org.apache.metron.common.writer.BulkWriterComponent.java Source code

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Here is the source code for org.apache.metron.common.writer.BulkWriterComponent.java

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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.metron.common.writer;

import backtype.storm.task.OutputCollector;
import backtype.storm.tuple.Tuple;
import com.google.common.collect.Iterables;
import org.apache.metron.common.Constants;
import org.apache.metron.common.configuration.Configurations;
import org.apache.metron.common.configuration.writer.WriterConfiguration;
import org.apache.metron.common.interfaces.BulkMessageWriter;
import org.apache.metron.common.utils.ErrorUtils;
import org.apache.metron.common.utils.MessageUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.*;
import java.util.function.Function;

public class BulkWriterComponent<MESSAGE_T> {
    public static final Logger LOG = LoggerFactory.getLogger(BulkWriterComponent.class);
    private Map<String, Collection<Tuple>> sensorTupleMap = new HashMap<>();
    private Map<String, List<MESSAGE_T>> sensorMessageMap = new HashMap<>();
    private OutputCollector collector;
    private boolean handleCommit = true;
    private boolean handleError = true;

    public BulkWriterComponent(OutputCollector collector) {
        this.collector = collector;
    }

    public BulkWriterComponent(OutputCollector collector, boolean handleCommit, boolean handleError) {
        this(collector);
        this.handleCommit = handleCommit;
        this.handleError = handleError;
    }

    public void commit(Iterable<Tuple> tuples) {
        tuples.forEach(t -> collector.ack(t));
        if (LOG.isDebugEnabled()) {
            LOG.debug("Acking " + Iterables.size(tuples) + " tuples");
        }
    }

    public void error(Throwable e, Iterable<Tuple> tuples) {
        tuples.forEach(t -> collector.ack(t));
        LOG.error("Failing " + Iterables.size(tuples) + " tuples", e);
        ErrorUtils.handleError(collector, e, Constants.ERROR_STREAM);
    }

    protected Collection<Tuple> createTupleCollection() {
        return new ArrayList<>();
    }

    public void write(String sensorType, Tuple tuple, MESSAGE_T message,
            BulkMessageWriter<MESSAGE_T> bulkMessageWriter, WriterConfiguration configurations) throws Exception {
        int batchSize = configurations.getBatchSize(sensorType);
        Collection<Tuple> tupleList = sensorTupleMap.get(sensorType);
        if (tupleList == null) {
            tupleList = createTupleCollection();
        }
        tupleList.add(tuple);
        List<MESSAGE_T> messageList = sensorMessageMap.get(sensorType);
        if (messageList == null) {
            messageList = new ArrayList<>();
        }
        messageList.add(message);

        if (tupleList.size() < batchSize) {
            sensorTupleMap.put(sensorType, tupleList);
            sensorMessageMap.put(sensorType, messageList);
        } else {
            try {
                bulkMessageWriter.write(sensorType, configurations, tupleList, messageList);
                if (handleCommit) {
                    commit(tupleList);
                }

            } catch (Throwable e) {
                if (handleError) {
                    error(e, tupleList);
                } else {
                    throw e;
                }
            } finally {
                sensorTupleMap.remove(sensorType);
                sensorMessageMap.remove(sensorType);
            }
        }
    }
}