/**
* @param rmtReducer Optional reducer.
* @param rmtTransform Optional transformer.
* @param args Arguments.
* @return Future.
*/
@SuppressWarnings("IfMayBeConditional")
private <R> GridCacheQueryFuture<R> execute(
@Nullable GridReducer<T, R> rmtReducer,
@Nullable GridClosure<T, R> rmtTransform,
@Nullable Object... args) {
Collection<GridNode> nodes = nodes();
cctx.checkSecurity(GridSecurityPermission.CACHE_READ);
if (F.isEmpty(nodes))
return new GridCacheQueryErrorFuture<>(
cctx.kernalContext(),
new GridEmptyProjectionException("There are no data nodes for cache: " + cctx.namexx()));
if (log.isDebugEnabled())
log.debug("Executing query [query=" + this + ", nodes=" + nodes + ']');
if (cctx.deploymentEnabled()) {
try {
cctx.deploy().registerClasses(filter, rmtReducer, rmtTransform);
cctx.deploy().registerClasses(args);
} catch (GridException e) {
return new GridCacheQueryErrorFuture<>(cctx.kernalContext(), e);
}
}
if (subjId == null) subjId = cctx.localNodeId();
taskHash = cctx.kernalContext().job().currentTaskNameHash();
GridCacheQueryBean bean =
new GridCacheQueryBean(
this,
(GridReducer<Object, Object>) rmtReducer,
(GridClosure<Object, Object>) rmtTransform,
args);
GridCacheQueryManager qryMgr = cctx.queries();
boolean loc = nodes.size() == 1 && F.first(nodes).id().equals(cctx.localNodeId());
if (type == SQL_FIELDS)
return (GridCacheQueryFuture<R>)
(loc ? qryMgr.queryFieldsLocal(bean) : qryMgr.queryFieldsDistributed(bean, nodes));
else
return (GridCacheQueryFuture<R>)
(loc ? qryMgr.queryLocal(bean) : qryMgr.queryDistributed(bean, nodes));
}
/** @return Nodes to execute on. */
private Collection<GridNode> nodes() {
GridCacheMode cacheMode = cctx.config().getCacheMode();
switch (cacheMode) {
case LOCAL:
if (prj != null)
U.warn(
log,
"Ignoring query projection because it's executed over LOCAL cache "
+ "(only local node will be queried): "
+ this);
return Collections.singletonList(cctx.localNode());
case REPLICATED:
if (prj != null) return nodes(cctx, prj);
GridCacheDistributionMode mode = cctx.config().getDistributionMode();
return mode == PARTITIONED_ONLY || mode == NEAR_PARTITIONED
? Collections.singletonList(cctx.localNode())
: Collections.singletonList(F.rand(nodes(cctx, null)));
case PARTITIONED:
return nodes(cctx, prj);
default:
throw new IllegalStateException("Unknown cache distribution mode: " + cacheMode);
}
}
/**
* @param id ID.
* @param name Name.
* @param age Age.
* @param orgId Organization ID.
*/
private Person(int id, String name, int age, int orgId) {
assert !F.isEmpty(name);
assert age > 0;
assert orgId > 0;
this.id = id;
this.name = name;
this.age = age;
this.orgId = orgId;
}
/**
* @param cctx Cache context.
* @param prj Projection (optional).
* @return Collection of data nodes in provided projection (if any).
*/
private static Collection<GridNode> nodes(
final GridCacheContext<?, ?> cctx, @Nullable final GridProjection prj) {
assert cctx != null;
return F.view(
CU.allNodes(cctx),
new P1<GridNode>() {
@Override
public boolean apply(GridNode n) {
GridCacheDistributionMode mode = U.distributionMode(n, cctx.name());
return (mode == PARTITIONED_ONLY || mode == NEAR_PARTITIONED)
&& (prj == null || prj.node(n.id()) != null);
}
});
}
/** {@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();
}
}
