/** @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 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));
}
/**
* @param cctx Context.
* @param type Query type.
* @param clsName Class name.
* @param clause Clause.
* @param filter Scan filter.
* @param incMeta Include metadata flag.
* @param keepPortable Keep portable flag.
* @param prjPred Cache projection filter.
*/
public GridCacheQueryAdapter(
GridCacheContext<?, ?> cctx,
GridCacheQueryType type,
@Nullable GridPredicate<GridCacheEntry<Object, Object>> prjPred,
@Nullable String clsName,
@Nullable String clause,
@Nullable GridBiPredicate<Object, Object> filter,
boolean incMeta,
boolean keepPortable) {
assert cctx != null;
assert type != null;
this.cctx = cctx;
this.type = type;
this.clsName = clsName;
this.clause = clause;
this.prjPred = prjPred;
this.filter = filter;
this.incMeta = incMeta;
this.keepPortable = keepPortable;
log = cctx.logger(getClass());
pageSize = DFLT_PAGE_SIZE;
timeout = 0;
keepAll = true;
incBackups = false;
dedup = false;
prj = null;
metrics = new GridCacheQueryMetricsAdapter();
}
/**
* @param res Query result.
* @param err Error or {@code null} if query executed successfully.
* @param startTime Start time.
* @param duration Duration.
*/
public void onExecuted(Object res, Throwable err, long startTime, long duration) {
boolean fail = err != null;
// Update own metrics.
metrics.onQueryExecute(duration, fail);
// Update metrics in query manager.
cctx.queries().onMetricsUpdate(duration, fail);
if (log.isDebugEnabled())
log.debug(
"Query execution finished [qry="
+ this
+ ", startTime="
+ startTime
+ ", duration="
+ duration
+ ", fail="
+ fail
+ ", res="
+ res
+ ']');
}
/** @throws GridException If query is invalid. */
public void validate() throws GridException {
if (type != SCAN && !cctx.config().isQueryIndexEnabled())
throw new GridException("Indexing is disabled for cache: " + cctx.cache().name());
}