There is an EJB component, servlet and one library. All this works on a single GlassFish server.
The library implements only one interface, common for the ejb component and the client:
Datable.java
package ru.jcup.api; import javax.ejb.Remote; @Remote public interface Datable { public String getData(String request); } An EJB application is also only 1 class:
DatableImpl.java
package ru.jcup; import javax.ejb.EJB; import javax.ejb.Stateless; import ru.jcup.api.Datable; @Stateless @EJB(beanInterface=Datable.class) Public class DatableImpl implements Datable{ @Override public String getData(String request) { return request + " Hell world!"; } } Well, the servlet itself:
MyServlet.java
package ru.jcup.servlet; import java.io.IOException; import java.io.PrintWriter; import javax.naming.Context; import javax.naming.InitialContext; import javax.naming.NamingException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import ru.jcup.api.Datable; @WebServlet("/getdata") public class MyServlet extends HttpServlet { public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { response.setContentType("text/html"); try { Context context = new InitialContext(); Object proxy = (Object)context.lookup("java:global/EjbServer/DatableImpl"); System.out.println("!!!"+proxy); //<- тут выводится !!!ru.jcup.Datable_294616051 Datable datable = (Datable)proxy; //<- исключение тут PrintWriter out = response.getWriter(); out.println("<h1>" + datable.getData("What is it?") + "</h1>"); } catch (NamingException e) { e.printStackTrace(); } PrintWriter out = response.getWriter(); out.println("<h1>Bad!</h1>"); } } When I start the servlet, I get the following exception:
2016-01-12T14:41:20.250+0300|Warning: StandardWrapperValve[ru.jcup.servlet.MyServlet]: Servlet.service() for servlet ru.jcup.servlet.MyServlet threw exception java.lang.ClassCastException: com.sun.proxy.$Proxy222 cannot be cast to ru.jcup.api.Datable at ru.jcup.servlet.MyServlet.doGet(MyServlet.java:46) at javax.servlet.http.HttpServlet.service(HttpServlet.java:687) at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160) at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734) at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673) at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174) at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282) at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459) at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167) at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201) at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175) at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235) at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284) at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201) at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133) at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112) at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77) at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561) at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56) at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565) at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545) at java.lang.Thread.run(Thread.java:745) Notice that the string in the cerlet is:
System.out.println("!!!"+proxy); displays to the console "!!! ru.jcup.Datable_294616051", In theory, the caste should work fine, but this does not happen. This is the question.
