/*
 * Copyright 2009-2013 by The Regents of the University of California
 * 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 from
 * 
 *     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 edu.uci.ics.hyracks.control.nc.dataset;

import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.logging.Logger;

import edu.uci.ics.hyracks.api.comm.IFrameWriter;
import edu.uci.ics.hyracks.api.context.IHyracksTaskContext;
import edu.uci.ics.hyracks.api.dataset.IDatasetPartitionManager;
import edu.uci.ics.hyracks.api.dataset.ResultSetId;
import edu.uci.ics.hyracks.api.exceptions.HyracksDataException;
import edu.uci.ics.hyracks.api.exceptions.HyracksException;
import edu.uci.ics.hyracks.api.io.IWorkspaceFileFactory;
import edu.uci.ics.hyracks.api.job.JobId;
import edu.uci.ics.hyracks.api.partitions.ResultSetPartitionId;

public class DatasetPartitionWriter implements IFrameWriter {
    private static final Logger LOGGER = Logger.getLogger(DatasetPartitionWriter.class.getName());

    private final IDatasetPartitionManager manager;

    private final JobId jobId;

    private final ResultSetId resultSetId;

    private final boolean asyncMode;

    private final int partition;

    private final DatasetMemoryManager datasetMemoryManager;

    private final ResultSetPartitionId resultSetPartitionId;

    private final ResultState resultState;

    public DatasetPartitionWriter(IHyracksTaskContext ctx, IDatasetPartitionManager manager, JobId jobId,
            ResultSetId rsId, boolean asyncMode, int partition, DatasetMemoryManager datasetMemoryManager,
            IWorkspaceFileFactory fileFactory) {
        this.manager = manager;
        this.jobId = jobId;
        this.resultSetId = rsId;
        this.asyncMode = asyncMode;
        this.partition = partition;
        this.datasetMemoryManager = datasetMemoryManager;

        resultSetPartitionId = new ResultSetPartitionId(jobId, rsId, partition);
        resultState = new ResultState(resultSetPartitionId, asyncMode, ctx.getIOManager(), fileFactory,
                ctx.getFrameSize());
    }

    public ResultState getResultState() {
        return resultState;
    }

    @Override
    public void open() {
        if (LOGGER.isLoggable(Level.INFO)) {
            LOGGER.info("open(" + partition + ")");
        }
        resultState.open();
    }

    @Override
    public void nextFrame(ByteBuffer buffer) throws HyracksDataException {
        if (datasetMemoryManager == null) {
            resultState.write(buffer);
        } else {
            resultState.write(datasetMemoryManager, buffer);
        }
    }

    @Override
    public void fail() throws HyracksDataException {
        try {
            resultState.closeAndDelete();
            resultState.abort();
            manager.reportPartitionFailure(jobId, resultSetId, partition);
        } catch (HyracksException e) {
            throw new HyracksDataException(e);
        }
    }

    @Override
    public void close() throws HyracksDataException {
        if (LOGGER.isLoggable(Level.INFO)) {
            LOGGER.info("close(" + partition + ")");
        }

        try {
            resultState.close();
            manager.reportPartitionWriteCompletion(jobId, resultSetId, partition);
        } catch (HyracksException e) {
            throw new HyracksDataException(e);
        }
    }
}