brooklyn.entity.messaging.kafka.KafkaBrokerImpl.java Source code

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Here is the source code for brooklyn.entity.messaging.kafka.KafkaBrokerImpl.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 brooklyn.entity.messaging.kafka;

import java.util.Map;
import java.util.concurrent.TimeUnit;

import javax.management.ObjectName;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import brooklyn.entity.basic.Entities;
import brooklyn.entity.basic.SoftwareProcessImpl;
import brooklyn.entity.messaging.MessageBroker;
import brooklyn.entity.proxying.EntitySpec;
import brooklyn.entity.zookeeper.ZooKeeperNode;
import brooklyn.event.feed.jmx.JmxAttributePollConfig;
import brooklyn.event.feed.jmx.JmxFeed;
import brooklyn.event.feed.jmx.JmxHelper;

import com.google.common.base.Functions;
import com.google.common.base.Objects.ToStringHelper;

/**
 * An {@link brooklyn.entity.Entity} that represents a single Kafka broker instance.
 */
public class KafkaBrokerImpl extends SoftwareProcessImpl implements MessageBroker, KafkaBroker {

    @SuppressWarnings("unused")
    private static final Logger log = LoggerFactory.getLogger(KafkaBrokerImpl.class);
    private static final ObjectName SOCKET_SERVER_STATS_MBEAN = JmxHelper
            .createObjectName("kafka:type=kafka.SocketServerStats");

    private volatile JmxFeed jmxFeed;

    public KafkaBrokerImpl() {
        super();
    }

    @Override
    public void init() {
        super.init();
        setAttribute(BROKER_ID, Math.abs(hashCode())); // Must be positive for partitioning to work
    }

    @Override
    public Integer getKafkaPort() {
        return getAttribute(KAFKA_PORT);
    }

    @Override
    public Integer getBrokerId() {
        return getAttribute(BROKER_ID);
    }

    @Override
    public ZooKeeperNode getZookeeper() {
        return getConfig(ZOOKEEPER);
    }

    public KafkaTopic createTopic(Map<?, ?> properties) {
        KafkaTopic result = addChild(EntitySpec.create(KafkaTopic.class).configure(properties));
        Entities.manage(result);
        result.create();
        return result;
    }

    @Override
    public Class<?> getDriverInterface() {
        return KafkaBrokerDriver.class;
    }

    @Override
    public void waitForServiceUp(long duration, TimeUnit units) {
        super.waitForServiceUp(duration, units);

        if (((KafkaBrokerDriver) getDriver()).isJmxEnabled()) {
            // Wait for the MBean to exist
            JmxHelper helper = new JmxHelper(this);
            try {
                helper.assertMBeanExistsEventually(SOCKET_SERVER_STATS_MBEAN, units.toMillis(duration));
            } finally {
                helper.terminate();
            }
        }
    }

    @Override
    protected void connectSensors() {
        connectServiceUpIsRunning();

        if (((KafkaBrokerDriver) getDriver()).isJmxEnabled()) {
            jmxFeed = JmxFeed.builder().entity(this).period(500, TimeUnit.MILLISECONDS)
                    .pollAttribute(new JmxAttributePollConfig<Long>(FETCH_REQUEST_COUNT)
                            .objectName(SOCKET_SERVER_STATS_MBEAN).attributeName("NumFetchRequests")
                            .onException(Functions.constant(-1l)))
                    .pollAttribute(
                            new JmxAttributePollConfig<Long>(TOTAL_FETCH_TIME).objectName(SOCKET_SERVER_STATS_MBEAN)
                                    .attributeName("TotalFetchRequestMs").onException(Functions.constant(-1l)))
                    .pollAttribute(
                            new JmxAttributePollConfig<Double>(MAX_FETCH_TIME).objectName(SOCKET_SERVER_STATS_MBEAN)
                                    .attributeName("MaxFetchRequestMs").onException(Functions.constant(-1.0d)))
                    .pollAttribute(new JmxAttributePollConfig<Long>(PRODUCE_REQUEST_COUNT)
                            .objectName(SOCKET_SERVER_STATS_MBEAN).attributeName("NumProduceRequests")
                            .onException(Functions.constant(-1l)))
                    .pollAttribute(new JmxAttributePollConfig<Long>(TOTAL_PRODUCE_TIME)
                            .objectName(SOCKET_SERVER_STATS_MBEAN).attributeName("TotalProduceRequestMs")
                            .onException(Functions.constant(-1l)))
                    .pollAttribute(new JmxAttributePollConfig<Double>(MAX_PRODUCE_TIME)
                            .objectName(SOCKET_SERVER_STATS_MBEAN).attributeName("MaxProduceRequestMs")
                            .onException(Functions.constant(-1.0d)))
                    .pollAttribute(
                            new JmxAttributePollConfig<Long>(BYTES_RECEIVED).objectName(SOCKET_SERVER_STATS_MBEAN)
                                    .attributeName("TotalBytesRead").onException(Functions.constant(-1l)))
                    .pollAttribute(
                            new JmxAttributePollConfig<Long>(BYTES_SENT).objectName(SOCKET_SERVER_STATS_MBEAN)
                                    .attributeName("TotalBytesWritten").onException(Functions.constant(-1l)))
                    .build();
        }

        setBrokerUrl();
    }

    @Override
    public void disconnectSensors() {
        super.disconnectSensors();
        disconnectServiceUpIsRunning();
        if (jmxFeed != null)
            jmxFeed.stop();
    }

    @Override
    protected ToStringHelper toStringHelper() {
        return super.toStringHelper().add("kafkaPort", getKafkaPort());
    }

    /** Use the {@link #getZookeeper() zookeeper} details if available, otherwise use our own host and port. */
    @Override
    public void setBrokerUrl() {
        ZooKeeperNode zookeeper = getZookeeper();
        if (zookeeper != null) {
            setAttribute(BROKER_URL, String.format("zookeeper://%s:%d", zookeeper.getAttribute(HOSTNAME),
                    zookeeper.getZookeeperPort()));
        } else {
            setAttribute(BROKER_URL, String.format("kafka://%s:%d", getAttribute(HOSTNAME), getKafkaPort()));
        }
    }

}