How to use

CoordGmsImpl

in

org.jgroups.protocols.pbcast

public void becomeCoordinator() {
  CoordGmsImpl tmp=(CoordGmsImpl)impls.get(COORD);
  if(tmp == null) {
    tmp=new CoordGmsImpl(this);
    impls.put(COORD, tmp);
  }
  try {
    first_view_sent=false;
    tmp.init();
  }
  catch(Exception e) {
    log.error(Util.getMessage("ExceptionSwitchingToCoordinatorRole"), e);
  }
  setImpl(tmp);
}

public void suspect(Address mbr) {
  if(mbr.equals(gms.local_addr)) {
    if(log.isWarnEnabled()) log.warn("I am the coord and I'm suspected -- will probably leave shortly");
    return;
  }        
  Collection<Request> suspected=new LinkedHashSet<>(1);
  suspected.add(new Request(Request.SUSPECT,mbr));
  handleMembershipChange(suspected);
}

public void join(Address mbr,boolean useFlushIfPresent) {
  wrongMethod("join");
}

    log.warn(mbr + " already present; returning existing view " + gms.view);
  JoinRsp join_rsp=new JoinRsp(new View(gms.view_id, gms.members.getMembers()), gms.getDigest());
  sendJoinResponse(join_rsp, mbr);
  it.remove();
sendLeaveResponses(leaving_mbrs); // no-op if no leaving members
     log.warn("GMS flush by coordinator at " + gms.getLocalAddress() + " failed");
  sendJoinResponses(join_rsp, new_mbrs); // might be a no-op if no joining members
  gms.castViewChangeWithDest(new_view, null, tmp_mbrs);
  sendJoinResponses(join_rsp, new_mbrs); // Return result to newly joined clients (if there are any)

  sendLeaveResponses(leaving_mbrs); // we still have to send potential leave responses
sendLeaveResponses(leaving_mbrs); // no-op if no leaving members

@ManagedOperation(description="Fetches digests from all members and installs them, unblocking blocked members")
public void fixDigests() {
  if(impl instanceof CoordGmsImpl)
    ((CoordGmsImpl)impl).fixDigests();
}

public MergeId _getMergeId() {
  return impl instanceof CoordGmsImpl? ((CoordGmsImpl)impl).getMergeId() : null;
}

/** The coordinator itself wants to leave the group */
public void leave(Address mbr) {
  if(mbr == null) {
    if(log.isErrorEnabled()) log.error(Util.getMessage("MemberSAddressIsNull"));
    return;
  }
  leaving=true;
  Address next_coord=gms.determineNextCoordinator();
  if(next_coord != null)
    sendLeaveReqTo(next_coord);
  else {
    gms.getViewHandler().add(new Request(Request.LEAVE, mbr));
    // If we're the coord leaving, ignore gms.leave_timeout: https://issues.jboss.org/browse/JGRP-1509
    long timeout=(long)(Math.max(gms.leave_timeout, gms.view_ack_collection_timeout) * 1.10);
    gms.getViewHandler().waitUntilComplete(timeout);
  }
  gms.becomeClient();
}

public void handleExit() {
  cancelMerge();
}

  sendLeaveResponses(leaving_mbrs); // we still have to send potential leave responses
sendLeaveResponses(leaving_mbrs); // no-op if no leaving members

@ManagedOperation(description="Fetches digests from all members and installs them, unblocking blocked members")
public void fixDigests() {
  if(impl instanceof CoordGmsImpl)
    ((CoordGmsImpl)impl).fixDigests();
}

public MergeId _getMergeId() {
  return impl instanceof CoordGmsImpl? ((CoordGmsImpl)impl).getMergeId() : null;
}

/** The coordinator itself wants to leave the group */
public void leave(Address mbr) {
  if(mbr == null) {
    if(log.isErrorEnabled()) log.error(Util.getMessage("MemberSAddressIsNull"));
    return;
  }
  leaving=true;
  Address next_coord=gms.determineNextCoordinator();
  if(next_coord != null)
    sendLeaveReqTo(next_coord);
  else {
    gms.getViewHandler().add(new Request(Request.LEAVE, mbr));
    // If we're the coord leaving, ignore gms.leave_timeout: https://issues.jboss.org/browse/JGRP-1509
    long timeout=(long)(Math.max(gms.leave_timeout, gms.view_ack_collection_timeout) * 1.10);
    gms.getViewHandler().waitUntilComplete(timeout);
  }
  gms.becomeClient();
}

public void init() throws Exception {
  super.init();
  cancelMerge();
}

public void becomeCoordinator() {
  CoordGmsImpl tmp=(CoordGmsImpl)impls.get(COORD);
  if(tmp == null) {
    tmp=new CoordGmsImpl(this);
    impls.put(COORD, tmp);
  }
  try {
    tmp.init();
  }
  catch(Exception e) {
    log.error("exception switching to coordinator role", e);
  }
  setImpl(tmp);
}

public void joinWithStateTransfer(Address mbr,boolean useFlushIfPresent) {
  wrongMethod("join");
}

public void suspect(Address mbr) {
  if(mbr.equals(gms.local_addr)) {
    if(log.isWarnEnabled()) log.warn("I am the coord and I'm being am suspected -- will probably leave shortly");
    return;
  }
  Collection emptyVector=new LinkedHashSet(0);
  Collection suspected=new LinkedHashSet(1);
  suspected.add(mbr);
  handleMembershipChange(emptyVector, emptyVector, suspected);
}

public void becomeCoordinator() {
  CoordGmsImpl tmp=(CoordGmsImpl)impls.get(COORD);
  if(tmp == null) {
    tmp=new CoordGmsImpl(this);
    impls.put(COORD, tmp);
  }
  try {
    first_view_sent=false;
    tmp.init();
  }
  catch(Exception e) {
    log.error(Util.getMessage("ExceptionSwitchingToCoordinatorRole"), e);
  }
  setImpl(tmp);
}

public void joinWithStateTransfer(Address mbr,boolean useFlushIfPresent) {
  wrongMethod("join");
}

public void suspect(Address mbr) {
  if(mbr.equals(gms.local_addr)) {
    if(log.isWarnEnabled()) log.warn("I am the coord and I'm suspected -- will probably leave shortly");
    return;
  }        
  Collection<Request> suspected=new LinkedHashSet<>(1);
  suspected.add(new Request(Request.SUSPECT,mbr));
  handleMembershipChange(suspected);
}