Examples of java.rmi.server.ObjID

java.rmi.server.ObjID
An ObjID is used to identify a remote object exported to an RMI runtime. When a remote object is exported, it is assigned an object identifier either implicitly or explicitly, depending on the API used to export.
The {@link #ObjID()} constructor can be used to generate a uniqueobject identifier. Such an ObjID is unique over time with respect to the host it is generated on. The {@link #ObjID(int)} constructor can be used to create a"well-known" object identifier. The scope of a well-known ObjID depends on the RMI runtime it is exported to.
An ObjID instance contains an object number (of type long) and an address space identifier (of type {@link UID}). In a unique ObjID, the address space identifier is unique with respect to a given host over time. In a well-known ObjID, the address space identifier is equivalent to one returned by invoking the {@link UID#UID(short)}constructor with the value zero.
If the system property java.rmi.server.randomIDs is defined to equal the string "true" (case insensitive), then the {@link #ObjID()} constructor will use a cryptographicallystrong random number generator to choose the object number of the returned ObjID. @author Ann Wollrath @author Peter Jones @version 1.31, 06/02/23 @since JDK1.1

        {
            /* Server ref must be created and assigned before remote object
             * 'this' can be exported.
             */
            LiveRef lref =
                new LiveRef(new ObjID(ObjID.ACTIVATOR_ID), port, null, ssf);
            UnicastServerRef uref = new UnicastServerRef(lref);
            ref = uref;
            uref.exportObject(this, null, false);
        }

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            throws RemoteException
        {
            /* Server ref must be created and assigned before remote object
             * 'this' can be exported.
             */
            LiveRef lref = new LiveRef(new ObjID(4), port, null, ssf);
            UnicastServerRef uref = new UnicastServerRef(lref);
            ref = uref;
            uref.exportObject(this, null);
        }

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    /**
     * Construct a new live reference for a server object in the local
     * address space.
     */
    public LiveRef(int port) {
        this((new ObjID()), port);
    }

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     */
    public LiveRef(int port,
                   RMIClientSocketFactory csf,
                   RMIServerSocketFactory ssf)
    {
        this((new ObjID()), port, csf, ssf);
    }

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    public static LiveRef read(ObjectInput in, boolean useNewFormat)
        throws IOException, ClassNotFoundException
    {
        Endpoint ep;
        ObjID id;


        // Now read in the endpoint, id, and result flag
        // (need to choose whether or not to read old JDK1.1 endpoint format)
        if (useNewFormat) {
            ep = TCPEndpoint.read(in);

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     **/
    ObjectEndpoint(ObjID id, Transport transport) {
        if (id == null) {
            throw new NullPointerException();
        }
        assert transport != null || id.equals(new ObjID(ObjID.DGC_ID));


        this.id = id;
        this.transport = transport;
    }

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     */
    public boolean serviceCall(final RemoteCall call) {
        try {
            /* read object id */
            final Remote impl;
            ObjID id;


            try {
                id = ObjID.read(call.getInputStream());
            } catch (java.io.IOException e) {
                throw new MarshalException("unable to read objID", e);
            }


            /* get the remote object */
            Transport transport = id.equals(dgcID) ? null : this;
            Target target =
                ObjectTable.getTarget(new ObjectEndpoint(id, transport));


            if (target == null || (impl = target.getImpl()) == null) {
                throw new NoSuchObjectException("no such object in table");

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        Registry testImpl = LocateRegistry.createRegistry(PORT);
        System.err.println("created test registry on port " + PORT);


        RemoteRef ref = new UnicastRef(
            new LiveRef(new ObjID(ObjID.REGISTRY_ID),
                        new TCPEndpoint("", PORT), false));
        Registry referenceStub = new ReferenceRegistryStub(ref);
        System.err.println("created reference registry stub: " +
                           referenceStub);

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        final long[] objnums = new long[COUNT];
        for (int i = 0; i < COUNT; i++) {
            final int j = i;
            class Escape extends RuntimeException { }
            try {
                new ObjID().write(new ObjectOutputStream(new OutputStream() {
                    public void write(int b) { }
                }) {
                    public void writeLong(long val) throws IOException {
                        objnums[j] = val;
                        throw new Escape();

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    /** Return if the stream is closed */
    protected boolean isClosed;


    public RemoteScrollableCursor(ScrollableCursor serverScrollableCursor) {
        this.id = new ObjID();
        this.isClosed = serverScrollableCursor.isClosed();
    }

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