| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.ignite.internal.processors.query.h2.opt; |
| |
| import java.util.Objects; |
| import org.apache.ignite.internal.processors.query.h2.opt.join.DistributedJoinContext; |
| import org.apache.ignite.internal.processors.query.h2.twostep.PartitionReservation; |
| import org.apache.ignite.internal.util.typedef.internal.S; |
| import org.apache.ignite.spi.indexing.IndexingQueryFilter; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Thread local SQL query context which is intended to be accessible from everywhere. |
| */ |
| public class QueryContext { |
| /** |
| * Thread local query context is used for API that doesn't support h2 Session: |
| * distributed join and rowCount. |
| */ |
| private static final ThreadLocal<QueryContext> qctxThreaded = new ThreadLocal<>(); |
| |
| /** Segment ID. */ |
| private final int segment; |
| |
| /** */ |
| private final IndexingQueryFilter filter; |
| |
| /** Distributed join context. */ |
| private final DistributedJoinContext distributedJoinCtx; |
| |
| /** */ |
| private final PartitionReservation reservations; |
| |
| /** {@code True} for local queries, {@code false} for distributed ones. */ |
| private final boolean loc; |
| |
| /** |
| * Constructor. |
| * |
| * @param segment Index segment ID. |
| * @param filter Filter. |
| * @param distributedJoinCtx Distributed join context. |
| * @param loc {@code True} for local queries, {@code false} for distributed ones. |
| */ |
| @SuppressWarnings("AssignmentOrReturnOfFieldWithMutableType") |
| public QueryContext( |
| int segment, |
| @Nullable IndexingQueryFilter filter, |
| @Nullable DistributedJoinContext distributedJoinCtx, |
| @Nullable PartitionReservation reservations, |
| boolean loc |
| ) { |
| this.segment = segment; |
| this.filter = filter; |
| this.distributedJoinCtx = distributedJoinCtx; |
| this.reservations = reservations; |
| this.loc = loc; |
| } |
| |
| /** |
| * @param filter Filter. |
| * @param local Local query flag. |
| * @return Context for parsing. |
| */ |
| public static QueryContext parseContext(@Nullable IndexingQueryFilter filter, boolean local) { |
| return new QueryContext( |
| 0, |
| filter, |
| null, |
| null, |
| local); |
| } |
| |
| /** |
| * @return Distributed join context. |
| */ |
| @Nullable public DistributedJoinContext distributedJoinContext() { |
| return distributedJoinCtx; |
| } |
| |
| /** |
| * @return Index segment ID. |
| */ |
| public int segment() { |
| return segment; |
| } |
| |
| /** |
| * @param nodeStop Node is stopping. |
| */ |
| @SuppressWarnings("ForLoopReplaceableByForEach") |
| public void clearContext(boolean nodeStop) { |
| if (distributedJoinCtx != null) |
| distributedJoinCtx.cancel(); |
| |
| if (!nodeStop && reservations != null) |
| reservations.release(); |
| } |
| |
| /** |
| * @return Filter. |
| */ |
| public IndexingQueryFilter filter() { |
| return filter; |
| } |
| |
| /** |
| * @return {@code True} for local queries, {@code false} for distributed ones. |
| */ |
| public boolean local() { |
| return loc; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public String toString() { |
| return S.toString(QueryContext.class, this); |
| } |
| |
| /** |
| * Hack with thread local context is used only for H2 methods that is called without Session object. |
| * e.g. GridH2Table.getRowCountApproximation (used only on optimization phase, after parse). |
| * |
| * @param qctx Context. |
| */ |
| public static void threadLocal(QueryContext qctx) { |
| qctxThreaded.set(qctx); |
| } |
| |
| /** |
| * Hack with thread local context is used only for H2 methods that is called without Session object. |
| * e.g. GridH2Table.getRowCountApproximation (used only on optimization phase, after parse). |
| * |
| * @return Thread local context. |
| */ |
| public static QueryContext threadLocal() { |
| QueryContext qctx = qctxThreaded.get(); |
| |
| assert Objects.nonNull(qctx); |
| |
| return qctx; |
| } |
| } |