/**
* 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.lucene.gdata.hivemind.webservice;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import com.caucho.hessian.io.AbstractHessianOutput;
import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;
import com.caucho.hessian.io.HessianOutput;
import com.caucho.hessian.io.SerializerFactory;
import com.caucho.hessian.server.HessianSkeleton;
/**
* Wrapps the hessian skeleton invokation logic.
* This is based on the protocol description of the hessian protocol
* @author Simon Willnauer
*
*/
class HessianServiceSkeletonInvokerImpl implements
HessianServiceSkeletonInvoker {
private static final Log LOG = LogFactory.getLog(HessianServiceSkeletonInvokerImpl.class);
private SerializerFactory serializerFactory;
private final HessianSkeleton skeleton;
/**
* Creates a new HessianServiceSkeletonInvoker
* @param skeleton - The skeleton instance to invoke to process the request
*
*/
HessianServiceSkeletonInvokerImpl(final HessianSkeleton skeleton) {
this.skeleton = skeleton;
}
/**
* @throws Throwable
* @see org.apache.lucene.gdata.hivemind.webservice.HessianServiceSkeletonInvoker#invoke(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
*/
public void invoke(HttpServletRequest arg0, HttpServletResponse arg1) throws Throwable {
InputStream inputStream = arg0.getInputStream();
OutputStream outputStream = arg1.getOutputStream();
/*
*This works only with hessian >= hessian-3.0.20!!
*but remember this is not a framework
*/
Hessian2Input hessianInput = new Hessian2Input(inputStream);
if (this.serializerFactory != null) {
hessianInput.setSerializerFactory(this.serializerFactory);
}
int code = hessianInput.read();
if (code != 'c') {
throw new IOException("expected 'c' in hessian input at " + code);
}
AbstractHessianOutput hessianOutput = null;
int major = hessianInput.read();
// useless read just get the stream in the right position.
int minor = hessianInput.read();
if (major >= 2) {
hessianOutput = new Hessian2Output(outputStream);
}
else {
hessianOutput = new HessianOutput(outputStream);
}
if (this.serializerFactory != null) {
hessianOutput.setSerializerFactory(this.serializerFactory);
}
try {
this.skeleton.invoke(hessianInput, hessianOutput);
} catch (Throwable e) {
LOG.error("Unexpected Exception thrown -- "+e.getMessage(),e);
throw e;
}
}
/**
* @return Returns the serializerFactory.
*/
public SerializerFactory getSerializerFactory() {
return this.serializerFactory;
}
/**
* @param serializerFactory The serializerFactory to set.
*/
public void setSerializerFactory(SerializerFactory serializerFactory) {
this.serializerFactory = serializerFactory;
}
}