I’m working on an application to manage database updates within a Java Spring project using the Liquibase 4.21.1 package.
As part of the project I need to implement high-quality audit logging of database updates so that I can notify users of errors or skipped updates that require manual intervention. To this end I’m attempting to implement a custom Change Listener by extending the AbstractChangeExecListener. However, when I attempt to apply my class to the Liquibase object using the setChangeExecListener method I get the following exception when I attempt to run the liquibase.update() method:
liquibase.exception.CommandExecutionException: java.lang.ClassCastException: class com.sherpaerp.dbmigrator.component.SherpaChangeExecListener cannot be cast to class liquibase.changelog.visitor.DefaultChangeExecListener (com.sherpaerp.dbmigrator.component.SherpaChangeExecListener and liquibase.changelog.visitor.DefaultChangeExecListener are in unnamed module of loader 'app')
at liquibase.command.CommandScope.execute(CommandScope.java:235)
at liquibase.Liquibase.lambda$update$1(Liquibase.java:425)
at liquibase.Scope.lambda$child$0(Scope.java:194)
at liquibase.Scope.child(Scope.java:203)
at liquibase.Scope.child(Scope.java:193)
at liquibase.Scope.child(Scope.java:172)
at liquibase.Liquibase.runInScope(Liquibase.java:1618)
at liquibase.Liquibase.update(Liquibase.java:416)
at liquibase.Liquibase.update(Liquibase.java:411)
at liquibase.Liquibase.update(Liquibase.java:407)
at liquibase.Liquibase.update(Liquibase.java:403)
at com.sherpaerp.dbmigrator.services.DatabaseUpdaterService.updateDatabase(DatabaseUpdaterService.java:88)
at com.sherpaerp.dbmigrator.controllers.DatabaseUpdateController.migrateDatabaseUnencrypted(DatabaseUpdateController.java:44)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:681)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at com.sherpaerp.dbmigrator.component.MDCFilter.doFilter(MDCFilter.java:40)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201)
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191)
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)\r\nCaused by: java.lang.ClassCastException: class com.sherpaerp.dbmigrator.component.SherpaChangeExecListener cannot be cast to class liquibase.changelog.visitor.DefaultChangeExecListener (com.sherpaerp.dbmigrator.component.SherpaChangeExecListener and liquibase.changelog.visitor.DefaultChangeExecListener are in unnamed module of loader 'app')
at liquibase.command.core.AbstractUpdateCommandStep.run(AbstractUpdateCommandStep.java:71)
at liquibase.command.core.UpdateSqlCommandStep.run(UpdateSqlCommandStep.java:60)
at liquibase.command.CommandScope.execute(CommandScope.java:212)
... 65 common frames omitted
If instead of extending the AbstractChangeExecListener I extend DefaultChangeExecListener the update method executes correctly, but none of the overriden methods in my custom class are triggered. At this point in development all I have is print statements in each method that should run before calling the super method eg.
@Override
public void ran(ChangeSet changeSet, DatabaseChangeLog databaseChangeLog, Database database, ExecType execType) {
// TODO Auto-generated method stub
System.out.println("SherpaChangeExecListener:: ran");
super.ran(changeSet, databaseChangeLog, database, execType);
}
What am I missing in my implementation?