public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
ForkHeader hdr = (ForkHeader) msg.getHeader(id);
if (hdr == null) break;
if (hdr.fork_stack_id == null)
throw new IllegalArgumentException("header has a null fork_stack_id");
Protocol bottom_prot = get(hdr.fork_stack_id);
return bottom_prot != null
? bottom_prot.up(evt)
: this.unknownForkHandler.handleUnknownForkStack(msg, hdr.fork_stack_id);
case Event.VIEW_CHANGE:
for (Protocol bottom : fork_stacks.values()) bottom.up(evt);
break;
case Event.STATE_TRANSFER_OUTPUTSTREAM:
if (!process_state_events) break;
getStateFromMainAndForkChannels(evt);
return null;
case Event.STATE_TRANSFER_INPUTSTREAM:
if (!process_state_events) break;
setStateInMainAndForkChannels((InputStream) evt.getArg());
return null;
}
return up_prot.up(evt);
}
public Object down(Event evt) {
switch (evt.getType()) {
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address) evt.getArg();
break;
}
return down_prot.down(evt);
}
protected void getStateFromMainAndForkChannels(Event evt) {
final OutputStream out = (OutputStream) evt.getArg();
try (DataOutputStream dos = new DataOutputStream(out)) {
getStateFrom(null, up_prot, null, null, dos);
// now fetch state from all fork channels
for (Map.Entry<String, Protocol> entry : fork_stacks.entrySet()) {
String stack_name = entry.getKey();
Protocol prot = entry.getValue();
ForkProtocolStack fork_stack = getForkStack(prot);
for (Map.Entry<String, JChannel> en : fork_stack.getForkChannels().entrySet()) {
String fc_name = en.getKey();
JChannel fc = en.getValue();
getStateFrom(fc, null, stack_name, fc_name, dos);
}
}
} catch (Throwable ex) {
log.error("%s: failed fetching state from main channel", local_addr, ex);
}
}
@SuppressWarnings("unchecked")
public Object down(Event evt) {
int type = evt.getType();
switch (type) {
case Event.CONNECT:
case Event.CONNECT_USE_FLUSH:
case Event.CONNECT_WITH_STATE_TRANSFER:
case Event.CONNECT_WITH_STATE_TRANSFER_USE_FLUSH:
boolean use_flush =
type == Event.CONNECT_USE_FLUSH || type == Event.CONNECT_WITH_STATE_TRANSFER_USE_FLUSH;
boolean state_transfer =
type == Event.CONNECT_WITH_STATE_TRANSFER
|| type == Event.CONNECT_WITH_STATE_TRANSFER_USE_FLUSH;
if (print_local_addr) {
PhysicalAddress physical_addr =
print_physical_addrs
? (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr))
: null;
System.out.println(
"\n-------------------------------------------------------------------\n"
+ "GMS: address="
+ local_addr
+ ", cluster="
+ evt.getArg()
+ (physical_addr != null ? ", physical address=" + physical_addr : "")
+ "\n-------------------------------------------------------------------");
} else {
if (log.isDebugEnabled()) {
PhysicalAddress physical_addr =
print_physical_addrs
? (PhysicalAddress) down(new Event(Event.GET_PHYSICAL_ADDRESS, local_addr))
: null;
log.debug(
"address="
+ local_addr
+ ", cluster="
+ evt.getArg()
+ (physical_addr != null ? ", physical address=" + physical_addr : ""));
}
}
down_prot.down(evt);
if (local_addr == null) throw new IllegalStateException("local_addr is null");
try {
if (state_transfer) impl.joinWithStateTransfer(local_addr, use_flush);
else impl.join(local_addr, use_flush);
} catch (Throwable e) {
return e;
}
return null; // don't pass down: event has already been passed down
case Event.DISCONNECT:
impl.leave((Address) evt.getArg());
if (!(impl instanceof CoordGmsImpl)) {
initState(); // in case connect() is called again
}
down_prot.down(evt); // notify the other protocols, but ignore the result
return null;
case Event.CONFIG:
Map<String, Object> config = (Map<String, Object>) evt.getArg();
if ((config != null && config.containsKey("flush_supported"))) {
flushProtocolInStack = true;
}
break;
case Event.SET_LOCAL_ADDRESS:
local_addr = (Address) evt.getArg();
break;
}
return down_prot.down(evt);
}
@SuppressWarnings("unchecked")
public Object up(Event evt) {
switch (evt.getType()) {
case Event.MSG:
Message msg = (Message) evt.getArg();
GmsHeader hdr = (GmsHeader) msg.getHeader(this.id);
if (hdr == null) break;
switch (hdr.type) {
case GmsHeader.JOIN_REQ:
view_handler.add(
new Request(Request.JOIN, hdr.mbr, false, null, hdr.useFlushIfPresent));
break;
case GmsHeader.JOIN_REQ_WITH_STATE_TRANSFER:
view_handler.add(
new Request(
Request.JOIN_WITH_STATE_TRANSFER, hdr.mbr, false, null, hdr.useFlushIfPresent));
break;
case GmsHeader.JOIN_RSP:
impl.handleJoinResponse(hdr.join_rsp);
break;
case GmsHeader.LEAVE_REQ:
if (hdr.mbr == null) return null;
view_handler.add(new Request(Request.LEAVE, hdr.mbr, false));
break;
case GmsHeader.LEAVE_RSP:
impl.handleLeaveResponse();
break;
case GmsHeader.VIEW:
View new_view = hdr.view;
if (new_view == null) return null;
Address coord = msg.getSrc();
if (!new_view.containsMember(coord)) {
sendViewAck(
coord); // we need to send the ack first, otherwise the connection is removed
impl.handleViewChange(new_view, hdr.my_digest);
} else {
impl.handleViewChange(new_view, hdr.my_digest);
sendViewAck(coord); // send VIEW_ACK to sender of view
}
break;
case GmsHeader.VIEW_ACK:
Address sender = msg.getSrc();
ack_collector.ack(sender);
return null; // don't pass further up
case GmsHeader.MERGE_REQ:
impl.handleMergeRequest(msg.getSrc(), hdr.merge_id, hdr.mbrs);
break;
case GmsHeader.MERGE_RSP:
MergeData merge_data =
new MergeData(msg.getSrc(), hdr.view, hdr.my_digest, hdr.merge_rejected);
if (log.isTraceEnabled()) {
log.trace(
local_addr
+ ": got merge response from "
+ msg.getSrc()
+ ", merge_id="
+ hdr.merge_id
+ ", merge data is "
+ merge_data);
}
impl.handleMergeResponse(merge_data, hdr.merge_id);
break;
case GmsHeader.INSTALL_MERGE_VIEW:
impl.handleMergeView(
new MergeData(msg.getSrc(), hdr.view, hdr.my_digest), hdr.merge_id);
break;
case GmsHeader.INSTALL_DIGEST:
Digest tmp = hdr.my_digest;
down_prot.down(new Event(Event.MERGE_DIGEST, tmp));
break;
case GmsHeader.INSTALL_MERGE_VIEW_OK:
// [JGRP-700] - FLUSH: flushing should span merge
merge_ack_collector.ack(msg.getSrc());
break;
case GmsHeader.CANCEL_MERGE:
// [JGRP-524] - FLUSH and merge: flush doesn't wrap entire merge process
impl.handleMergeCancelled(hdr.merge_id);
break;
case GmsHeader.GET_DIGEST_REQ:
// only handle this request if it was sent by the coordinator (or at least a member) of
// the current cluster
synchronized (members) {
if (!members.contains(msg.getSrc())) break;
}
// discard my own request:
if (msg.getSrc().equals(local_addr)) return null;
if (hdr.merge_id != null
&& !(merger.matchMergeId(hdr.merge_id) || merger.setMergeId(null, hdr.merge_id)))
return null;
// fetch only my own digest
Digest digest = (Digest) down_prot.down(new Event(Event.GET_DIGEST, local_addr));
if (digest != null) {
GmsHeader rsp_hdr = new GmsHeader(GmsHeader.GET_DIGEST_RSP);
rsp_hdr.my_digest = digest;
Message get_digest_rsp = new Message(msg.getSrc(), null, null);
get_digest_rsp.setFlag(Message.OOB);
get_digest_rsp.putHeader(this.id, rsp_hdr);
down_prot.down(new Event(Event.MSG, get_digest_rsp));
}
break;
case GmsHeader.GET_DIGEST_RSP:
Digest digest_rsp = hdr.my_digest;
impl.handleDigestResponse(msg.getSrc(), digest_rsp);
break;
default:
if (log.isErrorEnabled()) log.error("GmsHeader with type=" + hdr.type + " not known");
}
return null; // don't pass up
case Event.SUSPECT:
Object retval = up_prot.up(evt);
Address suspected = (Address) evt.getArg();
view_handler.add(new Request(Request.SUSPECT, suspected, true));
ack_collector.suspect(suspected);
merge_ack_collector.suspect(suspected);
return retval;
case Event.UNSUSPECT:
impl.unsuspect((Address) evt.getArg());
return null; // discard
case Event.MERGE:
view_handler.add(
new Request(Request.MERGE, null, false, (Map<Address, View>) evt.getArg()));
return null; // don't pass up
case Event.IS_MERGE_IN_PROGRESS:
return merger.isMergeInProgress();
}
return up_prot.up(evt);
}
