spring boot druid動態多數據源監控集成

　　當常常有發生鏈接池滿獲取不到鏈接時，能夠開啓druid監控，在鏈接都正常關閉的應用中，不該該出現下列警告，以下：

10:53:39.927 [Druid-ConnectionPool-Destroy--877824563] ERROR com.alibaba.druid.pool.DruidDataSource - abandon connection, owner thread: http-nio-8066-exec-8, connected at : 1579574585225, open stackTrace
    at java.lang.Thread.getStackTrace(Thread.java:1161)
    at com.alibaba.druid.pool.DruidDataSource.getConnectionDirect(DruidDataSource.java:1450)
    at com.alibaba.druid.filter.FilterChainImpl.dataSource_connect(FilterChainImpl.java:5059)
    at com.alibaba.druid.filter.FilterAdapter.dataSource_getConnection(FilterAdapter.java:2756)
    at com.alibaba.druid.filter.FilterChainImpl.dataSource_connect(FilterChainImpl.java:5055)
    at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1359)
    at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1351)
    at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:78)
    at org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource.getConnection(AbstractRoutingDataSource.java:164)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
    at org.mybatis.spring.transaction.SpringManagedTransaction.openConnection(SpringManagedTransaction.java:86)
    at org.mybatis.spring.transaction.SpringManagedTransaction.getConnection(SpringManagedTransaction.java:72)
    at org.apache.ibatis.session.defaults.DefaultSqlSession.getConnection(DefaultSqlSession.java:298)
    at com.yidoo.xxx.datasource.DBContextHolder.setTargetDataSource(DBContextHolder.java:74)
    at com.yidoo.xxx.datasource.DBContextHolder.setTargetDataSource(DBContextHolder.java:26)
    at com.yidoo.xxx.datasource.DataSourceAspect.before(DataSourceAspect.java:47)
    at sun.reflect.GeneratedMethodAccessor309.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
    at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:609)
    at org.springframework.aop.aspectj.AspectJMethodBeforeAdvice.before(AspectJMethodBeforeAdvice.java:43)
    at org.springframework.aop.framework.adapter.MethodBeforeAdviceInterceptor.invoke(MethodBeforeAdviceInterceptor.java:55)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.aspectj.AspectJAfterAdvice.invoke(AspectJAfterAdvice.java:47)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
    at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:671)
    at com.yidoo.xxx.base.service.ErrorLogServiceImpl$$EnhancerBySpringCGLIB$$68c9d6f3.addSysErrorLog(<generated>)
    at com.yidoo.xxx.base.TaException.saveErrorLog(TaException.java:91)
    at com.yidoo.xxx.base.TaException.<init>(TaException.java:52)
    at com.yidoo.xxx.base.BaseConfig.getConfig(BaseConfig.java:113)
    at com.yidoo.xxx.base.BaseConfig.getConfig(BaseConfig.java:118)
    at com.yidoo.xxx.filter.xss.XssAndSqlHttpServletRequestWrapper.getParameter(XssAndSqlHttpServletRequestWrapper.java:59)
    at com.yidoo.xxx.filter.xss.XssAndSqlHttpServletRequestWrapper.<init>(XssAndSqlHttpServletRequestWrapper.java:37)
    at com.yidoo.xxx.filter.XssFilter.doFilter(XssFilter.java:17)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:84)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:111)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:100)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:528)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:747)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:609)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:810)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1506)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:819)
ownerThread current state is WAITING, current stackTrace
    at sun.misc.Unsafe.park(Native Method)
    at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
    at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.await(AbstractQueuedSynchronizer.java:2039)
    at java.util.concurrent.LinkedBlockingQueue.take(LinkedBlockingQueue.java:442)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:103)
    at org.apache.tomcat.util.threads.TaskQueue.take(TaskQueue.java:31)
    at java.util.concurrent.ThreadPoolExecutor.getTask(ThreadPoolExecutor.java:1074)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1134)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:819)

要查看活躍的鏈接堆棧，須要開啓下列選項：
dyn.spring.datasources[0].removeAbandoned=true
dyn.spring.datasources[0].removeAbandonedTimeout=600
dyn.spring.datasources[0].logAbandoned=true

　　按照druid的文檔配置對應的fitler，便可同時監控多數據源，包括在sharding jdbc中的數據源。

　　這樣在發生鏈接獲取不到時就可以找到哪些邏輯沒有正常關閉鏈接。

　　現在，hikaricp很火，也是spring boot 2.0默認的內置數據源。不過它沒有自帶的監控體系，經過JMX暴露，通用的作法是採用MicroMeter+Prometheu。

druid 獲取鏈接鎖優化

花若怒放，蝶自飛來，你若精彩，幸福開懷！2020年12月11日-18日