I am trying to access the ejb deployed on websphere liberty 18.0.0.3
The binding location is: java:global/ITSORemote/ITSORemoteEJB/HelloRemoteEJB!com.ibm.itso.ejbRemote.view.HelloRemoteEJBRemote
My ORB configuration in the server.xml is:
<orb nameService="corbaname::<ipaddress>:2809" iiopEndpointRef="defaultIiopEndpoint">
<iiopEndpoint host= id="defaultIiopEndpoint" iiopPort="2809">
</iiopEndpoint>
</orb>
I have also added ejbRemote-3.2 in feature manager
I have two scenarios:
1. Access ejb from a client code running on the same server - This works using the url java:global/ITSORemote/ITSORemoteEJB/HelloRemoteEJB!com.ibm.itso.ejbRemote.view.HelloRemoteEJBRemote
2. Access ejb from a client code running on the different server - This does not work using the url
corbaname::(ipaddress):2809#ejb/global/ITSORemote/ITSORemoteEJB/HelloRemoteEJB!com.ibm.itso.ejbRemote.view.HelloRemoteEJBRemote
I am using the following code for lookup:
package com.ibm.remoteaccess;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Hashtable;
import javax.ejb.EJB;
import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.rmi.PortableRemoteObject;
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 com.ibm.itso.ejbRemote.view.HelloRemoteEJBRemote;
/**
* Servlet implementation class RemoteAccess
*/
#WebServlet("/RemoteAccess")
public class RemoteAccess extends HttpServlet {
private static final long serialVersionUID = 1L;
protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
PrintWriter out = response.getWriter();
try {
out.println("Hi");
Context ctx = new InitialContext();
Object ejbBusIntf = ctx.lookup("java:global/ITSORemote/ITSORemoteEJB/HelloRemoteEJB!com.ibm.itso.ejbRemote.view.HelloRemoteEJBRemote");
HelloRemoteEJBRemote bean = (HelloRemoteEJBRemote)PortableRemoteObject.narrow(ejbBusIntf, HelloRemoteEJBRemote.class);
out.println(bean.hello());
}
catch (NamingException e) { // Error getting the business interface
out.println(e);
}
}
}
There is no error thrown in the console also. What could be the problem?
There is a functional acceptance test (FAT) in open-liberty that looks up a remote EJB from one liberty server to an EJB on a second liberty server. The specific test can be found here:
https://github.com/OpenLiberty/open-liberty/blob/master/dev/com.ibm.ws.ejbcontainer.remote_fat/test-applications/RemoteClientWeb.war/src/com/ibm/ws/ejbcontainer/remote/client/web/RemoteTxAttrServlet.java
Each server process includes the ejbRemote-3.2 feature and an iiopEndpoint configuration (different ports since the test runs both serves on the same host).
https://github.com/OpenLiberty/open-liberty/blob/master/dev/com.ibm.ws.ejbcontainer.remote_fat/publish/servers/com.ibm.ws.ejbcontainer.remote.fat.RemoteServerClient/server.xml
If you are not seeing any errors, then perhaps the iiopEndpoint is not configured properly in the client side server (as the ORB will not start without it). For example, the default iiop port is 2809, and if both servers are on the same host, then they cannot both use that port. Setting both servers to the same port would result in the ORB not starting properly on one of the servers, and lookups would fail.
A lookup across servers would use corbaname, and the value you have specified appears to be correct.
Related
error message
21:13:46,666 DEBUG AnnotationUtils:1889 - Failed to meta-introspect annotation interface org.springframework.web.bind.annotation.RequestBody: java.lang.NullPointerException
com.alibaba.dubbo.rpc.RpcException: No provider available from registry 172.16.33.23:2181 for service com.itheima.service.CheckItemService on consumer 172.16.33.29 use dubbo version 2.6.0, may be providers disabled or not registered ?
at com.alibaba.dubbo.registry.integration.RegistryDirectory.doList(RegistryDirectory.java:572)
I have checked my Dubbo annotation package and controller's import but find that is right.
import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.constant.MessageConstant;
import com.itheima.entity.Result;
import com.itheima.pojo.CheckItem;
import com.itheima.service.CheckItemService;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
#RestController
#RequestMapping("/checkitem")
public class CheckItemController {
#Reference
private CheckItemService checkItemService;
#RequestMapping("/add")
public Result add(#RequestBody CheckItem checkItem){
try{
checkItemService.add(checkItem);
}catch (Exception e){
e.printStackTrace();
return new Result(false, MessageConstant.ADD_CHECKITEM_FAIL);
}
return new Result(true, MessageConstant.ADD_CHECKITEM_SUCCESS);
}
Also, my zookeeper started.
[root#localhost bin]# ./zkServer.sh start
JMX enabled by default
Using config: /usr/local/zookeeper-3.4.6/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
And the front end request successful.
it seems that have no problems
[zk: 127.0.0.1:2181(CONNECTED) 1] ls /dubbo/com.itheima.service.CheckItemService
[consumers, configurators, routers, providers]
anyone who can give a direction?
I can almost understand where the mistake is，but I don't know what to do.
RegisteryDirectoty.class
I'm simply trying to insert a row of data to a database using a serve-let in eclipse. I'm using the server J2EE Preview at local host. I even tried using apache tomcat v7.0. But every time 'HTTP ERROR 503' comes on the web page.
This is my code.
import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class trying extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
try {
Connection myConn = DriverManager.getConnection("jdbc:mysql://localhost:3306/mydb","root","root");
Statement myStmt = myConn.createStatement();
String sql = "insert into user values ('bandiiii', '123')";
myStmt.executeUpdate(sql);
System.out.print("done");
}catch( Exception exc) {
exc.printStackTrace();
}
}
}
Most Probably your application is down or the application is trying to hit a server that is not up and running.
Http Status code 503:
simply means that service is unavailable.
Troubleshooting:
Check if your server & Oracle servers are up and running on the specified ports.
I have a spring boot 1.2.5 service that uses jersey 2. I see the requests in my own logs but I'd like to see the raw http request and response in the console as well. How can you turn on printing http traffic to the console?
import java.util.logging.Logger;
import org.glassfish.jersey.filter.LoggingFilter;
import javax.ws.rs.ApplicationPath;
import org.springframework.stereotype.Component;
#Component
#ApplicationPath("/")
public class JerseyConfiguration extends ResourceConfig {
private static final Logger log = Logger.getLogger(JerseyConfiguration.class.getName());
public JerseyConfiguration() {
...
register(new LoggingFilter(log, true));
}
}
I have an existing web application which runs on
https://subdomain.example.com
Now I like to have additional subdomains
https://subdomain2.example.com
How can I set the following using Spring MVC so that the user will not be prompted for authentication again after being redirected from the first domain to the second domain ?
Set-Cookie: name=value; domain=example.com
Look at this controller example, but keep in mind 2 things:
putting an arbitrary fixed domain will not allow you to access the cookie when you work in your local environment if you connect to 127.0.0.1.
your cookie could be read by all the subdomain present on that host(example.com), not only by the ones you want.
Class:
package com.test.foo;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
#Controller
#RequestMapping("/foo")
public class FooController {
#RequestMapping("/cookie")
public String setCookie(HttpServletRequest request, HttpServletResponse response) {
String value = "value";
Cookie cookie = new Cookie("name", value);
cookie.setPath("/");//<-- important
cookie.setDomain("example.com");
response.addCookie(cookie);
return "foo/index";//your view
}
}
This question already has answers here:
Servlet returns "HTTP Status 404 The requested resource (/servlet) is not available"
(19 answers)
Closed 6 years ago.
First of all: I use GlassFish 3.1 + Eclipse Java EE indigo.
I want to testing cache solutions with javaee so I made a dummy app. I have a big generated database and I list, search, modify, etc some data. To do that I wrote some basic servlet and I call with GET parameters. e.g.: /app/list?page=product&pageSize=100
The ListServlet is annotated with
#WebServlet({ "/ListServlet", "/list" })
and it works like a charm, I can use both urls.
So I need some additional servlet (for search, modify). I created them and annotated the same way.
But when I type the url http://localhost/app/modify or /app/search?id=1 I get error 404.
I tried to write a very dummy helloservlet which is print a hello world message but it didn't work: error 404. I restarted the glassfish server and the computer but not helped.
What's the problem? Did I miss something?
EDIT:
the servlets are the same package uses the same imports...
Are you sure your url patterns are correct? Try something like this:
#WebServlet( name="ListServlet", displayName="ListServlet", urlPatterns = {"/list","/modify", "/search"}, loadOnStartup=1)
If you want all the patterns go into the same servlet. If not, you would have to have a different servlets for each pattern, and those servlets should be named differently I guess.
Anyway, for this kind of behaviour I would recommend using for example Restlet routing.
EDITED:
I tested it. Here you have my servlets working like a charm:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
#WebServlet(asyncSupported = false, name = "HelloServlet1", urlPatterns = {"/hello1"})
public class TestServlet extends HttpServlet {
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
out.write("<h2>Hello Servlet One </h2>");
out.close();
}
}
and the second one:
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
#WebServlet(asyncSupported = false, name = "HelloServlet2", urlPatterns = {"/hello2"})
public class TestServlet2 extends HttpServlet {
#Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
resp.setContentType("text/html");
PrintWriter out = resp.getWriter();
out.write("<h2>Hello Servlet Two </h2>");
out.close();
}
}
I do call them like: http://localhost:8080/eetest/hello1 and http://localhost:8080/eetest/hello2 and they print 'Hello Servlet One' and 'Hello Servlet Two' respectivelly.
(tested on JBoss AS 7 - web profile)
I had this issue and the problem was a forgotten import statement in my servlet. Make sure your servlet is compiling correctly.