/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.shell.proclet;
import java.util.Map;
import java.util.Properties;
import org.jnode.shell.AsyncCommandInvoker;
import org.jnode.shell.Command;
import org.jnode.shell.CommandInvoker;
import org.jnode.shell.CommandLine;
import org.jnode.shell.CommandRunner;
import org.jnode.shell.CommandShell;
import org.jnode.shell.CommandThread;
import org.jnode.shell.CommandThreadImpl;
import org.jnode.shell.ShellException;
import org.jnode.shell.SimpleCommandInvoker;
import org.jnode.shell.io.CommandIO;
import org.jnode.vm.VmSystem;
/**
* This command invoker runs commands in their own proclet, giving each one its
* own standard input / output / error stream, system properties and environment
* variables.
*
* @author crawley@jnode.org
*/
public class ProcletCommandInvoker extends AsyncCommandInvoker implements CommandInvoker {
public static final Factory FACTORY = new Factory() {
public SimpleCommandInvoker create(CommandShell shell) {
return new ProcletCommandInvoker(shell);
}
public String getName() {
return "proclet";
}
};
private static boolean initialized;
public ProcletCommandInvoker(CommandShell commandShell) {
super(commandShell);
init();
}
public String getName() {
return "proclet";
}
public int invoke(CommandLine commandLine, Properties sysProps, Map<String, String> env)
throws ShellException {
CommandRunner cr = setup(commandLine, sysProps, env);
return runIt(commandLine, cr);
}
public CommandThread invokeAsynchronous(CommandLine commandLine, Properties sysProps,
Map<String, String> env) throws ShellException {
CommandRunner cr = setup(commandLine, sysProps, env);
return forkIt(commandLine, cr);
}
protected CommandThreadImpl createThread(CommandRunner cr) {
CommandIO[] ios = cr.getIOs();
return Proclet.createProclet(cr, cr.getSysProps(), cr.getEnv(),
new Object[] {
ios[Command.STD_IN].getInputStream(),
ios[Command.STD_OUT].getPrintStream(),
ios[Command.STD_ERR].getPrintStream()},
cr.getCommandName());
}
private static synchronized void init() {
if (!initialized) {
VmSystem.switchToExternalIOContext(new ProcletIOContext());
initialized = true;
}
}
}