/*
* The Apache Software License, Version 1.1
*
* Copyright (c) 2001-2004 Caucho Technology, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution, if
* any, must include the following acknowlegement:
* "This product includes software developed by the
* Caucho Technology (http://www.caucho.com/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
*
* 4. The names "Burlap", "Resin", and "Caucho" must not be used to
* endorse or promote products derived from this software without prior
* written permission. For written permission, please contact
* info@caucho.com.
*
* 5. Products derived from this software may not be called "Resin"
* nor may "Resin" appear in their names without prior written
* permission of Caucho Technology.
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL CAUCHO TECHNOLOGY OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
* OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
* OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @author Scott Ferguson
*/
package com.caucho.burlap.client;
import com.caucho.burlap.io.AbstractBurlapInput;
import com.caucho.burlap.io.BurlapOutput;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
/**
* Proxy implementation for Burlap clients. Applications will generally
* use BurlapProxyFactory to create proxy clients.
*/
public class BurlapProxy implements InvocationHandler {
private BurlapProxyFactory _factory;
private URL _url;
BurlapProxy(BurlapProxyFactory factory, URL url)
{
_factory = factory;
_url = url;
}
/**
* Returns the proxy's URL.
*/
public URL getURL()
{
return _url;
}
/**
* Handles the object invocation.
*
* @param proxy the proxy object to invoke
* @param method the method to call
* @param args the arguments to the proxy object
*/
public Object invoke(Object proxy, Method method, Object []args)
throws Throwable
{
String methodName = method.getName();
Class []params = method.getParameterTypes();
// equals and hashCode are special cased
if (methodName.equals("equals") &&
params.length == 1 && params[0].equals(Object.class)) {
Object value = args[0];
if (value == null || ! Proxy.isProxyClass(value.getClass()))
return new Boolean(false);
BurlapProxy handler = (BurlapProxy) Proxy.getInvocationHandler(value);
return new Boolean(_url.equals(handler.getURL()));
}
else if (methodName.equals("hashCode") && params.length == 0)
return new Integer(_url.hashCode());
else if (methodName.equals("getBurlapType"))
return proxy.getClass().getInterfaces()[0].getName();
else if (methodName.equals("getBurlapURL"))
return _url.toString();
else if (methodName.equals("toString") && params.length == 0)
return "[BurlapProxy " + _url + "]";
InputStream is = null;
URLConnection conn = null;
HttpURLConnection httpConn = null;
try {
conn = _factory.openConnection(_url);
conn.setRequestProperty("Content-Type", "text/xml");
OutputStream os;
try {
os = conn.getOutputStream();
} catch (Exception e) {
throw new BurlapRuntimeException(e);
}
BurlapOutput out = _factory.getBurlapOutput(os);
if (! _factory.isOverloadEnabled()) {
}
else if (args != null)
methodName = methodName + "__" + args.length;
else
methodName = methodName + "__0";
out.call(methodName, args);
try {
os.flush();
} catch (Exception e) {
throw new BurlapRuntimeException(e);
}
if (conn instanceof HttpURLConnection) {
httpConn = (HttpURLConnection) conn;
int code = 500;
try {
code = httpConn.getResponseCode();
} catch (Exception e) {
}
if (code != 200) {
StringBuffer sb = new StringBuffer();
int ch;
try {
is = httpConn.getInputStream();
if (is != null) {
while ((ch = is.read()) >= 0)
sb.append((char) ch);
is.close();
}
is = httpConn.getErrorStream();
if (is != null) {
while ((ch = is.read()) >= 0)
sb.append((char) ch);
}
} catch (FileNotFoundException e) {
throw new BurlapRuntimeException(code + ": " + String.valueOf(e));
} catch (IOException e) {
}
if (is != null)
is.close();
throw new BurlapProtocolException(code + ": " + sb.toString());
}
}
is = conn.getInputStream();
AbstractBurlapInput in = _factory.getBurlapInput(is);
return in.readReply(method.getReturnType());
} catch (BurlapProtocolException e) {
throw new BurlapRuntimeException(e);
} finally {
try {
if (is != null)
is.close();
} catch (IOException e) {
}
if (httpConn != null)
httpConn.disconnect();
}
}
}