Olá a todos.
Estou com um erro de referência circular na minha aplicação. Este erro acontece quando um Bean estancia o outro, por exemplo:
public class BeanA {
private BeanB b;
//Obs: Tirei a configuração a inicialização do objeto do construtor
// e deixando somente no método setBeanB. Teoricamente isso deveria
// resolver, mas não adiantou.
public BeanA() {
}
public void setBeanB(BeanB b) {
this.b = b;
}
// A classe continua........
public class BeanB {
private BeanA a;
public BeanB() {}
public void setBeanA(BeanA a) {
this.a = a;
}
// A classe continua...No meu caso qui é um pouco diferente, pois estou utilizando Hibernate para a persistência dos dados. A referência circular gerada pelo Spring ocorre quando possuo um relacionamento ManyToMany entre os Beans. Este é um trecho de código das minhas duas classes, Aluno e Responsavel.
Classe Aluno
@Scope("prototype")
@Component(value = "aluno")
@Entity
@Table(name = "ALUNO")
public class Aluno implements java.io.Serializable {
private static final long serialVersionUID = 1L;
// Mapeamento do Hibernate para o relacionamento
@ManyToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY)
@JoinTable(name = "RESPONSAVELALUNO", joinColumns = @JoinColumn(name = "IDALUNO"),
inverseJoinColumns = @JoinColumn(name = "IDRESPONSAVEL"))
private Collection<Responsavel> responsaveis;
public Aluno() {
}
public Collection<Responsavel> getResponsaveis() {
return responsaveis;
}
public void setResponsavel(Collection<Responsavel> responsaveis) {
this.responsaveis = responsaveis;
}Classe Responsavel
@Scope("prototype")
@Component(value = "responsavel")
@Entity
@Table(name = "RESPONSAVEL")
public class Responsavel implements java.io.Serializable {
private static final long serialVersionUID = 1L;
// Mapeamento Hibernate para o Relacionamento
@ManyToMany(cascade = CascadeType.PERSIST, fetch = FetchType.LAZY)
@JoinTable(name = "RESPONSAVELALUNO", joinColumns = @JoinColumn(name = "IDRESPONSAVEL"),
inverseJoinColumns = @JoinColumn(name = "IDALUNO"))
private Collection<Aluno> aluno;
public Responsavel() {
}
public Collection<Aluno> getAluno() {
return aluno;
}
public void setAluno(Collection<Aluno> aluno) {
this.aluno = aluno;
}O erro somente ocorre quando tento salvar um Aluno ou salvar um Responsável através do Spring com o Hibernate. Vai o código do erro quando tentei salvar um Responsável:
17/02/2009 09:49:28 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet default threw exception
org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'responsavel': Requested bean is currently in creation: Is there an unresolvable circular reference?
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:224)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByName(AbstractAutowireCapableBeanFactory.java:1029)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:977)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:283)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireByName(AbstractAutowireCapableBeanFactory.java:1029)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:977)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:472)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory$1.run(AbstractAutowireCapableBeanFactory.java:409)
at java.security.AccessController.doPrivileged(Native Method)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:380)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:283)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:185)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:164)
at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:881)
at com.lpinformatica.wframe.web.action.TableInterceptor.intercept(TableInterceptor.java:166)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:224)
at com.opensymphony.xwork2.DefaultActionInvocation$2.doProfiling(DefaultActionInvocation.java:223)
at com.opensymphony.xwork2.util.profiling.UtilTimerStack.profile(UtilTimerStack.java:455)
at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:221)
at org.apache.struts2.impl.StrutsActionProxy.execute(StrutsActionProxy.java:50)
at org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:504)
at org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:419)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
at org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Thread.java:619)Pelo que percebi o diferencial é que estou referenciando os objetos utilizando Collection justamente pelo relacionamento ManyToMany do Hibernate. Pesquisei bastante mas não encontrei nada.
Se alguém puder me ajudar agradeço muito…
Abraço…