/*
* Copyright (c) 2008-2013, 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.operation;
import com.hazelcast.cache.impl.CacheDataSerializerHook;
import com.hazelcast.cache.impl.CacheKeyIteratorResult;
import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.DefaultData;
import com.hazelcast.spi.ReadonlyOperation;
import java.io.IOException;
/**
* <p>Provides iterator functionality for ICache.</p>
* <p>
* Initializes and grabs a number of keys defined by <code>size</code> parameter from the
* {@link com.hazelcast.cache.impl.ICacheRecordStore} with the last table index.
* </p>
* @see com.hazelcast.cache.impl.ICacheRecordStore#iterator(int, int)
*/
public class CacheKeyIteratorOperation
extends AbstractCacheOperation
implements ReadonlyOperation {
private int tableIndex;
private int size;
public CacheKeyIteratorOperation() {
}
public CacheKeyIteratorOperation(String name, int tableIndex, int size) {
super(name, new DefaultData());
this.tableIndex = tableIndex;
this.size = size;
}
@Override
public int getId() {
return CacheDataSerializerHook.KEY_ITERATOR;
}
@Override
public void run()
throws Exception {
final CacheKeyIteratorResult iterator = this.cache.iterator(tableIndex, size);
response = iterator;
}
@Override
protected void writeInternal(ObjectDataOutput out)
throws IOException {
super.writeInternal(out);
out.writeInt(tableIndex);
out.writeInt(size);
}
@Override
protected void readInternal(ObjectDataInput in)
throws IOException {
super.readInternal(in);
tableIndex = in.readInt();
size = in.readInt();
}
}