Apache CXF example source code file (StreamInterceptor.java)

This example Apache CXF source code file (StreamInterceptor.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

abstractphaseinterceptor, cachedoutputstream, cachedoutputstream, cachedstream, cachedstream, gzipinputstream, gzipinputstream, gzipoutputstream, inputstream, io, ioexception, ioexception, outputstream, streaminterceptor, zip

The Apache CXF StreamInterceptor.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 demo.stream.interceptor;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;

import org.apache.cxf.binding.soap.interceptor.SoapPreProtocolOutInterceptor;
import org.apache.cxf.io.CachedOutputStream;
import org.apache.cxf.message.Message;
import org.apache.cxf.phase.AbstractPhaseInterceptor;
import org.apache.cxf.phase.Phase;

public class StreamInterceptor extends AbstractPhaseInterceptor<Message> {

    public StreamInterceptor() {
        super(Phase.PRE_STREAM);
        addBefore(SoapPreProtocolOutInterceptor.class.getName());
    }
    
    public void handleMessage(Message message) {
        //TODO

        boolean isOutbound = false;
        isOutbound = message == message.getExchange().getOutMessage()
               || message == message.getExchange().getOutFaultMessage();

        if (isOutbound) {
            OutputStream os = message.getContent(OutputStream.class);
            CachedStream cs = new CachedStream();
            message.setContent(OutputStream.class, cs);
            
            message.getInterceptorChain().doIntercept(message);

            try {
                cs.flush();
                CachedOutputStream csnew = (CachedOutputStream) message
                    .getContent(OutputStream.class);
                GZIPOutputStream zipOutput = new GZIPOutputStream(os);
                CachedOutputStream.copyStream(csnew.getInputStream(), zipOutput, 1024);

                cs.close();
                zipOutput.close();
                os.flush();

                message.setContent(OutputStream.class, os);
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        } else {
            try {
                InputStream is = message.getContent(InputStream.class);
                GZIPInputStream zipInput = new GZIPInputStream(is);
                message.setContent(InputStream.class, zipInput);
            } catch (IOException ioe) {
                ioe.printStackTrace();
            }
        }
    }

    public void handleFault(Message message) {
    }
    

    private class CachedStream extends CachedOutputStream {
        public CachedStream() {
            super();
        }
        
        protected void doFlush() throws IOException {
            currentStream.flush();
        }

        protected void doClose() throws IOException {
        }
        
        protected void onWrite() throws IOException {
        }
    }
}