RedisHealthCheck.java

/**
 * Copyright (C) 2013 Open WhisperSystems
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.whispersystems.textsecuregcm.providers;

import com.codahale.metrics.health.HealthCheck;

import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;

public class RedisHealthCheck extends HealthCheck {

  private final JedisPool clientPool;

  public RedisHealthCheck(JedisPool clientPool) {
    this.clientPool = clientPool;
  }

  @Override
  protected Result check() throws Exception {
    Jedis client = clientPool.getResource();

    try {
      client.set("HEALTH", "test");

      if (!"test".equals(client.get("HEALTH"))) {
        return Result.unhealthy("fetch failed");
      }

      return Result.healthy();
    } finally {
      clientPool.returnResource(client);
    }
  }
}