Mega Code Archive
Logger and Logger Listener
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/*
Amarino - A prototyping software toolkit for Android and Arduino
Copyright (c) 2010 Bonifaz Kaufmann. All right reserved.
This application and its 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 3 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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
//package at.abraxas.amarino.log;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedList;
import java.util.List;
import java.util.ListIterator;
import android.util.Log;
/**
*
* @author Bonifaz Kaufmann
*
* $Id: Logger.java 444 2010-06-10 13:11:59Z abraxas $
*/
public class Logger {
public static boolean enabled = true;
public static final String KEY_IS_LOG_ENABLED = "is_log_enabled";
private static final boolean DEBUG = true;
private static final String TAG = "AmarinoLogger";
private static final int MAX_LOG_ENTRIES = 200;
private static ArrayList<LogListener> listeners = new ArrayList<LogListener>();
private static List<String> log = Collections.synchronizedList(new LinkedList<String>());
private static int logSize = 0;
public static void d(String tag, String msg){
String text = tag + ": " + msg;
if (DEBUG)
Log.d(TAG, text);
if (enabled)
add(text);
}
public static void d(String msg){
if (DEBUG)
Log.d(TAG, msg);
if (enabled)
add(msg);
}
private static void add(String msg){
synchronized (log){
if (logSize < MAX_LOG_ENTRIES){
logSize++;
}
else {
// we don't check if elements are present, since we trust logSize
log.remove(0);
//log.removeFirst();
}
log.add(msg);
}
notifyListeners(msg.toString());
}
public static synchronized void clear(){
logSize = 0;
log.clear();
}
public static String getLog(){
StringBuilder sb = new StringBuilder();
synchronized(log){
ListIterator<String> iter = log.listIterator();
while (iter.hasNext()){
sb.append(iter.next());
sb.append("\n");
}
}
return sb.toString();
}
public static synchronized void registerLogListener(LogListener listener) {
if (!listeners.contains(listener))
listeners.add(listener);
}
public static synchronized void unregisterLogListener(LogListener listener) {
listeners.remove(listener);
}
private static void notifyListeners(final String lastAddedMsg){
if (listeners != null){
for (LogListener ll : listeners)
ll.logChanged(lastAddedMsg);
}
}
}
/**
*
* @author Bonifaz Kaufmann
*
* $Id: LogListener.java 444 2010-06-10 13:11:59Z abraxas $
*/
interface LogListener {
public void logChanged(String lastAddedMsg);
}
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