darkstar处理超时，分解Task的方案！

package cn.vicky.sgs.app;import java.io.Serializable;import java.util.Properties;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import cn.vicky.sgs.task.BaseTask;import cn.vicky.sgs.task.impl.TestTask;import com.sun.sgs.app.AppContext;import com.sun.sgs.app.AppListener;import com.sun.sgs.app.ClientSession;import com.sun.sgs.app.ClientSessionListener;import com.sun.sgs.app.util.ScalableList;public class MainApp implements AppListener, Serializable {private static final long serialVersionUID = 1L;private static final Logger logger = LoggerFactory.getLogger(MainApp.class);public void initialize(Properties properties) {logger.info("initialize begin ... ");ScalableList<BaseTask> testTasks = new ScalableList<BaseTask>();// 一个任务需要执行的子任务 ... testTasks.add(new TestTask());testTasks.add(new TestTask());testTasks.add(new TestTask());testTasks.add(new TestTask());testTasks.add(new TestTask());AppContext.getTaskManager().scheduleTask(new TestTask(testTasks));logger.info("initialize over ... ");}public ClientSessionListener loggedIn(ClientSession clientsession) {return null;}}

 

package cn.vicky.sgs.task;import java.io.Serializable;import com.sun.sgs.app.AppContext;import com.sun.sgs.app.ManagedReference;import com.sun.sgs.app.Task;import com.sun.sgs.app.util.ScalableList;public abstract class BaseTask implements Task, Serializable {private static final long serialVersionUID = 1L;private ManagedReference<ScalableList<BaseTask>> subTasksRef;public BaseTask() {}public BaseTask(ScalableList<BaseTask> subTasks) {subTasksRef = AppContext.getDataManager().createReference(subTasks);}public void doSubTask() {if (subTasksRef != null && subTasksRef.get() != null) {BaseTask task = null;try {task = subTasksRef.getForUpdate().remove(0);} catch (IndexOutOfBoundsException e) {}if (task != null) {task.setSubTasksRef(subTasksRef);AppContext.getTaskManager().scheduleTask(task);}}}public void setSubTasksRef(ManagedReference<ScalableList<BaseTask>> subTasksRef) {this.subTasksRef = subTasksRef;}}

 

package cn.vicky.sgs.task.impl;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.sun.sgs.app.AppContext;import com.sun.sgs.app.NameNotBoundException;import com.sun.sgs.app.util.ScalableList;import cn.vicky.sgs.mo.Counter;import cn.vicky.sgs.task.BaseTask;public class TestTask extends BaseTask {private static final long serialVersionUID = 1L;private static final Logger logger = LoggerFactory.getLogger(TestTask.class);public TestTask() {}public TestTask(ScalableList<BaseTask> subTasks) {super(subTasks);}public void run() throws Exception {// Thread.sleep(80);doSubTask();long id = 0;Counter counter = null;try {counter = (Counter) AppContext.getDataManager().getBinding("id");} catch (NameNotBoundException e) {AppContext.getDataManager().setBinding("id", new Counter());counter = (Counter) AppContext.getDataManager().getBinding("id");}id = counter.next();logger.info("Done ~ " + id);}}

 

package cn.vicky.sgs.mo;import java.io.Serializable;import com.sun.sgs.app.AppContext;import com.sun.sgs.app.ManagedObject;public class Counter implements ManagedObject, Serializable {private static final long serialVersionUID = 1L;public long id = 0;public long next() {id++;AppContext.getDataManager().markForUpdate(this);return id;}@Overridepublic String toString() {return "Counter id ::[ " + id + " ]";}}

 

 

打印：：

 

 2010-3-30 16:08:58 com.sun.sgs.impl.kernel.Kernel <init>信息: The Kernel is ready, version: 0.9.112010-3-30 16:08:58 com.sun.sgs.impl.service.data.store.DataStoreImpl <init>信息: Creating database directory : G:/学习/SubTask/data/MainApp/dsdb2010-3-30 16:09:02 com.sun.sgs.impl.service.watchdog.WatchdogServerImpl registerNode信息: node:com.sun.sgs.impl.service.watchdog.NodeImpl[1,health:GREEN,backup:(none)]@12D5D97FF9764F4 registered[10/03/30 16:09:03][cn.vicky.sgs.app.MainApp - initialize] - initialize begin ... [10/03/30 16:09:03][cn.vicky.sgs.app.MainApp - initialize] - initialize over ... 2010-3-30 16:09:03 com.sun.sgs.impl.kernel.Kernel startApplication信息: MainApp: application is ready[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 1[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 2[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 3[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 4[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 5[10/03/30 16:09:03][cn.vicky.sgs.task.impl.TestTask - run] - Done ~ 6