Apache CXF example source code file (LocalConduit.java)

This example Apache CXF source code file (LocalConduit.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 - Apache CXF tags/keywords

abstractwrappedoutputstream, cachedoutputstream, exchangeimpl, exchangeimpl, illegalstateexception, io, ioexception, ioexception, local, localconduit, log, logging, messageimpl, messageimpl, messageobserver, string, string

The Apache CXF LocalConduit.java source code

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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.apache.cxf.transport.local;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PipedInputStream;
import java.io.PipedOutputStream;
import java.util.logging.Logger;

import org.apache.cxf.common.logging.LogUtils;
import org.apache.cxf.io.AbstractWrappedOutputStream;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Exchange;
import org.apache.cxf.message.ExchangeImpl;
import org.apache.cxf.message.Message;
import org.apache.cxf.message.MessageImpl;
import org.apache.cxf.transport.AbstractConduit;

public class LocalConduit extends AbstractConduit {

    public static final String IN_CONDUIT = LocalConduit.class.getName() + ".inConduit";
    public static final String RESPONSE_CONDUIT = LocalConduit.class.getName() + ".inConduit";
    public static final String IN_EXCHANGE = LocalConduit.class.getName() + ".inExchange";
    public static final String DIRECT_DISPATCH = LocalConduit.class.getName() + ".directDispatch";
    public static final String MESSAGE_FILTER_PROPERTIES = LocalTransportFactory.MESSAGE_FILTER_PROPERTIES;

    private static final Logger LOG = LogUtils.getL7dLogger(LocalConduit.class);
    
    private LocalDestination destination;
    private LocalTransportFactory transportFactory;

    public LocalConduit(LocalTransportFactory transportFactory, LocalDestination destination) {
        super(destination.getAddress());
        this.destination = destination;
        this.transportFactory = transportFactory;
    }
    
    public void prepare(final Message message) throws IOException {
        if (!Boolean.TRUE.equals(message.get(DIRECT_DISPATCH))) {
            dispatchViaPipe(message);
        } else {
            // prepare the stream here
            CachedOutputStream stream = new CachedOutputStream();
            message.setContent(OutputStream.class, stream);
        }
    }

    @Override
    public void close(Message message) throws IOException {
        if (Boolean.TRUE.equals(message.get(DIRECT_DISPATCH))
            && !Boolean.TRUE.equals(message.get(Message.INBOUND_MESSAGE))) {
            dispatchDirect(message);
        } 
        
        super.close(message);
    }

    private void dispatchDirect(Message message) throws IOException {
        if (destination.getMessageObserver() == null) {
            throw new IllegalStateException("Local destination does not have a MessageObserver on address " 
                                            + destination.getAddress().getAddress().getValue());
        }

        MessageImpl copy = new MessageImpl();
        copy.put(IN_CONDUIT, this);
        copy.setDestination(destination);
        
        transportFactory.copy(message, copy);
        MessageImpl.copyContent(message, copy);
        
        CachedOutputStream stream = (CachedOutputStream)message.getContent(OutputStream.class);
        copy.setContent(InputStream.class, stream.getInputStream());

        // Create a new incoming exchange and store the original exchange for the response
        ExchangeImpl ex = new ExchangeImpl();
        ex.setInMessage(copy);
        ex.put(IN_EXCHANGE, message.getExchange());
        ex.put(LocalConduit.DIRECT_DISPATCH, true);
        ex.setDestination(destination);
        
        destination.getMessageObserver().onMessage(copy);
    }


    private void dispatchViaPipe(final Message message) throws IOException {
        final LocalConduit conduit = this;
        final Exchange exchange = message.getExchange();
        
        if (destination.getMessageObserver() == null) {
            throw new IllegalStateException("Local destination does not have a MessageObserver on address " 
                                            + destination.getAddress().getAddress().getValue());
        }
        
        
        AbstractWrappedOutputStream cout 
            = new AbstractWrappedOutputStream() {
                protected void onFirstWrite() throws IOException {
                    final PipedInputStream stream = new PipedInputStream();
                    wrappedStream = new PipedOutputStream(stream);

                    final MessageImpl inMsg = new MessageImpl();
                    transportFactory.copy(message, inMsg); 

                    inMsg.setContent(InputStream.class, stream);
                    inMsg.setDestination(destination);
                    inMsg.put(IN_CONDUIT, conduit);

                    final Runnable receiver = new Runnable() {
                        public void run() {                            
                            ExchangeImpl ex = new ExchangeImpl();
                            ex.setInMessage(inMsg);
                            ex.put(IN_EXCHANGE, exchange);
                            destination.getMessageObserver().onMessage(inMsg);
                        }
                    };
                    
                    new Thread(receiver).start();
                }
            };
        message.setContent(OutputStream.class, cout);
    }
    
    protected Logger getLogger() {
        return LOG;
    }
}