Discussoes de Programacao e Tecnologia

Exception estranha com vraptor+displaytag[RESOLVIDO]

6 respostas
boneazul
boneazul

Pessoal to com um problema estranho aqui…estou usando a displaytag para exportação de registros mas quando clica no link pra exportar
ele faz tudo corretamente …me da o arquivo sem erro…mas passa essa exception é lançada no console…

é como se a requisicao do vraptor chamasse getOutputStream() depois o displaytag chamasse de novo…ou o contrario a displaytag chama pra exportar depois o vraptor chama de novo…

a url que ele chama é essa…passando os parametros…
http://localhost:8081/contrato/role/list?d-49700-e=5&6578706f7274=1

java.lang.IllegalStateException: getOutputStream() has already been called for this response

alguem ai tem ideia do que poderia ser??

a stack completa

17/05/2010 17:48:40 org.apache.catalina.core.ApplicationDispatcher invoke
SEVERE: Servlet.service() for servlet jsp threw exception
java.lang.IllegalStateException: getOutputStream() has already been called for this response
	at org.apache.catalina.connector.Response.getWriter(Response.java:610)
	at org.apache.catalina.connector.ResponseFacade.getWriter(ResponseFacade.java:198)
	at javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
	at org.apache.jasper.runtime.JspWriterImpl.initOut(JspWriterImpl.java:125)
	at org.apache.jasper.runtime.JspWriterImpl.flushBuffer(JspWriterImpl.java:118)
	at org.apache.jasper.runtime.PageContextImpl.release(PageContextImpl.java:188)
	at org.apache.jasper.runtime.JspFactoryImpl.internalReleasePageContext(JspFactoryImpl.java:118)
	at org.apache.jasper.runtime.JspFactoryImpl.releasePageContext(JspFactoryImpl.java:77)
	at org.apache.jsp.WEB_002dINF.jsp.role.list_jsp._jspService(list_jsp.java:121)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
	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 br.com.caelum.vraptor.core.DefaultStaticContentHandler.deferProcessingToContainer(DefaultStaticContentHandler.java:64)
	at br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:80)
	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.ApplicationDispatcher.invoke(ApplicationDispatcher.java:646)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:436)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
	at br.com.caelum.vraptor.view.DefaultPageResult.forward(DefaultPageResult.java:67)
	at br.com.caelum.vraptor.extra.ForwardToDefaultViewInterceptor.intercept(ForwardToDefaultViewInterceptor.java:59)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:56)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.OutjectResult.intercept(OutjectResult.java:65)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.ExecuteMethodInterceptor.intercept(ExecuteMethodInterceptor.java:75)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:56)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.ParametersInstantiatorInterceptor.intercept(ParametersInstantiatorInterceptor.java:77)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.InstantiateInterceptor.intercept(InstantiateInterceptor.java:42)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.AcessInViewInterceptor.intercept(AcessInViewInterceptor.java:38)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.PaginatorInterceptor.intercept(PaginatorInterceptor.java:40)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.AcessInterceptor.intercept(AcessInterceptor.java:39)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.NoCacheInterceptor.intercept(NoCacheInterceptor.java:35)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.AuthenticationInterceptor.intercept(AuthenticationInterceptor.java:55)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.webtia.contrato.interceptors.ErrorInterceptor.intercept(ErrorInterceptor.java:33)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.util.hibernate.HibernateTransactionInterceptor.intercept(HibernateTransactionInterceptor.java:45)
	at br.com.caelum.vraptor.core.InstantiatedInterceptorHandler.execute(InstantiatedInterceptorHandler.java:47)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.InterceptorListPriorToExecutionExtractor.intercept(InterceptorListPriorToExecutionExtractor.java:46)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.FlashInterceptor.intercept(FlashInterceptor.java:80)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.interceptor.ResourceLookupInterceptor.intercept(ResourceLookupInterceptor.java:67)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:54)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.core.ToInstantiateInterceptorHandler.execute(ToInstantiateInterceptorHandler.java:56)
	at br.com.caelum.vraptor.core.DefaultInterceptorStack.next(DefaultInterceptorStack.java:65)
	at br.com.caelum.vraptor.core.DefaultRequestExecution.execute(DefaultRequestExecution.java:70)
	at br.com.caelum.vraptor.VRaptor$1.insideRequest(VRaptor.java:92)
	at br.com.caelum.vraptor.ioc.spring.SpringProvider.provideForRequest(SpringProvider.java:56)
	at br.com.caelum.vraptor.VRaptor.doFilter(VRaptor.java:89)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
	at java.lang.Thread.run(Unknown Source)
Alura POO: o que é programação orientada a objetos? Aprenda os conceitos básicos da programação orientada a objetos, como classes, objetos, herança, encapsulamento e polimorfismo, com exemplos.

6 Respostas

Lucas_Cavalcanti
Lucas_Cavalcanti

vc faz algo que mexa no response no seu método list?

boneazul
boneazul

Lucas Cavalcanti:
vc faz algo que mexa no response no seu método list?

entao no meu método list não mas eu tenho um interceptor que deixa de fazer cache html de páginas e usa o response …peguei na pagina de contribuições de voces

public class NoCacheInterceptor implements Interceptor {
	private final HttpServletResponse response;

	public NoCacheInterceptor(HttpServletResponse response) {
		this.response = response;
	}

	public boolean accepts(ResourceMethod method) {
		return true;
	}

	public void intercept(InterceptorStack stack, ResourceMethod method,
			Object resourceInstance) throws InterceptionException {
		response.setHeader("Expires", "Wed, 31 Dec 1969 21:00:00 GMT");
		response.setHeader("Cache-Control",
				"no-store, no-cache, must-revalidate");
		response.addHeader("Cache-Control", "post-check=0, pre-check=0");
		response.setHeader("Pragma", "no-cache");
		stack.next(method, resourceInstance);
	}
}

…mas nao chego a chamar um getResponse() no interceptor…alguma ideia??

Lucas_Cavalcanti
Lucas_Cavalcanti

tenta desabilitar esse interceptor e ver se dá o mesmo erro…

boneazul
boneazul

Lucas Cavalcanti:
tenta desabilitar esse interceptor e ver se dá o mesmo erro…

Mesmo retirando o interceptor continua dando o erro…mas encontrei uma pedaço do site falando sobre o assunto…recomendando instalar um filtro…da displaytag pra trabalhar com a exportação coloquei no meu web.xml e funcionou

<filter>
	    <filter-name>ResponseOverrideFilter</filter-name> 
	    <filter-class>org.displaytag.filter.ResponseOverrideFilter</filter-class> 
	</filter>
	
	<filter-mapping> 
	    <filter-name>ResponseOverrideFilter</filter-name> 
	    <url-pattern>/*</url-pattern>
	</filter-mapping>

http://displaytag.sourceforge.net/10/export.html
http://displaytag.sourceforge.net/10/export_filter.html

tem perigo de entrar em conflito com algo do vraptor??

Lucas_Cavalcanti
Lucas_Cavalcanti

não sei… mas vc tem que declarar esse filtro antes do do vraptor, senão ele nem será chamado

boneazul
boneazul

é a aplicação ta normal e o erro parou…acho que nao entrou em conflito em nenhum ponto…pelo que testei…valeu pela atenção…

Criado 17 de maio de 2010
Ultima resposta 19 de mai. de 2010
Respostas 6
Participantes 2

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