org.glassfish.grizzly.http.KeepAliveProbe Maven / Gradle / Ivy
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2008-2015 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
package org.glassfish.grizzly.http;
import org.glassfish.grizzly.Connection;
/**
* Monitoring probe providing callbacks that may be invoked by Grizzly {@link KeepAlive}.
*
* @author Alexey Stashok
*
* @since 2.0
*/
public interface KeepAliveProbe {
/**
* Method will be called, when new keep-alive HTTP connection is getting established.
* This method is getting invoked, when 1st HTTP request processing completes,
* but the Connection will be kept alive to process next HTTP request.
*
* @param connection {@link Connection}, the event belongs to.
*/
void onConnectionAcceptEvent(Connection connection);
/**
* Method will be called, when HTTP request comes on a kept alive connection.
*
* @param connection {@link Connection}, the event belongs to.
* @param requestNumber HTTP request number, being processed on the given keep-alive connection.
*/
void onHitEvent(Connection connection, int requestNumber);
/**
* Method will be called, when the Connection could be used in the keep alive mode,
* but due to KeepAlive config limitations it will be closed.
*
* @param connection {@link Connection}, the event belongs to.
*/
void onRefuseEvent(Connection connection);
/**
* Method will be called, when the keep alive Connection idle timeout expired.
*
* @param connection {@link Connection}, the event belongs to.
*/
void onTimeoutEvent(Connection connection);
// ---------------------------------------------------------- Nested Classes
/**
* {@link KeepAliveProbe} adapter that provides no-op implementations for
* all interface methods allowing easy extension by the developer.
*
* @since 2.1.9
*/
@SuppressWarnings("UnusedDeclaration")
class Adapter implements KeepAliveProbe {
// ----------------------------------------- Methods from KeepAliveProbe
/**
* {@inheritDoc}
*/
@Override
public void onConnectionAcceptEvent(Connection connection) {}
/**
* {@inheritDoc}
*/
@Override
public void onHitEvent(Connection connection, int requestNumber) {}
/**
* {@inheritDoc}
*/
@Override
public void onRefuseEvent(Connection connection) {}
/**
* {@inheritDoc}
*/
@Override
public void onTimeoutEvent(Connection connection) {}
} // END Adapter
}