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• RemoteMethodInvocationHandler.java

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jadex.platform.service.remote.RemoteMethodInvocationHandler Maven / Gradle / Ivy

package jadex.platform.service.remote;

import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.util.HashMap;
import java.util.Map;

import jadex.bridge.IComponentIdentifier;
import jadex.bridge.IComponentStep;
import jadex.bridge.IExternalAccess;
import jadex.bridge.IInternalAccess;
import jadex.bridge.ITargetResolver;
import jadex.bridge.ServiceCall;
import jadex.bridge.service.IServiceIdentifier;
import jadex.bridge.service.annotation.SecureTransmission;
import jadex.bridge.service.annotation.Timeout;
import jadex.bridge.service.component.ISwitchCall;
import jadex.bridge.service.component.ServiceInvocationContext;
import jadex.bridge.service.component.interceptors.CallAccess;
import jadex.bridge.service.component.interceptors.IntelligentProxyInterceptor;
import jadex.commons.SReflect;
import jadex.commons.SUtil;
import jadex.commons.future.DelegationResultListener;
import jadex.commons.future.Future;
import jadex.commons.future.IFuture;
import jadex.commons.future.IIntermediateFuture;
import jadex.commons.future.IPullIntermediateFuture;
import jadex.commons.future.IPullSubscriptionIntermediateFuture;
import jadex.commons.future.ISubscriptionIntermediateFuture;
import jadex.commons.future.ITerminableFuture;
import jadex.commons.future.ITerminableIntermediateFuture;
import jadex.commons.future.ITuple2Future;
import jadex.commons.future.IntermediateFuture;
import jadex.commons.future.PullIntermediateDelegationFuture;
import jadex.commons.future.PullSubscriptionIntermediateDelegationFuture;
import jadex.commons.future.SubscriptionIntermediateDelegationFuture;
import jadex.commons.future.TerminableDelegationFuture;
import jadex.commons.future.TerminableIntermediateDelegationFuture;
import jadex.commons.future.Tuple2Future;
import jadex.commons.transformation.annotations.Classname;
import jadex.platform.service.remote.commands.RemoteFuturePullCommand;
import jadex.platform.service.remote.commands.RemoteFutureTerminationCommand;
import jadex.platform.service.remote.commands.RemoteMethodInvocationCommand;

/**
 *  Class that implements the Java proxy InvocationHandler, which
 *  is called when a method on a proxy is called.
 */
public class RemoteMethodInvocationHandler implements InvocationHandler, ISwitchCall //extends MethodListenerHandler
{
	protected static final Method schedulestep;
	
	protected static final Method finalize;
	
	static
	{
		try
		{
			finalize = IFinalize.class.getMethod("finalize", new Class[0]);
			schedulestep = IExternalAccess.class.getMethod("scheduleStep", new Class[]{IComponentStep.class});
		}
		catch(Exception e)
		{
			throw new RuntimeException(e);
		}
	}
	
	//-------- attributes --------
	
	/** The remote service management service. */
	protected RemoteServiceManagementService rsms;

	/** The proxy reference. */
	protected ProxyReference pr;
	
	/** The target resolver. */
	protected ITargetResolver tr;
		
	//-------- constructors --------
	
	/**
	 *  Create a new invocation handler.
	 */
	public RemoteMethodInvocationHandler(RemoteServiceManagementService rsms, ProxyReference pr)
	{
		this.rsms = rsms;
		this.pr = pr;
//		System.out.println("handler: "+pi.getServiceIdentifier().getServiceType()+" "+pi.getCache());
	}
	
	//-------- methods --------
	
//	public static Object debugcallid	= null;	
	
	/**
	 *  Invoke a method.
	 */
	public Object invoke(final Object proxy, final Method method, final Object[] args) throws Throwable
	{		
		final IComponentIdentifier compid = rsms.getRMSComponentIdentifier();
		final String callid = SUtil.createUniqueId(compid.getName()+".0."+method.toString());
	
//		notifyMethodListeners(true, proxy, method, args, callid);
		
		final ProxyInfo pi = pr.getProxyInfo();
		
		if(pi.isExcluded(method)) 
			throw new UnsupportedOperationException("The method is excluded for remote: " + method);
		
		// Determine if call goes to
		// a) cached method
		// b) method replacement
		// c) finalize method
		// d) real method invocation
		
		if(pr.getCache()!=null && !pi.isUncached(method) && !pi.isReplaced(method))
		{
			Class rt = method.getReturnType();
			Class[] ar = method.getParameterTypes();
			if(!rt.equals(void.class) && !(SReflect.isSupertype(IFuture.class, rt)) && ar.length==0)
			{
				Object res = pr.getCache().get(method.getName());
				if(res instanceof Throwable && SReflect.isSupertype(Throwable.class, rt))
				{
					throw (Throwable)res;
				}
				else
				{
					return res;
				}
			}
		}
		
		// Test if method has a replacement command.
		IMethodReplacement	replacement	= pi.getMethodReplacement(method);
		if(replacement!=null)
		{
			// Todo: super pointer for around-advice-like replacements.
			return replacement.invoke(proxy, args);
		}
		
		// Test if finalize is called.
		if(finalize.equals(method))
		{
//			System.out.println("Finalize called on: "+proxy);
			try
			{
				rsms.component.scheduleStep(new IComponentStep()
				{
					@Classname("fin")
					public IFuture execute(IInternalAccess ia)
					{
						rsms.getRemoteReferenceModule().decProxyCount(pr.getRemoteReference());
						return IFuture.DONE;
					}
				});
			}
			catch(Exception e)
			{
				// Finalize is called internally -> Exception pop up to the console :-(
				System.out.println("Warning, could not call finalize method: "+rsms.component.getComponentIdentifier()+" "+proxy);
			}
			return null;
		}
		
		final ServiceInvocationContext sic = ServiceInvocationContext.SICS.get();
		ServiceInvocationContext.SICS.remove();
		
		// Get the current service invocation 
//		ServiceCall invoc = ServiceCall.getCurrentInvocation();
		Map	props	= new HashMap();
//		props.put("method2", method.getName());
		// Must use call from ServiceCall because could not have required chain
		ServiceCall invoc = ServiceCall.getOrCreateNextInvocation(props);
//		ServiceCall invoc = sic.getServiceCall();
		
		// The reatime property is not necessary, as currently message are sent with realtime timeouts always  
		
//		if(method.getName().indexOf("schedule")!=-1)
//		System.out.println("step: "+method.getName()+", "+invoc);
		
		Map nf = invoc!=null? invoc.getProperties(): new HashMap();
		boolean sec = pi.isSecure(method);
		if(sec)
			nf.put(SecureTransmission.SECURE_TRANSMISSION, sec? Boolean.TRUE: Boolean.FALSE);
		final long to = invoc!=null && invoc.hasUserTimeout()? invoc.getTimeout(): pi.getMethodTimeout(rsms.getComponent().getComponentIdentifier(), method);
		nf.put(Timeout.TIMEOUT, Long.valueOf(to));
		final Map nonfunc = nf; 
		
		Class type = determineReturnType(proxy, method, args);
		Future