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233 lines
8.6 KiB
233 lines
8.6 KiB
//GuiHandler.java
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//-------------------------------------
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//part of YACY
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//(C) by Michael Peter Christen; mc@anomic.de
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//first published on http://www.anomic.de
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//Frankfurt, Germany, 2004
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//
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//This file ist contributed by Martin Thelian
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//last major change: $LastChangedDate$ by $LastChangedBy$
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//Revision: $LastChangedRevision$
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//
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//This program is free software; you can redistribute it and/or modify
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//it under the terms of the GNU General Public License as published by
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//the Free Software Foundation; either version 2 of the License, or
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//(at your option) any later version.
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//
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//This program is distributed in the hope that it will be useful,
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//but WITHOUT ANY WARRANTY; without even the implied warranty of
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//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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//GNU General Public License for more details.
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//
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//You should have received a copy of the GNU General Public License
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//along with this program; if not, write to the Free Software
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//Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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//Using this software in any meaning (reading, learning, copying, compiling,
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//running) means that you agree that the Author(s) is (are) not responsible
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//for cost, loss of data or any harm that may be caused directly or indirectly
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//by usage of this softare or this documentation. The usage of this software
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//is on your own risk. The installation and usage (starting/running) of this
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//software may allow other people or application to access your computer and
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//any attached devices and is highly dependent on the configuration of the
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//software which must be done by the user of the software; the author(s) is
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//(are) also not responsible for proper configuration and usage of the
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//software, even if provoked by documentation provided together with
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//the software.
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//
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//Any changes to this file according to the GPL as documented in the file
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//gpl.txt aside this file in the shipment you received can be done to the
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//lines that follows this copyright notice here, but changes must not be
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//done inside the copyright notive above. A re-distribution must contain
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//the intact and unchanged copyright notice.
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//Contributions and changes to the program code must be marked as such.
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package de.anomic.server.logging;
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import java.util.ArrayList;
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import java.util.logging.ErrorManager;
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import java.util.logging.Filter;
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import java.util.logging.Formatter;
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import java.util.logging.Handler;
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import java.util.logging.Level;
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import java.util.logging.LogManager;
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import java.util.logging.LogRecord;
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import java.util.logging.SimpleFormatter;
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public class GuiHandler extends Handler{
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private final static int DEFAULT_SIZE = 400;
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private int size = DEFAULT_SIZE;
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private LogRecord buffer[];
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int start, count;
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public GuiHandler() {
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super();
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configure();
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init();
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}
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/**
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* Get any configuration properties set
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*/
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private void configure() {
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LogManager manager = LogManager.getLogManager();
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String className = getClass().getName();
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String level = manager.getProperty(className + ".level");
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setLevel((level == null) ? Level.INFO : Level.parse(level));
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String filter = manager.getProperty(className + ".filter");
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setFilter(makeFilter(filter));
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String formatter = manager.getProperty(className + ".formatter");
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setFormatter(makeFormatter(formatter));
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String sizeString = manager.getProperty(className + ".size");
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this.size = parseSize(sizeString);
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}
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private int parseSize(String sizeString) {
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int newSize = DEFAULT_SIZE;
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try {
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newSize = Integer.parseInt(sizeString);
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} catch (NumberFormatException e) {
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newSize = DEFAULT_SIZE;
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}
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return newSize;
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}
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private Filter makeFilter(String name) {
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if (name == null) return null;
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Filter f = null;
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try {
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Class<?> c = Class.forName(name);
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f = (Filter)c.newInstance();
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} catch (Exception e) {
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System.err.println("Unable to load filter: " + name);
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}
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return f;
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}
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private Formatter makeFormatter(String name) {
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if (name == null) return null;
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Formatter f = null;
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try {
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Class<?> c = Class.forName(name);
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f = (Formatter)c.newInstance();
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} catch (Exception e) {
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f = new SimpleFormatter();
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}
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return f;
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}
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// Initialize. Size is a count of LogRecords.
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private void init() {
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this.buffer = new LogRecord[this.size];
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this.start = 0;
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this.count = 0;
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}
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public int getSize() {
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return this.size;
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}
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public synchronized void publish(LogRecord record) {
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if (!isLoggable(record)) return;
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// write it to the buffer
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int ix = (this.start+this.count)%this.buffer.length;
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this.buffer[ix] = record;
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if (this.count < this.buffer.length) {
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this.count++;
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} else {
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this.start++;
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}
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}
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public synchronized LogRecord[] getLogArray() {
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return this.getLogArray(null);
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}
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public synchronized LogRecord[] getLogArray(Long sequenceNumberStart) {
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ArrayList<LogRecord> tempBuffer = new ArrayList<LogRecord>(this.count);
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for (int i = 0; i < this.count; i++) {
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int ix = (this.start+i)%this.buffer.length;
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LogRecord record = this.buffer[ix];
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if ((sequenceNumberStart == null) || (record.getSequenceNumber() >= sequenceNumberStart.longValue())) {
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tempBuffer.add(record);
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}
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}
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return (LogRecord[]) tempBuffer.toArray(new LogRecord[tempBuffer.size()]);
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}
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public synchronized String getLog(boolean reversed, int lineCount) {
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if ((lineCount > this.count)||(lineCount < 0)) lineCount = this.count;
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StringBuffer logMessages = new StringBuffer(this.count*40);
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Formatter logFormatter = getFormatter();
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try {
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int start = (reversed)?this.start+this.count-1:this.start;
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LogRecord record=null;
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for (int i = 0; i < lineCount; i++) {
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int ix = (reversed) ?
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Math.abs((start-i)%this.buffer.length) :
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(start+i)%this.buffer.length;
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record = this.buffer[ix];
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logMessages.append(logFormatter.format(record));
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}
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return logMessages.toString();
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} catch (Exception ex) {
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// We don't want to throw an exception here, but we
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// report the exception to any registered ErrorManager.
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reportError(null, ex, ErrorManager.FORMAT_FAILURE);
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return "Error while formatting the logging message";
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}
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}
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public synchronized String[] getLogLines(boolean reversed, int lineCount) {
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if ((lineCount > this.count)||(lineCount < 0)) lineCount = this.count;
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ArrayList<String> logMessages = new ArrayList<String>(this.count);
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Formatter logFormatter = getFormatter();
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try {
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int theStart = (reversed)?this.start+this.count-1:this.start+this.count-lineCount;
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LogRecord record=null;
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for (int i = 0; i < lineCount; i++) {
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int ix = (reversed) ?
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Math.abs((theStart-i)%this.buffer.length) :
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(theStart + i) % this.buffer.length;
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record = this.buffer[ix];
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logMessages.add(logFormatter.format(record));
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}
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return (String[])logMessages.toArray(new String[logMessages.size()]);
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} catch (Exception ex) {
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// We don't want to throw an exception here, but we
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// report the exception to any registered ErrorManager.
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reportError(null, ex, ErrorManager.FORMAT_FAILURE);
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return new String[]{"Error while formatting the logging message"};
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}
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}
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public void flush() {
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// TODO Auto-generated method stub
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}
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public void close() throws SecurityException {
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// TODO Auto-generated method stub
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}
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}
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