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Core Hazelcast Module
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/*
 * Copyright (c) 2008-2016, 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.impl.client;

import com.hazelcast.client.ClientEndpoint;
import com.hazelcast.core.ExecutionCallback;
import com.hazelcast.spi.InvocationBuilder;
import com.hazelcast.spi.Operation;

/**
 * Base class for partition based client request.
 */
public abstract class PartitionClientRequest extends ClientRequest implements ExecutionCallback {

    /**
     * Called on node side, before starting any operation.
     */
    protected void beforeProcess() {
    }

    /**
     * Called on node side, after process is run and right before sending the response to the client.
     */
    protected void beforeResponse() {
    }

    /**
     * Called on node side, after sending the response to the client.
     */
    protected void afterResponse() {
    }

    @Override
    public final void process() {
        beforeProcess();
        ClientEndpoint endpoint = getEndpoint();
        Operation op = prepareOperation();
        op.setCallerUuid(endpoint.getUuid());
        InvocationBuilder builder = operationService.createInvocationBuilder(getServiceName(), op, getPartition())
                .setReplicaIndex(getReplicaIndex())
                .setExecutionCallback(this)
                .setResultDeserialized(false);

        builder.invoke();
    }

    protected abstract Operation prepareOperation();

    protected abstract int getPartition();

    protected int getReplicaIndex() {
        return 0;
    }

    protected Object filter(Object response) {
        return response;
    }

    @Override
    public final void onResponse(Object object) {
        beforeResponse();
        endpoint.sendResponse(filter(object), getCallId());
        afterResponse();
    }

    @Override
    public final void onFailure(Throwable t) {
        onResponse(t);
    }
}