Erro ao utilizar DocumentStore no Seam

Front-end
#1

Pessoal,
Estou com dificuldades em utilizar o DocumentStore no Seam.
Tenho um documento PDF salvo no banco e gostaria de disponibilizá-lo para download.

Então fiz o seguinte código

[code]Name(“publicacaoHome”)
@Import(“org.jboss.seam.pdf”)
public class PublicacaoHome extends EntityHome
{
/**
*
*/
private static final long serialVersionUID = -2796591351249381310L;

@RequestParameter Long publicacaoId;

@In
private Identity identity;

@In
private DocumentStore documentStore;

@In
private Manager manager;

@In
private FacesContext facesContext;

@In(create=true) @Out(required=false)
private PublicacaoList publicacaoList;

@Override
public Object getId()
{
    if (publicacaoId == null)
    {
        return super.getId();
    }
    else
    {
        return publicacaoId;
    }
}

@Override @Begin
public void create() {
    super.create();
    
    super.create();

    ValueExpression createdMessage = createValueExpression("#{messages['publicacao.action.salvar.mensagem']}");
	setCreatedMessage(createdMessage);
    
	ValueExpression updatedMessage = createValueExpression("#{messages['publicacao.action.alterar.mensagem']}");
	setUpdatedMessage(updatedMessage);
	
	ValueExpression deletedMessage = createValueExpression("#{messages['publicacao.action.excluir.mensagem']}");
	setDeletedMessage(deletedMessage);
}

public void downloadArquivo() {
	try {
		byte[] conteudo = getInstance().getConteudo();
    	DocumentData data = new DocumentData(getInstance().getNome(), new DocumentData.DocumentType("pdf", "application/pdf"), conteudo);
    	String docId = documentStore.newId();
    	documentStore.saveData(docId, data);
    	String documentUrl = documentStore.preferredUrlForContent(data.getBaseName(), data.getDocumentType().getExtension(), docId);
		facesContext.getExternalContext().redirect(manager.encodeConversationId(documentUrl, facesContext.getViewRoot().getViewId()));
	} catch (IOException e) {
		throw new RedirectException(e);
	}
}

}[/code]

Coloquei também por precaução este conteúdo no web.xml

<servlet> <servlet-name>Document Store Servlet</servlet-name> <servlet-class>org.jboss.seam.document.DocumentStoreServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>Document Store Servlet</servlet-name> <url-pattern>*.pdf</url-pattern> </servlet-mapping>

Só que esta sendo lançada a seguinte exceção:

org.jboss.seam.InstantiationException: Could not instantiate Seam component: publicacaoHome
        at org.jboss.seam.Component.newInstance(Component.java:2106)
        at org.jboss.seam.Component.getInstance(Component.java:1988)
        at org.jboss.seam.Component.getInstance(Component.java:1950)
        at org.jboss.seam.Component.getInstance(Component.java:1944)
        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
        at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
        at org.jboss.seam.el.SeamELResolver.resolveBase(SeamELResolver.java:166)
        at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:53)
        at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
        at com.sun.faces.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:72)
        at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
        at org.jboss.el.parser.AstValue.getValue(AstValue.java:63)
        at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
        at com.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:71)
        at javax.faces.component.UIComponentBase.isRendered(UIComponentBase.java:390)
        at org.richfaces.component.DataIterator.nextColumn(DataIterator.java:27)
        at org.richfaces.component.ColumnsIterator.next(ColumnsIterator.java:40)
        at org.richfaces.component.ColumnsIterator.next(ColumnsIterator.java:14)
        at org.ajax4jsf.component.UIDataAdaptor.saveChildState(UIDataAdaptor.java:892)
        at org.ajax4jsf.component.UIDataAdaptor.setRowKey(UIDataAdaptor.java:345)
        at org.richfaces.renderkit.AbstractTableRenderer.encodeTableStructure(AbstractTableRenderer.java:121)
        at org.richfaces.renderkit.html.DataTableRenderer.doEncodeBegin(DataTableRenderer.java:206)
        at org.richfaces.renderkit.html.DataTableRenderer.doEncodeBegin(DataTableRenderer.java:194)
        at org.ajax4jsf.renderkit.RendererBase.encodeBegin(RendererBase.java:101)
        at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:813)
        at javax.faces.component.UIData.encodeBegin(UIData.java:962)
        at org.ajax4jsf.component.UIDataAdaptor.encodeBegin(UIDataAdaptor.java:1220)
        at org.ajax4jsf.renderkit.RendererBase.renderChild(RendererBase.java:280)
        at org.ajax4jsf.renderkit.RendererBase.renderChildren(RendererBase.java:262)
        at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:220)
        at org.richfaces.renderkit.html.PanelRenderer.doEncodeChildren(PanelRenderer.java:215)
        at org.ajax4jsf.renderkit.RendererBase.encodeChildren(RendererBase.java:121)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
        at javax.faces.render.Renderer.encodeChildren(Renderer.java:148)
        at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:837)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:930)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:933)
        at com.sun.facelets.FaceletViewHandler.renderView(FaceletViewHandler.java:592)
        at org.ajax4jsf.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:108)
        at org.ajax4jsf.application.AjaxViewHandler.renderView(AjaxViewHandler.java:196)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:110)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:100)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:266)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
        at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.MultipartFilter.doFilter(MultipartFilter.java:90)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.ExceptionFilter.doFilter(ExceptionFilter.java:64)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.RedirectFilter.doFilter(RedirectFilter.java:45)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.ajax4jsf.webapp.BaseXMLFilter.doXmlFilter(BaseXMLFilter.java:177)
        at org.ajax4jsf.webapp.BaseFilter.handleRequest(BaseFilter.java:267)
        at org.ajax4jsf.webapp.BaseFilter.processUploadsAndHandleRequest(BaseFilter.java:380)
        at org.ajax4jsf.webapp.BaseFilter.doFilter(BaseFilter.java:507)
        at org.jboss.seam.web.Ajax4jsfFilter.doFilter(Ajax4jsfFilter.java:56)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.LoggingFilter.doFilter(LoggingFilter.java:58)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.web.HotDeployFilter.doFilter(HotDeployFilter.java:53)
        at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)
        at org.jboss.seam.servlet.SeamFilter.doFilter(SeamFilter.java:158)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
        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:235)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
        at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
        at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
        at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:828)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:601)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)
Caused by: org.jboss.seam.RequiredException: @In attribute requires non-null value: publicacaoHome.documentStore
        at org.jboss.seam.Component.getValueToInject(Component.java:2297)
        at org.jboss.seam.Component.injectAttributes(Component.java:1703)
        at org.jboss.seam.Component.inject(Component.java:1521)
        at org.jboss.seam.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:61)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.ConversationInterceptor.aroundInvoke(ConversationInterceptor.java:56)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.transaction.TransactionInterceptor$1.work(TransactionInterceptor.java:95)
        at org.jboss.seam.util.Work.workInTransaction(Work.java:47)
        at org.jboss.seam.transaction.TransactionInterceptor.aroundInvoke(TransactionInterceptor.java:89)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.core.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:44)
        at org.jboss.seam.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:68)
        at org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:107)
        at org.jboss.seam.intercept.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:185)
        at org.jboss.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:103)
        at br.ufrj.cos.portalfees.session.publicacao.PublicacaoHome_$$_javassist_2.create(PublicacaoHome_$$_javassist_2.java)
        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 org.jboss.seam.util.Reflections.invoke(Reflections.java:22)
        at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:144)
        at org.jboss.seam.Component.callComponentMethod(Component.java:2211)
        at org.jboss.seam.Component.callCreateMethod(Component.java:2134)
        at org.jboss.seam.Component.newInstance(Component.java:2094)
        ... 87 more

Por que o DocumentStore está vindo nulo?
Se eu colocar o @In(create=true) também não funciona.

Abraços!

#2

Ao invés de utilizar

@In DocumentStore documentStore

Peguei a instância do objeto dentro do método de download e passou a funcionar!

public void downloadArquivo() { try { byte[] conteudo = getInstance().getConteudo(); DocumentData data = new DocumentData(getInstance().getNome(), new DocumentData.DocumentType("pdf", "application/pdf"), conteudo); DocumentStore documentStore = DocumentStore.instance(); String docId = documentStore.newId(); documentStore.saveData(docId, data); String documentUrl = documentStore.preferredUrlForContent(data.getBaseName(), data.getDocumentType().getExtension(), docId); facesContext.getExternalContext().redirect(manager.encodeConversationId(documentUrl, facesContext.getViewRoot().getViewId())); } catch (IOException e) { throw new RedirectException(e); } }

Abraço!

#3

Rafael,

Qual versão do Seam vc está usando?

A minha classe do seam DocumentData é abstrata, não dá instanciar o objeto igual no seu codigo: DocumentData data = new DocumentData(reportId, new DocumentData.DocumentType(“pdf”, “application/pdf”), output.toByteArray());

Vlw!

#4

Olá…
quando estava com esta dúvida utilizava a versão 2.1.1.CR2

Na época resolvi o problema da seguinte forma

DocumentType documentType = new DocumentType(extensao, publicacao.getContentType()); DocumentData data = new DocumentData(publicacao.getFileName(), documentType, conteudo); DocumentStore documentStore = DocumentStore.instance(); String docId = documentStore.newId(); documentStore.saveData(docId, data); String documentUrl = documentStore.preferredUrlForContent(data.getBaseName(), data.getDocumentType().getExtension(), docId); facesContext.getExternalContext().redirect(manager.encodeConversationId(documentUrl, facesContext.getViewRoot().getViewId()));
Com isso eu retirei o código

@In DocumentStore documentStore

Eu vi na documentação do Seam 2.2.0.GA que existe uma nova tag para download

<s:download src="/resources.xhtml"> <f:param name="fileId" value="#{someBean.downloadableFileId}"/> </s:download>

Pode ser que resolva o problema!

abraço!

#5