org.jolokia.jvmagent.client.command.CommandDispatcher Maven / Gradle / Ivy
package org.jolokia.jvmagent.client.command;
/*
* 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.reflect.InvocationTargetException;
import java.util.*;
import org.jolokia.jvmagent.client.util.OptionsAndArgs;
import org.jolokia.jvmagent.client.util.VirtualMachineHandler;
/**
* Dispatch for various attach commands
*
* @author roland
* @since 12.08.11
*/
@SuppressWarnings({"PMD.SystemPrintln"})
public class CommandDispatcher {
private OptionsAndArgs options;
private static final Map COMMANDS = new HashMap();
// Initialize command objects
static {
for (AbstractBaseCommand command : new AbstractBaseCommand[] {
new StartCommand(),
new StopCommand(),
new ToggleCommand(),
new StatusCommand(),
new ListCommand(),
new EncryptCommand(),
new HelpCommand(),
new VersionCommand()
}) {
COMMANDS.put(command.getName(),command);
}
}
/**
* Dispatcher responsible for the execution of commands
*
* @param pOptions the parsed command line and options
*/
public CommandDispatcher(OptionsAndArgs pOptions) {
options = pOptions;
}
/**
* Dispatch the command
*
* @param pVm the virtual machine to attach to (typeless in order avoid direct references to the sun classes)
* @param pHandler handler for listing processes
* @return the return code (0 or 1)
*/
public int dispatchCommand(Object pVm,VirtualMachineHandler pHandler) throws InvocationTargetException, NoSuchMethodException, IllegalAccessException {
String commandName = options.getCommand();
AbstractBaseCommand command = COMMANDS.get(commandName);
if (command == null) {
throw new IllegalArgumentException("Unknown command '" + commandName + "'");
}
return command.execute(options,pVm,pHandler);
}
/**
* Get the list of available commands
*
* @return set of available commands
*/
public static Set getAvailableCommands() {
return Collections.unmodifiableSet(COMMANDS.keySet());
}
/**
* Print out usage message
*/
public static void printHelp() {
HelpCommand.printUsage();
}
}