com.liferay.portal.kernel.test.CaptureHandler Maven / Gradle / Ivy

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/**
 * Copyright (c) 2000-present Liferay, Inc. All rights reserved.
 *
 * This 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 2.1 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.
 */

package com.liferay.portal.kernel.test;

import com.liferay.portal.kernel.util.StringBundler;

import java.io.Closeable;

import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogRecord;
import java.util.logging.Logger;

/**
 * @author Shuyang Zhou
 */
public class CaptureHandler extends Handler implements Closeable {

	public CaptureHandler(Logger logger, Level level) {
		_logger = logger;

		_handlers = logger.getHandlers();
		_level = logger.getLevel();
		_useParentHandlers = logger.getUseParentHandlers();

		for (Handler handler : _handlers) {
			logger.removeHandler(handler);
		}

		logger.setLevel(level);
		logger.setUseParentHandlers(false);
	}

	@Override
	public void close() {
		_logRecords.clear();

		_logger.removeHandler(this);

		for (Handler handler : _handlers) {
			_logger.addHandler(handler);
		}

		_logger.setLevel(_level);
		_logger.setUseParentHandlers(_useParentHandlers);
	}

	@Override
	public void flush() {
		_logRecords.clear();
	}

	public List getLogRecords() {
		return _logRecords;
	}

	@Override
	public boolean isLoggable(LogRecord logRecord) {
		return false;
	}

	@Override
	public void publish(LogRecord logRecord) {
		_logRecords.add(new PrintableLogRecord(logRecord));
	}

	public List resetLogLevel(Level level) {
		_logRecords.clear();

		_logger.setLevel(level);

		return _logRecords;
	}

	private final Handler[] _handlers;
	private final Level _level;
	private final Logger _logger;
	private final List _logRecords = new CopyOnWriteArrayList<>();
	private final boolean _useParentHandlers;

	private static class PrintableLogRecord extends LogRecord {

		@Override
		public String toString() {
			StringBundler sb = new StringBundler(5);

			sb.append("{level=");
			sb.append(getLevel());
			sb.append(", message=");
			sb.append(getMessage());
			sb.append("}");

			return sb.toString();
		}

		private PrintableLogRecord(LogRecord logRecord) {
			super(logRecord.getLevel(), logRecord.getMessage());

			setLoggerName(logRecord.getLoggerName());
			setMillis(logRecord.getMillis());
			setParameters(logRecord.getParameters());
			setResourceBundle(logRecord.getResourceBundle());
			setResourceBundleName(logRecord.getResourceBundleName());
			setSequenceNumber(logRecord.getSequenceNumber());
			setSourceClassName(logRecord.getSourceClassName());
			setSourceMethodName(logRecord.getSourceMethodName());
			setThreadID(logRecord.getThreadID());
			setThrown(logRecord.getThrown());
		}

	}

}