ErrorHandler.java

/*
 *  This file is part of the Haven & Hearth game client.
 *  Copyright (C) 2009 Fredrik Tolf <fredrik@dolda2000.com>, and
 *                     Björn Johannessen <johannessen.bjorn@gmail.com>
 *
 *  Redistribution and/or modification of this file is subject to the
 *  terms of the GNU Lesser General Public License, version 3, as
 *  published by the Free Software Foundation.
 *
 *  This program 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 General Public License for more details.
 *
 *  Other parts of this source tree adhere to other copying
 *  rights. Please see the file `COPYING' in the root directory of the
 *  source tree for details.
 *
 *  A copy the GNU Lesser General Public License is distributed along
 *  with the source tree of which this file is a part in the file
 *  `doc/LPGL-3'. If it is missing for any reason, please see the Free
 *  Software Foundation's website at <http://www.fsf.org/>, or write
 *  to the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 *  Boston, MA 02111-1307 USA
 */

package haven.error;

import haven.Config;

import java.io.*;
import java.net.*;
import java.util.*;

public class ErrorHandler extends ThreadGroup {
    private final URL errordest;
    private static final String[] sysprops = {
	"java.version",
	"java.vendor",
	"os.name",
	"os.arch",
	"os.version",
    };
    private final ThreadGroup initial;
    private Map<String, Object> props = new HashMap<String, Object>();
    private Reporter reporter;
	
    public static ErrorHandler find() {
	for(ThreadGroup tg = Thread.currentThread().getThreadGroup(); tg != null; tg = tg.getParent()) {
	    if(tg instanceof ErrorHandler)
		return((ErrorHandler)tg);
	}
	return(null);
    }

    public static void setprop(String key, Object val) {
	ErrorHandler tg = find();
	if(tg != null)
	    tg.lsetprop(key, val);
    }
    
    public void lsetprop(String key, Object val) {
	props.put(key, val);
    }

    private class Reporter extends Thread {
	private Queue<Report> errors = new LinkedList<Report>();
	private ErrorStatus status;
	
	public Reporter(ErrorStatus status) {
	    super(initial, "Error reporter");
	    setDaemon(true);
	    this.status = status;
	}
	
	public void run() {
	    while(true) {
		synchronized(errors) {
		    try {
			errors.wait();
		    } catch(InterruptedException e) {
			return;
		    }
		    Report r;
		    while((r = errors.poll()) != null) {
			try {
			    doreport(r);
			} catch(Exception e) {
			    r.t.printStackTrace();
			    status.senderror(e);
			}
		    }
		}
	    }
	}
	
	private void doreport(Report r) throws IOException {
	    if(!status.goterror(r.t))
		return;
	    if(errordest != null){
		dourlreport(r);
	    } else {
		dolocalreport(r);
	    }
	}
    
	private void dolocalreport(Report r) throws IOException {
	    FileOutputStream fs = new FileOutputStream(Config.userhome+"/error.html");
	    HtmlReporter.makereport(fs, r);
	    fs.close();
	    status.done(null, null);
	}

	private void dourlreport(Report r) throws IOException {
	    URLConnection c = errordest.openConnection();
	    status.connecting();
	    c.setDoOutput(true);
	    c.addRequestProperty("Content-Type", "application/x-java-error");
	    c.connect();
	    ObjectOutputStream o = new ObjectOutputStream(c.getOutputStream());
	    status.sending();
	    o.writeObject(r);
	    o.close();
	    String ctype = c.getContentType();
	    StringWriter buf = new StringWriter();
	    Reader i = new InputStreamReader(c.getInputStream(), "utf-8");
	    char[] dbuf = new char[1024];
	    while(true) {
		int len = i.read(dbuf);
		if(len < 0)
		    break;
		buf.write(dbuf, 0, len);
	    }
	    i.close();
	    if(ctype.equals("text/x-report-info")) {
		status.done("text/x-report-info", buf.toString());
	    } else if(ctype.equals("text/x-report-error")) {
		throw(new ReportException(buf.toString()));
	    } else {
		status.done(null, null);
	    }
	}

	public void report(Thread th, Throwable t) {
	    Report r = new Report(t);
	    r.props.putAll(props);
	    r.props.put("thnm", th.getName());
	    r.props.put("thcl", th.getClass().getName());
	    synchronized(errors) {
		errors.add(r);
		errors.notifyAll();
	    }
	    try {
		r.join();
	    } catch(InterruptedException e) { /* XXX? */ }
	}
    }

    private void defprops() {
	for(String p : sysprops)
	    props.put(p, System.getProperty(p));
	Runtime rt = Runtime.getRuntime();
	props.put("cpus", rt.availableProcessors());
	InputStream in = ErrorHandler.class.getResourceAsStream("/buildinfo");
	try {
	    try {
		if(in != null) {
		    Properties info = new Properties();
		    info.load(in);
		    for(Map.Entry<Object, Object> e : info.entrySet())
			props.put("jar." + (String)e.getKey(), e.getValue());
		}
	    } finally {
		in.close();
	    }
	} catch(IOException e) {
	    throw(new Error(e));
	}
    }

    public ErrorHandler(ErrorStatus ui, URL errordest) {
	super("Haven client");
	this.errordest = errordest;
	initial = Thread.currentThread().getThreadGroup();
	reporter = new Reporter(ui);
	reporter.start();
	defprops();
    }
    
    public ErrorHandler(URL errordest) {
	this(new ErrorStatus.Simple(), errordest);
    }
    
    public ErrorHandler(ErrorStatus ui) {
	this(ui, null);
    }

    public ErrorHandler() {
	this(new ErrorStatus.Simple());
    }

    public void sethandler(ErrorStatus handler) {
	reporter.status = handler;
    }
    
    public void uncaughtException(Thread t, Throwable e) {
	reporter.report(t, e);
    }
}