core/store/dist/src/main/java/org/onlab/onos/store/hz/StoreManager.java

/*
 * Copyright 2014 Open Networking Laboratory
 *
 * 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 org.onlab.onos.store.hz;

import com.hazelcast.config.Config;
import com.hazelcast.config.FileSystemXmlConfig;
import com.hazelcast.config.MapConfig;
import com.hazelcast.core.Hazelcast;
import com.hazelcast.core.HazelcastInstance;

import org.apache.felix.scr.annotations.Activate;
import org.apache.felix.scr.annotations.Component;
import org.apache.felix.scr.annotations.Deactivate;
import org.apache.felix.scr.annotations.Service;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.FileNotFoundException;

/**
 * Auxiliary bootstrap of distributed store.
 */
@Component(immediate = true)
@Service
public class StoreManager implements StoreService {

    protected static final String HAZELCAST_XML_FILE = "etc/hazelcast.xml";

    private final Logger log = LoggerFactory.getLogger(getClass());

    protected HazelcastInstance instance;

    @Activate
    public void activate() {
        try {
            Config config = new FileSystemXmlConfig(HAZELCAST_XML_FILE);

            MapConfig roles = config.getMapConfig("nodeRoles");
            roles.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - roles.getBackupCount());

            MapConfig terms = config.getMapConfig("terms");
            terms.setAsyncBackupCount(MapConfig.MAX_BACKUP_COUNT - terms.getBackupCount());

            instance = Hazelcast.newHazelcastInstance(config);
            log.info("Started");
        } catch (FileNotFoundException e) {
            log.error("Unable to configure Hazelcast", e);
        }
    }

    @Deactivate
    public void deactivate() {
        instance.shutdown();
        log.info("Stopped");
    }

    @Override
    public HazelcastInstance getHazelcastInstance() {
        return instance;
    }

}