ElasticSearchHealthCheck.java

/**
 * Copyright 2014 Flipkart Internet Pvt. Ltd.
 *
 * 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.flipkart.foxtrot.server.healthcheck;

import com.flipkart.foxtrot.core.querystore.impl.ElasticsearchConnection;
import com.yammer.metrics.core.HealthCheck;
import org.elasticsearch.action.admin.cluster.health.ClusterHealthResponse;

/**
 * Created by rishabh.goyal on 15/05/14.
 */

public class ElasticSearchHealthCheck extends HealthCheck {
    private ElasticsearchConnection elasticsearchConnection;

    public ElasticSearchHealthCheck(String name, ElasticsearchConnection elasticsearchConnection) {
        super(name);
        this.elasticsearchConnection = elasticsearchConnection;
    }

    @Override
    protected HealthCheck.Result check() throws Exception {
        ClusterHealthResponse response = elasticsearchConnection
                .getClient()
                .admin()
                .cluster()
                .prepareHealth()
                .execute()
                .actionGet();
        return (response.getStatus().name().equalsIgnoreCase("GREEN")
                || response.getStatus().name().equalsIgnoreCase("YELLOW"))
                ? HealthCheck.Result.healthy() : HealthCheck.Result.unhealthy("Cluster unhealthy");
    }
}