Many resources are needed to download a project. Please understand that we have to compensate our server costs. Thank you in advance. Project price only 1 $
You can buy this project and download/modify it how often you want.
/*
* Copyright (c) 2008-2021, 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.internal.serialization.Data;
import com.hazelcast.internal.serialization.SerializationService;
import com.hazelcast.spi.impl.InternalCompletableFuture;
import com.hazelcast.spi.impl.operationservice.Operation;
import com.hazelcast.spi.impl.operationservice.OperationService;
import javax.cache.Cache;
import java.util.Iterator;
import java.util.List;
/**
* Iterator for iterating cache entries over multiple partitions.
* The values are fetched in batches. This implementation is used for embedded mode.
* NOTE
* The iteration may be done when the map is being mutated or when there are
* membership changes. The iterator does not reflect the state when it has
* been constructed - it may return some entries that were added after the
* iteration has started and may not return some entries that were removed
* after iteration has started.
* The iterator will not, however, skip an entry if it has not been changed
* and will not return an entry twice.
* For more information on the iterator details, see
* {@link AbstractCacheIterator}.
*/
public class CacheIterator
extends AbstractCacheIterator
implements Iterator> {
private final SerializationService serializationService;
private final CacheProxy cacheProxy;
public CacheIterator(CacheProxy cache, boolean prefetchValues) {
this(cache, DEFAULT_FETCH_SIZE, prefetchValues);
}
public CacheIterator(CacheProxy cache, int fetchSize, boolean prefetchValues) {
super(cache, cache.getNodeEngine().getPartitionService().getPartitionCount(), fetchSize, prefetchValues);
this.cacheProxy = cache;
this.serializationService = cache.getNodeEngine().getSerializationService();
advance();
}
public CacheIterator(CacheProxy cache, int fetchSize, int partitionId, boolean prefetchValues) {
super(cache, cache.getNodeEngine().getPartitionService().getPartitionCount(), fetchSize, prefetchValues);
this.cacheProxy = cache;
this.serializationService = cache.getNodeEngine().getSerializationService();
this.partitionIndex = partitionId;
advance();
}
protected List fetch() {
final OperationService operationService = cacheProxy.getNodeEngine().getOperationService();
if (prefetchValues) {
Operation operation = cacheProxy.operationProvider.createFetchEntriesOperation(pointers, fetchSize);
CacheEntriesWithCursor iteratorResult = invoke(operationService, operation);
setIterationPointers(iteratorResult.getEntries(), iteratorResult.getPointers());
return iteratorResult.getEntries();
} else {
Operation operation = cacheProxy.operationProvider.createFetchKeysOperation(pointers, fetchSize);
CacheKeysWithCursor iteratorResult = invoke(operationService, operation);
setIterationPointers(iteratorResult.getKeys(), iteratorResult.getPointers());
return iteratorResult.getKeys();
}
}
private T invoke(OperationService operationService, Operation operation) {
InternalCompletableFuture f = operationService
.invokeOnPartition(CacheService.SERVICE_NAME, operation, partitionIndex);
return f.joinInternal();
}
@Override
protected Data toData(Object obj) {
return serializationService.toData(obj);
}
@Override
protected T toObject(Object data) {
return serializationService.toObject(data);
}
}