package org.jolokia.jvmagent.client.util;
/*
* Copyright 2009-2013 Roland Huss
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;
import org.jolokia.jvmagent.client.command.CommandDispatcher;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import static org.testng.Assert.*;
/**
* @author roland
* @since 12.08.11
*/
@Test(groups = "java6")
public class VirtualMachineHandlerTest {
VirtualMachineHandler vmHandler;
@BeforeTest
public void setup() {
OptionsAndArgs o = new OptionsAndArgs(CommandDispatcher.getAvailableCommands(),new String[0]);
vmHandler = new VirtualMachineHandler(o);
}
@Test
public void simple() throws ClassNotFoundException {
Class clazz = ToolsClassFinder.lookupClass("com.sun.tools.attach.VirtualMachine");
assertEquals(clazz.getName(),"com.sun.tools.attach.VirtualMachine");
}
@Test
public void emptyPid() {
assertNull(vmHandler.attachVirtualMachine());
}
@Test
public void listAndAttach() throws Exception, NoSuchMethodException, IllegalAccessException {
List<ProcessDescription> procs = vmHandler.listProcesses();
assertTrue(procs.size() > 0);
boolean foundAtLeastOne = false;
for (ProcessDescription p : procs) {
try {
foundAtLeastOne |= tryAttach(p.getId());
} catch (Exception exp) {
System.err.println("ERROR: " + p.getId() + " " + p.getDisplay() + ": " + exp);
}
}
assertTrue(foundAtLeastOne);
}
@Test
public void findProcess() throws Exception, NoSuchMethodException, IllegalAccessException {
List<ProcessDescription> procs = filterOwnProcess(vmHandler.listProcesses());
for (ProcessDescription desc : procs) {
try {
if (desc.getDisplay() != null && desc.getDisplay().length() > 0) {
Pattern singleHitPattern = Pattern.compile("^" + Pattern.quote(desc.getDisplay()) + "$");
assertTrue(tryAttach(singleHitPattern.pattern()));
break;
}
} catch (Exception exp) {
// We ignore error which happen spuriously
System.out.println("Cannot attach to " + desc.getDisplay() + " (" + desc.getId() + "): " + exp);
exp.printStackTrace();
}
}
assertFalse(tryAttach("RobertMakClaudioPizarro",".*No.*process.*"));
if (procs.size() >= 2) {
assertFalse(tryAttach(".",procs.get(0).getId()));
}
}
private List<ProcessDescription> filterOwnProcess(List<ProcessDescription> pProcessDescs) {
List<ProcessDescription> ret = new ArrayList<ProcessDescription>();
String ownId = getOwnProcessId();
for (ProcessDescription desc : pProcessDescs) {
if (!desc.getId().equals(ownId)) {
ret.add(desc);
break; }
}
return ret;
}
private String getOwnProcessId() {
String name = ManagementFactory.getRuntimeMXBean().getName();
int endIdx = name.indexOf('@');
return endIdx != -1 ? name.substring(0,endIdx) : name;
}
private boolean tryAttach(String pId,String ... expMsg) throws Exception {
OptionsAndArgs o = new OptionsAndArgs(CommandDispatcher.getAvailableCommands(),"start", pId);
VirtualMachineHandler h = new VirtualMachineHandler(o);
Object vm = null;
try {
vm = h.attachVirtualMachine();
return true;
} catch (Exception exp) {
if (expMsg.length > 0) {
assertTrue(exp.getMessage().matches(expMsg[0]) || exp.getCause().getMessage().matches(expMsg[0]));
} else {
throw exp;
}
} finally {
if (vm != null) {
h.detachAgent(vm);
}
}
return false;
}
}