com.codemacro.jcm.health.HealthCheckManager.java Source code

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Here is the source code for com.codemacro.jcm.health.HealthCheckManager.java

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/*******************************************************************************
 *  Copyright Kevin Lynx (kevinlynx@gmail.com) 2015
 *
 *    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.codemacro.jcm.health;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.codemacro.jcm.model.Cluster;
import com.codemacro.jcm.model.ClusterManager;
import com.codemacro.jcm.model.Common.CheckType;
import com.codemacro.jcm.model.Common.NodeStatus;
import com.codemacro.jcm.model.Common.OnlineStatus;
import com.codemacro.jcm.storage.StatusStorage;
import com.google.common.base.Predicate;
import com.google.common.collect.Maps;

public class HealthCheckManager implements CheckProvider {
    private static Logger logger = LoggerFactory.getLogger(HealthCheckManager.class);
    private Map<String, Cluster> checkClusters;
    private List<BaseChecker> checkers = new ArrayList<BaseChecker>();
    private ServerLocator locator = new ServerLocator();
    private StatusStorage statusStorage;
    private ClusterManager clusterManager;

    public HealthCheckManager() {
    }

    public HealthCheckManager(ClusterManager clusterManager, StatusStorage statusStorage) {
        this.clusterManager = clusterManager;
        this.statusStorage = statusStorage;
        checkClusters = new ConcurrentHashMap<String, Cluster>();
        checkers.add(new HttpChecker(this));
    }

    public void startup(int interval) {
        for (BaseChecker checker : checkers) {
            checker.setInterval(interval);
            checker.startup();
        }
    }

    public void shutdown() {
        for (BaseChecker checker : checkers) {
            checker.shutdown();
        }
    }

    // require thread-safe
    public Map<String, Cluster> getCheckClusters(final CheckType checkType) {
        return Maps.filterValues(checkClusters, new Predicate<Cluster>() {
            public boolean apply(Cluster cluster) {
                return cluster.getOnline() == OnlineStatus.ONLINE && cluster.getCheckType().equals(checkType);
            }
        });
    }

    public Set<String> getCheckClusterList() {
        return checkClusters.keySet();
    }

    // on several servers startup, the list changed quickly, but it does not matter
    public void onServerListChanged(List<String> ids, String selfId) {
        locator.serversChanged(selfId, ids);
        updateCheckedClusters();
    }

    public void onClusterListChanged() {
        updateCheckedClusters();
    }

    public void onClusterChanged() {
        updateCheckedClusters();
    }

    public void flushCheckResults(String clusterName, Map<String, NodeStatus> statusList) {
        statusStorage.writeStatusList(clusterName, statusList);
    }

    private void updateCheckedClusters() {
        this.checkClusters = new ConcurrentHashMap<String, Cluster>();
        for (Cluster cluster : clusterManager.getAll().values()) {
            if (locator.isResponsible(cluster.getName())) {
                checkClusters.put(cluster.getName(), cluster);
            }
        }
        this.statusStorage.removeInvalidCache(checkClusters.keySet());
        logger.info("update checked cluster list {}", checkClusters.size());
    }
}