001/*
002 * (C) Copyright 2006-2010 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     bstefanescu
018 */
019package org.nuxeo.shell.cmds;
020
021import java.io.PrintWriter;
022import java.io.StringWriter;
023
024import org.nuxeo.shell.Command;
025import org.nuxeo.shell.Context;
026import org.nuxeo.shell.Shell;
027
028/**
029 * @author <a href="mailto:[email protected]">Bogdan Stefanescu</a>
030 */
031@Command(name = "trace", help = "Print the last error stack trace if any")
032public class Trace implements Runnable {
033
034    @Context
035    protected Shell shell;
036
037    public void run() {
038        Throwable t = (Throwable) shell.getProperty("last.error");
039        if (t != null) {
040            shell.getConsole().println();
041            shell.getConsole().println(getStackTrace(t));
042        } else {
043            shell.getConsole().println("No stack trace to print");
044        }
045    }
046
047    public static String getStackTrace(Throwable t) {
048        StringWriter sw = new StringWriter();
049        PrintWriter pw = new PrintWriter(sw);
050        t.printStackTrace(pw);
051        if (t.getCause() != null && t.getCause().getClass().getName().endsWith(".RemoteException")) {
052            pw.println("Dumping remote stack trace:");
053            t.getCause().printStackTrace(pw);
054        }
055        pw.close();
056        return sw.getBuffer().toString();
057    }
058}