import com.sun.tools.attach.AttachOperationFailedException; //导入依赖的package包/类
private static void basicTests(VirtualMachine vm) throws Exception {

        // Try calling with null argument
        boolean exception = false;
        try {
            vm.startManagementAgent(null);
        } catch (NullPointerException e) {
            exception = true;
        }
        if (!exception) {
            throw new Exception("startManagementAgent(null) should throw NPE");
        }

        // Try calling with a property value with a space in it
        Properties p = new Properties();
        File f = new File("file with space");
        try (FileWriter fw = new FileWriter(f)) {
            fw.write("com.sun.management.jmxremote.port=apa");
        }
        p.put("com.sun.management.config.file", f.getAbsolutePath());
        try {
            vm.startManagementAgent(p);
        } catch(AttachOperationFailedException ex) {
            // We expect parsing of "apa" above to fail, but if the file path
            // can't be read we get a different exception message
            if (!ex.getMessage().contains("java.lang.NumberFormatException")) {
                throw ex;
            }
        }
    }
 

import com.sun.tools.attach.AttachOperationFailedException; //导入依赖的package包/类
public static void testRemoteAgent(VirtualMachine vm) throws Exception {
    int port = Utils.getFreePort();

    // try to connect - should fail
    tryConnect(port, false);

    // start agent
    System.out.println("Starting agent on port: " + port);
    Properties mgmtProps = new Properties();
    mgmtProps.put("com.sun.management.jmxremote.port", port);
    mgmtProps.put("com.sun.management.jmxremote.authenticate", "false");
    mgmtProps.put("com.sun.management.jmxremote.ssl", "false");
    vm.startManagementAgent(mgmtProps);

    // try to connect - should work
    tryConnect(port, true);

    // try to start again - should fail
    boolean exception = false;
    try {
        vm.startManagementAgent(mgmtProps);
    } catch(AttachOperationFailedException ex) {
        // expected
        exception = true;
    }
    if (!exception) {
        throw new Exception("Expected the second call to vm.startManagementAgent() to fail");
    }
}
 

import com.sun.tools.attach.AttachOperationFailedException; //导入依赖的package包/类
private boolean setFlagAttach(HotSpotVirtualMachine vm, String flagName, String flagValue) throws Exception {
    boolean result;

    try {
        vm.setFlag(flagName, flagValue);
        result = true;
    } catch (AttachOperationFailedException e) {
        result = false;
    }

    return result;
}
 

import com.sun.tools.attach.AttachOperationFailedException; //导入依赖的package包/类
private static void basicTests(VirtualMachine vm) throws Exception {

        // Try calling with null argument
        boolean exception = false;
        try {
            System.out.println("Starting management agent with null");
            vm.startManagementAgent(null);
        } catch (NullPointerException e) {
            exception = true;
        }
        if (!exception) {
            throw new Exception("startManagementAgent(null) should throw NPE");
        }

        // Try calling with a property value with a space in it
        Properties p = new Properties();
        File f = new File("file with space");
        try (FileWriter fw = new FileWriter(f)) {
            fw.write("com.sun.management.jmxremote.port=apa");
        }
        p.put("com.sun.management.config.file", f.getAbsolutePath());
        try {
            System.out.println("Starting management agent with bogus port");
            vm.startManagementAgent(p);
        } catch(AttachOperationFailedException ex) {
            // We expect parsing of "apa" above to fail, but if the file path
            // can't be read we get a different exception message
            if (!ex.getMessage().contains("Invalid com.sun.management.jmxremote.port number")) {
                throw ex;
            }
            ex.printStackTrace(System.err);
        } catch (Throwable t) {
            t.printStackTrace(System.err);
            throw t;
        }
    }
 

import com.sun.tools.attach.AttachOperationFailedException; //导入依赖的package包/类
public static void testRemoteAgent(VirtualMachine vm) throws Exception {
    int port = Utils.getFreePort();

    // try to connect - should fail
    tryConnect(port, false);

    // start agent
    System.out.println("Starting agent on port: " + port);
    Properties mgmtProps = new Properties();
    mgmtProps.put("com.sun.management.jmxremote.port", port);
    mgmtProps.put("com.sun.management.jmxremote.authenticate", "false");
    mgmtProps.put("com.sun.management.jmxremote.ssl", "false");

    System.err.println("Starting management agent ...");
    vm.startManagementAgent(mgmtProps);
    System.err.println("Started");

    // try to connect - should work
    tryConnect(port, true);

    // try to start again - should fail
    boolean exception = false;
    try {
        System.err.println("Starting management agent second time ...");
        vm.startManagementAgent(mgmtProps);
        System.err.println("Started");
    } catch(AttachOperationFailedException ex) {
        // expected
        System.err.println("Got expected exception: " + ex.getMessage());
        exception = true;
    }
    if (!exception) {
        throw new Exception("Expected the second call to vm.startManagementAgent() to fail");
    }
}