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/*
* Copyright (c) OSGi Alliance (2000, 2016). All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.osgi.service.log;
import java.util.EventListener;
import org.osgi.annotation.versioning.ConsumerType;
/**
* Subscribes to {@code LogEntry} objects from the {@code LogReaderService}.
* <p>
* A {@code LogListener} object may be registered with the Log Reader Service
* using the {@code LogReaderService.addLogListener} method. After the listener
* is registered, the {@code logged} method will be called for each
* {@code LogEntry} object created. The {@code LogListener} object may be
* unregistered by calling the {@code LogReaderService.removeLogListener}
* method.
* <p>
* Since 1.4, {@link org.osgi.service.log.stream.LogStream} is the preferred way
* to obtain {@link LogEntry} objects.
*
* @ThreadSafe
* @author $Id$
*/
@ConsumerType
@FunctionalInterface
public interface LogListener extends EventListener {
/**
* Listener method called for each LogEntry object created.
*
* @param entry A {@link LogEntry} object containing log information.
*/
void logged(LogEntry entry);
}
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