Java 在Wicket应用程序中并发运行计时器
是否可以在wicket应用程序中并发运行计时器线程？ 下面是我正在尝试做的示例代码。 在收到一条消息时，我想增加一些延迟，因此我正在运行计时器，但当我启动计时器时，主线程停止，并且在计时器运行期间，我没有收到任何其他消息。 可以和主线程并行运行计时器吗？谢谢Java 在Wicket应用程序中并发运行计时器,java,multithreading,timer,wicket,timertask,Java,Multithreading,Timer,Wicket,Timertask,是否可以在wicket应用程序中并发运行计时器线程？ 下面是我正在尝试做的示例代码。 在收到一条消息时，我想增加一些延迟，因此我正在运行计时器，但当我启动计时器时，主线程停止，并且在计时器运行期间，我没有收到任何其他消息。 可以和主线程并行运行计时器吗？谢谢 public class Test extends WebPage{ private Queue<String> msgQueue; Test(){ msgQueue = new Concurre
public class Test extends WebPage{
private Queue<String> msgQueue;
Test(){
msgQueue = new ConcurrentLinkedQueue<String>();
add( new WebSocketBehavior() {
@Override
protected void onMessage(WebSocketRequestHandler handler,
TextMessage message) {
super.onMessage(handler, message);
handleMessage(handler,message);
}
private void handleMessage(WebSocketRequestHandler handler, TextMessage msg){
msgQueue.add(msg.getText());
Timer timer = new Timer();
Application application = getApplication();
timer.schedule( new TimerTask() {
@Override
public void run() {
if (!Application.exists()) {
ThreadContext.setApplication(application);
}
System.out.println(getApplication());
}
}, 5000);
}
}´
公共类测试扩展网页{
专用队列msgQueue；
测试（）{
msgQueue=新的ConcurrentLinkedQueue（）；
添加（新的WebSocketBehavior（）{
@凌驾
受保护的void onMessage（WebSocketRequestHandler，
短信（短信）{
onMessage（处理程序，消息）；
handleMessage（处理程序、消息）；
}
私有void handleMessage（WebSocketRequestHandler处理程序，TextMessage消息）{
添加（msg.getText（））；
定时器=新定时器（）；
Application=getApplication（）；
timer.schedule（新TimerTask（）{
@凌驾
公开募捐{
如果（！Application.exists（））{
setApplication（应用程序）；
}
System.out.println（getApplication（））；
}
}, 5000);
}
}´
Nov 27, 2016 8:19:10 PM org.apache.wicket.serialize.java.JavaSerializer serialize
SEVERE: Error serializing object class Test [object=[Page class = Test, id = 0, render count = 1]]
org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream$ObjectCheckException: The object type is not Serializable!
A problem occurred while checking object with type: java.util.concurrent.ScheduledThreadPoolExecutor
private final java.util.concurrent.ScheduledExecutorService Test.scheduler [class=java.util.concurrent.ScheduledThreadPoolExecutor] <----- field that is causing the problem
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.internalCheck(CheckingObjectOutputStream.java:362)
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.check(CheckingObjectOutputStream.java:341)
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.checkFields(CheckingObjectOutputStream.java:605)
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.internalCheck(CheckingObjectOutputStream.java:541)
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.check(CheckingObjectOutputStream.java:341)
at org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream.writeObjectOverride(CheckingObjectOutputStream.java:673)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:267)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:344)
at org.apache.wicket.serialize.java.JavaSerializer.serialize(JavaSerializer.java:78)
at org.apache.wicket.pageStore.AbstractPageStore.serializePage(AbstractPageStore.java:133)
at org.apache.wicket.pageStore.DefaultPageStore.createSerializedPage(DefaultPageStore.java:281)
at org.apache.wicket.pageStore.DefaultPageStore.storePage(DefaultPageStore.java:61)
at org.apache.wicket.page.PageStoreManager$PersistentRequestAdapter.storeTouchedPages(PageStoreManager.java:403)
at org.apache.wicket.page.RequestAdapter.commitRequest(RequestAdapter.java:193)
at org.apache.wicket.page.AbstractPageManager.commitRequest(AbstractPageManager.java:76)
at org.apache.wicket.page.PageManagerDecorator.commitRequest(PageManagerDecorator.java:74)
at org.apache.wicket.page.PageAccessSynchronizer$2.commitRequest(PageAccessSynchronizer.java:270)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor$1.onDetach(AbstractWebSocketProcessor.java:297)
at org.apache.wicket.request.cycle.RequestCycleListenerCollection$3.notify(RequestCycleListenerCollection.java:105)
at org.apache.wicket.request.cycle.RequestCycleListenerCollection$3.notify(RequestCycleListenerCollection.java:101)
at org.apache.wicket.util.listener.ListenerCollection$1.notify(ListenerCollection.java:120)
at org.apache.wicket.util.listener.ListenerCollection.reversedNotify(ListenerCollection.java:144)
at org.apache.wicket.util.listener.ListenerCollection.reversedNotifyIgnoringExceptions(ListenerCollection.java:113)
at org.apache.wicket.request.cycle.RequestCycleListenerCollection.onDetach(RequestCycleListenerCollection.java:100)
at org.apache.wicket.request.cycle.RequestCycle.onDetach(RequestCycle.java:649)
at org.apache.wicket.request.cycle.RequestCycle.detach(RequestCycle.java:594)
at org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:297)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor.broadcastMessage(AbstractWebSocketProcessor.java:257)
at org.apache.wicket.protocol.ws.api.AbstractWebSocketProcessor.onConnect(AbstractWebSocketProcessor.java:175)
at org.apache.wicket.protocol.ws.javax.JavaxWebSocketProcessor.<init>(JavaxWebSocketProcessor.java:48)
at org.apache.wicket.protocol.ws.javax.WicketEndpoint.onOpen(WicketEndpoint.java:58)
at org.apache.tomcat.websocket.server.WsHttpUpgradeHandler.init(WsHttpUpgradeHandler.java:129)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:629)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.NotSerializableException: java.util.concurrent.ScheduledThreadPoolExecutor
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1184)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1548)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1509)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
at org.apache.wicket.serialize.java.JavaSerializer$SerializationCheckerObjectOutputStream.writeObjectOverride(JavaSerializer.java:256)
2016年11月27日晚上8:19:10 org.apache.wicket.serialize.java.JavaSerializer serialize
严重：序列化对象类测试时出错[object=[Page class=Test，id=0，render count=1]]
org.apache.wicket.core.util.objects.checker.CheckingObjectOutputStream$ObjectCheckException:对象类型不可序列化！
检查类型为java.util.concurrent.ScheduledThreadPoolExecutor的对象时出现问题
private final java.util.concurrent.ScheduledExecutorService Test.ScheduledExecutorService[class=java.util.concurrent.ScheduledThreadPoolExecutor]您可以使用ScheduledExecutorService
执行调度器任务（在单独的线程中运行），如下所示，并带有内联注释：
public class Test extends WebPage{
//Initialise ScheduledExecutorService thread pool
private final ScheduledExecutorService scheduler =
Executors.newScheduledThreadPool(1);
private Queue<String> msgQueue;
Test(){
msgQueue = new ConcurrentLinkedQueue<String>();
add( new WebSocketBehavior() {
@Override
protected void onMessage(WebSocketRequestHandler handler,
TextMessage message) {
super.onMessage(handler, message);
handleMessage(handler,message);
}
private void handleMessage(WebSocketRequestHandler handler,
TextMessage msg){
msgQueue.add(msg.getText());
Timer timer = new Timer();
final Application application = getApplication();
//Implement Runnable which runs in sep. Thread
Runnable runnable = () -> {
if (!Application.exists()) {
ThreadContext.setApplication(application);
}
};
//Start the scheduler Now which runs for every 5 seconds
ScheduledFuture<V> timer = scheduler.schedule(runnable, 5000, TimeUnit.SECONDS);
//you can check timer.isDone()
}
}
private static void enhancedLoop(int[] numbers) {
//add your code
}
公共类测试扩展网页{
//初始化ScheduledExecutorService线程池
专用最终计划执行器服务计划程序=
Executors.newScheduledThreadPool（1）；
专用队列msgQueue；
测试（）{
msgQueue=新的ConcurrentLinkedQueue（）；
添加（新的WebSocketBehavior（）{
@凌驾
受保护的void onMessage（WebSocketRequestHandler，
短信（短信）{
onMessage（处理程序，消息）；
handleMessage（处理程序、消息）；
}
私有void handleMessage（WebSocketRequestHandler，
短信（msg）{
添加（msg.getText（））；
定时器=新定时器（）；
最终应用程序Application=getApplication（）；
//实现在九月线程中运行的Runnable
Runnable Runnable=（）->{
如果（！Application.exists（））{
setApplication（应用程序）；
}
};
//现在启动每5秒运行一次的计划程序
ScheduledFuture timer=scheduler.schedule（可运行，5000，时间单位为秒）；
//您可以检查timer.isDone（）
}
}
私有静态void enhancedLoop（int[]数字）{
//添加您的代码
}
您可以查找以了解有关ScheduledExecutorService
的更多信息。您可以使用ScheduledExecutorService
执行调度程序任务（在单独的线程中运行），如下图所示，并提供内联注释：
public class Test extends WebPage{
//Initialise ScheduledExecutorService thread pool
private final ScheduledExecutorService scheduler =
Executors.newScheduledThreadPool(1);
private Queue<String> msgQueue;
Test(){
msgQueue = new ConcurrentLinkedQueue<String>();
add( new WebSocketBehavior() {
@Override
protected void onMessage(WebSocketRequestHandler handler,
TextMessage message) {
super.onMessage(handler, message);
handleMessage(handler,message);
}
private void handleMessage(WebSocketRequestHandler handler,
TextMessage msg){
msgQueue.add(msg.getText());
Timer timer = new Timer();
final Application application = getApplication();
//Implement Runnable which runs in sep. Thread
Runnable runnable = () -> {
if (!Application.exists()) {
ThreadContext.setApplication(application);
}
};
//Start the scheduler Now which runs for every 5 seconds
ScheduledFuture<V> timer = scheduler.schedule(runnable, 5000, TimeUnit.SECONDS);
//you can check timer.isDone()
}
}
private static void enhancedLoop(int[] numbers) {
//add your code
}
公共类测试扩展网页{
//初始化ScheduledExecutorService线程池
专用最终计划执行器服务计划程序=
Executors.newScheduledThreadPool（1）；
专用队列msgQueue；
测试（）{
msgQueue=新的ConcurrentLinkedQueue（）；
添加（新的WebSocketBehavior（）{
@凌驾
受保护的void onMessage（WebSocketRequestHandler，
短信（短信）{
onMessage（处理程序，消息）；
handleMessage（处理程序、消息）；
}
私有void handleMessage（WebSocketRequestHandler，
短信（msg）{
添加（msg.getText（））；
定时器=新定时器（）；
最终应用程序Application=getApplication（）；
//实现在九月线程中运行的Runnable
Runnable Runnable=（）->{
如果（！Application.exists（））{
setApplication（应用程序）；
}
};
//现在启动每5秒运行一次的计划程序
ScheduledFuture timer=scheduler.schedule（可运行，5000，时间单位为秒）；
//您可以检查timer.isDone（）
}
}
私有静态void enhancedLoop（int[]数字）{
//添加您的代码
}
您可以查找以了解有关ScheduledExecutorService的更多信息。DR:将计划程序移动到YourApplication.java并公开API以计划任务。无论如何，每页都不需要计划程序
有关更多详细信息，请阅读本文：
请参见TL；DR：将计划程序移动到YourApplication.java中，并公开API以计划任务。无论如何，每页都不需要计划程序
有关更多详细信息，请阅读本文：
请参见我尝试使用ScheduledExecutorService线程池，但我得到了java.io.NotSerializableException异常。您能帮忙吗？您可以在我的问题中查看日志