public void export() {
try {
// 创建一个MBeanServer
MBeanServer mbs = MBeanServerFactory.createMBeanServer(DOMAIN);
// MBeanServer mbs = MBeanServerFactory.createMBeanServer();//不能在jconsole中使用
// MBeanServer mbs = ManagementFactory.getPlatformMBeanServer();//可在jconsole中使用
// 用MBeanServer注册LoginStatsMBean
// MBeanServer.registerMBean(Object，ObjectName)方法使用的参数有两个：一个是MBean实现的一个实例；另一个是类型ObjectName的一个对象-它用于唯一地标识该MBean
mbs.registerMBean(new Status(), new ObjectName(MBeanName));
// 存取该JMX服务的URL：
JMXServiceURL url =
new JMXServiceURL("rmi", HOST, JMX_PORT, "/jndi/rmi://" + HOST + ":" + 1099 + "/app");
// start()和stop()来启动和停止 JMXConnectorServer
JMXConnectorServer jmxServer =
JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
serviceUrl = url.toString();
// 在RMI上注册
LocateRegistry.createRegistry(JMX_PORT);
jmxServer.start();
// 创建适配器，用于能够通过浏览器访问MBean
// HtmlAdaptorServer adapter = new HtmlAdaptorServer();
// adapter.setPort(9797);
// mbs.registerMBean(adapter, new ObjectName(
// "MyappMBean:name=htmladapter,port=9797"));
// adapter.start();
} catch (Exception e) {
e.printStackTrace();
}
}
public class DeadLockTest {
private static final String[] protocols = {"rmi", "iiop", "jmxmp"};
private static final MBeanServer mbs = MBeanServerFactory.createMBeanServer();
public static void main(String[] args) {
System.out.println(">>> test on a client notification deadlock.");
boolean ok = true;
for (int i = 0; i < protocols.length; i++) {
try {
test(protocols[i]);
} catch (Exception e) {
System.out.println(">>> Test failed for " + protocols[i]);
e.printStackTrace(System.out);
}
}
System.out.println(">>> Test passed");
}
private static void test(String proto) throws Exception {
System.out.println(">>> Test for protocol " + proto);
JMXServiceURL u = null;
JMXConnectorServer server = null;
HashMap env = new HashMap(2);
// server will close a client connection after 1 second
env.put("jmx.remote.x.server.connection.timeout", "1000");
// disable the client ping
env.put("jmx.remote.x.client.connection.check.period", "0");
try {
u = new JMXServiceURL(proto, null, 0);
server = JMXConnectorServerFactory.newJMXConnectorServer(u, env, mbs);
} catch (MalformedURLException e) {
System.out.println(">>> Skipping unsupported URL " + proto);
}
server.start();
JMXServiceURL addr = server.getAddress();
long st = 2000;
MyListener myListener;
// a cycle to make sure that we test the blocking problem.
do {
JMXConnector client = JMXConnectorFactory.connect(addr, env);
MBeanServerConnection conn = client.getMBeanServerConnection();
myListener = new MyListener(conn);
client.addConnectionNotificationListener(myListener, null, null);
// wait the server to close the client connection
Thread.sleep(st);
// makes the listener to do a remote request via the connection
// which should be closed by the server.
conn.getDefaultDomain();
// allow the listner to have time to work
Thread.sleep(100);
// get a closed notif, should no block.
client.close();
Thread.sleep(100);
st += 2000;
} while (!myListener.isDone());
server.stop();
}
private static class MyListener implements NotificationListener {
public MyListener(MBeanServerConnection conn) {
this.conn = conn;
}
public void handleNotification(Notification n, Object h) {
if (n instanceof JMXConnectionNotification) {
JMXConnectionNotification jcn = (JMXConnectionNotification) n;
final String type = jcn.getType();
System.out.println(">>> The listener receives notif with the type:" + type);
if (JMXConnectionNotification.CLOSED.equals(type)
|| JMXConnectionNotification.FAILED.equals(type)) {
synchronized (this) {
done = false;
}
try {
conn.getDefaultDomain();
} catch (IOException ioe) {
// Greate !
}
synchronized (this) {
done = true;
}
System.out.println(">>> The listener is not blocked!");
}
}
}
public boolean isDone() {
synchronized (this) {
return done;
}
}
private boolean done = false;
private MBeanServerConnection conn;
}
}
/** Constructs a Server object. Creates a new MBeanServer. */
public Server() {
mbs = MBeanServerFactory.createMBeanServer();
}