT_DO
+	outpack.data = []byte(funcname)
+	worker.broadcast(outpack)
 }
 
-func (worker *Worker) dealResp(resp *Response) {
+func (worker *Worker) handleInPack(inpack *inPack) {
 	defer func() {
 		if worker.running && worker.limit != nil {
 			<-worker.limit
 		}
 	}()
-	switch resp.DataType {
+	switch inpack.dataType {
 	case ERROR:
-		worker.err(GetError(resp.Data))
+		worker.err(GetError(inpack.data))
 	case JOB_ASSIGN, JOB_ASSIGN_UNIQ:
-		if err := worker.exec(resp); err != nil {
+		if err := worker.exec(inpack); err != nil {
 			worker.err(err)
 		}
 	default:
-		worker.handleResponse(resp)
+		worker.customeHandler(inpack)
 	}
 }
 
@@ -181,22 +181,16 @@ func (worker *Worker) Work() {
 	for funcname, f := range worker.funcs {
 		worker.addFunc(funcname, f.timeout)
 	}
-	var resp *Response
-	for resp = range worker.in {
-		go worker.dealResp(resp)
+	var inpack *inPack
+	for inpack = range worker.in {
+		go worker.handleInPack(inpack)
 	}
 }
 
 // job handler
-func (worker *Worker) handleResponse(resp *Response) {
+func (worker *Worker) customeHandler(inpack *inPack) {
 	if worker.JobHandler != nil {
-		job := getJob()
-		job.a = worker.agents[resp.agentId]
-		job.Handle = resp.Handle
-		if resp.DataType == ECHO_RES {
-			job.data = resp.Data
-		}
-		if err := worker.JobHandler(job); err != nil {
+		if err := worker.JobHandler(inpack); err != nil {
 			worker.err(err)
 		}
 	}
@@ -213,32 +207,32 @@ func (worker *Worker) Close() {
 
 // Send a something out, get the samething back.
 func (worker *Worker) Echo(data []byte) {
-	req := getRequest()
-	req.DataType = ECHO_REQ
-	req.Data = data
-	worker.broadcast(req)
+	outpack := getOutPack()
+	outpack.dataType = ECHO_REQ
+	outpack.data = data
+	worker.broadcast(outpack)
 }
 
 // Remove all of functions.
 // Both from the worker or job servers.
 func (worker *Worker) Reset() {
-	req := getRequest()
-	req.DataType = RESET_ABILITIES
-	worker.broadcast(req)
+	outpack := getOutPack()
+	outpack.dataType = RESET_ABILITIES
+	worker.broadcast(outpack)
 	worker.funcs = make(JobFuncs)
 }
 
 // Set the worker's unique id.
 func (worker *Worker) SetId(id string) {
 	worker.Id = id
-	req := getRequest()
-	req.DataType = SET_CLIENT_ID
-	req.Data = []byte(id)
-	worker.broadcast(req)
+	outpack := getOutPack()
+	outpack.dataType = SET_CLIENT_ID
+	outpack.data = []byte(id)
+	worker.broadcast(outpack)
 }
 
 // Execute the job. And send back the result.
-func (worker *Worker) exec(resp *Response) (err error) {
+func (worker *Worker) exec(inpack *inPack) (err error) {
 	defer func() {
 		if r := recover(); r != nil {
 			if e, ok := r.(error); ok {
@@ -248,34 +242,31 @@ func (worker *Worker) exec(resp *Response) (err error) {
 			}
 		}
 	}()
-	f, ok := worker.funcs[resp.Fn]
+	f, ok := worker.funcs[inpack.fn]
 	if !ok {
-		return fmt.Errorf("The function does not exist: %s", resp.Fn)
+		return fmt.Errorf("The function does not exist: %s", inpack.fn)
 	}
 	var r *result
-	job := getJob()
-	job.a = worker.agents[resp.agentId]
-	job.Handle = resp.Handle
 	if f.timeout == 0 {
-		d, e := f.f(job)
+		d, e := f.f(inpack)
 		r = &result{data: d, err: e}
 	} else {
-		r = execTimeout(f.f, job, time.Duration(f.timeout)*time.Second)
+		r = execTimeout(f.f, inpack, time.Duration(f.timeout)*time.Second)
 	}
-	req := getRequest()
+	outpack := getOutPack()
 	if r.err == nil {
-		req.DataType = WORK_COMPLETE
+		outpack.dataType = WORK_COMPLETE
 	} else {
 		if r.data == nil {
-			req.DataType = WORK_FAIL
+			outpack.dataType = WORK_FAIL
 		} else {
-			req.DataType = WORK_EXCEPTION
+			outpack.dataType = WORK_EXCEPTION
 		}
 		err = r.err
 	}
-	req.Data = r.data
+	outpack.data = r.data
 	if worker.running {
-		job.a.write(req)
+		inpack.a.write(outpack)
 	}
 	return
 }