java.rmi.server.ObjID Java Examples

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

public StreamRemoteCall(Connection c, ObjID id, int op, long hash)
    throws RemoteException
{
    try {
        conn = c;
        Transport.transportLog.log(Log.VERBOSE,
            "write remote call header...");

        // write out remote call header info...
        // call header, part 1 (read by Transport)
        conn.getOutputStream().write(TransportConstants.Call);
        getOutputStream();           // creates a MarshalOutputStream
        id.write(out);               // object id (target of call)
        // call header, part 2 (read by Dispatcher)
        out.writeInt(op);            // method number (operation index)
        out.writeLong(hash);         // stub/skeleton hash
    } catch (IOException e) {
        throw new MarshalException("Error marshaling call header", e);
    }
}
 

/**
 * Construct a new Activator on a specified port.
 */
ActivatorImpl(int port, RMIServerSocketFactory ssf)
    throws RemoteException
{
    /* 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);
}
 

public Void run() {
    ClassLoader savedCcl =
        Thread.currentThread().getContextClassLoader();
    try {
        Thread.currentThread().setContextClassLoader(
            ClassLoader.getSystemClassLoader());

        /*
         * Put remote collector object in table by hand to prevent
         * listen on port.  (UnicastServerRef.exportObject would
         * cause transport to listen.)
         */
        try {
            dgc = new DGCImpl();
            ObjID dgcID = new ObjID(ObjID.DGC_ID);
            LiveRef ref = new LiveRef(dgcID, 0);
            UnicastServerRef disp = new UnicastServerRef(ref);
            Remote stub =
                Util.createProxy(DGCImpl.class,
                                 new UnicastRef(ref), true);
            disp.setSkeleton(dgc);
            Target target =
                new Target(dgc, disp, stub, dgcID, true);
            ObjectTable.putTarget(target);
        } catch (RemoteException e) {
            throw new Error(
                "exception initializing server-side DGC", e);
        }
    } finally {
        Thread.currentThread().setContextClassLoader(savedCcl);
    }
    return null;
}
 

/**
 * Construct a new live reference for a server object in the local
 * address space, to use sockets of the specified type.
 */
public LiveRef(int port,
               RMIClientSocketFactory csf,
               RMIServerSocketFactory ssf)
{
    this((new ObjID()), port, csf, ssf);
}
 

/**
 * Create an array of ObjIDs (needed for the DGC remote calls)
 * from the ids in the given set of refs.
 */
private static ObjID[] createObjIDArray(Set<RefEntry> refEntries) {
    ObjID[] ids = new ObjID[refEntries.size()];
    Iterator<RefEntry> iter = refEntries.iterator();
    for (int i = 0; i < ids.length; i++) {
        ids[i] = iter.next().getRef().getObjID();
    }
    return ids;
}
 

/**
 * Construct a Target for a remote object "impl" with
 * a specific object id.
 *
 * If "permanent" is true, then the impl is pinned permanently
 * (the impl will not be collected via distributed and/or local
 * GC).  If "on" is false, than the impl is subject to
 * collection. Permanent objects do not keep a server from
 * exiting.
 */
public Target(Remote impl, Dispatcher disp, Remote stub, ObjID id,
              boolean permanent)
{
    this.weakImpl = new WeakRef(impl, ObjectTable.reapQueue);
    this.disp = disp;
    this.stub = stub;
    this.id = id;
    this.acc = AccessController.getContext();

    /*
     * Fix for 4149366: so that downloaded parameter types unmarshalled
     * for this impl will be compatible with types known only to the
     * impl class's class loader (when it's not identical to the
     * exporting thread's context class loader), mark the impl's class
     * loader as the loader to use as the context class loader in the
     * server's dispatch thread while a call to this impl is being
     * processed (unless this exporting thread's context class loader is
     * a child of the impl's class loader, such as when a registry is
     * exported by an application, in which case this thread's context
     * class loader is preferred).
     */
    ClassLoader threadContextLoader =
        Thread.currentThread().getContextClassLoader();
    ClassLoader serverLoader = impl.getClass().getClassLoader();
    if (checkLoaderAncestry(threadContextLoader, serverLoader)) {
        this.ccl = threadContextLoader;
    } else {
        this.ccl = serverLoader;
    }

    this.permanent = permanent;
    if (permanent) {
        pinImpl();
    }
}
 

/**
 * The clean call removes the VMID from the set of clients
 * that hold references to the object associated with the LiveRef
 * ref.  The sequence number is used to detect late clean calls.  If the
 * argument "strong" is true, then the clean call is a result of a
 * failed "dirty" call, thus the sequence number for the VMID needs
 * to be remembered until the client goes away.
 */
public void clean(ObjID[] ids, long sequenceNum, VMID vmid, boolean strong)
{
    for (ObjID id : ids) {
        if (dgcLog.isLoggable(Log.VERBOSE)) {
            dgcLog.log(Log.VERBOSE, "id = " + id +
                ", vmid = " + vmid + ", strong = " + strong);
        }

        ObjectTable.unreferenced(id, sequenceNum, vmid, strong);
    }
}
 

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}
 

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}
 

/**
 * Construct a Target for a remote object "impl" with
 * a specific object id.
 *
 * If "permanent" is true, then the impl is pinned permanently
 * (the impl will not be collected via distributed and/or local
 * GC).  If "on" is false, than the impl is subject to
 * collection. Permanent objects do not keep a server from
 * exiting.
 */
public Target(Remote impl, Dispatcher disp, Remote stub, ObjID id,
              boolean permanent)
{
    this.weakImpl = new WeakRef(impl, ObjectTable.reapQueue);
    this.disp = disp;
    this.stub = stub;
    this.id = id;
    this.acc = AccessController.getContext();

    /*
     * Fix for 4149366: so that downloaded parameter types unmarshalled
     * for this impl will be compatible with types known only to the
     * impl class's class loader (when it's not identical to the
     * exporting thread's context class loader), mark the impl's class
     * loader as the loader to use as the context class loader in the
     * server's dispatch thread while a call to this impl is being
     * processed (unless this exporting thread's context class loader is
     * a child of the impl's class loader, such as when a registry is
     * exported by an application, in which case this thread's context
     * class loader is preferred).
     */
    ClassLoader threadContextLoader =
        Thread.currentThread().getContextClassLoader();
    ClassLoader serverLoader = impl.getClass().getClassLoader();
    if (checkLoaderAncestry(threadContextLoader, serverLoader)) {
        this.ccl = threadContextLoader;
    } else {
        this.ccl = serverLoader;
    }

    this.permanent = permanent;
    if (permanent) {
        pinImpl();
    }
}
 

ActivationSystemImpl(int port, RMIServerSocketFactory ssf)
    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);
}
 

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);
    } else {
        ep = TCPEndpoint.readHostPortFormat(in);
    }
    id = ObjID.read(in);
    boolean isResultStream = in.readBoolean();

    LiveRef ref = new LiveRef(id, ep, false);

    if (in instanceof ConnectionInputStream) {
        ConnectionInputStream stream = (ConnectionInputStream)in;
        // save ref to send "dirty" call after all args/returns
        // have been unmarshaled.
        stream.saveRef(ref);
        if (isResultStream) {
            // set flag in stream indicating that remote objects were
            // unmarshaled.  A DGC ack should be sent by the transport.
            stream.setAckNeeded();
        }
    } else {
        DGCClient.registerRefs(ep, Arrays.asList(new LiveRef[] { ref }));
    }

    return ref;
}
 

/**
 * The clean call removes the VMID from the set of clients
 * that hold references to the object associated with the LiveRef
 * ref.  The sequence number is used to detect late clean calls.  If the
 * argument "strong" is true, then the clean call is a result of a
 * failed "dirty" call, thus the sequence number for the VMID needs
 * to be remembered until the client goes away.
 */
public void clean(ObjID[] ids, long sequenceNum, VMID vmid, boolean strong)
{
    for (ObjID id : ids) {
        if (dgcLog.isLoggable(Log.VERBOSE)) {
            dgcLog.log(Log.VERBOSE, "id = " + id +
                ", vmid = " + vmid + ", strong = " + strong);
        }

        ObjectTable.unreferenced(id, sequenceNum, vmid, strong);
    }
}
 

/**
 * Construct a new Activator on a specified port.
 */
ActivatorImpl(int port, RMIServerSocketFactory ssf)
    throws RemoteException
{
    /* 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);
}
 

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}
 

/**
 * The clean call removes the VMID from the set of clients
 * that hold references to the object associated with the LiveRef
 * ref.  The sequence number is used to detect late clean calls.  If the
 * argument "strong" is true, then the clean call is a result of a
 * failed "dirty" call, thus the sequence number for the VMID needs
 * to be remembered until the client goes away.
 */
public void clean(ObjID[] ids, long sequenceNum, VMID vmid, boolean strong)
{
    for (ObjID id : ids) {
        if (dgcLog.isLoggable(Log.VERBOSE)) {
            dgcLog.log(Log.VERBOSE, "id = " + id +
                ", vmid = " + vmid + ", strong = " + strong);
        }

        ObjectTable.unreferenced(id, sequenceNum, vmid, strong);
    }
}
 

/**
 * Construct a new live reference for a server object in the local
 * address space, to use sockets of the specified type.
 */
public LiveRef(int port,
               RMIClientSocketFactory csf,
               RMIServerSocketFactory ssf)
{
    this((new ObjID()), port, csf, ssf);
}
 

/**
 * ObjectInputFilter to filter DGC input objects.
 * The list of acceptable classes is very short and explicit.
 * The depth and array sizes are limited.
 *
 * @param filterInfo access to class, arrayLength, etc.
 * @return  {@link ObjectInputFilter.Status#ALLOWED} if allowed,
 *          {@link ObjectInputFilter.Status#REJECTED} if rejected,
 *          otherwise {@link ObjectInputFilter.Status#UNDECIDED}
 */
private static ObjectInputFilter.Status checkInput(ObjectInputFilter.FilterInfo filterInfo) {
    if (dgcFilter != null) {
        ObjectInputFilter.Status status = dgcFilter.checkInput(filterInfo);
        if (status != ObjectInputFilter.Status.UNDECIDED) {
            // The DGC filter can override the built-in white-list
            return status;
        }
    }

    if (filterInfo.depth() > DGC_MAX_DEPTH) {
        return ObjectInputFilter.Status.REJECTED;
    }
    Class<?> clazz = filterInfo.serialClass();
    if (clazz != null) {
        while (clazz.isArray()) {
            if (filterInfo.arrayLength() >= 0 && filterInfo.arrayLength() > DGC_MAX_ARRAY_SIZE) {
                return ObjectInputFilter.Status.REJECTED;
            }
            // Arrays are allowed depending on the component type
            clazz = clazz.getComponentType();
        }
        if (clazz.isPrimitive()) {
            // Arrays of primitives are allowed
            return ObjectInputFilter.Status.ALLOWED;
        }
        return (clazz == ObjID.class ||
                clazz == UID.class ||
                clazz == VMID.class ||
                clazz == Lease.class)
                ? ObjectInputFilter.Status.ALLOWED
                : ObjectInputFilter.Status.REJECTED;
    }
    // Not a class, not size limited
    return ObjectInputFilter.Status.UNDECIDED;
}
 

/**
 * Construct a Target for a remote object "impl" with
 * a specific object id.
 *
 * If "permanent" is true, then the impl is pinned permanently
 * (the impl will not be collected via distributed and/or local
 * GC).  If "on" is false, than the impl is subject to
 * collection. Permanent objects do not keep a server from
 * exiting.
 */
public Target(Remote impl, Dispatcher disp, Remote stub, ObjID id,
              boolean permanent)
{
    this.weakImpl = new WeakRef(impl, ObjectTable.reapQueue);
    this.disp = disp;
    this.stub = stub;
    this.id = id;
    this.acc = AccessController.getContext();

    /*
     * Fix for 4149366: so that downloaded parameter types unmarshalled
     * for this impl will be compatible with types known only to the
     * impl class's class loader (when it's not identical to the
     * exporting thread's context class loader), mark the impl's class
     * loader as the loader to use as the context class loader in the
     * server's dispatch thread while a call to this impl is being
     * processed (unless this exporting thread's context class loader is
     * a child of the impl's class loader, such as when a registry is
     * exported by an application, in which case this thread's context
     * class loader is preferred).
     */
    ClassLoader threadContextLoader =
        Thread.currentThread().getContextClassLoader();
    ClassLoader serverLoader = impl.getClass().getClassLoader();
    if (checkLoaderAncestry(threadContextLoader, serverLoader)) {
        this.ccl = threadContextLoader;
    } else {
        this.ccl = serverLoader;
    }

    this.permanent = permanent;
    if (permanent) {
        pinImpl();
    }
}
 

/**
 * Process client VM signalling reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void referenced(ObjID id, long sequenceNum, VMID vmid) {
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null) {
            target.referenced(sequenceNum, vmid);
        }
    }
}
 

/**
 * Process client VM signalling reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void referenced(ObjID id, long sequenceNum, VMID vmid) {
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null) {
            target.referenced(sequenceNum, vmid);
        }
    }
}
 

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}
 

/**
 * Process client VM dropping reference for given ObjID: forward to
 * corresponding Target entry.  If ObjID is not found in table,
 * no action is taken.
 */
static void unreferenced(ObjID id, long sequenceNum, VMID vmid,
                         boolean strong)
{
    synchronized (tableLock) {
        ObjectEndpoint oe =
            new ObjectEndpoint(id, Transport.currentTransport());
        Target target = objTable.get(oe);
        if (target != null)
            target.unreferenced(sequenceNum, vmid, strong);
    }
}
 

/**
 * Construct a new Activator on a specified port.
 */
ActivatorImpl(int port, RMIServerSocketFactory ssf)
    throws RemoteException
{
    /* 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);
}