clientrequestinfoimpl.java

java1.6众多例子参考

/*
 * @(#)ClientRequestInfoImpl.java	1.46 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.corba.se.impl.interceptors;

import java.util.HashMap ;

import org.omg.CORBA.Any;
import org.omg.CORBA.BAD_INV_ORDER;
import org.omg.CORBA.BAD_PARAM;
import org.omg.CORBA.CompletionStatus;
import org.omg.CORBA.Context;
import org.omg.CORBA.ContextList;
import org.omg.CORBA.CTX_RESTRICT_SCOPE;
import org.omg.CORBA.ExceptionList;
import org.omg.CORBA.LocalObject;
import org.omg.CORBA.NamedValue;
import org.omg.CORBA.NO_IMPLEMENT;
import org.omg.CORBA.NO_RESOURCES;
import org.omg.CORBA.NVList;
import org.omg.CORBA.Object;
import org.omg.CORBA.ParameterMode;
import org.omg.CORBA.Policy;
import org.omg.CORBA.SystemException;
import org.omg.CORBA.TypeCode;
import org.omg.CORBA.INTERNAL;
import org.omg.CORBA.UserException;
import org.omg.CORBA.portable.ApplicationException;
import org.omg.CORBA.portable.InputStream;
import com.sun.corba.se.spi.servicecontext.ServiceContexts;
import com.sun.corba.se.spi.servicecontext.UnknownServiceContext;

import org.omg.IOP.ServiceContext;
import org.omg.IOP.ServiceContextHelper;
import org.omg.IOP.TaggedProfile;
import org.omg.IOP.TaggedProfileHelper;
import org.omg.IOP.TaggedComponent;
import org.omg.IOP.TaggedComponentHelper;
import org.omg.IOP.TAG_INTERNET_IOP;
import org.omg.Dynamic.Parameter;
import org.omg.PortableInterceptor.ClientRequestInfo;
import org.omg.PortableInterceptor.LOCATION_FORWARD;
import org.omg.PortableInterceptor.SUCCESSFUL;
import org.omg.PortableInterceptor.SYSTEM_EXCEPTION;
import org.omg.PortableInterceptor.TRANSPORT_RETRY;
import org.omg.PortableInterceptor.USER_EXCEPTION;

import com.sun.corba.se.pept.protocol.MessageMediator;

import com.sun.corba.se.spi.ior.IOR;
import com.sun.corba.se.spi.ior.iiop.IIOPProfileTemplate;
import com.sun.corba.se.spi.ior.iiop.GIOPVersion;
import com.sun.corba.se.spi.orb.ORB;
import com.sun.corba.se.spi.protocol.CorbaMessageMediator;
import com.sun.corba.se.spi.transport.CorbaContactInfo;
import com.sun.corba.se.spi.transport.CorbaContactInfoList;
import com.sun.corba.se.spi.transport.CorbaContactInfoListIterator;

import com.sun.corba.se.impl.encoding.CDROutputStream;
import com.sun.corba.se.impl.encoding.CDRInputStream_1_0;
import com.sun.corba.se.impl.orbutil.ORBUtility;
import com.sun.corba.se.impl.protocol.CorbaInvocationInfo;
import com.sun.corba.se.impl.util.RepositoryId;

/**
 * Implementation of the ClientRequestInfo interface as specified in
 * orbos/99-12-02 section 5.4.2.
 */
public final class ClientRequestInfoImpl 
    extends RequestInfoImpl 
    implements ClientRequestInfo 
{

    // The available constants for startingPointCall
    static final int CALL_SEND_REQUEST = 0;
    static final int CALL_SEND_POLL = 1;
    
    // The available constants for endingPointCall
    static final int CALL_RECEIVE_REPLY = 0;
    static final int CALL_RECEIVE_EXCEPTION = 1;
    static final int CALL_RECEIVE_OTHER = 2;

    //////////////////////////////////////////////////////////////////////
    //
    // NOTE: IF AN ATTRIBUTE IS ADDED, PLEASE UPDATE RESET();
    //
    //////////////////////////////////////////////////////////////////////
    
    // The current retry request status.  True if this request is being 
    // retried and this info object is to be reused, or false otherwise.
    private boolean retryRequest;
    
    // The number of times this info object has been (re)used.  This is
    // incremented every time a request is retried, and decremented every
    // time a request is complete.  When this reaches zero, the info object
    // is popped from the ClientRequestInfoImpl ThreadLocal stack in the ORB.
    private int entryCount = 0;

    // The RequestImpl is set when the call is DII based.
    // The DII query calls like ParameterList, ExceptionList,
    // ContextList will be delegated to RequestImpl.
    private org.omg.CORBA.Request request;

    // Sources of client request information
    private boolean diiInitiate;
    private CorbaMessageMediator messageMediator;

    // Cached information:
    private org.omg.CORBA.Object cachedTargetObject;
    private org.omg.CORBA.Object cachedEffectiveTargetObject;
    private Parameter[] cachedArguments;
    private TypeCode[] cachedExceptions;
    private String[] cachedContexts;
    private String[] cachedOperationContext;
    private String cachedReceivedExceptionId;
    private Any cachedResult;
    private Any cachedReceivedException;
    private TaggedProfile cachedEffectiveProfile;
    // key = Integer, value = IOP.ServiceContext.
    private HashMap cachedRequestServiceContexts;
    // key = Integer, value = IOP.ServiceContext.
    private HashMap cachedReplyServiceContexts;
    // key = Integer, value = TaggedComponent
    private HashMap cachedEffectiveComponents;


    protected boolean piCurrentPushed;
    
    //////////////////////////////////////////////////////////////////////
    //
    // NOTE: IF AN ATTRIBUTE IS ADDED, PLEASE UPDATE RESET();
    //
    //////////////////////////////////////////////////////////////////////
    
    /**
     * Reset the info object so that it can be reused for a retry,
     * for example.
     */
    void reset() {
        super.reset();

	// Please keep these in the same order that they're declared above.
        
        retryRequest = false;

        // Do not reset entryCount because we need to know when to pop this
        // from the stack.

        request = null;
	diiInitiate = false;
	messageMediator = null;

	// Clear cached attributes:
	cachedTargetObject = null;
	cachedEffectiveTargetObject = null;
	cachedArguments = null;
	cachedExceptions = null;
	cachedContexts = null;
	cachedOperationContext = null;
	cachedReceivedExceptionId = null;
	cachedResult = null;
	cachedReceivedException = null;
	cachedEffectiveProfile = null;
	cachedRequestServiceContexts = null;
	cachedReplyServiceContexts = null;
        cachedEffectiveComponents = null;

	piCurrentPushed = false;

        startingPointCall = CALL_SEND_REQUEST;
        endingPointCall = CALL_RECEIVE_REPLY;

    }
    
    /*
     **********************************************************************
     * Access protection
     **********************************************************************/
    
    // Method IDs for all methods in ClientRequestInfo.  This allows for a 
    // convenient O(1) lookup for checkAccess().
    protected static final int MID_TARGET                  = MID_RI_LAST + 1;
    protected static final int MID_EFFECTIVE_TARGET        = MID_RI_LAST + 2;
    protected static final int MID_EFFECTIVE_PROFILE       = MID_RI_LAST + 3;
    protected static final int MID_RECEIVED_EXCEPTION      = MID_RI_LAST + 4;
    protected static final int MID_RECEIVED_EXCEPTION_ID   = MID_RI_LAST + 5;
    protected static final int MID_GET_EFFECTIVE_COMPONENT = MID_RI_LAST + 6;
    protected static final int MID_GET_EFFECTIVE_COMPONENTS
                                                           = MID_RI_LAST + 7;
    protected static final int MID_GET_REQUEST_POLICY      = MID_RI_LAST + 8;
    protected static final int MID_ADD_REQUEST_SERVICE_CONTEXT 
                                                           = MID_RI_LAST + 9;
    
    // ClientRequestInfo validity table (see ptc/00-08-06 table 21-1).
    // Note: These must be in the same order as specified in contants.
    protected static final boolean validCall[][] = {
        // LEGEND:
        // s_req = send_request     r_rep = receive_reply
        // s_pol = send_poll        r_exc = receive_exception
        //                          r_oth = receive_other
        //
        // A true value indicates call is valid at specified point.  
        // A false value indicates the call is invalid.
        //
        //
        // NOTE: If the order or number of columns change, update 
        // checkAccess() accordingly.
        //
        //                              { s_req, s_pol, r_rep, r_exc, r_oth }
        // RequestInfo methods:
        /*request_id*/                  { true , true , true , true , true  },
        /*operation*/                   { true , true , true , true , true  },
        /*arguments*/                   { true , false, true , false, false },
        /*exceptions*/                  { true , false, true , true , true  },
        /*contexts*/                    { true , false, true , true , true  },
        /*operation_context*/           { true , false, true , true , true  },
        /*result*/                      { false, false, true , false, false },
        /*response_expected*/           { true , true , true , true , true  },
        /*sync_scope*/                  { true , false, true , true , true  },
        /*reply_status*/                { false, false, true , true , true  },
        /*forward_reference*/           { false, false, false, false, true  },
        /*get_slot*/                    { true , true , true , true , true  },
        /*get_request_service_context*/ { true , false, true , true , true  },
        /*get_reply_service_context*/   { false, false, true , true , true  },
        //
        // ClientRequestInfo methods::
        /*target*/                      { true , true , true , true , true  },
        /*effective_target*/            { true , true , true , true , true  },
        /*effective_profile*/           { true , true , true , true , true  },
        /*received_exception*/          { false, false, false, true , false },
        /*received_exception_id*/       { false, false, false, true , false },
        /*get_effective_component*/     { true , false, true , true , true  },
        /*get_effective_components*/    { true , false, true , true , true  },
        /*get_request_policy*/          { true , false, true , true , true  },
        /*add_request_service_context*/ { true , false, false, false, false }
    };
    

    /*
     **********************************************************************
     * Public ClientRequestInfo interfaces
     **********************************************************************/
    
    /**
     * Creates a new ClientRequestInfo implementation.
     * The constructor is package scope since no other package need create
     * an instance of this class.
     */
    protected ClientRequestInfoImpl( ORB myORB ) { 
        super( myORB ); 
        startingPointCall = CALL_SEND_REQUEST;
        endingPointCall = CALL_RECEIVE_REPLY;
    }
    
    /**
     * The object which the client called to perform the operation.
     */
    public org.omg.CORBA.Object target (){
	// access is currently valid for all states:
        //checkAccess( MID_TARGET );
	if (cachedTargetObject == null) {
	    CorbaContactInfo corbaContactInfo = (CorbaContactInfo)
		messageMediator.getContactInfo();
	    cachedTargetObject =
		iorToObject(corbaContactInfo.getTargetIOR());
	}
	return cachedTargetObject;
    }
    
    /**
     * The actual object on which the operation will be invoked.  If the 
     * reply_status is LOCATION_FORWARD, then on subsequent requests, 
     * effective_target will contain the forwarded IOR while target will 
     * remain unchanged.  
     */
    public org.omg.CORBA.Object effective_target() {
	// access is currently valid for all states:
        //checkAccess( MID_EFFECTIVE_TARGET );

        // Note: This is not necessarily the same as locatedIOR.
        // Reason: See the way we handle COMM_FAILURES in 
        // ClientRequestDispatcher.createRequest, v1.32

	if (cachedEffectiveTargetObject == null) {
	    CorbaContactInfo corbaContactInfo = (CorbaContactInfo)
		messageMediator.getContactInfo();
	    // REVISIT - get through chain like getLocatedIOR helper below.
	    cachedEffectiveTargetObject =
		iorToObject(corbaContactInfo.getEffectiveTargetIOR());
	}
	return cachedEffectiveTargetObject;
    }
    
    /**
     * The profile that will be used to send the request.  If a location 
     * forward has occurred for this operation's object and that object's 
     * profile change accordingly, then this profile will be that located 
     * profile.
     */
    public TaggedProfile effective_profile (){
        // access is currently valid for all states:
        //checkAccess( MID_EFFECTIVE_PROFILE );

	if( cachedEffectiveProfile == null ) {
	    CorbaContactInfo corbaContactInfo = (CorbaContactInfo)
		messageMediator.getContactInfo();
	    cachedEffectiveProfile =
		corbaContactInfo.getEffectiveProfile().getIOPProfile();
	}

	// Good citizen: In the interest of efficiency, we assume interceptors
	// will not modify the returned TaggedProfile in any way so we need
	// not make a deep copy of it.

	return cachedEffectiveProfile;
    }