Examples of net.jini.jeri.OutboundRequestIterator

net.jini.jeri.OutboundRequestIterator
Produces {@link OutboundRequest} instances to use for attempting tosend a particular request to a remote communication endpoint.
As long as {@link #hasNext hasNext} returns true,the {@link #next next} method can be invoked to initiate an attemptto make the request. If successful, the next method returns an OutboundRequest to use to write the request data and read the response.
If the request communication attempt fails, such as if the next invocation throws an exception or if a subsequent I/O operation on the returned OutboundRequest or its streams throws an exception, then if hasNext returns true again, the next method can be invoked again to retry the request attempt. This process of retrying failed request attempts can repeat as long as hasNext returns true after the previous failed request attempt.
Note that it is the user's responsibility to abstain from retrying a request attempt if doing so might violate any applicable guarantees of at most once execution semantics (invoking {@link OutboundRequest#getDeliveryStatus getDeliveryStatus} on theprevious OutboundRequest might aid in making that determination).
A typical OutboundRequestIterator is likely to support making only one request attempt, in which case after one invocation of next (successful or not), hasNext will return false. Reasons that an OutboundRequestIterator might support multiple request attempts include:
- if the remote endpoint implementation features multiple communication mechanism alternatives to attempt or
- if the implementation can ascertain that the nature of the previous request attempt failure indicates that it would be very unlikely to reoccur in a subsequent attempt.
The hasNext method should not return true after successive failed request attempts indefinitely. The request retry mechanism provided by OutboundRequestIterator is not intended for implementing a strategy of general retry of the same communication mechanism after indeterminate failures.
Note that it is permitted, although unlikely, for an OutboundRequestIterator's hasNext method to never return true, in which case the OutboundRequestIterator does not support initiating even one attempt to send the request.
An OutboundRequestIterator is not guaranteed to be safe for concurrent use by multiple threads. @author Sun Microsystems, Inc. @see Endpoint @since 2.0

      Constraints.Distilled distilled =
    Constraints.distill(constraints, false);
      return connectionManager.newRequest(new Handle(distilled));


  } catch (final UnsupportedConstraintException e) {
      return new OutboundRequestIterator() {
    private boolean nextCalled = false;
    public boolean hasNext() { return !nextCalled; }
    public OutboundRequest next() throws IOException {
        if (!hasNext()) { throw new NoSuchElementException(); }
        nextCalled = true;

View Full Code Here

  newRequest(final InvocationConstraints constraints)
    {
  if (constraints == null) {
      throw new NullPointerException();
  }
  return new OutboundRequestIterator() {
      private boolean nextCalled = false;
      private OutboundRequest currentRequest;
      public OutboundRequest next() throws IOException {
    if (!hasNext()) {
        throw new NoSuchElementException();

View Full Code Here


  /**
   * Implements Endpoint.newRequest when the constraints are supported.
   */
  OutboundRequestIterator newRequest(final CallContext callContext) {
      return new OutboundRequestIterator() {
    private boolean done;
    public synchronized boolean hasNext() {
        return !done;
    }
    public synchronized OutboundRequest next() throws IOException {

View Full Code Here


      /* test endpoint.newRequest(...) */
      final PrivilegedExceptionAction pact =
    new PrivilegedExceptionAction() {
      public Object run() throws IOException {
          OutboundRequestIterator riter = 
        clientEndpoint.newRequest(clientConstraints);
          if (!riter.hasNext()) {
        return "no request in the requestIter: " +
            riter;
          }


          OutboundRequest req = riter.next();
          if (riter.hasNext()) {
        return "more than one request in " +
            "requestIter: " + riter;
          }


          return req;

View Full Code Here

  newRequest(final InvocationConstraints constraints)
    {
  if (constraints == null) {
      throw new NullPointerException();
  }
  return new OutboundRequestIterator() {
      private boolean nextCalled = false;
      private OutboundRequest currentRequest;
      public OutboundRequest next() throws IOException {
    if (!hasNext()) {
        throw new NoSuchElementException();

View Full Code Here

      getEndpoint(new PrearrangedSocketFactory(socket), constraints);
  ConnManagerFactoryImpl factory = new ConnManagerFactoryImpl();
  endpointInternals.setConnManagerFactory(ep, factory);
  endpointInternals.disableSocketConnect(ep);


  OutboundRequestIterator iter = ep.newRequest(constraints);
  ConnectionInfo ci = factory.getConnectionInfo();
  if (ci != null) {
      return ci;
  }


  /*
   * Connection manager was never consulted, so constraints must not be
   * supported.  The resulting endpoint-fabricated outbound request
   * iterator should throw UnsupportedConstraintException from its next
   * method.
   */
  if (iter.hasNext()) {
      try {
    iter.next();
      } catch (UnsupportedConstraintException e) {
    throw e;
      } catch (IOException e) {
      }
  }

View Full Code Here

        if (handle == null) {
      throw new NullPointerException();
        }
        connInfo = new ConnectionInfo(endpoint, handle);


        return new OutboundRequestIterator() {
      public boolean hasNext() {
          return false;
      }
      public OutboundRequest next() throws IOException {
          throw new NoSuchElementException();

View Full Code Here

  System.err.println("\nTesting " + method + ":");
  for (Iterator i = testCases.entrySet().iterator(); i.hasNext();) {
      Map.Entry entry = (Map.Entry) i.next();
      InvocationConstraints c = (InvocationConstraints) entry.getKey();
      System.err.println("  trying: " + c);
      OutboundRequestIterator iter = endpoint.newRequest(c);
      OutboundRequest request = iter.next();
      InvocationConstraints u = request.getUnfulfilledConstraints();
      System.err.println("returned: " + u);
      if (!entry.getValue().equals(u)) {
    throw new RuntimeException(
        "TEST FAILED: incorrect constraints returned by " +

View Full Code Here

      Constraints.Distilled distilled =
    Constraints.distill(constraints, false);
      return connectionManager.newRequest(new Handle(distilled));


  } catch (final UnsupportedConstraintException e) {
      return new OutboundRequestIterator() {
    private boolean nextCalled = false;
    public boolean hasNext() { return !nextCalled; }
    public OutboundRequest next() throws IOException {
        if (!hasNext()) { throw new NoSuchElementException(); }
        nextCalled = true;

View Full Code Here

        GetDeliveryDispatcher dispatcher = new GetDeliveryDispatcher();
        GetDeliveryContext lc = new GetDeliveryContext(dispatcher);
        Endpoint e =
            se.enumerateListenEndpoints(lc);
        dispatcher.accept();
        OutboundRequestIterator ori = 
            e.newRequest(InvocationConstraints.EMPTY);
        OutboundRequest or = null;
        while (ori.hasNext()) {
            or = ori.next();
            ObjectOutputStream oos = new ObjectOutputStream(
                or.getRequestOutputStream());
            oos.writeInt(1);
            oos.close();
        }
        if (dispatcher.dispatchCalled()!=1){
            throw new TestException("Dispatcher did not receive"
                + " the value sent");
        }
        if (!or.getDeliveryStatus()) {
            throw new TestException("Call on OutboundRequest"
                + ".getDeliveryStatus() returned false for an accepted"
                + " request");
        }
        ArrayList endpoints = lc.getEndpoints();
        Iterator it = endpoints.iterator();
        while (it.hasNext()){
            ((EndpointHolder)it.next()).getListenHandle().close();
        }
        dispatcher.reject();
        try {
            ori = e.newRequest(InvocationConstraints.EMPTY);
            while (ori.hasNext()) {
                or = ori.next();
                ObjectOutputStream oos = new ObjectOutputStream(
                    or.getRequestOutputStream());
                oos.writeInt(2);
                oos.close();
            }

View Full Code Here

0 1

TOP

Related Classes of net.jini.jeri.OutboundRequestIterator

com.sun.jini.discovery.internal.EndpointBasedClient

com.sun.jini.discovery.internal.EndpointBasedClient$ConnManagerFactoryImpl

com.sun.jini.test.spec.jeri.basicobjectendpoint.NewCall_ExceptionTest

com.sun.jini.test.spec.jeri.basicobjectendpoint.NewCall_NormalTest

com.sun.jini.test.spec.jeri.mux.ClientAbortTest

com.sun.jini.test.spec.jeri.mux.ClientFlowControlTest

com.sun.jini.test.spec.jeri.mux.CloseTest

com.sun.jini.test.spec.jeri.mux.MuxClientTest

com.sun.jini.test.spec.jeri.transport.GetDeliveryStatusTest

com.sun.jini.test.spec.jeri.transport.NewRequestConflictingConstraintsTest

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.