/*
* Copyright 2002-2008 the original author or authors.
*
* Licensed 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.springframework.remoting.caucho;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.PrintWriter;
import com.caucho.hessian.io.AbstractHessianOutput;
import com.caucho.hessian.io.Hessian2Input;
import com.caucho.hessian.io.Hessian2Output;
import com.caucho.hessian.io.HessianDebugInputStream;
import com.caucho.hessian.io.HessianDebugOutputStream;
import com.caucho.hessian.io.HessianOutput;
import com.caucho.hessian.io.SerializerFactory;
import com.caucho.hessian.server.HessianSkeleton;
import org.apache.commons.logging.Log;
import org.springframework.util.ClassUtils;
import org.springframework.util.CommonsLogWriter;
/**
* Concrete HessianSkeletonInvoker for the Hessian 2 protocol
* (version 3.0.20 or higher).
*
* @author Juergen Hoeller
* @author Andy Piper
* @since 2.0
*/
class Hessian2SkeletonInvoker extends HessianSkeletonInvoker {
private static final boolean debugOutputStreamAvailable = ClassUtils.isPresent(
"com.caucho.hessian.io.HessianDebugOutputStream", Hessian2SkeletonInvoker.class.getClassLoader());
private final Log debugLogger;
public Hessian2SkeletonInvoker(HessianSkeleton skeleton, SerializerFactory serializerFactory, Log debugLog) {
super(skeleton, serializerFactory);
this.debugLogger = debugLog;
}
public void invoke(final InputStream inputStream, final OutputStream outputStream) throws Throwable {
InputStream isToUse = inputStream;
OutputStream osToUse = outputStream;
if (this.debugLogger != null && this.debugLogger.isDebugEnabled()) {
PrintWriter debugWriter = new PrintWriter(new CommonsLogWriter(this.debugLogger));
isToUse = new HessianDebugInputStream(inputStream, debugWriter);
if (debugOutputStreamAvailable) {
osToUse = DebugStreamFactory.createDebugOutputStream(outputStream, debugWriter);
}
}
Hessian2Input in = new Hessian2Input(isToUse);
if (this.serializerFactory != null) {
in.setSerializerFactory(this.serializerFactory);
}
int code = in.read();
if (code != 'c') {
throw new IOException("expected 'c' in hessian input at " + code);
}
AbstractHessianOutput out = null;
int major = in.read();
int minor = in.read();
if (major >= 2) {
out = new Hessian2Output(osToUse);
}
else {
out = new HessianOutput(osToUse);
}
if (this.serializerFactory != null) {
out.setSerializerFactory(this.serializerFactory);
}
try {
this.skeleton.invoke(in, out);
}
finally {
try {
in.close();
isToUse.close();
}
catch (IOException ex) {
}
try {
out.close();
osToUse.close();
}
catch (IOException ex) {
}
}
}
/**
* Inner class to avoid hard dependency on Hessian 3.1.3's HessianDebugOutputStream.
*/
private static class DebugStreamFactory {
public static OutputStream createDebugOutputStream(OutputStream os, PrintWriter debug) {
return new HessianDebugOutputStream(os, debug);
}
}
}