ClusterFenceManagerImpl.java example

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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
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// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.
package com.cloud.cluster;

import java.util.List;
import java.util.Map;

import javax.inject.Inject;
import javax.naming.ConfigurationException;

import org.apache.log4j.Logger;
import org.springframework.stereotype.Component;

import com.cloud.utils.component.ManagerBase;

@Component
public class ClusterFenceManagerImpl extends ManagerBase implements ClusterFenceManager, ClusterManagerListener {
    private static final Logger s_logger = Logger.getLogger(ClusterFenceManagerImpl.class);

    @Inject
    ClusterManager _clusterMgr;

    @Override
    public boolean configure(String name, Map<String, Object> params) throws ConfigurationException {
        _clusterMgr.registerListener(this);
        return true;
    }

    @Override
    public void onManagementNodeJoined(List<? extends ManagementServerHost> nodeList, long selfNodeId) {
    }

    @Override
    public void onManagementNodeLeft(List<? extends ManagementServerHost> nodeList, long selfNodeId) {
    }

    @Override
    public void onManagementNodeIsolated() {
        s_logger.error("Received node isolation notification, will perform self-fencing and shut myself down");
        System.exit(SELF_FENCING_EXIT_CODE);
    }
}