HeartbeatMonitorFactoryBean.java

/*
 * 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.nifi.cluster.spring;

import org.apache.nifi.cluster.coordination.ClusterCoordinator;
import org.apache.nifi.cluster.coordination.heartbeat.ClusterProtocolHeartbeatMonitor;
import org.apache.nifi.cluster.coordination.heartbeat.HeartbeatMonitor;
import org.apache.nifi.cluster.protocol.impl.ClusterCoordinationProtocolSenderListener;
import org.apache.nifi.util.NiFiProperties;
import org.springframework.beans.BeansException;
import org.springframework.beans.factory.FactoryBean;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;

public class HeartbeatMonitorFactoryBean implements FactoryBean<HeartbeatMonitor>, ApplicationContextAware {
    private ApplicationContext applicationContext;
    private NiFiProperties properties;

    private HeartbeatMonitor heartbeatMonitor = null;

    @Override
    public HeartbeatMonitor getObject() throws Exception {
        if (heartbeatMonitor == null && properties.isNode()) {
            final ClusterCoordinationProtocolSenderListener protocolSenderListener =
                    applicationContext.getBean("clusterCoordinationProtocolSenderListener", ClusterCoordinationProtocolSenderListener.class);
            final ClusterCoordinator clusterCoordinator = applicationContext.getBean("clusterCoordinator", ClusterCoordinator.class);

            heartbeatMonitor = new ClusterProtocolHeartbeatMonitor(clusterCoordinator, protocolSenderListener, properties);
        }

        return heartbeatMonitor;
    }

    @Override
    public Class<?> getObjectType() {
        return HeartbeatMonitor.class;
    }

    @Override
    public boolean isSingleton() {
        return true;
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    public void setProperties(NiFiProperties properties) {
        this.properties = properties;
    }

}