com.hazelcast.client.cache.impl.ClientClusterWideIterator Maven / Gradle / Ivy

/*
 * Copyright (c) 2008-2015, 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.client.cache.impl;

import com.hazelcast.cache.impl.AbstractClusterWideIterator;
import com.hazelcast.cache.impl.CacheKeyIteratorResult;
import com.hazelcast.client.impl.HazelcastClientInstanceImpl;
import com.hazelcast.client.impl.protocol.ClientMessage;
import com.hazelcast.client.impl.protocol.codec.CacheIterateCodec;
import com.hazelcast.client.spi.ClientContext;
import com.hazelcast.client.spi.impl.ClientInvocation;
import com.hazelcast.client.spi.impl.ClientInvocationFuture;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.util.ExceptionUtil;

import javax.cache.Cache;
import java.util.Iterator;

/**
 * Client side cluster-wide iterator for {@link com.hazelcast.cache.ICache}.
 * 
 * This implementation is used by client implementation of jcache.
 * 
 * Note: For more information on the iterator details, see {@link AbstractClusterWideIterator}.
 *
 * @param  the type of key.
 * @param  the type of value.
 */
public class ClientClusterWideIterator
        extends AbstractClusterWideIterator
        implements Iterator> {

    private ClientCacheProxy cacheProxy;
    private ClientContext context;

    public ClientClusterWideIterator(ClientCacheProxy cacheProxy, ClientContext context) {
        super(cacheProxy, context.getPartitionService().getPartitionCount());
        this.cacheProxy = cacheProxy;
        this.context = context;
        advance();
    }

    protected CacheKeyIteratorResult fetch() {
        ClientMessage request = CacheIterateCodec
                .encodeRequest(cacheProxy.getNameWithPrefix(), partitionIndex, lastTableIndex, fetchSize);
        HazelcastClientInstanceImpl client = (HazelcastClientInstanceImpl) context.getHazelcastInstance();
        try {
            ClientInvocation clientInvocation = new ClientInvocation(client, request, partitionIndex);
            ClientInvocationFuture f = clientInvocation.invoke();
            return toObject(CacheIterateCodec.decodeResponse(f.get()).response);
        } catch (Exception e) {
            throw ExceptionUtil.rethrow(e);
        }
    }

    @Override
    protected Data toData(Object obj) {
        return context.getSerializationService().toData(obj);
    }

    @Override
    protected  T toObject(Object data) {
        return context.getSerializationService().toObject(data);
    }

}