我正在尝试编写一个测试用例，它创建一个套接字并连接到一个嵌入式jetty实例。我正在使用
使用websocket servlet启动嵌入式jetty服务器似乎工作正常。我从this example获取了一些代码。不过这一行
...
container.connectToServer(SocketClient.class, uri);
...
抛出此异常
java.io.IOException: java.util.concurrent.RejectedExecutionException: org.eclipse.jetty.util.thread.NonBlockingThread@6f7476d
at org.eclipse.jetty.websocket.client.WebSocketClient.initialiseClient(WebSocketClient.java:462)
at org.eclipse.jetty.websocket.client.WebSocketClient.connect(WebSocketClient.java:187)
at org.eclipse.jetty.websocket.jsr356.ClientContainer.connect(ClientContainer.java:135)
at org.eclipse.jetty.websocket.jsr356.ClientContainer.connectToServer(ClientContainer.java:172)
at com.playquickly.socket.SocketClient.connect(SocketClient.java:18)
at com.playquickly.servlet.SocketServletTest.testSocket(SocketServletTest.java:50)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:67)
Caused by: java.util.concurrent.RejectedExecutionException: org.eclipse.jetty.util.thread.NonBlockingThread@6f7476d
at org.eclipse.jetty.util.thread.QueuedThreadPool.execute(QueuedThreadPool.java:361)
at org.eclipse.jetty.io.SelectorManager.execute(SelectorManager.java:122)
at org.eclipse.jetty.io.SelectorManager.doStart(SelectorManager.java:207)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.util.component.ContainerLifeCycle.start(ContainerLifeCycle.java:132)
at org.eclipse.jetty.util.component.ContainerLifeCycle.doStart(ContainerLifeCycle.java:114)
at org.eclipse.jetty.websocket.client.io.ConnectionManager.doStart(ConnectionManager.java:200)
at org.eclipse.jetty.util.component.AbstractLifeCycle.start(AbstractLifeCycle.java:68)
at org.eclipse.jetty.websocket.client.WebSocketClient.initialiseClient(WebSocketClient.java:454)
... 30 more
这是我说明嵌入式jetty服务器的包装器。
public class EmbeddedJetty {
private final Logger LOG = Logger.getLogger(EmbeddedJetty.class.getSimpleName());
private final int port;
private Server server;
public EmbeddedJetty(int port) {
this.port = port;
}
public void start() throws Exception {
server = new Server();
ServerConnector connector = new ServerConnector(server);
connector.setPort(8080);
server.addConnector(connector);
// Setup the basic application "context" for this application at "/"
// This is also known as the handler tree (in jetty speak)
ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
context.setContextPath("/");
server.setHandler(context);
try {
// Initialize javax.websocket layer
ServerContainer wscontainer = WebSocketServerContainerInitializer.configureContext(context);
// Add WebSocket endpoint to javax.websocket layer
wscontainer.addEndpoint(SocketServlet.class);
System.out.println("Begin start");
server.start();
System.out.println("End start");
} catch (Throwable t) {
t.printStackTrace(System.err);
}
}
public void stop() throws Exception {
server.stop();
LOG.info("Jetty server stopped");
}
}
客户端端点
@ClientEndpoint(encoders = {MessageCoder.class}, decoders = {MessageCoder.class})
public class SocketClient {
public static Session connect(URI uri) throws Exception {
WebSocketContainer container = ContainerProvider.getWebSocketContainer();
try {
// Attempt Connect
return container.connectToServer(SocketClient.class, uri);
} finally {
// Force lifecycle stop when done with container.
// This is to free up threads and resources that the
// JSR-356 container allocates. But unfortunately
// the JSR-356 spec does not handle lifecycles (yet)
if (container instanceof LifeCycle) {
((LifeCycle) container).stop();
}
}
}
@OnMessage
public void onMessage(Message msg, Session session) {
System.out.println(session.getId() + ": " + msg.toString());
}
}
和测试
public class SocketServletTest {
private static EmbeddedJetty server;
@ClassRule
public static final ExternalResource integrationServer = new ExternalResource() {
@Override
protected void before() throws Throwable {
System.out.println("Starting...");
server = new EmbeddedJetty(8080);
server.start();
System.out.println("Started");
}
};
@Before
public void setUp() throws Exception {
}
@After
public void shutdown() throws Exception {
server.stop();
}
@Test
public void testSocket() throws Exception {
URI uri = server.getWebsocketUri(SocketServlet.class);
Session s1 = SocketClient.connect(uri);
}
}
答案 0 :(得分：3)
不要混合使用Jetty版本。
这是JSR-356 API设计的一个不幸的副作用。 （客户端实现是根实现，而服务器实现是建立在其上的）
每个JVM初始化Client容器，并根据webapp初始化每个服务器容器。
您的堆栈跟踪不是您指定的Jetty 9.2.0.RC0（行号已关闭）
他们似乎来自Jetty 9.1.5.v20140505
到处使用Jetty 9.2.2.v20140723。
此外，使用此版本意味着您可以摆脱finally container.stop（）hack。