[JBoss Seam] - Legacy code: Integrating with existing servlet
by tonylmai
Hi all,
We have a chart library that we use to serve images for our application. To integrate with our Seam app, we wrote a simple servlet that invokes the library and return a URL of the created image. The library requires a datasource and user ID so I use dependency injection. However, during runtime, the injection objects are all null.
Here is the code for the servlet:
public class GetChart extends HttpServlet {
|
| @In("quoteDS")
| private ChartDatasource quoteDS;
|
| @In
| private WcLoginSession wcLoginSession;
|
| protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
| try {
| writeChart(request, response);
| } catch (Exception e) {
| e.printStackTrace();
| }
| }
|
| private void writeChart(HttpServletRequest request, HttpServletResponse response) throws Exception {
| OutputStream out = response.getOutputStream();
| try {
| response.setContentType("img/png");
| ChartCriteria chartCriteria = ChartCriteria.fromRequest(request);
| if (chartCriteria != null) {
| writeChart(out, chartCriteria);
| }
| } finally {
| try {
| out.flush();
| } catch (IOException e) {
| e.printStackTrace();
| }
| out.close();
| }
| }
|
| private void writeChart(OutputStream out, ChartCriteria chartCriteria) {
| Chart chart = new Chart(wcLoginSession.getMyLoginId(), chartCriteria);
| try {
| chart.build(quoteDS, out);
| } catch (Exception e) {
| e.printStackTrace();
| }
| }
| }
|
Why would my injections not working? Is there a better way to do this?
I am running Seam 2.0.0CR2 with JBoss 4.2.1GA.
Thanks in advance for your help.
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18 years, 5 months
[JBoss Seam] - ClassNotFoundException for SeamListener
by yanlong11
Hi
I have trouble getting my own sample to work, it is very simple ear with only one jsp page, but I am trying to include also seam support there, problem is, that I am getting ClassNotFound Exception (full stack trace included below) although RegistrationExample (from seam) works perfectly and my app also seems to work (jsp is displayed) although I would like to get rid of that error message.
I have jboss-seam.jar included in root of the ear file.
thank you for your help.
yanlong
16:47:08,152 ERROR [[/Web]] Error configuring application listener of class org.jboss.seam.servlet.SeamListener
java.lang.ClassNotFoundException: org.jboss.seam.servlet.SeamListener
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1358)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1204)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3799)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4361)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:790)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:770)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:553)
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:585)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.apache.catalina.core.StandardContext.init(StandardContext.java:5312)
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:585)
at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:296)
at org.jboss.mx.server.RawDynamicInvoker.invoke(RawDynamicInvoker.java:164)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.web.tomcat.service.TomcatDeployer.performDeployInternal(TomcatDeployer.java:301)
at org.jboss.web.tomcat.service.TomcatDeployer.performDeploy(TomcatDeployer.java:104)
at org.jboss.web.AbstractWebDeployer.start(AbstractWebDeployer.java:375)
at org.jboss.web.WebModule.startModule(WebModule.java:83)
at org.jboss.web.WebModule.startService(WebModule.java:61)
at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
at $Proxy0.start(Unknown Source)
at org.jboss.system.ServiceController.start(ServiceController.java:417)
at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy53.start(Unknown Source)
at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:466)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:87)
at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
at $Proxy54.start(Unknown Source)
at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
at sun.reflect.GeneratedMethodAccessor29.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at sun.reflect.GeneratedMethodAccessor114.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.jmx.connector.invoker.InvokerAdaptorService.invoke(InvokerAdaptorService.java:266)
at sun.reflect.GeneratedMethodAccessor86.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
at org.jboss.jmx.connector.invoker.SerializableInterceptor.invoke(SerializableInterceptor.java:74)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.invocation.jrmp.server.JRMPProxyFactory.invoke(JRMPProxyFactory.java:179)
at sun.reflect.GeneratedMethodAccessor85.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
at org.jboss.invocation.jrmp.server.JRMPInvoker$MBeanServerAction.invoke(JRMPInvoker.java:818)
at org.jboss.invocation.jrmp.server.JRMPInvoker.invoke(JRMPInvoker.java:419)
at sun.reflect.GeneratedMethodAccessor84.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:294)
at sun.rmi.transport.Transport$1.run(Transport.java:153)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:149)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:595)
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18 years, 5 months
[JBoss Seam] - Re: Component Architecture instead of traditional Layers
by brachie
@Pete: thanks for the answer! :-)
"pete.muir(a)jboss.org" wrote : "brachie" wrote : In my opinion injecting one SFSB into another should be avoided, but maybe I am wrong..
|
| anonymous wrote :
| | Why?
| |
|
I thought it would be a too tight dependency between the SFSB. For instance, if you inject SFSB A into SFSB B and SFSB C and change some business logic in A maybe B or C are broken because they use some methods of A.
anonymous wrote :
|
|
| The following questions are in my mind:
|
| anonymous wrote : Should there be one SFSB for every persistent class of your domain model which acts as a manager and manages the actions connected with the (injected) entity (e.g. SFSB PersonMgr for creating, deleting persons in DB etc)?
|
| This seems reasonable, and is the approach we take with seam-gen (using EntityHome for scaffolding).
|
| anonymous wrote : Or would it be better to have one SFSB component for each page you have in your application, which manages the actions connected to the specific page?
|
| This strikes me as a bad idea and hangover from older design patterns.
|
| anonymous wrote : Or would it be good to have one SFSB per use case of your application?
|
| This is, IMO, another very valid approach. It could easily be combined with your first suggestion (an EntityHome for each entity, a component for a use case can call the EntityHome as necessary).
Ok, so I would have to inject the EntityHome into my SFSB implementing the use case?
Regards,
Alexander
View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4121623#4121623
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18 years, 5 months