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Glassfish example source code file (LazyServiceInitializer.java)

This example Glassfish source code file (LazyServiceInitializer.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Glassfish tags/keywords

contract, contract, lazyserviceinitializer, lazyserviceinitializer, string, string

The Glassfish LazyServiceInitializer.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2009-2010 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.internal.grizzly;

import java.nio.channels.SelectableChannel;

import org.jvnet.hk2.annotations.Contract;

/**
 * This interface is meant for all services that wish to be initialized lazily.
 * Such services are expected to implement this interface and those
 * implementatons should be available to HK2 for lookup. 
 * 
 * 
 * @author Vijay Ramachandran
*/
@Contract
public interface LazyServiceInitializer {
    /**
     * Returns the string associated with 'name' attribute of corresponding
     * <network-listener> element in domain.xml. The service initializer uses
     * this return value to select the proper service provider from the list
     * of service providers that implement this interface.
     * 
     * For GFv3, however, since IIOP and MQ service will not able to move
     * <network-listener> element, the implementations of this interface for
     * IIOP/JMS service will return String "iiop-service"/"mq-service"
     *
     * @return The value of the 'name' attribute in the corresponding 
     *         <network-listener> element for this service
     */
    public String getServiceName();

    /**
     * Upon accepting the first request on the port (to which this listener is
     * bound), the listener will select the appropriate provider and call this
     * method to let the actual service initialize itself. All further accept
     * requests on this port will wait while the service is initialized.
     * Upon successful completion of service initialization, all pending
     * requests are passed to the service using the handleRequest method
     *
     * @return Return true if service initialization went through fine; false
     *         otherwise
     */
    public boolean initializeService();

    /**
     * Upon successful ACCEPT of every request on this port, the service
     * is called upon to handle the request. The service is provided the 
     * channel itself. The service can setup connection, its characteristics,
     * decide on blocking/non-blocking modes etc. The service is expected to
     * return control back to the listener ASAP without consuming this thread
     * for processing the requst completely.
     *
     * @param channel where the incoming request was accepted.
     */
    public void handleRequest(SelectableChannel channel);
}

Other Glassfish examples (source code examples)

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