protected void handleViewChange(View v) {
Address old_coord;
List<Address> new_members = v.getMembers();
boolean send_up_exception = false;
this.view = v;
synchronized (members) {
old_coord = (!members.isEmpty() ? members.get(0) : null);
members.clear();
members.addAll(new_members);
// this handles the case where a coord dies during a state transfer; prevents clients from
// hanging forever
// Note this only takes a coordinator crash into account, a getState(target, timeout), where
// target is not
// null is not handled ! (Usually we get the state from the coordinator)
// http://jira.jboss.com/jira/browse/JGRP-148
if (waiting_for_state_response && old_coord != null && !members.contains(old_coord))
send_up_exception = true;
}
if (send_up_exception) {
log.warn("%s: discovered that the state provider (%s) left", local_addr, old_coord);
waiting_for_state_response = false;
Exception ex = new EOFException("state provider " + old_coord + " left");
up_prot.up(new Event(Event.GET_STATE_OK, new StateTransferResult(ex)));
openBarrierAndResumeStable();
}
// remove non members from list of members requesting state
state_requesters.retainAll(new_members);
}
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
StateHeader hdr = (StateHeader) msg.getHeader(this.id);
if (hdr == null) break;
switch (hdr.type) {
case StateHeader.STATE_REQ:
state_requesters.add(msg.getSrc());
break;
case StateHeader.STATE_RSP:
handleStateRsp(hdr.getDigest(), msg.getSrc(), msg.getBuffer());
break;
case StateHeader.STATE_EX:
closeHoleFor(msg.getSrc());
handleException((Throwable) msg.getObject());
break;
default:
log.error("%s: type %s not known in StateHeader", local_addr, hdr.type);
break;
}
return null;
case Event.TMP_VIEW:
case Event.VIEW_CHANGE:
handleViewChange((View) evt.getArg());
break;
case Event.CONFIG:
Map<String, Object> config = (Map<String, Object>) evt.getArg();
if (config != null && config.containsKey("state_transfer"))
log.error(
Util.getMessage(
"ProtocolStackCannotContainTwoStateTransferProtocolsRemoveEitherOneOfThem"));
break;
}
return up_prot.up(evt);
}