/** * Sends query request. * * @param fut Distributed future. * @param req Request. * @param nodes Nodes. * @throws IgniteCheckedException In case of error. */ @SuppressWarnings("unchecked") private void sendRequest( final GridCacheDistributedQueryFuture<?, ?, ?> fut, final GridCacheQueryRequest req, Collection<ClusterNode> nodes) throws IgniteCheckedException { assert fut != null; assert req != null; assert nodes != null; final UUID locNodeId = cctx.localNodeId(); ClusterNode locNode = null; Collection<ClusterNode> rmtNodes = null; for (ClusterNode n : nodes) { if (n.id().equals(locNodeId)) locNode = n; else { if (rmtNodes == null) rmtNodes = new ArrayList<>(nodes.size()); rmtNodes.add(n); } } // Request should be sent to remote nodes before the query is processed on the local node. // For example, a remote reducer has a state, we should not serialize and then send // the reducer changed by the local node. if (!F.isEmpty(rmtNodes)) { cctx.io() .safeSend( rmtNodes, req, cctx.ioPolicy(), new P1<ClusterNode>() { @Override public boolean apply(ClusterNode node) { fut.onNodeLeft(node.id()); return !fut.isDone(); } }); } if (locNode != null) { cctx.closures() .callLocalSafe( new Callable<Object>() { @Override public Object call() throws Exception { req.beforeLocalExecution(cctx); processQueryRequest(locNodeId, req); return null; } }); } }
/** * Processes cache query request. * * @param sndId Sender node id. * @param req Query request. */ @SuppressWarnings("unchecked") @Override void processQueryRequest(UUID sndId, GridCacheQueryRequest req) { if (req.cancel()) { cancelIds.add(new CancelMessageId(req.id(), sndId)); if (req.fields()) removeFieldsQueryResult(sndId, req.id()); else removeQueryResult(sndId, req.id()); } else { if (!cancelIds.contains(new CancelMessageId(req.id(), sndId))) { if (!F.eq(req.cacheName(), cctx.name())) { GridCacheQueryResponse res = new GridCacheQueryResponse( cctx.cacheId(), req.id(), new IgniteCheckedException( "Received request for incorrect cache [expected=" + cctx.name() + ", actual=" + req.cacheName())); sendQueryResponse(sndId, res, 0); } else { threads.put(req.id(), Thread.currentThread()); try { GridCacheQueryInfo info = distributedQueryInfo(sndId, req); if (info == null) return; if (req.fields()) runFieldsQuery(info); else runQuery(info); } catch (Throwable e) { U.error(log(), "Failed to run query.", e); sendQueryResponse( sndId, new GridCacheQueryResponse(cctx.cacheId(), req.id(), e.getCause()), 0); if (e instanceof Error) throw (Error) e; } finally { threads.remove(req.id()); } } } } }
/** {@inheritDoc} */ @Override void onQueryFutureCanceled(long reqId) { cancelled.add(reqId); }