Difference between rmi us ejb
difference between rmi and ejb
i asked differences only u dont know plz keep
silentYou don't know it either. I don't see anything wrong with that message. The first thing to do when you have a question is search for the information already available. With these kind of messages, you are reducing your chances of getting a good reply (which is likely to be "search google")
why forum mr reflex2javaPlease use complete sentences that make sense to English speakers.
Similar Messages
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Difference between RMI-IIOP and CORBA-IIOP
Hello,
What is the difference between RMI-IIOP and CORBA-IIOP?
Thanks
LarryLawrence Manickam <[email protected]> writes:
What is the difference between RMI-IIOP and CORBA-IIOP? RMI-IIOP is the protocol represented by the mapping of Java RMI
artifacts to IDL, i.e. you start with Java and use the RMI programming
model. CORBA / IIOP is really just the protocol used for IDL sourced
objects, i.e. you start with IDL and use the CORBA programming model.
andy -
Difference between RMI and Java Beans
Hello
I have to develop a program that allow the users to have access to the Patient information . The program will also organize appointment between the users and the patients. + extra thing like agenda .....
I will have about 10 to 20 user that will have access at the same time to the same info .
My question is :what is the best solution for such kind of programes
RMI :after searching in google (it is light weight )
java beans:more powerful than RMI
or maybe thread ???
any one can explain the difference please ?
Thank youA little [url http://www.google.ca/search?hl=en&q=rmi+ejb&btnG=Google+Search&meta=]google with keywords: rmi ejb would give all the answers you need.
Specifically you could read [url http://www.devx.com/Java/Article/20843/0/page/1]the article from the first result: EJB and RMI: A Practical Introduction.
Also there are many threads from these forums that already answered your question in the past.
Here is one: [url http://forum.java.sun.com/thread.jspa?threadID=539544&messageID=2613399]Rmi and EJB.
Happy reading!
Regards -
Hi developers,
In NW 7.3 we have two EJB annotations with identical meaning:
javax.annotation.PostConstruct
and
com.sap.ejb.annotations.AppStartup
A method annotated like this is invoked by the container right before the EJB is made available to clients.
Can anyone explain the difference between the two annotations?
Thanks, regards
VincenzoHi
PostConstruct = EJB standard, AppStartup = SAP proprietary.
As far as I understand the descriptions, the AppStartup callback invocation occur for all EJBs immediately when the application is starting (no matter if the EJB is called or not) whereas "The PostConstruct callback invocations occur before the first business method invocation on the bean. This is at a point after which any dependency injection has been performed by the container." (see EJB spec).
So the PostConstruct has nothing to do with application life cycle but with the lifecycle of a single bean instance. PostConstruct may be called later on first client invocation) and in AppStartup, you probably do not have dependency injection performed but have to lookup using java:comp/env.
Regards
Rolf -
Wht is the difference between hibernate and EJB 3.0
What are the main features differences in Hibernate and EJB3.0. What one should we prefer to use. Can some one provide me links to work and learn on these two technologies in depth.
Hello all,
Apart from what we are discussing above there is one more intresting feature which allows to work with any database without modifying the code, this is becuase of hibernate layer in application. Hibernate sits in between you application's logic and database, and you access your database with the help of objects (POJO) and write the data accesing queries in Object form(HQL - Hibernate Query Language) which is indepened of all database. whenever you want to chage your backed database just change the configuration files(hibernate.cfg.xml) and you are done. Isnt is cool feature, you dont need to worry about the underlying database.
Surya
--Idea's can change everything -
What is the difference between RMI and JAX-RPC?
Dear All
First of all my understanding of RMI and JAX-RPC:
RMI is JAVA only version of RPC. It can't talk to any other language.
JAX-RPC is a part of JWSDP and if you implement your client and server with JAX-RPC, client written in any language can talk with JAX-RPC implementation.
What else makes them different and am I right with my understanding?
Finally, I would like to develop clients which will have a java class, say httpserver.java, which will act like a http server, listens to a http port. Now, Two such client will run in two different PC and I want to call a module from one client to another which should be accessible via my httpserver.java. For that which should be my choice RMI or JAX-RPC? Can I achive it with http get-post method, as I am expecting to read some value of variables from one client to the another.
Say class A has variable a, aa, aaa and clas B has variable b, bb, bbb. Now I want to read the value of b, bb, bbb from class A. How do I do that when class B is listening to a http port with my httpserver.java class.
Lastly, say B is listening to a http port and I want to send a file to B from A. How can I do that? Remember, B didn�t ask for that. How can A send a file to B when B is listening to a http port with my httpserver.java.
With regards
Mohammed Jubaer Arif
Mobile: +61-0411215302
Personal Web: http://www.geocities.com/jubairarifctg/
Org. Web.: http://www.geocities.com/halimschamber/simply put, RMI allows you to (semi) transparently treat remote objects as if they were local, and your distributed application can be written (more or less) like a "normal" java app. Sockets just give you a "raw" connection to work with, and you get to build up your application from that.
I hope that helped
Lee -
Difference between RMI and NET
Hi
when i have to use java.rmi and java.net
or when i have to use socket programming
and when i have to use java.rmiHi
when i have to use java.rmi and java.net
or when i have to use socket programming
and when i have to use java.rmi -
Hi guys,
i feel ejb is internally using rmi.Am i right?what are the differences between rmi and ejb and also what r the similarities?
Thanks
Regards
Vivek.SRMI is just an API that allows Java classes to be invoked remotely. It uses Java Remote Method Protocol. But it also can use IIOP in which case this whole thing is called RMI-IIOP.
RMI doesnt provide any component model like EJB, that has several types of components with well defined behavior and purpose.
Since EJB's can be called remotely they may use JRMP but it's not mandatory.
EJB's have to use IIOP as a connection protocol to ensure interoperability among EJB servers and CORBA ORB's. So EJB' s use RMI as an API, but they have to support IIOP and optionally some other protocols like JRMP. For example, WebLogic supports some interesting protocol called T3.
best regards,
Maris Orbidans
SCJP SCWCD SCBCD -
Difference btwn RMI and Network prog.
Hello to all,
iam currently learning RMI and pls tell me what is the difference between RMI and Network Programming(using sockets....)
Thanx in advance.RMI sits on top of sockets and basically lets you send objects over the wire. Network programming is underneath and it handles all the transmission issues.
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Difference Between JMS and RMI
Difference Between JMS and RMI in J2EE Technologies
STFW
JMS - http://www.google.co.za/search?hl=en&q=what+is+jms&meta=
RMI - http://www.google.co.za/search?hl=en&q=what+is+rmi&meta= -
Difference between narrow() method usage and simple class cast for EJB
Hi,
I have a very simple question:
what is the difference between PortableRemoteObject.narrow(fromObj,
toClass) method usage and simple class cast for EJB.
For example,
1)
EJBObject ejbObj;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)PortableRemoteObject.narrow(ejbObj,ABean.class);
OR
2)
EJBObject bean;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)ejbObj;
Which one is better?
P.S. I'm working with WL 6.1 sp2
Any help would be appreciated.
Thanks in advance,
Orly[email protected] (Orly) writes:
Hi,
I have a very simple question:
what is the difference between PortableRemoteObject.narrow(fromObj,
toClass) method usage and simple class cast for EJB.
For example,
1)
EJBObject ejbObj;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)PortableRemoteObject.narrow(ejbObj,ABean.class);
OR
2)
EJBObject bean;
// somewhere in the code the home.create() called for bean ...
ABean a = (ABean)ejbObj;
Which one is better?(1) is mandated by the spec. It is required because CORBA systems may
not have sufficient type information available to do a simple case.
P.S. I'm working with WL 6.1 sp2 You should always use PRO.narrow()
andy -
Differences between @EJB and @Resouce?
Hi,
I am confused about the differences between @EJB and @Resource?
1.
Can Session Beans be injected for both?
If so what are the pro's / con's?
2.
Are the any difference between the type of components that cna be registered for one but not the other?
3.
Are they both equally usable with the ENC?
Many thanks.@EJBs are 'special' resources. For example, @EJB (for a stateful session bean) results in
1. Creation of the Stateful Session Bean,
2. Other dependencies are injected into this newly created bean,
3. If the bean has a @PostConstruct bean then that method is invoked (after invoking applicable interceptors)
Hope this helps -
Difference between Naming.lookup and Registry.lookup in RMI
Hi Folks,
I have an RMI client which tries to look up a remote object using both
Naming.lookup("//host[:port]/name OR rmi://<host_name>[:<name_service_port>]/<service_name>") and LocateRegistry.getRegistry().lookup("rmi://<host_name>[:<name_service_port>]/<service_name>").
The first one fails whereas the second one succeeds. I am in a fix as to why it is so.Is there any difference between the lookup methods provided by Naming and Registry?
The remote object was registered on the server using
LocateRegistry.createRegistry().rebind("rmi://<host_name>[:<name_service_port>]/<service_name>").I suggest you take a look at this site to understand how to ask questions.
And don't crosspost again -
Difference between ejb 3.0 and hibernate
Hi, I'm new at ejb 3.0 and I've read a little about Hibernate too, but there's one thing I don't understand. Could you tell me what's the difference between using ejb 3.0 and Hibernate, both of them are for persistence, and What about toplink?
Hi, I'm new at ejb 3.0 and I've read a little about Hibernate too, but there's one thing I don't understand. Could you tell me what's the difference between using ejb 3.0 and Hibernate, both of them are for persistence, and What about toplink?
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DataSource - difference between ejb-location and location
Hi,
Does anyone know difference between ejb-location and location attribute specified in datasources.xml for an emulated datasource.
There are few connection leakage errors reported in log files though the connection and other database objects have been closed in finally block in all places.
So just wanted to find out whether specifying the same value for location as well as ejb-location is not the root cause of connection leakage errors.
Thanks in advance for any help.
Regards,
SmitaSmita,
Personally, I think you should make sure that all locations (in your "data-sources.xml" file) should be different -- although I can't tell you why.
According to the documentation, the "ejb-location" uses a connection pool and I exclusively use the "ejb-location".
Good Luck,
Avi.
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