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/*
 * 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.transaction.impl;

import com.hazelcast.nio.ObjectDataInput;
import com.hazelcast.nio.ObjectDataOutput;
import com.hazelcast.nio.serialization.Data;
import com.hazelcast.spi.NodeEngine;
import com.hazelcast.spi.Operation;
import com.hazelcast.spi.impl.SerializableCollection;

import java.io.IOException;
import java.util.HashSet;
import java.util.Set;

public class RecoverTxnOperation extends Operation {

    transient SerializableCollection response;

    public RecoverTxnOperation() {
    }

    @Override
    public void beforeRun() throws Exception {
    }

    @Override
    public void run() throws Exception {
        TransactionManagerServiceImpl txManagerService = getService();
        final Set recovered = txManagerService.recoverLocal();
        final Set recoveredData = new HashSet(recovered.size());
        final NodeEngine nodeEngine = getNodeEngine();
        for (RecoveredTransaction rt : recovered) {
            recoveredData.add(nodeEngine.toData(rt));
        }
        response = new SerializableCollection(recoveredData);
    }

    @Override
    public void afterRun() throws Exception {
    }

    @Override
    public boolean returnsResponse() {
        return true;
    }

    @Override
    public Object getResponse() {
        return response;
    }

    @Override
    protected void writeInternal(ObjectDataOutput out) throws IOException {
    }

    @Override
    protected void readInternal(ObjectDataInput in) throws IOException {
    }
}