66 lines
2.1 KiB
Java
66 lines
2.1 KiB
Java
/*
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* Copyright (c) 2014 Hewlett-Packard Development Company, L.P.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.hpcloud.mon.infrastructure.thresholding;
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import com.hpcloud.mon.EventSpoutConfig;
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import com.hpcloud.mon.infrastructure.thresholding.deserializer.EventDeserializer;
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import backtype.storm.spout.SpoutOutputCollector;
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import backtype.storm.topology.OutputFieldsDeclarer;
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import backtype.storm.tuple.Values;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.io.Serializable;
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import java.util.List;
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public class EventSpout extends KafkaSpout {
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private static final Logger logger = LoggerFactory.getLogger(EventSpout.class);
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private static final long serialVersionUID = 8457340455857276878L;
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private final EventDeserializer deserializer;
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public EventSpout(EventSpoutConfig configuration, EventDeserializer deserializer) {
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super(configuration);
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this.deserializer = deserializer;
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logger.info("EventSpout created");
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}
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@Override
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public void declareOutputFields(OutputFieldsDeclarer declarer) {
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declarer.declare(deserializer.getOutputFields());
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}
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@Override
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protected void processMessage(byte[] message, SpoutOutputCollector collector) {
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List<List<?>> events = deserializer.deserialize(message);
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if (events != null) {
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for (final List<?> event : events) {
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final Object eventToSend = event.get(0);
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if (!(eventToSend instanceof Serializable)) {
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logger.error("Class {} is not Serializable: {}", eventToSend.getClass(), eventToSend);
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continue;
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}
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collector.emit(new Values(eventToSend));
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}
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}
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}
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}
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