com.hazelcast.cache.impl.CacheSplitBrainHandlerService Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2020, Hazelcast, Inc. All Rights Reserved.
*
* Licensed 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 com.hazelcast.cache.impl;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.impl.merge.AbstractSplitBrainHandlerService;
import com.hazelcast.spi.merge.DiscardMergePolicy;
import java.util.Collection;
import java.util.Iterator;
import static com.hazelcast.cache.impl.ICacheService.SERVICE_NAME;
import static com.hazelcast.util.ThreadUtil.assertRunningOnPartitionThread;
/**
* Handles split-brain functionality for cache.
*/
class CacheSplitBrainHandlerService extends AbstractSplitBrainHandlerService {
private final CacheService cacheService;
private final CachePartitionSegment[] segments;
CacheSplitBrainHandlerService(NodeEngine nodeEngine, CachePartitionSegment[] segments) {
super(nodeEngine);
this.segments = segments;
this.cacheService = nodeEngine.getService(SERVICE_NAME);
}
@Override
protected Runnable newMergeRunnable(Collection mergingStores) {
return new CacheMergeRunnable(mergingStores, this, cacheService.nodeEngine);
}
@Override
protected Iterator storeIterator(int partitionId) {
return segments[partitionId].recordStoreIterator();
}
@Override
protected void destroyStore(ICacheRecordStore store) {
assertRunningOnPartitionThread();
store.destroyInternals();
}
@Override
protected boolean hasEntries(ICacheRecordStore store) {
assertRunningOnPartitionThread();
return store.size() > 0;
}
@Override
protected boolean hasMergeablePolicy(ICacheRecordStore store) {
Object mergePolicy = cacheService.getMergePolicy(store.getName());
return !(mergePolicy instanceof DiscardMergePolicy);
}
}