Jasper在heroku上的一个jsf应用程序 [英] Jasper on a jsf app in heroku

问题描述

我正在使用jasperreports的应用程序中工作。它使用Primefaces和Mojarra，并部署在Jetty中。当我在本地部署应用程序时，它确实工作正常。但是，当我在heroku中部署时，它不起作用。

当我将它部署到heroku时，我获得：

HTTP ERROR 500

 访问/pages/client.jsf时出现问题。原因：
  

  STREAM由：
  

  java.lang .IllegalStateException：STREAM at 
 org.eclipse.jetty.server.Response.getWriter（Response.java:683）at 
 com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter（ExternalContextImpl.java:723） 
 at 
 com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter（FaceletViewHandlingStrategy.java:930）
 at 
 com.sun.faces.application.view.FaceletViewHandlingStrategy。 renderView（FaceletViewHandlingStrategy.java:376）
 at 
 com.sun.faces.application.view.MultiViewHandler.renderView（MultiViewHandler.java:131）
 at 
 com.sun。 faces.lifecycle.RenderResponsePhase.execute（RenderResponsePhase.java:121）
 at com.sun.faces.lifecycle.Phase.doPhase（Phase.java:101）at 
 com.sun.faces.lifecycle。 Lifecycl eImpl.render（LifecycleImpl.java:139）
位于javax.faces.webapp.FacesServlet.service（FacesServlet.java:594）
 org.eclipse.jetty.servlet.ServletHolder.handle（ServletHolder。 
 at 
 org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1367）
 at 
 org.primefaces.webapp.filter。 FileUploadFilter.doFilter（FileUploadFilter.java:79）
。在
。在
组织org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1338）
。在
处
 org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）
 at 
在
 org.eclipse.jetty.servlet.ServletHandler.doHandle org.eclipse.jetty.servlet.ServletHandler $ CachedChain.doFilter（ServletHandler.java:1338）
（Servle 
 at 
 org.eclipse.jetty.server.handler.ScopedHandler.handle（ScopedHandler.java:119）
 at 
 org.eclipse.jetty。 security.SecurityHandler.handle（SecurityHandler.java:524）
 at 
 org.eclipse.jetty.server.session.SessionHandler.doHandle（SessionHandler.java:231）
 at 
 org.eclipse.jetty.server.handler.ContextHandler.doHandle（ContextHandler.java:1065）
。在
 org.eclipse.jetty.servlet.ServletHandler.doScope（ServletHandler.java:413）
 
 org.eclipse.jetty.server.session.SessionHandler.doScope（SessionHandler.java:192）
 at 
 org.eclipse.jetty.server.handler.ContextHandler.doScope（ContextHandler .java：999）
 at 
 org.eclipse.jetty.server.handler.ScopedHandler.handle（ScopedHandler.java:117）
 at 
 org.eclipse.jetty.server .handler.ContextHandlerCollection.handle（ContextHandlerCollection.java:250）
a吨
 org.eclipse.jetty.server.handler.HandlerCollection.handle（HandlerCollection.java:149）
。在
 org.eclipse.jetty.server.handler.HandlerWrapper.handle（HandlerWrapper。 
 at org.eclipse.jetty.server.Server.handle（Server.java:350）at 
 org.eclipse.jetty.server.AbstractHttpConnection.handleRequest（AbstractHttpConnection.java:454）在
 org.eclipse.jetty.server.AbstractHttpConnection.content 
（AbstractHttpConnection.java:900）
。在
 $ org.eclipse.jetty.server.AbstractHttpConnection RequestHandler.content（ AbstractHttpConnection.java:954）在org.eclipse.jetty.http.HttpParser.parseNext 
（HttpParser.java:851）
。在
 org.eclipse.jetty.http.HttpParser.parseAvailable（ HttpParser.java:235）
 at 
 org.eclipse.jetty.server.AsyncHttpConnection.handle（AsyncHttpConnection.java:77）
 at 
 org.eclipse.jetty.io。 nio.SelectChannelEndPoint.handle（选择ChannelEndPoint.java:620）
 at 
 org.eclipse.jetty.io.nio.SelectChannelEndPoint $ 1.run（SelectChannelEndPoint.java:46）
 at 
 org.eclipse.jetty .util.thread.QueuedThreadPool.runJob（QueuedThreadPool.java:603）
 at 
 org.eclipse.jetty.util.thread.QueuedThreadPool $ 3.run（QueuedThreadPool.java:538）
 at java.lang.Thread.run（Thread.java:744）
  

正如您所看到的，它已被部署使用Jetty。

发送pdf报告的代码是这样的：

  @ManagedBean（name =reportGeneratorMB）
 @RequestScoped 
 public class ReportGeneratorMB {
 public void generateReport（ActionEvent actionEvent）throws ClassNotFoundException，
 SQLException，IOException，JRException {
连接连接; 
 FacesContext facesContext = FacesContext.getCurrentInstance（）; 
 HttpServletResponse response =（HttpServletResponse）facesContext.getExternalContext（）
 .getResponse（）; 
 InputStream reportStream = facesContext.getExternalContext（）。getResourceAsStream（
/resources/reports/index.jasper）; 
 ServletOutputStream servletOutputStream = response.getOutputStream（）; 
 Class.forName（org.postgresql.Driver）; 
 connection = DriverManager.getConnection（jdbc：postgresql：// localhost：5432 / sid，sid，
sid）; 
 facesContext.getExternalContext（）。setResponseContentType（application / pdf）; 
 response.setContentType（application / pdf）; 
 JasperRunManager.runReportToPdfStream（reportStream，servletOutputStream，new HashMap（），
 connection）; 
 connection.close（）; 
 servletOutputStream.flush（）; 
 servletOutputStream.close（）; 
 facesContext.responseComplete（）; 
} 
} 
  

而在c.xhtml中：

  ... 
 < p：commandButton value =Generate Reportid =generate_report
 actionListener =＃{reportGeneratorMB.generateReport} ajax =false/> 
< / form> 
 ... 
  

我搜索过的东西还没有找到可以帮助我，因为它在本地工作，所以我不知道我能做什么。我不确定这些数据是否足够，但如果不是，我会很感激你告诉我需要提供哪些信息以获得一些帮助。

在此先感谢，

Juan G
<解决方案

错误...

  java.lang.IllegalStateException ：STREAM at 
 org.eclipse.jetty.server.Response.getWriter（Response.java:683）at 
  

...表示您访问 ServletResponse.getWriter（） 失败在您的应用程序中使用其他内容之前已访问 ServletResponse.getOutputStream（） 。这是不允许的每个servlet规范。您可以使用Writer或OutputStream作为响应，但不能同时使用两者。有关 IllegalStateException 的两种方法，请参阅javadoc。

I am working in an application that uses jasperreports. It uses Primefaces with Mojarra, and is deployed in Jetty. When I deploy the app locally, it does work ok. But when I deploy in heroku it is not working.

When I deploy it to heroku I obtain:

HTTP ERROR 500

 Problem accessing /pages/client.jsf. Reason:

  STREAM Caused by:

 java.lang.IllegalStateException: STREAM    at
     org.eclipse.jetty.server.Response.getWriter(Response.java:683)     at
     com.sun.faces.context.ExternalContextImpl.getResponseOutputWriter(ExternalContextImpl.java:723)
        at
     com.sun.faces.application.view.FaceletViewHandlingStrategy.createResponseWriter(FaceletViewHandlingStrategy.java:930)
        at
     com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:376)
        at
     com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
        at
     com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)    at
     com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)   at
     org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:598)
        at
     org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1367)
        at
     org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:79)
        at
     org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1338)
        at
     org.springframework.orm.jpa.support.OpenEntityManagerInViewFilter.doFilterInternal(OpenEntityManagerInViewFilter.java:180)
        at
     org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at
     org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1338)
        at
     org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:484)
        at
     org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)
        at
     org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:524)
        at
     org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:231)
        at
     org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1065)
        at
     org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:413)
        at
     org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:192)
        at
     org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:999)
        at
     org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
        at
     org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:250)
        at
     org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:149)
        at
     org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:111)
        at org.eclipse.jetty.server.Server.handle(Server.java:350)  at
     org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:454)
        at
     org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:900)
        at
     org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:954)
        at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:851)
        at
     org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
        at
     org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:77)
        at
     org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:620)
        at
     org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:46)
        at
     org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:603)
        at
     org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:538)
        at java.lang.Thread.run(Thread.java:744)

As you can see it is deployed using Jetty.

The code that sends the pdf report is this:

@ManagedBean(name="reportGeneratorMB")
@RequestScoped
public class ReportGeneratorMB {
    public void generateReport(ActionEvent actionEvent) throws ClassNotFoundException,
            SQLException, IOException, JRException {
        Connection connection;
        FacesContext facesContext = FacesContext.getCurrentInstance();
        HttpServletResponse response = (HttpServletResponse) facesContext.getExternalContext()
                .getResponse();
        InputStream reportStream = facesContext.getExternalContext().getResourceAsStream(
                "/resources/reports/index.jasper");
        ServletOutputStream servletOutputStream = response.getOutputStream();
        Class.forName("org.postgresql.Driver");
        connection = DriverManager.getConnection("jdbc:postgresql://localhost:5432/sid", "sid", 
                "sid");
        facesContext.getExternalContext().setResponseContentType("application/pdf");
        response.setContentType("application/pdf");
        JasperRunManager.runReportToPdfStream(reportStream, servletOutputStream, new HashMap(),
                connection);
        connection.close();
        servletOutputStream.flush();
        servletOutputStream.close();
        facesContext.responseComplete();
    }
}

And in the c.xhtml:

...
<h:form id="reportForm">
    <p:commandButton value="Generate Report" id="generate_report"
            actionListener="#{reportGeneratorMB.generateReport} ajax="false"/>
</form>
...

I've searched by I still haven't found a thing that can help me, and since it is working locally I do not know what can I do. I am not sure if this data is enough, but if it isn't I'll be grateful if you tell me what information I need to provide to get some help.

Thanks in advance,

Juan G

解决方案

The error ...

java.lang.IllegalStateException: STREAM at
   org.eclipse.jetty.server.Response.getWriter(Response.java:683) at 

... means that your access to ServletResponse.getWriter() failed because something else in your application has previously accessed ServletResponse.getOutputStream(). That is not allowed per the servlet spec. You can either use a Writer or an OutputStream for your response, but not both. See javadoc on both of those methods for IllegalStateException.

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