Mmuzaf commented on a change in pull request #6951: Ignite 11073 12069 P2P Rebalance collaboration work URL: https://github.com/apache/ignite/pull/6951#discussion_r410553276
########## File path: modules/core/src/main/java/org/apache/ignite/internal/processors/cache/distributed/dht/preloader/IgnitePartitionPreloadManager.java ########## @@ -0,0 +1,337 @@ +/* + * 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.cache.distributed.dht.preloader; + +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import java.util.Set; +import java.util.UUID; +import java.util.concurrent.locks.Lock; +import java.util.concurrent.locks.ReentrantLock; +import org.apache.ignite.IgniteSystemProperties; +import org.apache.ignite.cache.CacheRebalanceMode; +import org.apache.ignite.cluster.BaselineNode; +import org.apache.ignite.cluster.ClusterNode; +import org.apache.ignite.internal.IgniteFeatures; +import org.apache.ignite.internal.IgniteInternalFuture; +import org.apache.ignite.internal.processors.affinity.AffinityAssignment; +import org.apache.ignite.internal.processors.affinity.AffinityTopologyVersion; +import org.apache.ignite.internal.processors.cache.CacheGroupContext; +import org.apache.ignite.internal.processors.cache.GridCacheContext; +import org.apache.ignite.internal.processors.cache.GridCacheSharedManagerAdapter; +import org.apache.ignite.internal.processors.cache.distributed.dht.topology.GridDhtLocalPartition; +import org.apache.ignite.internal.util.future.GridFinishedFuture; +import org.apache.ignite.internal.util.typedef.F; +import org.apache.ignite.internal.util.typedef.internal.CU; + +import static org.apache.ignite.IgniteSystemProperties.IGNITE_DISABLE_WAL_DURING_REBALANCING; +import static org.apache.ignite.IgniteSystemProperties.IGNITE_FILE_REBALANCE_ENABLED; +import static org.apache.ignite.IgniteSystemProperties.IGNITE_FILE_REBALANCE_THRESHOLD; +import static org.apache.ignite.cache.CacheAtomicityMode.ATOMIC; +import static org.apache.ignite.configuration.IgniteConfiguration.DFLT_PDS_WAL_REBALANCE_THRESHOLD; +import static org.apache.ignite.internal.processors.cache.GridCacheUtils.UTILITY_CACHE_NAME; +import static org.apache.ignite.internal.processors.cache.distributed.dht.topology.GridDhtPartitionState.MOVING; + +/** + * DHT cache partition files preloader. + */ +public class IgnitePartitionPreloadManager extends GridCacheSharedManagerAdapter { + /** */ + private final boolean fileRebalanceEnabled = + IgniteSystemProperties.getBoolean(IGNITE_FILE_REBALANCE_ENABLED, true); + + /** */ + private final long fileRebalanceThreshold = + IgniteSystemProperties.getLong(IGNITE_FILE_REBALANCE_THRESHOLD, DFLT_PDS_WAL_REBALANCE_THRESHOLD); + + /** Lock. */ + private final Lock lock = new ReentrantLock(); + + /** Partition File rebalancing routine. */ + private volatile PartitionPreloadingRoutine partPreloadingRoutine; + + /** {@inheritDoc} */ + @Override protected void stop0(boolean cancel) { + lock.lock(); + + try { + if (partPreloadingRoutine != null) + partPreloadingRoutine.onDone(false); + } + finally { + lock.unlock(); + } + } + + /** + * @param exchId Exchange ID. + * @param exchFut Completed exchange future. Can be {@code null} if forced or reassigned generation occurs. + * @param rebalanceId Rebalance id. + * @param forcePreload {@code True} if preload requested by {@link ForceRebalanceExchangeTask}. + * @return Cache group identifiers with future assignments that will be ready when partitions are preloaded. + */ + public Map<Integer, IgniteInternalFuture<GridDhtPreloaderAssignments>> generateAssignments( + GridDhtPartitionExchangeId exchId, + GridDhtPartitionsExchangeFuture exchFut, + long rebalanceId, + boolean forcePreload + ) { + Map<UUID, Map<Integer, Set<Integer>>> filePreloadingAssignments = new HashMap<>(); + Map<Integer, IgniteInternalFuture<GridDhtPreloaderAssignments>> futAssigns = new HashMap<>(); + + for (final CacheGroupContext grp : cctx.cache().cacheGroups()) { Review comment: CacheGroupContext can be `null` here. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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