Wie kann ConcurrentModificationException beim Aktualisieren von untergeordneten Elementen gelöst werden?

Ich habe eine Contract Entität, die ein Attribut hat wie folgt angegeben:Wie kann ConcurrentModificationException beim Aktualisieren von untergeordneten Elementen gelöst werden?

@OneToMany(fetch = FetchType.EAGER, mappedBy = "contract") 
@Fetch(FetchMode.SELECT) 
private List<ContractDetail> details;

Die Details Unternehmen folgende Zuordnungen hat:

@ManyToOne 
@JoinColumn(name = "idContrato") 
private Contract contract; 

@ManyToOne 
@JoinColumn(name = "idParametroContrato") 
private ContractCoverParameter coverParameter;

Die Idee dabei ist, wenn ein ContractCoverParameter Entität erstellt wird, ein ContractDetail ist erstellt für alle Contract s durch Aufruf der updateContractDetailList() Methode transkribiert unten.

public void updateContractDetailList() { 
    List<ContractDetail> details = new ArrayList<ContractDetail>(); 

    for (Contract contract : contractService.findAll()) { 

     details = contract.getDetails(); 

     if (contract.getDetails() != null || contract.getDetails().size() != 0) { 

      for (ContractCoverParameter coverParameter : findAll()) { 

       ContractDetail cDetail = new ContractDetail(); 
       cDetail.setContract(contract); 
       cDetail.setCoverParameter(coverParameter); 
       cDetail.setValue(""); 

       cDetail = contractDetailService.saveContractDetail(cDetail); 

       details.add(cDetail); 
       contract.setDetails(details); 
      } 
      contractService.updateContract(contract); 
     } 
    } 
}

Die contractDetailService.saveContractDetail(ContractDetail cDetail) Methode ruft schließlich die folgende Methode:

protected T persistT(T entity) { 
    getSession().persist(entity); 
    flush(); 
    return entity; 
}

Und die contractService.updateContract(Contract contract) ruft die folgende Methode:

public void saveOrUpdate(T entity) { 
    try { 
     clear(); 
     getSession().saveOrUpdate(entity); 
     flush(); 
     getSession().beginTransaction().commit(); 
     getSession().close(); 
    } catch (Exception e) { 
     e.printStackTrace(); 
    } finally { 
     if (getSession().getTransaction() == null) { 
      rollback(); 
     } 
    } 
}

EDIT wie auf Kommentare angefordert:

public List<T> findAll() { 
    return getSession().createCriteria(persistentClass).list(); 
}

Ich habe zwei ContractCoverParameter Objekte auf der Datenbank beibehalten, aber wenn ich versuche, die Detailliste zu aktualisieren, erhalte ich die folgende Stacktrace:

Oct 19, 2016 2:49:34 PM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [/hrm] threw exception [Request processing failed; nested exception is java.util.ConcurrentModificationException] with root cause 
java.util.ConcurrentModificationException 
    at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901) 
    at java.util.ArrayList$Itr.next(ArrayList.java:851) 
    at org.hibernate.collection.internal.AbstractPersistentCollection$IteratorProxy.next(AbstractPersistentCollection.java:789) 
    at br.com.mentium.hrm.service.impl.ContractCoverParameterServiceImpl.updateContractDetailList(ContractCoverParameterServiceImpl.java:128) 
    at sun.reflect.GeneratedMethodAccessor358.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) 
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:280) 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) 
    at com.sun.proxy.$Proxy75.updateContractDetailList(Unknown Source) 
    at br.com.mentium.hrm.service.impl.ContractServiceImpl.updateContractDetailList(ContractServiceImpl.java:769) 
    at sun.reflect.GeneratedMethodAccessor357.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:333) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157) 
    at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:99) 
    at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:280) 
    at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96) 
    at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) 
    at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213) 
    at com.sun.proxy.$Proxy68.updateContractDetailList(Unknown Source) 
    at br.com.mentium.hrm.controller.ContractController.listCoverParameters(ContractController.java:432) 
    at sun.reflect.GeneratedMethodAccessor353.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) 
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) 
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) 
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) 
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) 
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) 
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) 
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) 
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) 
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:317) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:127) 
    at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:91) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:115) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.authentication.rememberme.RememberMeAuthenticationFilter.doFilter(RememberMeAuthenticationFilter.java:158) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:169) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.session.ConcurrentSessionFilter.doFilter(ConcurrentSessionFilter.java:134) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:200) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:121) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:100) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at br.com.mentium.hrm.configuration.CharacterEncodingFilter.doFilter(CharacterEncodingFilter.java:25) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:66) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) 
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) 
    at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:331) 
    at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:214) 
    at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177) 
    at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346) 
    at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:262) 
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) 
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) 
    at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:106) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1099) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:670) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:745)

Was hier vor sich geht und wie diese zu lösen?

Quelle

2016-10-19 gtludwig

Bitte markieren 'br.com.mentium.hrm.service.impl.ContractCoverParameterServiceImpl.updateContractDetailList (ContractCoverParameterServiceImpl.java:128)' im Quellcode. – talex

Stellen Sie 'findAll()' Code bereit. – talex

'updateContract DetailList()' ist die in der Frage gezeigte Methode. 'findAll() 'wurde bereitgestellt. – gtludwig

Versuchen Sie, die findAll() s außerhalb der Schleife zu bewegen.

public void updateContractDetailList() { 
    List<ContractDetail> details = new ArrayList<ContractDetail>(); 
    List<Contract> contracts = contractService.findAll(); 
    List<ContractCoverParameter> contractCoverParams = findAll(); 

    for (Contract contract : contracts) { 

     details = contract.getDetails(); 

     if (contract.getDetails() != null || contract.getDetails().size() != 0) { 

      for (ContractCoverParameter coverParameter : contractCoverParams) { 

       ContractDetail cDetail = new ContractDetail(); 
       cDetail.setContract(contract); 
       cDetail.setCoverParameter(coverParameter); 
       cDetail.setValue(""); 

       cDetail = contractDetailService.saveContractDetail(cDetail); 

       details.add(cDetail); 
       contract.setDetails(details); 
      } 
      contractService.updateContract(contract); 
     } 
    } 
}

Quelle

2016-10-19 17:49:45 boring

danke, Kumpel! Es hat funktioniert. Das Einzige, was nicht perfekt ist, ist, dass ich jetzt eine 'org.hibernate.TransactionException: verschachtelte Transaktionen nicht unterstützt 'bekomme. Das passiert jetzt schon eine Weile und ich habe es immer noch nicht herausgefunden. – gtludwig

Wie kann ConcurrentModificationException beim Aktualisieren von untergeordneten Elementen gelöst werden?

Antwort

Verwandte Themen