/*
* 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.synapse.transport.nhttp.util;
import org.apache.axiom.om.OMOutputFormat;
import org.apache.axis2.AxisFault;
import org.apache.axis2.context.MessageContext;
import org.apache.axis2.transport.MessageFormatter;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URL;
import java.util.zip.GZIPOutputStream;
/**
* This is the decorator for message formatter and it is need because there isn't any mechanism
* that can process the message before formatting is occurred. For handle 'Accept-Encoding' some
* kind of this is required. This decorator encapsulates the message formatter and add the whatever
* functionally when as required without effecting message formatter functionality.
* This enable to serialize message in Gzip format .
*/
public class GzipMessageFormatterDecorator implements MessageFormatter {
private static final Log log = LogFactory.getLog(GzipMessageFormatterDecorator.class);
/* The encapsulated message formatter instance */
private MessageFormatter messageFormatter;
public GzipMessageFormatterDecorator(MessageFormatter messageFormatter) {
this.messageFormatter = messageFormatter;
}
public byte[] getBytes(MessageContext messageContext, OMOutputFormat format) throws AxisFault {
return messageFormatter.getBytes(messageContext, format);
}
public void writeTo(MessageContext messageContext, OMOutputFormat format, OutputStream outputStream, boolean preserve) throws AxisFault {
try {
// Writes message as an GZIP stream
if (log.isDebugEnabled()) {
log.debug("Serialize message in to a GZIP stream");
}
OutputStream out = new GZIPOutputStream(outputStream);
messageFormatter.writeTo(messageContext, format, out, preserve);
try {
out.flush();
out.close();
} catch (IOException e) {
handleException("Error closing message stream", e);
}
} catch (IOException e) {
handleException("Error getting GZIP output stream", e);
}
}
public String getContentType(MessageContext messageContext, OMOutputFormat format, String soapAction) {
return messageFormatter.getContentType(messageContext, format, soapAction);
}
public URL getTargetAddress(MessageContext messageContext, OMOutputFormat format, URL targetURL) throws AxisFault {
return messageFormatter.getTargetAddress(messageContext, format, targetURL);
}
public String formatSOAPAction(MessageContext messageContext, OMOutputFormat format, String soapAction) {
return messageFormatter.formatSOAPAction(messageContext, format, soapAction);
}
private void handleException(String msg, Exception e) throws AxisFault {
log.error(msg, e);
throw new AxisFault(msg, e);
}
}