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/*******************************************************************************
* Copyright 2016-2017 ZTE, Inc. and others.
*
* 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.onap.msb.apiroute.health;
import java.text.SimpleDateFormat;
import org.onap.msb.apiroute.wrapper.util.JedisUtil;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.codahale.metrics.health.HealthCheck;
import redis.clients.jedis.Jedis;
public class RedisHealthCheck extends HealthCheck implements Runnable {
private static final Logger LOGGER = LoggerFactory.getLogger(RedisHealthCheck.class);
public static boolean writeCheckFlag = true;
private static Result result = Result.healthy();
private static int failedLoopCheckNum = 12;
private static int failedTimer = 5 * 1000;
private static int normalTimer = 20 * 1000;
public static Result getResult() {
return result;
}
@Override
protected Result check() {
// check write
if (writeCheckFlag) {
Result writeCheckResult = checkWrite();
if (writeCheckResult.isHealthy()) {
writeCheckFlag = false;
}
// write failed
if (!writeCheckResult.isHealthy()) {
return writeCheckResult;
}
}
// check read
Result readCheckResult = checkRead();
// read failed
if (!readCheckResult.isHealthy()) {
return readCheckResult;
}
return Result.healthy();
}
private Result checkRead() {
Jedis jedisHandle = null;
Result healthRst = Result.healthy();
try {
jedisHandle = JedisUtil.borrowJedisInstance();
jedisHandle.get("healthchek:checktime");
} catch (Exception e) {
LOGGER.warn("RedisHealthCheck exception", e);
healthRst = Result.unhealthy(e);
} finally {
JedisUtil.returnJedisInstance(jedisHandle);
}
return healthRst;
}
private Result checkWrite() {
Jedis jedisHandle = null;
Result healthRst = Result.healthy();
try {
long currentTime = System.currentTimeMillis();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String date = sdf.format(currentTime);
jedisHandle = JedisUtil.borrowJedisInstance();
String statusCode = jedisHandle.set("healthchek:checktime", date);
if (statusCode != null && statusCode.equals("OK")) {
healthRst = Result.healthy("check redis:" + statusCode);
} else {
healthRst = Result.unhealthy("check redis:" + statusCode);
}
} catch (Exception e) {
LOGGER.warn("RedisHealthCheck exception", e);
healthRst = Result.unhealthy(e);
} finally {
JedisUtil.returnJedisInstance(jedisHandle);
}
return healthRst;
}
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("redis check starttime:" + System.currentTimeMillis());
}
result = checkWithPolicy();
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("redis check result:" + result.isHealthy() + " message:" + result.getMessage());
LOGGER.debug("redis check endtime:" + System.currentTimeMillis());
}
try {
Thread.sleep(normalTimer);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
LOGGER.warn("loop check redis,thread sleep excepiton", e);
}
}
}
private Result checkWithPolicy() {
int failedNum = 0;
Result temp = Result.healthy();
do {
// check again
temp = check();
// healthy break;
if (temp.isHealthy()) {
break;
}
// unhealthy go on
failedNum++;
try {
Thread.sleep(failedTimer);
} catch (InterruptedException e) {
// TODO Auto-generated catch block
LOGGER.warn("loop check redis,thread sleep excepiton", e);
}
} while (failedNum <= failedLoopCheckNum);
return temp;
}
}
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