I am using EJB (Stateless) without any web service. I simply need to send a String from Client to Server
I can connect any Java SE Client with this EJB. But how I can connect an Android Client with this EJB (i.e. Using EJBRemote Interface) directly? I am using :
Glassfish Application Server
Netbeans IDE
I have some embedded systems (with web server) putting their states, sensor values into an XML file.
<sensor1>
<temp>21.4</temp>
<unit>°C</unit>
</sensor1>
Now I played a little with EJB3. I want to start a timer bean in a 10second interval which retrieves the IP of registered devices from a databases, opens client sockets with a Thread Pool and retrieves the XML file over HTTP GET of each device listed in the db.
Is it possbile with EJB3? how to start thread based background services like that within EJB3 timer bean?
How can I connect to multiple Databases (using @PersistenceContext) using an EJB? Did I need to connect various Entity Managers corresponding to the each database and simply send my Queries?
I am using Glassfish Application Server
Netbeans IDE
Java Derby Database
Oracle Database
Java Persistence API
We have a J2EE business web application that runs in WebLogic. We noticed in application log files errors messages that seems like "No resource available in db pool", it means all the connection objects (to Oracle database) are used. Then the application is unstable and unseable.
I think the maximum number of connections configured in Weblogic pool has been reached due to an increase of users and activity. But when the workload decreases the application is still out of service. It seems connections objects are not relased to the pool. What can be the explanation for this issue ? Normally it is managed by the container (EJB3 for the business tier).
Once the limit of the pool is reached it is necessary to restart the server to solve this kind of error ?
I am runing ejb3 in weblogic 10.3 and struts in tomcat server. both communication is not happening .
root dir
onlyenb6
account class
package ejb3.onlyejb;
import java.io.Serializable;
import javax.persistence.Entity;
import javax.persistence.Id;
[Code] ....
Get error
accno=44
na=hjhjhj
bal=777.0
enter in to if loop
jndi properties nuderprocess
jndi properties nuderprocess22
loading p file={java.naming.provider.url=t3://localhost:7001,
[Code] ....
I'm using EJB 3.1 and JBOSS 7.1.. Is it possible to create and write a file(CSV) directly to SFTP server?
View Replies View RelatedDeploy sample J2EE app to WebLogic server
A getting started app is fine, need to understand of deploying a sample application to WebLogic server. Any particular configuration during WLS install?
I have a https connection from Client to Server and a malware in client. The malware modifies the message and compromises its integrity. I am using a proxy to check the Integrity of the message after the malware has changed the message and before sending it over the internet to the server.
Now, How can I check the Integrity of the message (Sure that it has not been modified by any Man in the Middle) for the second half of my communication channel(Which is from Client to the Server over the internet).
I see few conventional approaches of CRC or Checksum will work. But I am looking for some non traditional or upcoming approaches.
Ideally SSL Data shouldn't be able to be decrypted by any MIM. But my assumption is that any Protocol is subjected to attack and compromised in real world and few recent studies are proving that https is breakable. Thus, I am trying to perform a What if analysis? On the client side, lets say malware is not more powerful than just modifies the transaction amount and destination account number in a typical online Baking transaction.
I'm trying to install java_ee_sdk-6u3-jdk7-windows-x64.exe on our new Windows Server 2012 machine but the installer starts and I then get a Setup box appear that says Error: The Java(TM) Virtual Machine has aborted. I've looked in the Event Viewer and there are no messages and I've tried to get the installer to create a log file (by passing the parameter -l <loglocation>) but it doesn't seem to get that far as no log is created.
The very first time I tried to run the JavaEE install on this machine, it installed everything ok but didn't create the windows service as .NET Framework 3.5 was missing. So I uninstalled JavaEE and added in the .NET Framework 3.5 and then my problems began. I have already installed these versions of Java and JavaEE successfully on a previous Windows Server 2012 machine which had the .NET Framework 3.5 on it.
The JRE installed already on the computer is jre-6u45-windows-x64.exe and I am logged in as an administrator. I've tried uninstalling the JRE and reinstalling and also doing a registry clean using CCleaner incase there are any old references to the JRE/JavaEE but it didn't work.
I have created a sample java web service client using Apache Axis. It works well with basicHTTPbinding (without security and Basic authentication).I am not able to make a secured communication. How to make it work in a secured way using NTLM or any other security.
View Replies View RelatedI am trying to deploy an android application that connects to a java server. I am doing an apointments system, so the client asks for an apointments with a specific office/doctor. What i did, was to create a java server, using object for the offices, and via sockets it communicates with the android client.
The problem is that when i tried to use my (very demo still) app on my phone and sent it to some friends for testing, i coulnt find a way to have my server on the internet.
So I changed to (or trying to) servlet. But, how to do a client server application with servlets. All tutorials i have seen are more on website clients, but thats not what i need.
How to get messages from WebSphere MQ using ejb MDBs and I have to deploy this in Weblogic server.
View Replies View RelatedIDE: Netbeans 8.0.
Server ejb:
"@Stateless
public class ejb implements ejbRemote{
public String say(){
return "hello";
[Code] ....
When I run the Web project on the Server host, it's OK. But when I run it on another host it returns error. I can access 192.168.0.2:7676 in browser(returns some context string), so it may not be caused by firewall.
I think the problem is the initalContext is not generated from 192.168.0.2:7676 but from local JVM, because when when running it in the Server I change the ip address to random number it also is OK.
I have included the log4j.jar in libraries; added log4j.xml in the sources folder; but I am getting an error:
<Apr 22, 2014 11:07:50 AM PKT> <Warning> <EJB> <BEA-010065> <MessageDrivenBean threw an Exception in onMessage().
The exception is:
java.lang.NoClassDefFoundError: org/apache/log4j/Logger.
java.lang.NoClassDefFoundError: org/apache/log4j/Logger
at test.MyMessageBean.onMessage(MyMessageBean.java:39)
at weblogic.ejb.container.internal.MDListener.execute(MDListener.java:575)
at weblogic.ejb.container.internal.MDListener.transactionalOnMessage(MDListener.java:477)
at weblogic.ejb.container.internal.MDListener.onMessage(MDListener.java:375)
at weblogic.jms.client.JMSSession.onMessage(JMSSession.java:4855)
Truncated. see log file for complete stacktrace
how to resolve this???
I have a question about enumerations,
class Test{
public enum Gender{
Male, Female
}
@Enumerated(EnumType.STRING)
@Column(length=1)
private Gender gender;
}
My question is this correct? My goal is to keep only one character of the enumeration .
I am looking for the ability, on the server side, to run programs or "jobs" in a job queue, where the jobs are processed as first in first out. If you are familiar with the IBM iSeries, they have a built in job queue mechanism which accomplishes what I am looking for. The primary purposes for this would be to process and update large amounts of data in a thread safe environment.
View Replies View RelatedI tried to develop a sample project with reference to : [URL] .....
When I try to run the client, I get the following error
javax.naming.NameNotFoundException: ejb: not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:771)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:779)
at org.jnp.server.NamingServer.getObject(NamingServer.java:785)
at org.jnp.server.NamingServer.lookup(NamingServer.java:396)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
[Code] .....
I am using EJB 2.1 when i am tryinh to access another bean from one bean I am getting :
javax.ejb.ObjectNotFoundException:No such entity the full stack trace is given ...
javax.ejb.ObjectNotFoundException: No such entity!
09:06:05,795 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCFindEntityCommand.execute(JDBCFindEntityCommand.java:46)
09:06:05,795 ERROR [STDERR] at org.jboss.ejb.plugins.cmp.jdbc.JDBCStoreManager.findEntity(JDBCStoreManager.java:591)
09:06:05,795 ERROR [STDERR]
[Code] .....
I'm deploying an EAR file on weblogic 10.3.4. The EAR file contains a war file and a jar file that implements web services using EJBs.
The application deploys and is functioning correctly. The application is available from the following URLs:
web application: [URL] ....
web services: [URL] ....
However, I would like configure the deployment to insert the "app1" string into the URL so the application is available like this:
web application: [URL] ....
web services: [URL] ....
I've been looking at some of the configuration options in deployment plans, but can't seem to get anything working.
I'm writing an enterprise application to familiarize myself with Glassfish 3.1.2 and EJB 3.1. I've created several local, stateless beans, and injected one into a JSF managed bean. The ejb and web modules compile fine, but when I launch the application with Glassfish I get the following startup error and the application does not deploy.
SEVERE: Exception while invoking class org.glassfish.ejb.startup.EjbDeployer prepare method
SEVERE: Exception while invoking class org.glassfish.javaee.full.deployment.EarDeployer prepare method
SEVERE: Exception while preparing the app
SEVERE: Unable to load the EJB module. DeploymentContext does not contain any EJB.
org.glassfish.deployment.common.DeploymentException: Unable to load the EJB module. DeploymentContext does not contain any EJB.
Check the archive to ensure correct packaging for D:DocumentsNetBeansProjectsTestdistgfdeployTestTest-war_war.
If you use EJB component annotations to define the EJB, and an ejb or web deployment descriptor is also used, please make sure that the deployment descriptor references a Java EE 5 or higher version schema, and that the metadata-complete attribute is not set to true, so the component annotations can be processed as expected :
at org.glassfish.javaee.full.deployment.EarDeployer.prepare(EarDeployer.java:166)
at com.sun.enterprise.v3.server.ApplicationLifecycle.prepareModule(ApplicationLifecycle.java:871)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:410)
at com.sun.enterprise.v3.server.ApplicationLifecycle.deploy(ApplicationLifecycle.java:240)
at org.glassfish.deployment.admin.DeployCommand.execute(DeployCommand.java:389)
[Code] ......
Recently we updated out database and we changed our tables' and columns' names, I'm developing an adf application with EJB3.0 the question is that the new column names start with a number (eg. 001U_ID), its a kind of encoding the names of the tables so no one can modify the values.
When I create a query on the table it is throwing an exception:
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Incorrect syntax near 'U_ID'.
I think the problem is that the EJB3.0 doesn't recognize column names starting with a number!!! What can I do to solve this issue?
I finish reading The EntityManager Interface in JEE tutorial. I know I can use container manager entity manager in EJB, but I want to explore how to use application managed entity manager in EJB.
Can I use application managed entity manager in EJB (container management JTA transaction is used)? Where do I should close entity manager if can?
The following is an example from JEE tutorial, but didn't find where to calose entity manager. and can I create mutiple EntityManagerFactory objects and Entity Manager objects to use them in a JTA transaction?
@PersistenceUnit
EntityManagerFactory emf;
EntityManager em;
@Resource
UserTransaction utx;
[Code] .....
Web Layer - JSP/Servlets
Business Layer - EJB 3
I want to develop separate projects for web layer (.war) and for Business layer (.jar). I want to deploy these layers on different Glassfish servers.
Here is my Approach -
1. Create a separate module for remote interfaces (.jar), use @remote annotations
2. Create a Web module using JSP/Servlets (.war) and use this remote interface jar in it.
3. Create a EJB module (.jar) and implement these remote interface in it.
4. Use JNDI in Web layer to access the EJB methods.
I want to know if this is the correct approach?
I'm using EclipseLink with EJBs. In my Entity bean class, I defined a column for the ROWID column:
@Id
@Column(name = "ROWID")
public String getRowid() {
return rowid;
}
public void setRowid(String rowid) {
this.rowid = rowid;
}
This @Id column is part of a composite key in my Id class using multiple @Id columns.
After I selected records from DB and try to print out the value in log, I see something like:
oracle.sql.ROWID@12b012b0
In the above String, after the portion "oracle.sql.ROWID@", the value always consists of 2 repeated parts, in this case "12b0".
This is completely different from the value I see when run SQL directly in my DB tool (PL/SQL developer) to select ROWID column.
Also, selecting the same record again later in the application will give me a different rowid String value.
Using EntityManager method calls (em.find(), em.merge()....) will always fail since the ROWID value is incorrect.
My question is, is the java String type not suitable as receiver for Oracle ROWID?
Or is it simply Oracle ROWID cannot be used with EclipseLink, only JDBC?
Since I'm not using JDBC, we cannot use the oracle.sql.ROWID type as receiver.
There is a weblogic server running at remote place and i need to access the API's in that remote method using JNDI lookup. My application is configured in Spring Tool Suite IDE with java 6 and tomcat 7 and I have used Spring to perform the jndi lookup of weblogic server. In spring i have used simpleremotestatelesssessionproxyfactorybean class to lookup a weblogic server using jndi and get the remote object. But somehow on doing it i'm getting the following error.
org.omg.CORBA.COMM_FAILURE: vmcid: SUN minor code: 203 completed: Maybe
at com.sun.corba.se.impl.logging.ORBUtilSystemException.writeErrorSend(Unknown Source)
at com.sun.corba.se.impl.logging.ORBUtilSystemException.writeErrorSend(Unknown Source)
at com.sun.corba.se.impl.transport.SocketOrChannelConnectionImpl.sendWithoutLock(Unknown Source)
at com.sun.corba.se.impl.encoding.BufferManagerWriteStream.sendFragment(Unknown Source)
[Code] ....
The exception is been thrown at com.sun.corba.se.impl.encoding.CDROutputObject method when calling writeTo(). Why I'm getting this error and can I do anything to remediate it. Irrespective of java this error occurs, i tried with java 5, 6 and 7 but still getting the same error.
Trying to deploy the application with webService project fails with below error
weblogic.j2ee.dd.xml.AnnotationProcessException: [EJB:015001]Unable to link class oracle.apps.scm.productCollaboration.common.businessClasses.businessClassesService.applicationModule.
server.BusinessClassServiceImpl in Jar /scratch/software/mw_local/FMWTOOLS_11.1.1.7.0_GENERIC_121222.1001.2_PATCHES4FA_11.1.1.7.0_PLATFORMS/jcyril/mw_home_standalone/user_projects/domains/fusion_domain/servers/AdminServer/upload/ProductLifecycleManagementApp
[Code] ....