Java example source code file (InvokerTube.java)

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

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstracttubeimpl, asyncprovidercallback, illegalaccessexception, invocationtargetexception, invoker, invokertube, notnull, object, override, packet, reflection, threadlocal, wsendpoint, wswebservicecontext, xml

The InvokerTube.java Java example source code

/*
 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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 General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package com.sun.xml.internal.ws.server;

import com.sun.istack.internal.NotNull;
import com.sun.istack.internal.Nullable;
import com.sun.xml.internal.ws.api.message.Packet;
import com.sun.xml.internal.ws.api.pipe.TubeCloner;
import com.sun.xml.internal.ws.api.pipe.helper.AbstractTubeImpl;
import com.sun.xml.internal.ws.api.server.*;
import com.sun.xml.internal.ws.resources.ServerMessages;
import com.sun.xml.internal.ws.server.provider.ProviderInvokerTube;
import com.sun.xml.internal.ws.server.sei.SEIInvokerTube;

import javax.xml.ws.WebServiceContext;
import javax.xml.ws.WebServiceException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;

/**
 * Base code for {@link ProviderInvokerTube} and {@link SEIInvokerTube}.
 *
 * <p>
 * This hides {@link InstanceResolver} and performs a set up
 * necessary for {@link WebServiceContext} to correctly.
 *
 * @author Kohsuke Kawaguchi
 */
public abstract class InvokerTube<T> extends com.sun.xml.internal.ws.server.sei.InvokerTube implements EndpointAwareTube {

    private WSEndpoint endpoint;

    protected InvokerTube(Invoker invoker) {
        super(invoker);
    }

    public void setEndpoint(WSEndpoint endpoint) {
        this.endpoint = endpoint;
        WSWebServiceContext webServiceContext = new AbstractWebServiceContext(endpoint) {
            public @Nullable Packet getRequestPacket() {
                Packet p = packets.get();
                return p;
            }
        };
        invoker.start(webServiceContext,endpoint);
    }

    protected WSEndpoint getEndpoint() {
        return endpoint;
    }

    /**
     * Returns the application object that serves the request.
     *
    public final @NotNull T getServant(Packet request) {
        // this allows WebServiceContext to find this packet
        packets.set(request);
        return invoker.resolve(request);
    }
     */

    /**
     * Returns the {@link Invoker} object that serves the request.
     */
    public final @NotNull Invoker getInvoker(Packet request) {
        return wrapper;
    }

    /**
     * processRequest() and processResponse() do not share any instance variables
     * while processing the request. {@link InvokerTube} is stateless and terminal,
     * so no need to create copies.
     */
    public final AbstractTubeImpl copy(TubeCloner cloner) {
        cloner.add(this,this);
        return this;
    }

    public void preDestroy() {
        invoker.dispose();
    }

    /**
     * Heart of {@link WebServiceContext}.
     * Remembers which thread is serving which packet.
     */
    private static final ThreadLocal<Packet> packets = new ThreadLocal();

    /**
     * This method can be called while the user service is servicing the request
     * synchronously, to obtain the current request packet.
     *
     * <p>
     * This is primarily designed for {@link StatefulInstanceResolver}. Use with care.
     */
    public static @NotNull Packet getCurrentPacket() {
        Packet packet = packets.get();
        if(packet==null)
            throw new WebServiceException(ServerMessages.NO_CURRENT_PACKET());
        return packet;
    }

    /**
     * {@link Invoker} filter that sets and restores the current packet.
     */
    private final Invoker wrapper = new Invoker() {
        @Override
        public Object invoke(Packet p, Method m, Object... args) throws InvocationTargetException, IllegalAccessException {
            Packet old = set(p);
            try {
                return invoker.invoke(p, m, args);
            } finally {
                set(old);
            }
        }

        @Override
        public <T>T invokeProvider(Packet p, T arg) throws IllegalAccessException, InvocationTargetException {
            Packet old = set(p);
            try {
                return invoker.invokeProvider(p, arg);
            } finally {
                set(old);
            }
        }

        @Override
        public <T>void invokeAsyncProvider(Packet p, T arg, AsyncProviderCallback cbak, WebServiceContext ctxt) throws IllegalAccessException, InvocationTargetException {
            Packet old = set(p);
            try {
                invoker.invokeAsyncProvider(p, arg, cbak, ctxt);
            } finally {
                set(old);
            }
        }

        private Packet set(Packet p) {
            Packet old = packets.get();
            packets.set(p);
            return old;
        }
    };

}