com.autsia.socialboot.infrastructure.syncronization.ClusterMembershipListener.java Source code

Introduction

Here is the source code for com.autsia.socialboot.infrastructure.syncronization.ClusterMembershipListener.java

Source

/*
 *    Copyright 2015 Dmytro Titov
 *
 *    Licensed 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.autsia.socialboot.infrastructure.syncronization;

import com.autsia.socialboot.SocialBootApplication;
import com.hazelcast.core.MemberAttributeEvent;
import com.hazelcast.core.MembershipEvent;
import com.hazelcast.core.MembershipListener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
 * Listener for events related to Hazelcast nodes lifecycle
 * (e.g. new node appears, existing node removes etc.)
 */
@Component
public class ClusterMembershipListener implements MembershipListener, ApplicationContextAware {

    private static final Logger LOGGER = LoggerFactory.getLogger(ClusterMembershipListener.class);

    private ApplicationContext applicationContext;

    @Override
    public void memberAdded(MembershipEvent membershipEvent) {
        LOGGER.info("Member added: {}", membershipEvent);
    }

    @Override
    public void memberRemoved(MembershipEvent membershipEvent) {
        Boolean isMasterNode = membershipEvent.getMember()
                .getBooleanAttribute(SocialBootApplication.IS_MASTER_NODE);
        if (isMasterNode) {
            applicationContext.getBean(NodeManager.class).selectNewMasterNode();
        }
        LOGGER.info("Member removed: {}", membershipEvent);
    }

    @Override
    public void memberAttributeChanged(MemberAttributeEvent memberAttributeEvent) {
        LOGGER.info("Member attribute changed: {}", memberAttributeEvent);
    }

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

}