/** {@inheritDoc} */
@Override
public void close() throws GridException {
closeLock.lock();
try {
if (routineId == null)
throw new IllegalStateException("Can't cancel query that was not executed.");
ctx.kernalContext().continuous().stopRoutine(routineId).get();
} finally {
closeLock.unlock();
}
}
/**
* @param ctx Cache context.
* @param topic Topic for ordered messages.
* @param prjPred Projection predicate.
*/
GridCacheContinuousQueryAdapter(
GridCacheContext<K, V> ctx,
Object topic,
@Nullable GridPredicate<GridCacheEntry<K, V>> prjPred) {
assert ctx != null;
assert topic != null;
this.ctx = ctx;
this.topic = topic;
this.prjPred = prjPred;
log = ctx.logger(getClass());
}
/** {@inheritDoc} */
@Override
public void execute(@Nullable GridProjection prj) throws GridException {
if (cb == null)
throw new IllegalStateException("Mandatory local callback is not set for the query: " + this);
if (prj == null) prj = ctx.grid();
prj = prj.forCache(ctx.name());
if (prj.nodes().isEmpty())
throw new GridTopologyException("Failed to execute query (projection is empty): " + this);
GridCacheMode mode = ctx.config().getCacheMode();
if (mode == LOCAL || mode == REPLICATED) {
Collection<GridNode> nodes = prj.nodes();
GridNode node = nodes.contains(ctx.localNode()) ? ctx.localNode() : F.rand(nodes);
assert node != null;
if (nodes.size() > 1 && !ctx.cache().isDrSystemCache()) {
if (node.id().equals(ctx.localNodeId()))
U.warn(
log,
"Continuous query for "
+ mode
+ " cache can be run only on local node. "
+ "Will execute query locally: "
+ this);
else
U.warn(
log,
"Continuous query for "
+ mode
+ " cache can be run only on single node. "
+ "Will execute query on remote node [qry="
+ this
+ ", node="
+ node
+ ']');
}
prj = prj.forNode(node);
}
closeLock.lock();
try {
if (routineId != null)
throw new IllegalStateException("Continuous query can't be executed twice.");
guard.block();
GridContinuousHandler hnd =
new GridCacheContinuousQueryHandler<>(ctx.name(), topic, cb, filter, prjPred);
routineId =
ctx.kernalContext()
.continuous()
.startRoutine(hnd, bufSize, timeInterval, autoUnsubscribe, prj.predicate())
.get();
} finally {
closeLock.unlock();
}
}