[EJB 3.0] - is mappedName needed to reference an EJB in JSF or not?
by anthon.r
JBoss 5.0.0.GA
Hi,
I'm exhausted searching for some enlightenment on whether the attribute "mappedName" in @EJB is needed or not in a JSF Managed Beans. Could please anyone enlighten me on this subject? I'm getting error message like "Resolution should not happen via injection container" if I don't specify mappedName. I want to avoid mappedName as much as possible. Or is it unavoidable?
Also, what's the difference between applying @EJB to field from applying to a class? Consider the following example:
@Stateless
| @EJB(name="audit", beanInterface=AuditLocal.class)
| public class MyBean implements MyBeanRemote, MyBeanLocal {
|
| SessionContext context;
| AuditLocal audit;
|
| public void setSessionContext(SessionContext context) {
| this.context = context;
| }
|
| @PostConstruct
| public void init() {
| audit = (AuditLocal) context.lookup("audit");
| }
| // ...
| }
My guess is, if @EJB is declared at the class level, the container tries to inject the session bean into java:/comp/env/audit JNDI name instead of injecting it to the field directly as opposed to @EJB that is declared at the field level. Did I get it right?
And it knows what EJB to inject in java:/comp/env/audit by relying on the value of beanInterface attribute, is that right?
Thanks
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17 years, 1 month
[Tomcat, HTTPD, Servlets & JSP] - Re: servlet init hangs reading /WEB-INF/web.xml 5.0.1
by mlybarger
ok, finally an exception was thrown. here's the stack
| 07:49:36,529 INFO [TestServlet] start - init()
| 08:01:21,136 WARN [ClassLoaderManager] Unexpected error during load of:org.xml.sax.XMLReader
| java.lang.OutOfMemoryError: Java heap space
| at java.util.zip.InflaterInputStream.<init>(InflaterInputStream.java:71)
| at java.util.zip.ZipFile$1.<init>(ZipFile.java:212)
| at java.util.zip.ZipFile.getInputStream(ZipFile.java:212)
| at java.util.zip.ZipFile.getInputStream(ZipFile.java:180)
| at org.jboss.virtual.plugins.context.zip.ZipFileWrapper.openStream(ZipFileWrapper.java:214)
| at org.jboss.virtual.plugins.context.zip.ZipEntryContext.openStream(ZipEntryContext.java:1066)
| at org.jboss.virtual.plugins.context.zip.ZipEntryHandler.openStream(ZipEntryHandler.java:153)
| at org.jboss.virtual.VirtualFile.openStream(VirtualFile.java:230)
| at org.jboss.classloading.spi.vfs.policy.VFSClassLoaderPolicy.getResourceAsStream(VFSClassLoaderPolicy.java:483)
| at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:508)
| at org.jboss.classloader.spi.base.BaseClassLoader$2.run(BaseClassLoader.java:506)
| at java.security.AccessController.doPrivileged(Native Method)
| at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:504)
| at org.jboss.classloader.spi.base.BaseClassLoader.loadClassLocally(BaseClassLoader.java:481)
| at org.jboss.classloader.spi.base.BaseDelegateLoader.loadClass(BaseDelegateLoader.java:134)
| at org.jboss.classloader.spi.filter.FilteredDelegateLoader.loadClass(FilteredDelegateLoader.java:131)
| at org.jboss.classloader.spi.base.ClassLoadingTask$ThreadTask.run(ClassLoadingTask.java:452)
| at org.jboss.classloader.spi.base.ClassLoaderManager.nextTask(ClassLoaderManager.java:258)
| at org.jboss.classloader.spi.base.ClassLoaderManager.process(ClassLoaderManager.java:152)
| at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:259)
| at org.jboss.classloader.spi.base.BaseClassLoaderDomain.loadClass(BaseClassLoaderDomain.java:1102)
| at org.jboss.classloader.spi.base.BaseClassLoader.loadClassFromDomain(BaseClassLoader.java:772)
| at org.jboss.classloader.spi.base.BaseClassLoader.loadClass(BaseClassLoader.java:415)
| at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
| at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
| at org.apache.commons.digester.Digester.getXMLReader(Digester.java:905)
| at org.apache.commons.digester.Digester.parse(Digester.java:1567)
| at org.test.TestServlet.initServlet(TestServlet.java:76)
| at org.test.TestServlet.init(TestServlet.java:111)
| at javax.servlet.GenericServlet.init(GenericServlet.java:212)
| at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1048)
| at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:777)
|
|
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17 years, 1 month
[Tomcat, HTTPD, Servlets & JSP] - servlet init hangs reading /WEB-INF/web.xml 5.0.1
by mlybarger
I have a very simple servlet which hangs on the servlet init method. Another similar example I have throws an OOM excetpion doing the same thing. All the code is doing is trying to parse the web.xml using the commons digester.
I hope this isn't too much code to paste. I'm running a default 5.0.1 (same behavior on 5.0.0, but this code runs fine on the 4.2.2 server) server with 1.6.0.11 jdk.
This code originates from the struts 1.1 ActionServlet. There is a problem with the digester.parse() call. Does this have something to do with VFS perhaps?
| package org.test;
|
| import java.io.IOException;
| import java.io.InputStream;
| import java.net.URL;
|
| import javax.servlet.ServletException;
| import javax.servlet.http.HttpServlet;
|
| import org.apache.commons.digester.Digester;
| import org.apache.commons.logging.Log;
| import org.apache.commons.logging.LogFactory;
| import org.apache.struts.Globals;
| import org.xml.sax.SAXException;
|
| public class TestServlet extends HttpServlet {
|
| public TestServlet() {
| super();
| // TODO Auto-generated constructor stub
| }
|
| protected static Log log = LogFactory.getLog(TestServlet.class);
| protected String registrations[] = {
| "-//Apache Software Foundation//DTD Struts Configuration 1.0//EN",
| "/org/apache/struts/resources/struts-config_1_0.dtd",
| "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN",
| "/org/apache/struts/resources/struts-config_1_1.dtd",
| "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN",
| "/org/apache/struts/resources/web-app_2_2.dtd",
| "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN",
| "/org/apache/struts/resources/web-app_2_3.dtd"
| };
|
| protected String servletMapping = null;
| protected String servletName = null;
|
| /**
| * @see Servlet#init(ServletConfig)
| */
| protected void initServlet() throws ServletException
| {
|
| // Remember our servlet name
| this.servletName = getServletConfig().getServletName();
|
| // Prepare a Digester to scan the web application deployment descriptor
| Digester digester = new Digester();
| digester.push(this);
| digester.setNamespaceAware(true);
| digester.setValidating(false);
|
| // Register our local copy of the DTDs that we can find
| for (int i = 0; i < registrations.length; i += 2) {
| URL url = this.getClass().getResource(registrations[i+1]);
| if (url != null) {
| digester.register(registrations, url.toString());
| }
| }
|
| // Configure the processing rules that we need
| digester.addCallMethod("web-app/servlet-mapping",
| "addServletMapping", 2);
| digester.addCallParam("web-app/servlet-mapping/servlet-name", 0);
| digester.addCallParam("web-app/servlet-mapping/url-pattern", 1);
|
| // Process the web application deployment descriptor
| if (log.isDebugEnabled()) {
| log.debug("Scanning web.xml for controller servlet mapping");
| }
|
| InputStream input =
| getServletContext().getResourceAsStream("/WEB-INF/web.xml");
|
| try {
| digester.parse(input);
|
| } catch (IOException e) {
| log.error("io error", e);
| throw new ServletException(e);
|
| } catch (SAXException e) {
| log.error("error", e);
| throw new ServletException(e);
|
| } finally {
| if (input != null) {
| try {
| input.close();
| } catch (IOException e) {
| log.error("error", e);
| throw new ServletException(e);
| }
| }
| }
|
| // Record a servlet context attribute (if appropriate)
| if (log.isDebugEnabled()) {
| log.debug("Mapping for servlet '" + servletName + "' = '" +
| servletMapping + "'");
| }
|
| if (servletMapping != null) {
| getServletContext().setAttribute(Globals.SERVLET_KEY, servletMapping);
| }
|
| }
|
| public void init() throws ServletException {
| log.info("start - init()");
| initServlet();
| log.info("done - init()");
| }
|
| }
|
web.xml
| <?xml version="1.0" encoding="UTF-8"?>
| <!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
| <web-app>
| <display-name>jbtest</display-name>
| <servlet>
| <servlet-name>ActionServlet</servlet-name>
| <servlet-class>org.test.TestServlet</servlet-class>
| <load-on-startup>-1</load-on-startup>
| </servlet>
| <servlet-mapping>
| <servlet-name>ActionServlet</servlet-name>
| <url-pattern>/do/eforms-client</url-pattern>
| </servlet-mapping>
| </web-app>
|
It's been over 5 minutes sitting there with the cpu spiked and the init method didn't finish. My log only shows the start log, not the stop.
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17 years, 1 month