com.googlecode.jmxtrans.model.output.kafka.KafkaWriter2.java Source code

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Here is the source code for com.googlecode.jmxtrans.model.output.kafka.KafkaWriter2.java

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/**
 * The MIT License
 * Copyright  2010 JmxTrans team
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
package com.googlecode.jmxtrans.model.output.kafka;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.google.common.annotations.VisibleForTesting;
import com.googlecode.jmxtrans.exceptions.LifecycleException;
import com.googlecode.jmxtrans.model.OutputWriterAdapter;
import com.googlecode.jmxtrans.model.Query;
import com.googlecode.jmxtrans.model.Result;
import com.googlecode.jmxtrans.model.Server;
import lombok.AccessLevel;
import lombok.Getter;
import org.apache.kafka.clients.producer.KafkaProducer;
import org.apache.kafka.clients.producer.Producer;
import org.apache.kafka.clients.producer.ProducerRecord;

import javax.annotation.Nonnull;
import java.util.Collections;
import java.util.Map;

public class KafkaWriter2 extends OutputWriterAdapter {
    @Nonnull
    @Getter(AccessLevel.PROTECTED)
    private final ObjectMapper objectMapper;
    @Nonnull
    @Getter
    private final Map<String, Object> producerConfig;
    @Nonnull
    @Getter
    private final String topic;
    private final Producer<String, String> producer;
    @Nonnull
    @Getter
    private final ResultSerializer resultSerializer;

    public KafkaWriter2(@Nonnull ObjectMapper objectMapper, @Nonnull Map<String, Object> producerConfig,
            @Nonnull String topic, @Nonnull ResultSerializer resultSerializer) {
        this.objectMapper = objectMapper;
        this.producerConfig = producerConfig;
        this.topic = topic;
        this.resultSerializer = resultSerializer;
        producer = new KafkaProducer<String, String>(producerConfig);
    }

    @VisibleForTesting
    KafkaWriter2(@Nonnull ObjectMapper objectMapper, Producer<String, String> producer, @Nonnull String topic,
            @Nonnull ResultSerializer resultSerializer) {
        this.objectMapper = objectMapper;
        this.producerConfig = Collections.emptyMap();
        this.topic = topic;
        this.resultSerializer = resultSerializer;
        this.producer = producer;
    }

    @Override
    public void doWrite(Server server, Query query, Iterable<Result> results) throws Exception {
        for (Result result : results) {
            for (String message : resultSerializer.serialize(server, query, result)) {
                producer.send(new ProducerRecord<String, String>(topic, message));
            }
        }
    }

    @Override
    public void close() throws LifecycleException {
        producer.close();
    }
}