DefaultMasterChangedListener.java

package io.blobkeeper.cluster.service;

/*
 * Copyright (C) 2015 by Denis M. Gabaydulin
 *
 * 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.
 */

import io.blobkeeper.cluster.domain.Node;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.inject.Inject;
import javax.inject.Singleton;

@Singleton
public class DefaultMasterChangedListener implements MasterChangedListener {
    private static final Logger log = LoggerFactory.getLogger(DefaultMasterChangedListener.class);

    @Override
    public void onMasterChanged(@NotNull Node selfNode, @Nullable Node oldMaster, @Nullable Node newMaster) {
        log.info("Master is changed on node {}. Old : new {} : {}", selfNode, oldMaster, newMaster);
    }
}