Examples of com.sun.xml.ws.api.ha.HaInfo

com.sun.xml.ws.api.ha.HaInfo
This class has HA information
This would help a loadbalancer to put the request(in case of a fail-over) on a replica instance that has all the related data. Even if there is no loadbalancer, a backing store could locate the information by directly going to the correct replica instance. This would also help any part of the runtime to know about failover case(and in-turn may invalidate local caches).
To achieve this functionality, it carries two pieces of information:
1. key - Related {@link org.glassfish.ha.store.api.BackingStore} keys canuse this info for their HashableKey impl. First store creates this object, and subsequent related stores use the same key.
2. replicaInstance - where the related info is replicated
This can be accessed from {@link Packet} using {@link Packet#HA_INFO}property by the runtime. This object is created typically
- When a store happens for the first time
- A subsequent inbound transport creates from cookies
- A fail-over request stores the data to a different replica
@author Jitendra Kotamraju @since JAX-WS RI 2.2.2

        public void save(final K key, final V value, final boolean isNew) {
            if (LOGGER.isLoggable(Level.FINER)) {
                LOGGER.finer(loggerProlog + "sending for replication [key=" + key + ", value=" + value + ", isNew=" + isNew + "]");
            }            


            HaInfo haInfo = HaContext.currentHaInfo();
            if (haInfo != null) {
                if (LOGGER.isLoggable(Level.FINER)) {
                    LOGGER.finer(loggerProlog + "Existing HaInfo found, using it for data replication: " + HaContext.asString(haInfo));
                }
                HaContext.udpateReplicaInstance(HighAvailabilityProvider.saveTo(backingStore, new StickyKey(key, haInfo.getKey()), value, isNew));
            } else {
                final StickyKey stickyKey = new StickyKey(key);
                final String replicaId = HighAvailabilityProvider.saveTo(backingStore, stickyKey, value, isNew);
                
                haInfo = new HaInfo(stickyKey.getHashKey(), replicaId, false);
                HaContext.updateHaInfo(haInfo);
                if (LOGGER.isLoggable(Level.FINER)) {
                    LOGGER.finer(loggerProlog + "No HaInfo found, created new after data replication: " + HaContext.asString(haInfo));
                }
            }

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    };


    public static State initFrom(final Packet packet) {
        final State oldState = state.get();


        HaInfo haInfo = null;
        if (packet != null && packet.supports(Packet.HA_INFO)) {
            haInfo = (HaInfo) packet.get(Packet.HA_INFO);
        }
        final State newState = new State(packet, haInfo);
        state.set(newState);

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        if (updateNeeded) {
            if (LOGGER.isLoggable(Level.FINER)) {
                LOGGER.finer("[METRO-HA] " + Thread.currentThread().toString() + " : Replica instance value changed to '" + replicaInstance + "'. Updating current HaInfo.");
            }
            
            final HaInfo old = currentState.haInfo;
            updateHaInfo(new HaInfo(old.getKey(), replicaInstance, old.isFailOver()));
        } else if (LOGGER.isLoggable(Level.FINER)) {
            LOGGER.finer("[METRO-HA] " + Thread.currentThread().toString() + " : New replica instance value '" + replicaInstance + "' same as current - no HaInfo update necessary");
        }
    }

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            LOGGER.finer("[METRO-HA] " + Thread.currentThread().toString() + " : HaInfo value updated: " + asString(newValue));
        }
    }


    public static boolean failoverDetected() {
        final HaInfo haInfo = state.get().haInfo;
        return haInfo != null && haInfo.isFailOver();
    }

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