How to use

isDigestNeeded

method

in

org.jgroups.protocols.pbcast.STATE_TRANSFER

public void openBarrier() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down OPEN_BARRIER", local_addr);
  down_prot.down(new Event(Event.OPEN_BARRIER));
}

protected void handleException(Throwable exception) {
  if(isDigestNeeded())
    openBarrierAndResumeStable();
  up_prot.up(new Event(Event.GET_STATE_OK, new StateTransferResult(exception)));
}

@ManagedOperation(description="Opens BARRIER and resumes STABLE")
public void openBarrierAndResumeStable() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down OPEN_BARRIER and RESUME_STABLE", local_addr);
  down_prot.down(new Event(Event.OPEN_BARRIER));
  down_prot.down(new Event(Event.RESUME_STABLE));
}

@ManagedOperation(description="Closes BARRIER and suspends STABLE")
public void closeBarrierAndSuspendStable() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down CLOSE_BARRIER and SUSPEND_STABLE", local_addr);
  down_prot.down(new Event(Event.CLOSE_BARRIER));
  down_prot.down(new Event(Event.SUSPEND_STABLE));
}

/** Set the digest and the send the state up to the application */
protected void handleStateRsp(final Digest digest, Address sender, byte[] state) {
  try {
    if(isDigestNeeded()) {
      punchHoleFor(sender);
      closeBarrierAndSuspendStable(); // fix for https://jira.jboss.org/jira/browse/JGRP-1013
      if(digest != null)
        down_prot.down(new Event(Event.OVERWRITE_DIGEST, digest)); // set the digest (e.g. in NAKACK)
    }
    waiting_for_state_response=false;
    stop=System.currentTimeMillis();
    log.debug("%s: received state, size=%s, time=%d milliseconds", local_addr,
         (state == null? "0" : Util.printBytes(state.length)), stop - start);
    StateTransferResult result=new StateTransferResult(state);
    up_prot.up(new Event(Event.GET_STATE_OK, result));
    down_prot.down(new Event(Event.GET_VIEW_FROM_COORD)); // https://issues.jboss.org/browse/JGRP-1751
  }
  catch(Throwable t) {
    handleException(t);
  }
  finally {
    if(isDigestNeeded()) {
      closeHoleFor(sender);
      openBarrierAndResumeStable();
    }
  }
}

if(isDigestNeeded()) {
  try {
    punchHoleFor(requester);
  if(isDigestNeeded()) {
    closeHoleFor(requester);
    resumeStable();

public void openBarrier() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down OPEN_BARRIER", local_addr);
  down_prot.down(new Event(Event.OPEN_BARRIER));
}

if(isDigestNeeded()){
  if(tmp_digest == null) {
    if(log.isWarnEnabled())

if(!isDigestNeeded()) { // state transfer is in progress, digest was already requested
  requestApplicationStates(sender, false);

protected void handleException(Throwable exception) {
  if(isDigestNeeded())
    openBarrierAndResumeStable();
  up_prot.up(new Event(Event.GET_STATE_OK, new StateTransferResult(exception)));
}

@ManagedOperation(description="Closes BARRIER and suspends STABLE")
public void closeBarrierAndSuspendStable() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down CLOSE_BARRIER and SUSPEND_STABLE", local_addr);
  down_prot.down(new Event(Event.CLOSE_BARRIER));
  down_prot.down(new Event(Event.SUSPEND_STABLE));
}

@ManagedOperation(description="Opens BARRIER and resumes STABLE")
public void openBarrierAndResumeStable() {
  if(!isDigestNeeded())
    return;
  log.trace("%s: sending down OPEN_BARRIER and RESUME_STABLE", local_addr);
  down_prot.down(new Event(Event.OPEN_BARRIER));
  down_prot.down(new Event(Event.RESUME_STABLE));
}

/** Set the digest and the send the state up to the application */
protected void handleStateRsp(final Digest digest, Address sender, byte[] state) {
  try {
    if(isDigestNeeded()) {
      punchHoleFor(sender);
      closeBarrierAndSuspendStable(); // fix for https://jira.jboss.org/jira/browse/JGRP-1013
      if(digest != null)
        down_prot.down(new Event(Event.OVERWRITE_DIGEST, digest)); // set the digest (e.g. in NAKACK)
    }
    waiting_for_state_response=false;
    stop=System.currentTimeMillis();
    log.debug("%s: received state, size=%s, time=%d milliseconds", local_addr,
         (state == null? "0" : Util.printBytes(state.length)), stop - start);
    StateTransferResult result=new StateTransferResult(state);
    up_prot.up(new Event(Event.GET_STATE_OK, result));
    down_prot.down(new Event(Event.GET_VIEW_FROM_COORD)); // https://issues.jboss.org/browse/JGRP-1751
  }
  catch(Throwable t) {
    handleException(t);
  }
  finally {
    if(isDigestNeeded()) {
      closeHoleFor(sender);
      openBarrierAndResumeStable();
    }
  }
}

if(isDigestNeeded()) {
  try {
    punchHoleFor(requester);
  if(isDigestNeeded()) {
    closeHoleFor(requester);
    resumeStable();