java - Spring处理数据库连接异常

Question

我有一个 Spring 应用程序，其中数据库连接对于应用程序的操作来说是次要的。我希望应用程序能够继续正常运行，无论是否能够连接到数据库。

我正在使用 Spring 框架 (jdbcTemplate) 和 HikariCP。当应用程序以功能数据库启动时，一切都很好。如果我在应用程序启动后停止数据库，则会出现未捕获的连接异常(请参阅下面的堆栈跟踪)，因为它们未经检查，会导致应用程序中出现其他问题。我想捕获这些连接异常并以不同的方式处理它们。

我已经尝试使用Spring的自定义sql错误代码转换器(SQLErrorCodeSQLExceptionTranslator)注入(inject)到jdbcTemplate中，但是该类没有被调用，我想因为这是一个套接字/网络异常不是 sql 异常。

有人知道如何轻松捕获连接异常吗？我在多个 DAO 中多次调用 jdbcTemplate，因此在每个 DAO 周围放置一个 try/catch 并不是理想的答案。还有其他办法吗？

Jun 02, 2016 5:06:31 PM org.glassfish.grizzly.http.server.HttpHandler doHandle
WARNING: service exception
org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 1030ms.
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:80)
    at org.springframework.jdbc.core.JdbcTemplate.execute(JdbcTemplate.java:390)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:470)
    at org.springframework.jdbc.core.JdbcTemplate.query(JdbcTemplate.java:480)
    at com.pevco.persist.xaction.XactionDaoImpl.getAllXactsBetweenDateTimes(XactionDaoImpl.java:1372)
    at com.pevco.nexgen.service.TransactionActivityService.getXactionContextJSONDataByDate(TransactionActivityService.java:206)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at com.sun.jersey.spi.container.JavaMethodInvokerFactory$1.invoke(JavaMethodInvokerFactory.java:60)
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:185)
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75)
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:302)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108)
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147)
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1511)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1442)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1391)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1381)
    at com.sun.jersey.server.impl.container.grizzly2.GrizzlyContainer._service(GrizzlyContainer.java:215)
    at com.sun.jersey.server.impl.container.grizzly2.GrizzlyContainer.service(GrizzlyContainer.java:185)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:164)
    at org.glassfish.grizzly.http.server.HttpHandlerChain.service(HttpHandlerChain.java:196)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:164)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:175)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:265)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:200)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:134)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:78)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:815)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:567)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:547)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.sql.SQLTransientConnectionException: HikariPool-0 - Connection is not available, request timed out after 1030ms.
    at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:195)
    at com.zaxxer.hikari.pool.HikariPool.getConnection(HikariPool.java:147)
    at com.zaxxer.hikari.HikariDataSource.getConnection(HikariDataSource.java:83)
    at org.springframework.jdbc.datasource.DataSourceUtils.doGetConnection(DataSourceUtils.java:111)
    at org.springframework.jdbc.datasource.DataSourceUtils.getConnection(DataSourceUtils.java:77)
    ... 41 more
Caused by: java.sql.SQLException: Login timed out.
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:433)
    at net.sourceforge.jtds.jdbc.Driver.connect(Driver.java:184)
    at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:314)
    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:171)
    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:436)
    at com.zaxxer.hikari.pool.HikariPool.access$500(HikariPool.java:65)
    at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:567)
    at com.zaxxer.hikari.pool.HikariPool$PoolEntryCreator.call(HikariPool.java:560)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    ... 1 more
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:345)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at net.sourceforge.jtds.jdbc.SharedSocket.createSocketForJDBC3(SharedSocket.java:288)
    at net.sourceforge.jtds.jdbc.SharedSocket.<init>(SharedSocket.java:251)
    at net.sourceforge.jtds.jdbc.JtdsConnection.<init>(JtdsConnection.java:331)
    ... 12 more

Answer 1

您只是想抑制记录的警告还是想要做其他事情？

如果是第一种情况，只需将日志记录级别设置为 ERROR 或 FATAL ;) 异常已经发生，此时您唯一能做的就是优雅地恢复。假设您想关闭连接池并在 X 分钟后重新连接，那么您可以尝试使用 after throwing AOP 方法 - 请记住，您必须在关闭和重新启动时确保线程安全。

您可以使用类似的方法在 com.pevco.persist 包中的所有方法周围实现“after throwing advice ”

@Pointcut("within(com.pevco.persist.Foo.*) || within(com.pevco.persist.Bar.*)")