保存Druid的监控记录

继上篇帖子之后 , 公司又要求将Druid Monitor的监控信息保存起来 , 因为Druid的监控记录在是缓存的，重启之后无法找回，所以需要做持久化，定期把监控记录转存到日志文件中 研究了半天 , 将经验贴出来 , 希望可以帮到大家 , 少走点弯路 .

首先贴出Druid官方给出的方法   https://github.com/alibaba/druid/wiki/%E6%80%8E%E4%B9%88%E4%BF%9D%E5%AD%98Druid%E7%9A%84%E7%9B%91%E6%8E%A7%E8%AE%B0%E5%BD%95

废话不多说 , 直接进入正题 .

1. DataSource中增加配置：

   <!-- 每隔10分钟把监控数据输出到日志中 -->
   < property name ="timeBetweenLogStatsMillis" value ="600000" />
   <!-- 自定义实现输入监控数据到日志 -->
   < property name ="statLogger" ref ="localStatLogger" />

2. 定义bean

   < bean id ="localStatLogger" class ="com.hyde.tracker.server.druid.LocalStatLogger" ></ bean>

3. 类LocalStatLogger，重写API中的方法实现自定义的日志存储

   package com.hyde.tracker.server.druid;
    
   import static com.alibaba.druid.util.JdbcSqlStatUtils.rtrim;
    
   import java.net.URL;
   import java.util.ArrayList;
   import java.util.LinkedHashMap;
   import java.util.Map;
    
   import org.apache.log4j.PropertyConfigurator;
    
   import com.alibaba.druid.pool.DruidDataSourceStatLogger;
   import com.alibaba.druid.pool.DruidDataSourceStatLoggerAdapter;
   import com.alibaba.druid.pool.DruidDataSourceStatValue;
   import com.alibaba.druid.stat.JdbcSqlStatValue;
   import com.alibaba.druid.support.json.JSONUtils;
   import com.alibaba.druid.support.logging.Log;
   import com.alibaba.druid.support.logging.LogFactory;
    
   /**
    * @author WangHuijie<wanghuijie@carelink.cn>
    */
   public class LocalStatLogger extends DruidDataSourceStatLoggerAdapter implements DruidDataSourceStatLogger {
    
       private static final Log LOGGER = LogFactory.getLog(LocalStatLogger.class);
    
       /**
        * @see com.alibaba.druid.pool.DruidDataSourceStatLoggerAdapter#log(com.alibaba.druid.pool.DruidDataSourceStatValue)
        */
       @Override
       public void log(DruidDataSourceStatValue statValue) {
           
           Map<String, Object> map = new LinkedHashMap<String, Object>();
    
           /*map.put("url", statValue.getUrl());
           map.put("dbType", statValue.getDbType());*/
           map.put("name", statValue.getName());
           map.put("activeCount", statValue.getActiveCount());
    
           if (statValue.getActivePeak() > 0) {
               map.put("activePeak", statValue.getActivePeak());
               map.put("activePeakTime", statValue.getActivePeakTime());
           }
           map.put("poolingCount", statValue.getPoolingCount());
           if (statValue.getPoolingPeak() > 0) {
               map.put("poolingPeak", statValue.getPoolingPeak());
               map.put("poolingPeakTime", statValue.getPoolingPeakTime());
           }
           map.put("connectCount", statValue.getConnectCount());
           map.put("closeCount", statValue.getCloseCount());
    
           if (statValue.getWaitThreadCount() > 0) {
               map.put("waitThreadCount", statValue.getWaitThreadCount());
           }
    
           if (statValue.getNotEmptyWaitCount() > 0) {
               map.put("notEmptyWaitCount", statValue.getNotEmptyWaitCount());
           }
    
           if (statValue.getNotEmptyWaitMillis() > 0) {
               map.put("notEmptyWaitMillis", statValue.getNotEmptyWaitMillis());
           }
    
           if (statValue.getLogicConnectErrorCount() > 0) {
               map.put("logicConnectErrorCount", statValue.getLogicConnectErrorCount());
           }
    
           if (statValue.getPhysicalConnectCount() > 0) {
               map.put("physicalConnectCount", statValue.getPhysicalConnectCount());
           }
    
           if (statValue.getPhysicalCloseCount() > 0) {
               map.put("physicalCloseCount", statValue.getPhysicalCloseCount());
           }
    
           if (statValue.getPhysicalConnectErrorCount() > 0) {
               map.put("physicalConnectErrorCount", statValue.getPhysicalConnectErrorCount());
           }
    
           if (statValue.getExecuteCount() > 0) {
               map.put("executeCount", statValue.getExecuteCount());
           }
    
           if (statValue.getErrorCount() > 0) {
               map.put("errorCount", statValue.getErrorCount());
           }
    
           if (statValue.getCommitCount() > 0) {
               map.put("commitCount", statValue.getCommitCount());
           }
    
           if (statValue.getRollbackCount() > 0) {
               map.put("rollbackCount", statValue.getRollbackCount());
           }
    
           if (statValue.getPstmtCacheHitCount() > 0) {
               map.put("pstmtCacheHitCount", statValue.getPstmtCacheHitCount());
           }
    
           if (statValue.getPstmtCacheMissCount() > 0) {
               map.put("pstmtCacheMissCount", statValue.getPstmtCacheMissCount());
           }
    
           if (statValue.getStartTransactionCount() > 0) {
               map.put("startTransactionCount", statValue.getStartTransactionCount());
               map.put("transactionHistogram", rtrim(statValue.getTransactionHistogram()));
           }
    
           if (statValue.getConnectCount() > 0) {
               map.put("connectionHoldTimeHistogram", rtrim(statValue.getConnectionHoldTimeHistogram()));
           }
    
           if (statValue.getClobOpenCount() > 0) {
               map.put("clobOpenCount", statValue.getClobOpenCount());
           }
    
           if (statValue.getBlobOpenCount() > 0) {
               map.put("blobOpenCount", statValue.getBlobOpenCount());
           }
    
           if (statValue.getSqlSkipCount() > 0) {
               map.put("sqlSkipCount", statValue.getSqlSkipCount());
           }
    
           ArrayList<Map<String, Object>> sqlList = new ArrayList<Map<String, Object>>();
           if (statValue.getSqlList().size() > 0) {
               for (JdbcSqlStatValue sqlStat : statValue.getSqlList()) {
                   Map<String, Object> sqlStatMap = new LinkedHashMap<String, Object>();
                   sqlStatMap.put("sql", sqlStat.getSql());
    
                   if (sqlStat.getExecuteCount() > 0) {
                       sqlStatMap.put("executeCount", sqlStat.getExecuteCount());
                       sqlStatMap.put("executeMillisMax", sqlStat.getExecuteMillisMax());
                       sqlStatMap.put("executeMillisTotal", sqlStat.getExecuteMillisTotal());
    
                       sqlStatMap.put("executeHistogram", rtrim(sqlStat.getExecuteHistogram()));
                       sqlStatMap.put("executeAndResultHoldHistogram", rtrim(sqlStat.getExecuteAndResultHoldHistogram()));
                   }
    
                   long executeErrorCount = sqlStat.getExecuteErrorCount();
                   if (executeErrorCount > 0) {
                       sqlStatMap.put("executeErrorCount", executeErrorCount);
                   }
    
                   int runningCount = sqlStat.getRunningCount();
                   if (runningCount > 0) {
                       sqlStatMap.put("runningCount", runningCount);
                   }
    
                   int concurrentMax = sqlStat.getConcurrentMax();
                   if (concurrentMax > 0) {
                       sqlStatMap.put("concurrentMax", concurrentMax);
                   }
    
                   if (sqlStat.getFetchRowCount() > 0) {
                       sqlStatMap.put("fetchRowCount", sqlStat.getFetchRowCount());
                       sqlStatMap.put("fetchRowCount", sqlStat.getFetchRowCountMax());
                       sqlStatMap.put("fetchRowHistogram", rtrim(sqlStat.getFetchRowHistogram()));
                   }
    
                   if (sqlStat.getUpdateCount() > 0) {
                       sqlStatMap.put("updateCount", sqlStat.getUpdateCount());
                       sqlStatMap.put("updateCountMax", sqlStat.getUpdateCountMax());
                       sqlStatMap.put("updateHistogram", rtrim(sqlStat.getUpdateHistogram()));
                   }
    
                   if (sqlStat.getInTransactionCount() > 0) {
                       sqlStatMap.put("inTransactionCount", sqlStat.getInTransactionCount());
                   }
    
                   if (sqlStat.getClobOpenCount() > 0) {
                       sqlStatMap.put("clobOpenCount", sqlStat.getClobOpenCount());
                   }
    
                   if (sqlStat.getBlobOpenCount() > 0) {
                       sqlStatMap.put("blobOpenCount", sqlStat.getBlobOpenCount());
                   }
    
                   sqlList.add(sqlStatMap);
               }
    
               map.put("sqlList", sqlList);
           }
    
           String text = JSONUtils.toJSONString(map);
           
           beforeLog();
           LOGGER.info(text);
           afterLog();
       }
       
       /**
        * 在记录LOG前指定.properties文件
        */
       private void beforeLog() {
           
           propertyConfigure("/druid_log4j.properties");
       }
       
       /**
        * 在记录LOG后恢复指定本来的.properties文件
        */
       private void afterLog() {
           
           propertyConfigure("/log4j.properties");
       }
       
       /**
        * 指定.properties文件
        * @param filePath
        */
       private void propertyConfigure(String filePath) {
           
           URL resource = getClass().getResource(filePath);
           PropertyConfigurator.configure(resource);
       }
   }

4. log4j.properties，定义转存日志文件位置及名称

   log4j.rootLogger=INFO, druid, logfile
   log4j.appender.druid.Threshold=INFO
   log4j.appender.druid=org.apache.log4j.ConsoleAppender
   log4j.appender.druid.layout=org.apache.log4j.PatternLayout
   log4j.appender.druid.layout.ConversionPattern=%d %p [%c]:%L - %m%n
    
   log4j.appender.logfile.Threshold=INFO
   log4j.appender.logfile=org.apache.log4j.DailyRollingFileAppender
   log4j.appender.logfile.DatePattern='.'yyyy-MM-dd
   log4j.appender.logfile.File=../logs/druid/druid.log
   log4j.appender.logfile.layout=org.apache.log4j.PatternLayout
   log4j.appender.logfile.layout.ConversionPattern=[%d] - %m%n