/** @param ctx message context for the unacked message */
    protected ResendCandidate(Message m) {
      message = m;
      retries = 0;
      RMConfiguration cfg = manager.getEffectiveConfiguration(message);
      long baseRetransmissionInterval = cfg.getBaseRetransmissionInterval().longValue();
      backoff = cfg.isExponentialBackoff() ? RetransmissionQueue.DEFAULT_EXPONENTIAL_BACKOFF : 1;
      next = new Date(System.currentTimeMillis() + baseRetransmissionInterval);
      nextInterval = baseRetransmissionInterval * backoff;
      RetryPolicyType rmrp =
          null != manager.getSourcePolicy() ? manager.getSourcePolicy().getRetryPolicy() : null;
      maxRetries = null != rmrp ? rmrp.getMaxRetries() : -1;

      AddressingProperties maps = RMContextUtils.retrieveMAPs(message, false, true);
      AttributedURIType to = null;
      if (null != maps) {
        to = maps.getTo();
      }
      if (to != null && RMUtils.getAddressingConstants().getAnonymousURI().equals(to.getValue())) {
        LOG.log(Level.INFO, "Cannot resend to anonymous target.  Not scheduling a resend.");
        return;
      }
      RMProperties rmprops = RMContextUtils.retrieveRMProperties(message, true);
      if (null != rmprops) {
        number = rmprops.getSequence().getMessageNumber();
      }
      if (null != manager.getTimer() && maxRetries != 0) {
        schedule();
      }
    }
  /**
   * Accepts a new resend candidate.
   *
   * @param ctx the message context.
   * @return ResendCandidate
   */
  protected ResendCandidate cacheUnacknowledged(Message message) {
    RMProperties rmps = RMContextUtils.retrieveRMProperties(message, true);
    SequenceType st = rmps.getSequence();
    Identifier sid = st.getIdentifier();
    String key = sid.getValue();

    ResendCandidate candidate = null;

    synchronized (this) {
      List<ResendCandidate> sequenceCandidates = getSequenceCandidates(key);
      if (null == sequenceCandidates) {
        sequenceCandidates = new ArrayList<ResendCandidate>();
        candidates.put(key, sequenceCandidates);
      }
      candidate = new ResendCandidate(message);
      if (isSequenceSuspended(key)) {
        candidate.suspend();
      }
      sequenceCandidates.add(candidate);
      unacknowledgedCount++;
    }
    LOG.fine("Cached unacknowledged message.");
    try {
      RMEndpoint rme = manager.getReliableEndpoint(message);
      rme.handleAccept(key, st.getMessageNumber(), message);
    } catch (RMException e) {
      LOG.log(Level.WARNING, "Could not find reliable endpoint for message");
    }
    return candidate;
  }
  private void doResend(SoapMessage message) {
    try {

      // initialize copied interceptor chain for message
      PhaseInterceptorChain retransmitChain = manager.getRetransmitChain(message);
      ProtocolVariation protocol = RMContextUtils.getProtocolVariation(message);
      Endpoint endpoint = manager.getReliableEndpoint(message).getEndpoint(protocol);
      PhaseChainCache cache = new PhaseChainCache();
      boolean after = true;
      if (retransmitChain == null) {

        // no saved retransmit chain, so construct one from scratch (won't work for WS-Security on
        // server, so
        //  need to fix)
        retransmitChain = buildRetransmitChain(endpoint, cache);
        after = false;
      }
      message.setInterceptorChain(retransmitChain);

      // clear flag for SOAP out interceptor so envelope will be written
      message.remove(SoapOutInterceptor.WROTE_ENVELOPE_START);

      // discard all saved content
      Set<Class<?>> formats = message.getContentFormats();
      List<CachedOutputStreamCallback> callbacks = null;
      for (Class<?> clas : formats) {
        Object content = message.getContent(clas);
        if (content != null) {
          LOG.info(
              "Removing "
                  + clas.getName()
                  + " content of actual type "
                  + content.getClass().getName());
          message.removeContent(clas);
          if (clas == OutputStream.class && content instanceof WriteOnCloseOutputStream) {
            callbacks = ((WriteOnCloseOutputStream) content).getCallbacks();
          }
        }
      }

      // read SOAP headers from saved input stream
      RewindableInputStream is =
          (RewindableInputStream) message.get(RMMessageConstants.SAVED_CONTENT);
      is.rewind();
      XMLStreamReader reader = StaxUtils.createXMLStreamReader(is, "UTF-8");
      message.getHeaders().clear();
      if (reader.getEventType() != XMLStreamConstants.START_ELEMENT
          && reader.nextTag() != XMLStreamConstants.START_ELEMENT) {
        throw new IllegalStateException("No document found");
      }
      readHeaders(reader, message);
      int event;
      while ((event = reader.nextTag()) != XMLStreamConstants.START_ELEMENT) {
        if (event == XMLStreamConstants.END_ELEMENT) {
          throw new IllegalStateException("No body content present");
        }
      }

      // set message addressing properties
      AddressingProperties maps = new MAPCodec().unmarshalMAPs(message);
      RMContextUtils.storeMAPs(maps, message, true, MessageUtils.isRequestor(message));
      AttributedURIType to = null;
      if (null != maps) {
        to = maps.getTo();
      }
      if (null == to) {
        LOG.log(Level.SEVERE, "NO_ADDRESS_FOR_RESEND_MSG");
        return;
      }
      if (RMUtils.getAddressingConstants().getAnonymousURI().equals(to.getValue())) {
        LOG.log(Level.FINE, "Cannot resend to anonymous target");
        return;
      }

      // initialize conduit for new message
      Conduit c = message.getExchange().getConduit(message);
      if (c == null) {
        c = buildConduit(message, endpoint, to);
      }
      c.prepare(message);

      // replace standard message marshaling with copy from saved stream
      ListIterator<Interceptor<? extends Message>> iterator = retransmitChain.getIterator();
      while (iterator.hasNext()) {
        Interceptor<? extends Message> incept = iterator.next();

        // remove JAX-WS interceptors which handle message modes and such
        if (incept.getClass().getName().startsWith("org.apache.cxf.jaxws.interceptors")) {
          retransmitChain.remove(incept);
        } else if (incept instanceof PhaseInterceptor
            && (((PhaseInterceptor<?>) incept).getPhase() == Phase.MARSHAL)) {

          // remove any interceptors from the marshal phase
          retransmitChain.remove(incept);
        }
      }
      retransmitChain.add(new CopyOutInterceptor(reader));

      // restore callbacks on output stream
      if (callbacks != null) {
        OutputStream os = message.getContent(OutputStream.class);
        if (os != null) {
          WriteOnCloseOutputStream woc;
          if (os instanceof WriteOnCloseOutputStream) {
            woc = (WriteOnCloseOutputStream) os;
          } else {
            woc = new WriteOnCloseOutputStream(os);
            message.setContent(OutputStream.class, woc);
          }
          for (CachedOutputStreamCallback cb : callbacks) {
            woc.registerCallback(cb);
          }
        }
      }

      // send the message
      message.put(RMMessageConstants.RM_RETRANSMISSION, Boolean.TRUE);
      if (after) {
        retransmitChain.doInterceptStartingAfter(message, RMCaptureOutInterceptor.class.getName());
      } else {
        retransmitChain.doIntercept(message);
      }
      if (LOG.isLoggable(Level.INFO)) {
        RMProperties rmps = RMContextUtils.retrieveRMProperties(message, true);
        SequenceType seq = rmps.getSequence();
        LOG.log(
            Level.INFO,
            "Retransmitted message "
                + seq.getMessageNumber()
                + " in sequence "
                + seq.getIdentifier().getValue());
        rmps = new RMProperties();
      }

    } catch (Exception ex) {
      LOG.log(Level.SEVERE, "RESEND_FAILED_MSG", ex);
    }
  }