如何使用JMX连接到localhost jvm上的java程序？ [英] How to connect to a java program on localhost jvm using JMX?

问题描述

我应该使用JMX连接到localhost jvm上的java程序。换句话说，我想开发一个JMX客户端来配置localhost上的java程序。

I should connect to a java program on localhost jvm using JMX. In other words I want to develop a JMX client to config a java program on localhost.

• 不建议使用JConsole！ JConsole不适合，因为它是一般的JMX客户端，对主程序性能有负面影响。

• Don't recommend using JConsole! JConsole is not suitable because it is general JMX client and have negative effect on main program performance.

oracle站点上的示例使用RMIConnector和host：port params但是我不知道：
应该在哪里设置jmx端口？

Samples on oracle site use RMIConnector and host:port params but I don't know: where should set jmx port?

JConsole有一个选项可以通过PID连接到java进程。但我在JMX api中找不到任何PID作为输入参数的方法。

JConsole have an option to connect to java processes by PID. But I don't find any method in JMX api that have PID as input param.

推荐答案

我们使用以下内容以编程方式连接到我们的JMX服务器。您应该使用以下参数运行服务器：

We use something like the following to programatically connect to our JMX servers. You should run your server with something like the following arguments:

-Dcom.sun.management.jmxremote
-Dcom.sun.management.jmxremote.authenticate=false
-Dcom.sun.management.jmxremote.port=1234
-Dcom.sun.management.jmxremote.ssl=false

要绑定到特定地址，您需要添加以下VM参数：

To bind to a particular address you'll need to add the following VM arguments:

-Djava.rmi.server.hostname=A.B.C.D

然后，您可以使用以下JMX客户端代码连接到您的服务器：

Then you can connect to your server using JMX client code like the following:

String host = "localhost";  // or some A.B.C.D
int port = 1234;
String url = "service:jmx:rmi:///jndi/rmi://" + host + ":" + port + "/jmxrmi";
JMXServiceURL serviceUrl = new JMXServiceURL(url);
JMXConnector jmxConnector = JMXConnectorFactory.connect(serviceUrl, null);
try {
   MBeanServerConnection mbeanConn = jmxConnector.getMBeanServerConnection();
   // now query to get the beans or whatever
   Set<ObjectName> beanSet = mbeanConn.queryNames(null, null);
   ...
} finally {
   jmxConnector.close();
}

我们还有代码可以编程方式将自己发布到外部的特定端口VM参数，但这比我想象的要多。

We also have code that can programatically publish itself to a particular port outside of the VM arguments but that's more fu than you need I think.

在连接by pid方面，你需要据我所知，从Java土地使用Java6。我没有使用下面的代码，但似乎有效。

In terms of connecting "by pid", you need to be using Java6 to do it from Java land as far as I know. I've not used the following code but it seems to work.

List<VirtualMachineDescriptor> vms = VirtualMachine.list();
for (VirtualMachineDescriptor desc : vms) {
    VirtualMachine vm;
    try {
        vm = VirtualMachine.attach(desc);
    } catch (AttachNotSupportedException e) {
        continue;
    }
    Properties props = vm.getAgentProperties();
    String connectorAddress =
        props.getProperty("com.sun.management.jmxremote.localConnectorAddress");
    if (connectorAddress == null) {
        continue;
    }
    JMXServiceURL url = new JMXServiceURL(connectorAddress);
    JMXConnector connector = JMXConnectorFactory.connect(url);
    try {
        MBeanServerConnection mbeanConn = connector.getMBeanServerConnection();
        Set<ObjectName> beanSet = mbeanConn.queryNames(null, null);
        ...
    } finally {
        jmxConnector.close();
    }
}

---

我还是 SimpleJMX软件包的作者，它可以轻松启动JMX服务器并将bean发布到远程客户端。

---

I've also the author of SimpleJMX package which makes it easy to start a JMX server and publish beans to remote clients.

// create a new server listening on port 8000
JmxServer jmxServer = new JmxServer(8000);
// start our server
jmxServer.start();
// register our lookupCache object defined below
jmxServer.register(lookupCache);
jmxServer.register(someOtherObject);
// stop our server
jmxServer.stop();

它确实有一个客户端界面，但现在它没有任何查找进程的机制通过PID - 仅支持主机/端口组合（2012年6月）。

It does have a client interface as well but right now it doesn't have any mechanisms to find processes by PID -- only host/port combinations are supported (in 6/2012).

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