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Jolokia.java
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Jolokia.java
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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*/
package org.apache.camel.dsl.jbang.core.commands.process;
import java.util.List;
import org.apache.camel.dsl.jbang.core.commands.CamelJBangMain;
import org.jolokia.jvmagent.client.command.CommandDispatcher;
import org.jolokia.jvmagent.client.util.OptionsAndArgs;
import org.jolokia.jvmagent.client.util.PlatformUtils;
import org.jolokia.jvmagent.client.util.VirtualMachineHandlerOperations;
import picocli.CommandLine;
import picocli.CommandLine.Command;
@Command(name = "jolokia", description = "Attach Jolokia JVM Agent to a running Camel integration", sortOptions = false)
public class Jolokia extends ProcessBaseCommand {
@CommandLine.Parameters(description = "Name or pid of running Camel integration", arity = "1")
String name;
@CommandLine.Option(names = { "--stop" },
description = "Stops the Jolokia JVM Agent in the running Camel integration")
boolean stop;
private volatile long pid;
public Jolokia(CamelJBangMain main) {
super(main);
}
@Override
public Integer doCall() throws Exception {
List<Long> pids = findPids(name);
if (pids.isEmpty()) {
return 0;
} else if (pids.size() > 1) {
printer().println("Name or pid " + name + " matches " + pids.size()
+ " running Camel integrations. Specify a name or PID that matches exactly one.");
return 0;
}
this.pid = pids.get(0);
int exitCode;
try {
OptionsAndArgs options;
if (stop) {
options = new OptionsAndArgs(null, "stop", Long.toString(pid));
} else {
// find a new free port to use when starting a new connection
long port = AvailablePortFinder.getNextAvailable(8778, 10000);
options = new OptionsAndArgs(
null, "--port", Long.toString(port), "--discoveryEnabled", "true", "start", Long.toString(pid));
}
VirtualMachineHandlerOperations vmHandler = PlatformUtils.createVMAccess(options);
CommandDispatcher dispatcher = new CommandDispatcher(options);
Object vm = options.needsVm() ? vmHandler.attachVirtualMachine() : null;
try {
exitCode = dispatcher.dispatchCommand(vm, vmHandler);
} finally {
if (vm != null) {
vmHandler.detachAgent(vm);
}
}
} catch (Exception e) {
System.err.println("Cannot execute jolokia command due: " + e.getMessage());
exitCode = 1;
}
return exitCode;
}
/**
* The pid of the running Camel integration that was discovered and used
*/
long getPid() {
return pid;
}
}