Java同步代码转异步代码
Kagula
2009-11-18
摘要
Thread Thread Group
概要
利用Java源码，介绍同步代码转异步代码框架的使用，下半部份附框架源代码，阅读本文之前可以参考《Java多线程_编程模型研究》http://blog.csdn.net/lee353086/archive/2008/01/10/2033587.aspx
正文
TestThreads.java源码 用来示范异步调用
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import kagula.multithread.MsgManagement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class testThreads {
private static Log log = LogFactory.getLog(testThreads.class);
static public void main(String args[])
{
log.debug("-Test thread.begin!");
try
{
Object lockMain=new Object(); //用来锁住主线程，可以用来等待branch thread返回运算结果。
MsgManagement mm=new MsgManagement("MsgProc1",lockMain); //MsgManagement的实例化
String sTN =mm.invoke("t_main",new Class[] {String.class},new Object[] {new String("FirstT")});
String sTN2 =mm.invoke("t_main",new Class[] {String.class},new Object[] {new String("SecondT")});
log.debug("sTN="+sTN+" sTN2="+sTN2);
if(mm.activeCount()>0) {
mm.setMaxPriority(Thread.MAX_PRIORITY);
synchronized(lockMain)
{
lockMain.wait(100);
}
mm.interrupt();
}
log.debug("mm.getResult(sTN) "+mm.getResult(sTN));
log.debug("mm.getResult(sTN2) "+mm.getResult(sTN2));
}catch(Exception ex)
{
ex.printStackTrace();
}
log.debug("-Test thread.end!");
}
}
import kagula.multithread.MsgManagement;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
public class testThreads {
private static Log log = LogFactory.getLog(testThreads.class);
static public void main(String args[])
{
log.debug("-Test thread.begin!");
try
{
Object lockMain=new Object(); //用来锁住主线程，可以用来等待branch thread返回运算结果。
MsgManagement mm=new MsgManagement("MsgProc1",lockMain); //MsgManagement的实例化
String sTN =mm.invoke("t_main",new Class[] {String.class},new Object[] {new String("FirstT")});
String sTN2 =mm.invoke("t_main",new Class[] {String.class},new Object[] {new String("SecondT")});
log.debug("sTN="+sTN+" sTN2="+sTN2);
if(mm.activeCount()>0) {
mm.setMaxPriority(Thread.MAX_PRIORITY);
synchronized(lockMain)
{
lockMain.wait(100);
}
mm.interrupt();
}
log.debug("mm.getResult(sTN) "+mm.getResult(sTN));
log.debug("mm.getResult(sTN2) "+mm.getResult(sTN2));
}catch(Exception ex)
{
ex.printStackTrace();
}
log.debug("-Test thread.end!");
}
}
MsgManagement.java Original Thread.java源码 ，是异步框架
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package kagula.multithread;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* 线程管理器
*
* Requirement: JDK1.6.x or above
*
* @author Jun Li
*
*/
public class MsgManagement extends ThreadGroup{
protected static Log log = LogFactory.getLog(MsgManagement.class);
private int nID=1; //auxiliary thread counter flag
private Map mapResults=Collections.synchronizedMap(new HashMap()); //store threads processing result.
private Object lockMain;
// -----------------below methods using only by main callers.begin-----------------
public MsgManagement(String strGroupName,Object pLock)
{
//Initialization the attributes
super(strGroupName);
lockMain=pLock;
}
/**
* After send processing request,will be return soon.
* @param msg
* Message
* @param nParam
* First Parameter
* @param secondParam
* Second Parameter
* @return
*/
public synchronized String invoke(String pMethodName,Class pClass[],Object pObject[]) throws Exception
{
return invoke(pMethodName,pClass,pObject,lockMain);
}
public synchronized String invoke(String pMethodName,Class pClass[],Object pObject[],Object pLock) throws Exception
{
String strThreadName=new String("MsgManagement's No."+nID+" thread");
MyThread thread=new MyThread(this,strThreadName);
thread.setLockMain(pLock);
thread.setMethodName(pMethodName);
thread.setClassParams(pClass);
thread.setObjParams(pObject);
thread.start();
nID++;
return strThreadName;
}
/**
* Get result by thread name
* @param pThreadName
* @return
*/
public Object getResult(String pThreadName)
{
return mapResults.get(pThreadName);
}
// -----------------above methods using only by main callers.end-----------------
//-----------------below methods using only by threads.begin-----------------
public void setNResult(String pName,Object pObj)
{
mapResults.put(pName, pObj);
}
// -----------------above methods using only by threads.begin-----------------
}
package kagula.multithread;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* 线程管理器
*
* Requirement: JDK1.6.x or above
*
* @author Jun Li
*
*/
public class MsgManagement extends ThreadGroup{
protected static Log log = LogFactory.getLog(MsgManagement.class);
private int nID=1; //auxiliary thread counter flag
private Map mapResults=Collections.synchronizedMap(new HashMap()); //store threads processing result.
private Object lockMain;
// -----------------below methods using only by main callers.begin-----------------
public MsgManagement(String strGroupName,Object pLock)
{
//Initialization the attributes
super(strGroupName);
lockMain=pLock;
}
/**
* After send processing request,will be return soon.
* @param msg
* Message
* @param nParam
* First Parameter
* @param secondParam
* Second Parameter
* @return
*/
public synchronized String invoke(String pMethodName,Class pClass[],Object pObject[]) throws Exception
{
return invoke(pMethodName,pClass,pObject,lockMain);
}
public synchronized String invoke(String pMethodName,Class pClass[],Object pObject[],Object pLock) throws Exception
{
String strThreadName=new String("MsgManagement's No."+nID+" thread");
MyThread thread=new MyThread(this,strThreadName);
thread.setLockMain(pLock);
thread.setMethodName(pMethodName);
thread.setClassParams(pClass);
thread.setObjParams(pObject);
thread.start();
nID++;
return strThreadName;
}
/**
* Get result by thread name
* @param pThreadName
* @return
*/
public Object getResult(String pThreadName)
{
return mapResults.get(pThreadName);
}
// -----------------above methods using only by main callers.end-----------------
//-----------------below methods using only by threads.begin-----------------
public void setNResult(String pName,Object pObj)
{
mapResults.put(pName, pObj);
}
// -----------------above methods using only by threads.begin-----------------
}
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package kagula.multithread;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Your object need derived from it to implement asynchronous method!
* @author Lijun
*
*/
public abstract class OriginalThread extends Thread{
protected static Log log = LogFactory.getLog(OriginalThread.class);
protected String MethodName=new String("default");
protected Object objParams[];
protected Class classParams[];
protected Object lockMain;
public OriginalThread(ThreadGroup tg,String name)
{
super(tg,name);
}
public void run()
{
log.debug("["+getName()+"] instance of OriginalThread: Before Invoke the method ["+MethodName+"]");
Method method=null;
Object objR=null;
try {
method=this.getClass().getMethod(MethodName, classParams);
}catch(NoSuchMethodException e)
{
log.error(e.toString());
return;
}
if(method!=null)
{
try {
objR=method.invoke(this, objParams);
}catch(IllegalAccessException e)
{
log.error(e.toString());
return;
}catch(InvocationTargetException e)
{
log.error(e.toString());
return;
}catch(IllegalArgumentException e)
{
log.error(e);
return;
}
catch(Exception e)
{
log.error(e);
return;
}
}
log.debug("["+getName()+"] instance of OriginalThread: After Invoke the method ["+MethodName+"] return value is ["+objR+"]");
setNResult(objR); //put setNResult before setNFlag,because assure after nFlag==SUCCESS,caller will get proper result!
synchronized(lockMain) {
lockMain.notifyAll();
}
}
//---------------------below methods only should be used by MsgManagement---------------------
private void setNResult(Object pObj)
{
MsgManagement mm=(MsgManagement)this.getThreadGroup();
mm.setNResult(this.getName(), pObj);
}
public void setMethodName(String pMethodName) {
this.MethodName = pMethodName;
}
public void setObjParams(Object[] objParams) {
this.objParams = objParams;
}
public void setClassParams(Class[] classParams) {
this.classParams = classParams;
}
public void setLockMain(Object pLock)
{
lockMain=pLock;
}
}
package kagula.multithread;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* Your object need derived from it to implement asynchronous method!
* @author Lijun
*
*/
public abstract class OriginalThread extends Thread{
protected static Log log = LogFactory.getLog(OriginalThread.class);
protected String MethodName=new String("default");
protected Object objParams[];
protected Class classParams[];
protected Object lockMain;
public OriginalThread(ThreadGroup tg,String name)
{
super(tg,name);
}
public void run()
{
log.debug("["+getName()+"] instance of OriginalThread: Before Invoke the method ["+MethodName+"]");
Method method=null;
Object objR=null;
try {
method=this.getClass().getMethod(MethodName, classParams);
}catch(NoSuchMethodException e)
{
log.error(e.toString());
return;
}
if(method!=null)
{
try {
objR=method.invoke(this, objParams);
}catch(IllegalAccessException e)
{
log.error(e.toString());
return;
}catch(InvocationTargetException e)
{
log.error(e.toString());
return;
}catch(IllegalArgumentException e)
{
log.error(e);
return;
}
catch(Exception e)
{
log.error(e);
return;
}
}
log.debug("["+getName()+"] instance of OriginalThread: After Invoke the method ["+MethodName+"] return value is ["+objR+"]");
setNResult(objR); //put setNResult before setNFlag,because assure after nFlag==SUCCESS,caller will get proper result!
synchronized(lockMain) {
lockMain.notifyAll();
}
}
//---------------------below methods only should be used by MsgManagement---------------------
private void setNResult(Object pObj)
{
MsgManagement mm=(MsgManagement)this.getThreadGroup();
mm.setNResult(this.getName(), pObj);
}
public void setMethodName(String pMethodName) {
this.MethodName = pMethodName;
}
public void setObjParams(Object[] objParams) {
this.objParams = objParams;
}
public void setClassParams(Class[] classParams) {
this.classParams = classParams;
}
public void setLockMain(Object pLock)
{
lockMain=pLock;
}
}
MyThread.java是，你同步代码存放的地方
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package kagula.multithread;
import org.apache.commons.logging.LogFactory;
public class MyThread extends OriginalThread{
public MyThread(ThreadGroup tg,String name)
{
super(tg,name);
log=LogFactory.getLog(this.getClass());
}
public String t_main(String sT)
{
final long nWaitTime=1*1*5*1000; //H*M*S,once,more than nWaitTime hours
String s=null;;
try{
log.debug("before sleep "+sT);
sleep(nWaitTime);
log.debug("after sleep "+sT);
s="I will return. "+sT;
return s;
}catch(InterruptedException e)
{
log.error("kagula("+getId()+"):"+e.toString());
}
return s;
}
}
