Problema ao gerar list como resposta em um web service

This message was edited 1 time. Last update was at 03/09/2009 20:58:33

Estou usando a jsr 311 para gerar web services, sendo que quando eu retorno uma collection dentro de um obieto recebo este erro.

java.io.IOException: Error marshalling JAXB object of type "class java.util.ArrayList".
        at com.sun.jersey.core.provider.jaxb.AbstractListElementProvider.writeTo(AbstractListElementProvider.java:146)
        at com.sun.jersey.spi.container.ContainerResponse.write(ContainerResponse.java:254)
        at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:724)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:647)
        at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:638)
        at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:309)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:425)
        at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:590)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:112)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:76)
        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)
Caused by: javax.xml.bind.MarshalException
 - with linked exception:
[com.sun.istack.internal.SAXException2: A cycle is detected in the object graph. This will cause infinitely deep XML: br.com.control.bean.Application[idApplication=5] -> br.com.control.bean.ManagerMessage[idManagerMessage=114] -> br.com.control.bean.Application[idApplication=5]]
        at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:304)
        at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:230)
        at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:75)
        at com.sun.jersey.core.impl.provider.entity.XMLListElementProvider.writeList(XMLListElementProvider.java:130)
        at com.sun.jersey.core.provider.jaxb.AbstractListElementProvider.writeTo(AbstractListElementProvider.java:144)
        ... 24 more
Caused by: com.sun.istack.internal.SAXException2: A cycle is detected in the object graph. This will cause infinitely deep XML: br.com.control.bean.Application[idApplication=5] -> br.com.control.bean.ManagerMessage[idManagerMessage=114] -> br.com.control.bean.Application[idApplication=5]
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.reportError(XMLSerializer.java:226)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.pushObject(XMLSerializer.java:515)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:609)
        at com.sun.xml.internal.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:113)
        at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:663)
        at com.sun.xml.internal.bind.v2.runtime.property.ArrayElementNodeProperty.serializeItem(ArrayElementNodeProperty.java:29)
        at com.sun.xml.internal.bind.v2.runtime.property.ArrayElementProperty.serializeListBody(ArrayElementProperty.java:132)
        at com.sun.xml.internal.bind.v2.runtime.property.ArrayERProperty.serializeBody(ArrayERProperty.java:116)
        at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsXsiType(XMLSerializer.java:663)
        at com.sun.xml.internal.bind.v2.runtime.property.SingleElementNodeProperty.serializeBody(SingleElementNodeProperty.java:113)
        at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeBody(ClassBeanInfoImpl.java:286)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsSoleContent(XMLSerializer.java:571)
        at com.sun.xml.internal.bind.v2.runtime.ClassBeanInfoImpl.serializeRoot(ClassBeanInfoImpl.java:276)
        at com.sun.xml.internal.bind.v2.runtime.XMLSerializer.childAsRoot(XMLSerializer.java:472)
        at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:301)

Como fazer para ele não entrar em loop infinito?

Virtual Machine Man Membro desde: 26/04/2007 14:32:30 Mensagens: 586 Offline

Esqueci de postar a parte do código que gera este erro:

man tu ta utilizando Jersey com Jpa/Hibernate? COmo vc configurou para acessar o banco e fazer uma consulta simples?

Virtual Machine Man Membro desde: 26/04/2007 14:32:30 Mensagens: 586 Offline

A conexão com o banco quem faz é o tomcat, e a JPA só pede a conexão para ele. Ou seja, você tem que configurar o datasource do tomcat no arquivo persistence.xml.
Abaixo segue a propriedade que você tem que colocar no seu persistence.xml:

vc manja de Glassfish?

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="1.0"
	xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
		http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd">
	<persistence-unit name="citespace-jpa" >
		<provider>org.hibernate.ejb.HibernatePersistence</provider>
		<jta-data-source>jdbc/citespace-jpaDS</jta-data-source>
		<class>com.citespace.citespacerest.Test</class>
		<properties>
         <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5InnoDBDialect"/>
         <property name="hibernate.hbm2ddl.auto" value="update"/>
         <property name="hibernate.show_sql" value="true"/>
         <property name="hibernate.format_sql" value="true"/>         
         <property name="hibernate.connection.characterEncoding" value="UTF-8"/>
         <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>        
         <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
		 <property name="hibernate.connection.url" value="jdbc:mysql://localhost/DB"/>
		 <property name="hibernate.connection.username" value="4545"/>
		 <property name="hibernate.connection.password" value="21231"/>
		</properties>
	</persistence-unit>
</persistence>

to com isso ae e pegando um maldito errro

javax.persistence.PersistenceException: No Persistence provider for EntityManager named citespace-jpa: Provider named org.hibernate.ejb.HibernatePersistence threw unexpected exception at create EntityManagerFactory: 
java.lang.NoClassDefFoundError
java.lang.NoClassDefFoundError: Could not initialize class org.hibernate.ejb.Ejb3Configuration
	at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:124)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:110)
	at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:83)
	at com.citespace.citespacerest.Test.getIt(Test.java:29)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$TypeOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:156)
	at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:67)
	at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:208)
	at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:75)
	at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:115)
	at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:67)
	at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:746)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:711)
	at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:702)
	at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:340)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:452)
	at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:633)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	at org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:427)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:315)
	at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:287)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:218)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
	at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:94)
	at com.sun.enterprise.web.PESessionLockingStandardPipeline.invoke(PESessionLockingStandardPipeline.java:98)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:222)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:166)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:648)
	at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:593)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:587)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:1096)
	at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:288)
	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.invokeAdapter(DefaultProcessorTask.java:647)
	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.doProcess(DefaultProcessorTask.java:579)
	at com.sun.enterprise.web.connector.grizzly.DefaultProcessorTask.process(DefaultProcessorTask.java:831)
	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.executeProcessorTask(DefaultReadTask.java:341)
	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:263)
	at com.sun.enterprise.web.connector.grizzly.DefaultReadTask.doTask(DefaultReadTask.java:214)
	at com.sun.enterprise.web.portunif.PortUnificationPipeline$PUTask.doTask(PortUnificationPipeline.java:380)
	at com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:265)
	at com.sun.enterprise.web.connector.grizzly.ssl.SSLWorkerThread.run(SSLWorkerThread.java:106)

The following providers:
oracle.toplink.essentials.PersistenceProvider
oracle.toplink.essentials.ejb.cmp3.EntityManagerFactoryProvider
Returned null to createEntityManagerFactory.

pode me dar um help?

Notícias, artigos e o maior fórum brasileiro sobre Java