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

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


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

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


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

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


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

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


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

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         *  applied to the given client method constraints.
         */
        private static TxnManager constrainServer(TxnManager server,
                                                MethodConstraints constraints)
        {
            RemoteMethodControl constrainedServer = 
                ((RemoteMethodControl)server).setConstraints(constraints);


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

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


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

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  MethodConstraints constraints, Method[] mapping)
    {
  final MethodConstraints serverRefConstraints 
      = ConstrainableProxyUtil.translateConstraints(constraints,
                mapping);
  final RemoteMethodControl constrainedServer = 
      ((RemoteMethodControl)server).
      setConstraints(serverRefConstraints);


  return (Landlord)constrainedServer;
    }

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          new Object[] { obj, ctx });
  }
  if (obj == null || ctx == null) {
      throw new NullPointerException("Arguments must not be null");
  }
  RemoteMethodControl otherServerProxy;
  Uuid inputProxyID = null;
  if (obj instanceof TxnMgrProxy.ConstrainableTxnMgrProxy) {
      otherServerProxy = (RemoteMethodControl) 
    ((TxnMgrProxy)obj).backend;
      inputProxyID = ((ReferentUuid)obj).getReferentUuid();
  } else if (obj instanceof ConstrainableLandlordLease) {
      final LandlordProxyVerifier lpv =
    new LandlordProxyVerifier((Landlord)serverProxy, proxyID);
      return lpv.isTrustedObject(obj, ctx);
  } else if (
      obj instanceof TxnMgrAdminProxy.ConstrainableTxnMgrAdminProxy) {
      otherServerProxy = (RemoteMethodControl) 
    ((TxnMgrAdminProxy)obj).server;
      inputProxyID = ((ReferentUuid)obj).getReferentUuid();
  } else if (obj instanceof TxnManager &&
             obj instanceof RemoteMethodControl) {
      otherServerProxy = (RemoteMethodControl)obj;
      inputProxyID = proxyID;
  } else {
      logger.log(Level.FINEST, "Object {0} is not a supported type",
    obj);
      return false;
  }


  // For top-level proxies, quickly verify proxy Uuid
  if ((inputProxyID != null) &&
      !(proxyID.equals(inputProxyID))) {
      return false;
  }


  MethodConstraints mc = otherServerProxy.getConstraints();
  TrustEquivalence trusted =
      (TrustEquivalence) serverProxy.setConstraints(mc);
  boolean result = trusted.checkTrustEquivalence(otherServerProxy);
  if (logger.isLoggable(Level.FINER)) {
      logger.exiting(ProxyVerifier.class.getName(), "isTrustedObject",

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   *  - ConstrainableParticipantProxy
   *  - ConstrainableLandlordLease (via LandlordProxyVerifier)
         */


  // Server reference from input proxy
        final RemoteMethodControl inputProxyServer;
  final Uuid inputProxyUuid; 
        if (obj instanceof ConstrainableSpaceProxy2) {
      final ConstrainableSpaceProxy2 csp = (ConstrainableSpaceProxy2)obj;


      inputProxyUuid = csp.getReferentUuid();
            inputProxyServer = (RemoteMethodControl)csp.space;
        } else if (obj instanceof ConstrainableAdminProxy) {
      final ConstrainableAdminProxy cap = (ConstrainableAdminProxy)obj;


      inputProxyUuid = cap.getReferentUuid();
            inputProxyServer = (RemoteMethodControl)cap.admin;
  } else if (obj instanceof ConstrainableParticipantProxy) {
      final ConstrainableParticipantProxy cpp = 
    (ConstrainableParticipantProxy)obj;


      inputProxyUuid = cpp.getReferentUuid();
      inputProxyServer = (RemoteMethodControl)cpp.space;
  } else if (obj instanceof OutriggerServer &&
       obj instanceof RemoteMethodControl) 
  {
      // obj may be our inner proxy, which does not hold
      // a ref to uuid, to simplify the logic just make
      // inputProxyUuid = uuid.
      inputProxyUuid = uuid;
      inputProxyServer = (RemoteMethodControl)obj;
        } else {
      final LandlordProxyVerifier lpv = 
    new LandlordProxyVerifier((Landlord)server, uuid);
      return lpv.isTrustedObject(obj, ctx);
        }


  // Check Uuid first
  if (!uuid.equals(inputProxyUuid))
      return false;


        /* Get the client constraints currently set on the server reference
   * of contained in the input proxy 
   */
        final MethodConstraints mConstraints = 
      inputProxyServer.getConstraints();


        /* Create a copy of the canonical server reference with its method
   * constraints replaced with the method constraints on
   * server reference of the input proxy.
         */

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


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

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