Java tutorial
/* * Copyright 2012-2014 the original author or authors. * * 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.snowstore.mercury.indicator; import java.util.Properties; import org.springframework.beans.factory.InitializingBean; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.redis.connection.RedisConnection; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.connection.jedis.JedisConnectionFactory; import org.springframework.data.redis.core.RedisConnectionUtils; import org.springframework.util.Assert; import com.snowstore.mercury.core.health.Health; import com.snowstore.mercury.core.indicator.AbstractHealthIndicator; import com.snowstore.mercury.core.indicator.HealthIndicator; /** * Simple implementation of a {@link HealthIndicator} returning status * information for Redis data stores. * * @author sm */ public class RedisHealthIndicator extends AbstractHealthIndicator implements InitializingBean { @Autowired(required = false) private RedisConnectionFactory redisConnectionFactory; @Override protected void doHealthCheck(Health.Builder builder) throws Exception { if (valid) { RedisConnection connection = RedisConnectionUtils.getConnection(this.redisConnectionFactory); try { Properties info = connection.info(); builder.up().withDetail("version", info.getProperty("redis_version")); if (redisConnectionFactory instanceof JedisConnectionFactory) { JedisConnectionFactory jedisConnectionFactory = (JedisConnectionFactory) redisConnectionFactory; builder.withDetail(SERVER, jedisConnectionFactory.getHostName() + ":" + jedisConnectionFactory.getPort() + ":" + jedisConnectionFactory.getDatabase()); } addBuilder(builder); } finally { RedisConnectionUtils.releaseConnection(connection, this.redisConnectionFactory); } } else { builder.none(); } } @Override public void afterPropertiesSet() throws Exception { try { Assert.notNull(this.redisConnectionFactory, "ConnectionFactory must not be null"); if (redisConnectionFactory instanceof JedisConnectionFactory) { if (((JedisConnectionFactory) redisConnectionFactory).getHostName().equals("localhost")) { throw new RuntimeException(); } } } catch (Exception e) { valid = false; } } }