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/*
* Copyright (c) 2014 Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import com.sun.tools.attach.AttachOperationFailedException;
import com.sun.tools.attach.VirtualMachine;
import java.io.File;
import java.io.FileWriter;
import java.util.Properties;
import java.util.HashMap;
import javax.management.remote.JMXServiceURL;
import javax.management.remote.JMXConnector;
import javax.management.remote.JMXConnectorFactory;
import jdk.testlibrary.ProcessThread;
import jdk.testlibrary.Utils;
/*
* @test
* @summary Test for VirtualMachine.startManagementAgent and VirtualMachine.startLocalManagementAgent
* @library /lib/testlibrary
* @run build Application Shutdown SimpleProvider jdk.testlibrary.*
* @run main StartManagementAgent
*/
/*
* This test is not meant to test all possible configuration parameters to
* the JMX agent, there are other tests for that. This test makes sure it is
* possible to start the agent via attach.
*/
public class StartManagementAgent {
public static void main(String[] args) throws Throwable {
final String pidFile = "StartManagementAgent.Application.pid";
ProcessThread processThread = null;
RunnerUtil.ProcessInfo info = null;
try {
processThread = RunnerUtil.startApplication(pidFile);
info = RunnerUtil.readProcessInfo(pidFile);
runTests(info.pid);
} catch (Throwable t) {
System.out.println("StartManagementAgent got unexpected exception: " + t);
t.printStackTrace();
throw t;
} finally {
// Make sure the Application process is stopped.
RunnerUtil.stopApplication(info.shutdownPort, processThread);
}
}
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("Invalid com.sun.management.jmxremote.port number")) {
throw ex;
}
}
}
private static final String LOCAL_CONNECTOR_ADDRESS_PROP =
"com.sun.management.jmxremote.localConnectorAddress";
private static final int MAX_RETRIES = 10;
public static void runTests(int pid) throws Exception {
VirtualMachine vm = VirtualMachine.attach(""+pid);
try {
basicTests(vm);
testLocalAgent(vm);
// we retry the remote case several times in case the error
// was caused by a port conflict
int i = 0;
boolean success = false;
do {
try {
System.err.println("Trying remote agent. Try #" + i);
testRemoteAgent(vm);
success = true;
} catch(Exception ex) {
System.err.println("testRemoteAgent failed with exception:");
ex.printStackTrace();
System.err.println("Retrying.");
}
i++;
} while(!success && i < MAX_RETRIES);
if (!success) {
throw new Exception("testRemoteAgent failed after " + MAX_RETRIES + " tries");
}
} finally {
vm.detach();
}
}
public static void testLocalAgent(VirtualMachine vm) throws Exception {
Properties agentProps = vm.getAgentProperties();
String address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
if (address != null) {
throw new Exception("Local management agent already started");
}
String result = vm.startLocalManagementAgent();
// try to parse the return value as a JMXServiceURL
new JMXServiceURL(result);
agentProps = vm.getAgentProperties();
address = (String) agentProps.get(LOCAL_CONNECTOR_ADDRESS_PROP);
if (address == null) {
throw new Exception("Local management agent could not be started");
}
}
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");
}
}
private static void tryConnect(int port, boolean shouldSucceed) throws Exception {
String jmxUrlStr =
String.format(
"service:jmx:rmi:///jndi/rmi://localhost:%d/jmxrmi",
port);
JMXServiceURL url = new JMXServiceURL(jmxUrlStr);
HashMap<String, ?> env = new HashMap<>();
boolean succeeded;
try {
JMXConnector c = JMXConnectorFactory.connect(url, env);
c.getMBeanServerConnection();
succeeded = true;
} catch(Exception ex) {
succeeded = false;
}
if (succeeded && !shouldSucceed) {
throw new Exception("Could connect to agent, but should not have been possible");
}
if (!succeeded && shouldSucceed) {
throw new Exception("Could not connect to agent");
}
}
}
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