Examples of net.jini.core.constraint.RemoteMethodControl

net.jini.core.constraint.RemoteMethodControl
Defines an interface to proxies for setting constraints to control remote method calls. If a proxy implements this interface, then the semantics of this interface apply to all calls through all remote methods defined by the proxy; there is no mechanism to exempt remote methods or remote interfaces from these semantics.
Constraints for a remote call come from two sources:
- Constraints imposed by the server (including any minimum constraints imposed by the communication mechanism used between the proxy and server)
- Constraints placed on a proxy by the client
The server constraints are controlled by the proxy implementation; they are not exposed to the client, and might vary in ways unknown to the client (for example, vary by method or over time). The client should set the constraints it wants rather than assuming that the server imposes particular constraints. Client constraints placed on a proxy apply to all remote calls made through that particular proxy by any thread, and the client can specify different constraints for each remote method.
A remote call will be performed only if the combined requirements (from both sources) can be satisfied. If the combined requirements cannot be satisfied, a {@link java.rmi.ConnectIOException} will be thrown by theremote call, typically containing (but not required to contain) a nested {@link net.jini.io.UnsupportedConstraintException}. In addition to the requirements, both client and server preferences will be satisfied, to the extent possible.
Note that constraints imposed by the communication mechanism must be factored into the requirements. For example, if the only explicit requirement is Delegation.YES, but the communication mechanism always requires client authentication, then effectively a ClientAuthentication.YES requirement exists, and so the Delegation.YES requirement must also be satisfied.
The constraint mechanisms are designed such that client constraints do not weaken server constraints, and vice versa. However, it is certainly possible to specify conflicting constraints. Preferences that conflict with requirements are ignored, and if preferences conflict with each other it is arbitrary as to which (if any) are satisfied, but if there are conflicting requirements the remote call will not be made. @author Sun Microsystems, Inc. @since 2.0

  throws RemoteException
    {
  if (obj == null || ctx == null) {
      throw new NullPointerException();
  }
  RemoteMethodControl inputServer;
  ServiceID inputRegistrarID;
  if (obj instanceof ConstrainableRegistrarProxy) {
      RegistrarProxy proxy = (RegistrarProxy) obj;
      inputServer = (RemoteMethodControl) proxy.server;
      inputRegistrarID = proxy.registrarID;
  } else if (obj instanceof ConstrainableAdminProxy) {
      AdminProxy proxy = (AdminProxy) obj;
      inputServer = (RemoteMethodControl) proxy.server;
      inputRegistrarID = proxy.registrarID;
  } else if (obj instanceof ConstrainableRegistration) {
      Registration reg = (Registration) obj;
      if (!isTrustedObject(reg.lease, ctx)) {
    return false;
      }
      inputServer = (RemoteMethodControl) reg.server;
      inputRegistrarID = registrarID;
  } else if (obj instanceof ConstrainableEventLease ||
       obj instanceof ConstrainableServiceLease)
  {
      RegistrarLease lease = (RegistrarLease) obj;
      inputServer = (RemoteMethodControl) lease.server;
      inputRegistrarID = lease.registrarID;
  } else if (obj instanceof RemoteMethodControl) {
      inputServer = (RemoteMethodControl) obj;
      inputRegistrarID = registrarID;
  } else {
      return false;
  }


  TrustEquivalence trustEquiv = (TrustEquivalence)
      server.setConstraints(inputServer.getConstraints());
  return trustEquiv.checkTrustEquivalence(inputServer) &&
         registrarID.equals(inputRegistrarID);
    }

View Full Code Here

        MethodConstraints constraints)
    {
  final MethodConstraints serverRefConstraints 
      = ConstrainableProxyUtil.translateConstraints(constraints,
                methodMapArray);
  final RemoteMethodControl constrainedServer = 
      ((RemoteMethodControl)server).
      setConstraints(serverRefConstraints);


  return (OutriggerServer)constrainedServer;
    }

View Full Code Here

  if (obj == null || ctx == null) {
      throw new NullPointerException();
  } else if (!(obj instanceof RemoteMethodControl)) {
      return false;
  }
  RemoteMethodControl unverifiedProxy = (RemoteMethodControl) obj;
  MethodConstraints constraints = unverifiedProxy.getConstraints();
  TrustEquivalence trustedProxy =
      (TrustEquivalence) proxy.setConstraints(constraints);
  return trustedProxy.checkTrustEquivalence(unverifiedProxy);
    }

View Full Code Here

     */
    public RemoteMethodControl setConstraints(MethodConstraints constraints) {
  MethodConstraints actConstraints =
      ConstrainableProxyUtil.translateConstraints(constraints,
              methodMapping);
  RemoteMethodControl act =
      ((RemoteMethodControl) activator).setConstraints(actConstraints);
  return new ConstrainableAID((Activator) act, uid, constraints);
    }

View Full Code Here

      if (obj == null || ctx == null) {
    throw new NullPointerException();
      } else if (!(obj instanceof ConstrainableAID)) {
    return false;
      }
      RemoteMethodControl act =
    (RemoteMethodControl) ((ConstrainableAID) obj).activator;
      MethodConstraints mc = act.getConstraints();
      TrustEquivalence trusted =
    (TrustEquivalence) activator.setConstraints(mc);
      return trusted.checkTrustEquivalence(act);
  }

View Full Code Here

    endpoint,
    UuidFactory.create("57117a56-2750-11b2-b312-080020c9e4a1"),
    false);
  InvocationHandler invocationHandler =
      new BasicInvocationHandler(objectEndpoint, null);
  RemoteMethodControl proxy =
      (RemoteMethodControl) Proxy.newProxyInstance(
     TestConnectTimeout.class.getClassLoader(),
     new Class[] { Ping.class, RemoteMethodControl.class },
     invocationHandler);


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    new ConnectionRelativeTime(TIMEOUT),
    null
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    ConstraintAlternatives.create(new InvocationConstraint[] {
        new ConnectionRelativeTime(TIMEOUT),
        new ConnectionRelativeTime(TIMEOUT + 1)
    }),
    null
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    null,
    new ConnectionRelativeTime(TIMEOUT)))));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    null,
    ConstraintAlternatives.create(new InvocationConstraint[] {
        new ConnectionRelativeTime(TIMEOUT),
        new ConnectionRelativeTime(TIMEOUT + 1)
    })
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    new ConnectionAbsoluteTime(System.currentTimeMillis()),
    null
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    ConstraintAlternatives.create(new InvocationConstraint[] {
        new ConnectionAbsoluteTime(System.currentTimeMillis()),
        new ConnectionAbsoluteTime(System.currentTimeMillis() + 1)
    }),
    null
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    null,
    new ConnectionAbsoluteTime(System.currentTimeMillis())
      ))
  ));


  tryProxy(proxy.setConstraints(
      new BasicMethodConstraints(new InvocationConstraints(
    null,
    ConstraintAlternatives.create(new InvocationConstraint[] {
        new ConnectionAbsoluteTime(System.currentTimeMillis()),
        new ConnectionAbsoluteTime(System.currentTimeMillis() + 1)

View Full Code Here

                                                       throws RemoteException
        {
            if (obj == null || ctx == null) {
                throw new NullPointerException("arguments must not be null");
            }//endif
            RemoteMethodControl inputProxy;
            Uuid inputProxyID;
            if(obj instanceof TestServiceProxy.ConstrainableTestServiceProxy) {
                inputProxy =
                       (RemoteMethodControl)((TestServiceProxy)obj).innerProxy;
                inputProxyID = ((ReferentUuid)obj).getReferentUuid();
            } else if( obj instanceof RemoteMethodControl ) {
                inputProxy = (RemoteMethodControl)obj;
                inputProxyID = proxyID;
            } else {
                return false;
            }//endif
            final MethodConstraints mConstraints = inputProxy.getConstraints();
            final TrustEquivalence constrainedInnerProxy =
                     (TrustEquivalence)innerProxy.setConstraints(mConstraints);
            return (    constrainedInnerProxy.checkTrustEquivalence(inputProxy)
                     && proxyID.equals(inputProxyID) );
        }//end isTrustedObject

View Full Code Here

  throws RemoteException
    {
  if (obj == null || ctx == null) {
      throw new NullPointerException();
  }
  RemoteMethodControl inputServer;
  if (obj instanceof LookupSimulatorConstrainableProxy) {
      inputServer = (RemoteMethodControl) ((LookupSimulatorProxy) obj).server;
  } else {
      return false;
  }


  TrustEquivalence trustEquiv = (TrustEquivalence)
      server.setConstraints(inputServer.getConstraints());
  return trustEquiv.checkTrustEquivalence(inputServer);
    }

View Full Code Here

                                                MethodConstraints constraints )
        {
            MethodConstraints newConstraints 
               = ConstrainableProxyUtil.translateConstraints(constraints,
                                                             methodMapArray);
            RemoteMethodControl constrainedServer = 
                ((RemoteMethodControl)server).setConstraints(newConstraints);


            return ((Fiddler)constrainedServer);
        }//end constrainServer

View Full Code Here

         *  - ConstrainableFiddlerProxy
         *  - ConstrainableFiddlerRegistration
         *  - ConstrainableFiddlerLease
         *  - ConstrainableFiddlerAdminProxy
         */
        RemoteMethodControl inputProxy;
        Uuid inputProxyID;
        if( obj instanceof FiddlerProxy.ConstrainableFiddlerProxy ) {
            inputProxy = (RemoteMethodControl)((FiddlerProxy)obj).server;
            inputProxyID = ((ReferentUuid)obj).getReferentUuid();
        } else if
          (obj instanceof FiddlerRegistration.ConstrainableFiddlerRegistration)
        {
            FiddlerRegistration reg = (FiddlerRegistration)obj;
            if( !this.isTrustedObject( (reg.eventReg).getSource(), ctx) ) {
                return false;
            }//endif
            if( !this.isTrustedObject( (reg.eventReg).getLease(), ctx) ) {
                return false;
            }//endif
            inputProxy = (RemoteMethodControl)reg.server;
            /* FiddlerRegistration doesn't carry a proxyID. Default to the
             * cannonical proxyID to avoid complicated handler logic below.
             */
            inputProxyID = proxyID;
        } else if( obj instanceof FiddlerLease.ConstrainableFiddlerLease ) {
            inputProxy = (RemoteMethodControl)((FiddlerLease)obj).server;
            inputProxyID = ((FiddlerLease)obj).getServerID();
        } else if
             (obj instanceof FiddlerAdminProxy.ConstrainableFiddlerAdminProxy)
        {
            inputProxy = (RemoteMethodControl)((FiddlerAdminProxy)obj).server;
            inputProxyID = ((ReferentUuid)obj).getReferentUuid();
        } else if( obj instanceof RemoteMethodControl ) {
            /* This block handles the case where the inner proxy itself 
             * (rather than an outer proxy that contains the inner proxy)
             * is being verified for trust. Unlike most of the outer proxies,
             * the inner proxy doesn't provide a means for obtaining the UUID
             * of the associated backend server. Thus, to avoid complicated
             * handler logic, for this case the cannonical proxyID is used
             * in the trust equivalence comparison that is performed below.
             */
            inputProxy = (RemoteMethodControl)obj;
            inputProxyID = proxyID;
        } else {
            return false;
        }//endif
        /* Get the client constraints currently set on the input proxy */
        final MethodConstraints mConstraints 
                                        = inputProxy.getConstraints();
        /* Create a copy of the canonical proxy with its method constraints
         * replaced with the method constraints of the input proxy.
         */
        final TrustEquivalence constrainedInnerProxy =
             (TrustEquivalence)innerProxy.setConstraints(mConstraints);

View Full Code Here

0 1 2 3 4 5

TOP

Related Classes of net.jini.core.constraint.RemoteMethodControl

com.sun.jini.example.hello.Proxy$Verifier

com.sun.jini.fiddler.FiddlerAdminProxy$ConstrainableFiddlerAdminProxy

com.sun.jini.fiddler.FiddlerLease$ConstrainableFiddlerLease

com.sun.jini.fiddler.FiddlerLeaseMap$ConstrainableFiddlerLeaseMap

com.sun.jini.fiddler.FiddlerProxy$ConstrainableFiddlerProxy

com.sun.jini.fiddler.FiddlerRegistration$ConstrainableFiddlerRegistration

com.sun.jini.fiddler.ProxyVerifier

com.sun.jini.landlord.ConstrainableLandlordLease

com.sun.jini.landlord.LandlordProxyVerifier

com.sun.jini.mahalo.ProxyVerifier

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.