package org.rzo.netty.ahessian.rpc.client;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.concurrent.Future;
import java.util.concurrent.TimeUnit;

/**
 * A proxy object implementing synchronous invocations. <br>
 * Typical usage:
 * 
 * <pre>
 * HessianProxyFactory proxyFactory = ...
 * 
 * Map options = new HashMap();
 * options.put("id", "myServiceName");
 * options.put("synch", Boolean.TRUE);
 * 
 * // AsynchMyServiceInterface is an interface including the same methods as MyServiceInterface 
 * //except that the return type is always of type HessianProxyFuture
 * AsynchMyServiceInterface service = (AsynchMyServiceInterface) factory.create(AsynchMyServiceInterface.class, getClassLoader(), options);
 * 
 * // invoke a service method and wait for the result
 * Object result = service.myMethod();
 * </pre>
 */
public class SyncHessianProxy implements InvocationHandler
{

	/** The _handler. */
	AsyncHessianProxy	_handler;
	long _defaultTimeout = -1;

	/**
	 * Instantiates a new sync hessian proxy.
	 * 
	 * @param handler
	 *            the handler
	 */
	SyncHessianProxy(InvocationHandler handler)
	{
		_handler = (AsyncHessianProxy) handler;
		if (_handler._options != null && _handler._options.get("timeout") != null)
			_defaultTimeout = ((Long)_handler._options.get("timeout")).longValue();
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see java.lang.reflect.InvocationHandler#invoke(java.lang.Object,
	 * java.lang.reflect.Method, java.lang.Object[])
	 */
	public Object invoke(Object proxy, Method method, Object[] args) throws Throwable
	{
		if ("equals".equals(method.getName()) || "hashCode".equals(method.getName()) || "getHessianType".equals(method.getName()) || "getHessianURL".equals(method.getName()))
			return _handler.invoke(proxy, method, args);
		if ("toString".equals(method.getName()))
			return "Sync:"+_handler.invoke(proxy, method, args);
		long timeout = getTimeout(method.getName());
		if (timeout > 0)
			return ((Future)_handler.invoke(proxy, method, args)).get(timeout, TimeUnit.MILLISECONDS);
		else
			return ((Future)_handler.invoke(proxy, method, args)).get();
	}
	
	  private long getTimeout(String method)
	  {
			if (_handler._options != null && _handler._options.get("timeout."+method) != null)
				return ((Long)_handler._options.get("timeout."+method)).longValue();
			return _defaultTimeout;
	  }


}