/* * Copyright (C) 2012 eXo Platform SAS. * * This 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 software 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 software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ package org.crsh.shell.impl.command; import org.crsh.keyboard.KeyHandler; import org.crsh.shell.ShellProcess; import org.crsh.shell.ShellProcessContext; import org.crsh.shell.ShellResponse; import java.util.logging.Level; abstract class CRaSHProcess implements ShellProcess { /** . */ protected final CRaSHSession crash; /** . */ protected final String request; /** . */ private volatile Thread thread; /** . */ private volatile boolean cancelled; protected CRaSHProcess(CRaSHSession crash, String request) { this.crash = crash; this.request = request; } public void execute(ShellProcessContext processContext) { ClassLoader previous = crash.setCRaSHLoader(); try { ShellResponse resp; thread = Thread.currentThread(); // String userName = crash.user != null ? crash.user.getName() : "unauthenticated"; CRaSHSession.accessLog.log(Level.FINE, "User " + userName + " executes " + request); // try { try { resp = doInvoke(processContext); if (Thread.interrupted() || cancelled) { throw new InterruptedException("like a goto"); } } catch (InterruptedException e) { // Preserve interrupt status Thread.currentThread().interrupt(); resp = ShellResponse.cancelled(); } } catch (Throwable t) { resp = ShellResponse.internalError("Unexpected error when executing process", t); } finally { thread = null; } // processContext.end(resp); // if (resp instanceof ShellResponse.Error) { ShellResponse.Error error = (ShellResponse.Error)resp; Throwable t = error.getThrowable(); if (t != null) { CRaSHSession.log.log(Level.SEVERE, "Error while evaluating request '" + request + "' " + error.getMessage(), t); } else { CRaSHSession.log.log(Level.SEVERE, "Error while evaluating request '" + request + "' " + error.getMessage()); } } } finally { crash.setPreviousLoader(previous); } } @Override public KeyHandler getKeyHandler() { return null; } abstract ShellResponse doInvoke(ShellProcessContext context) throws InterruptedException; public void cancel() { ClassLoader previous = crash.setCRaSHLoader(); try { Thread t = thread; if (t != null) { t.interrupt(); } cancelled = true; } finally { crash.setPreviousLoader(previous); } } }