/**
* Returns the fork stack for fork_stack_id (if exitstent), or creates a new fork-stack from
* protocols and adds it into the hashmap of fork-stack (key is fork_stack_id). Method init() will
* be called on each protocol, from bottom to top.
*
* @param fork_stack_id The key under which the new fork-stack should be added to the fork-stacks
* hashmap
* @param protocols A list of protocols from <em>bottom to top</em> to be inserted. They will be
* sandwiched between ForkProtocolStack (top) and ForkProtocol (bottom). The list can be empty
* (or null) in which case we won't create any protocols, but still have a separate fork-stack
* inserted.
* @param initialize If false, the ref count 'inits' will not get incremented and init() won't be
* called. This is needed when creating a fork stack from an XML config inside of the FORK
* protocol. The protocols in the fork stack will only get initialized on the first
* ForkChannel creation
* @return The new {@link ForkProtocolStack}, or the existing stack (if present)
*/
public synchronized ProtocolStack createForkStack(
String fork_stack_id, List<Protocol> protocols, boolean initialize) throws Exception {
Protocol bottom;
if ((bottom = get(fork_stack_id)) != null) {
ForkProtocolStack retval = getForkStack(bottom);
return initialize ? retval.incrInits() : retval;
}
List<Protocol> prots = new ArrayList<>();
prots.add(
bottom =
new ForkProtocol(fork_stack_id)
.setDownProtocol(this)); // add a ForkProtocol as bottom protocol
if (protocols != null) prots.addAll(protocols);
ForkProtocolStack fork_stack =
(ForkProtocolStack)
new ForkProtocolStack(getUnknownForkHandler(), prots, fork_stack_id)
.setChannel(this.stack.getChannel());
fork_stack.init();
if (initialize) fork_stack.incrInits();
fork_stacks.put(fork_stack_id, bottom);
return fork_stack;
}