com.opensoc.enrichment.common.AbstractEnrichmentBolt.java Source code

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Here is the source code for com.opensoc.enrichment.common.AbstractEnrichmentBolt.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 com.opensoc.enrichment.common;

import java.io.IOException;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import org.json.simple.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import backtype.storm.task.OutputCollector;
import backtype.storm.task.TopologyContext;
import backtype.storm.topology.base.BaseRichBolt;

import com.codahale.metrics.Counter;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.opensoc.enrichment.interfaces.EnrichmentAdapter;
import com.opensoc.metrics.MetricReporter;

@SuppressWarnings("rawtypes")
public abstract class AbstractEnrichmentBolt extends BaseRichBolt {
    /**
     * Abstract enrichment bolt
     */
    private static final long serialVersionUID = -6710596708304282838L;

    protected static final Logger LOG = LoggerFactory.getLogger(AbstractEnrichmentBolt.class);

    protected OutputCollector _collector;
    protected String _OutputFieldName;

    protected String _enrichment_tag;
    protected Long _MAX_CACHE_SIZE_OBJECTS_NUM;
    protected Long _MAX_TIME_RETAIN_MINUTES;

    // JSON Keys to be enriched
    protected List<String> _jsonKeys;
    protected EnrichmentAdapter _adapter;
    protected MetricReporter _reporter;

    protected transient CacheLoader<String, JSONObject> loader;
    protected transient LoadingCache<String, JSONObject> cache;

    protected Counter ackCounter, emitCounter, failCounter;

    protected void registerCounters() {

        String ackString = _adapter.getClass().getSimpleName() + ".ack";

        String emitString = _adapter.getClass().getSimpleName() + ".emit";

        String failString = _adapter.getClass().getSimpleName() + ".fail";

        ackCounter = _reporter.registerCounter(ackString);
        emitCounter = _reporter.registerCounter(emitString);
        failCounter = _reporter.registerCounter(failString);

    }

    public final void prepare(Map conf, TopologyContext topologyContext, OutputCollector collector) {
        _collector = collector;

        if (this._OutputFieldName == null)
            throw new IllegalStateException("OutputFieldName must be specified");
        if (this._enrichment_tag == null)
            throw new IllegalStateException("enrichment_tag must be specified");
        if (this._MAX_CACHE_SIZE_OBJECTS_NUM == null)
            throw new IllegalStateException("MAX_CACHE_SIZE_OBJECTS_NUM must be specified");
        if (this._MAX_TIME_RETAIN_MINUTES == null)
            throw new IllegalStateException("MAX_TIME_RETAIN_MINUTES must be specified");
        if (this._adapter == null)
            throw new IllegalStateException("Adapter must be specified");
        if (this._jsonKeys == null)
            throw new IllegalStateException("JSON Keys to be enriched, must be specified");

        loader = new CacheLoader<String, JSONObject>() {
            public JSONObject load(String key) throws Exception {
                return _adapter.enrich(key);
            }
        };

        cache = CacheBuilder.newBuilder().maximumSize(_MAX_CACHE_SIZE_OBJECTS_NUM)
                .expireAfterWrite(_MAX_TIME_RETAIN_MINUTES, TimeUnit.MINUTES).build(loader);

        boolean success = _adapter.initializeAdapter();

        if (!success) {
            LOG.error("[OpenSOC] EnrichmentBolt could not initialize adapter");
            throw new IllegalStateException("Could not initialize adapter...");
        }

        try {
            doPrepare(conf, topologyContext, collector);
        } catch (IOException e) {
            LOG.error("[OpenSOC] Counld not initialize...");
            e.printStackTrace();
        }

    }

    abstract void doPrepare(Map conf, TopologyContext topologyContext, OutputCollector collector)
            throws IOException;

}