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Rama Raghavan

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Recent posts by Rama Raghavan

Why is this a stateful session bean..? There could be multiple instances of this bean, so the same ID may be served more than once. Do you intend the ID (key) to be unique across some space..?
I must be missing something.


2. Does this mean the app server opens a http connection with the web server as well ?
....For instance, if you are analyzing an image while building the content, then you will need the resource to be on the app server.


Thanks for mentioning it..'cos that is what I should have stated in my post..
Can the resource (static content) be on the http server or should it have to be on the app server ?
This is a generic web architecture question:
Consider we have a web server (say iPlanet) and an application server (say, weblogic, or webshpere). The application is deployed as a war file on the app server. The web server and app server are on two different boxes (unix).
The weblogic plug-in on the iPlanet directs traffic to the app server based on ppath.
A given URL resolved on the app server (via jsp/servlets/ejb communication) may have static content such as images or links to html etc.
Seems to me that the static content can be managed better by not putting them inside the war file..say I have updates to the images, etc..BUT
1. Could the static content (gifs, text, multi-media files, flash, javascript) for an application be stored on the web server, while dynamic content (jsp/servlets) be located on the app server ?
2. Does this mean the app server opens a http connection with the web server as well ?
3. What are the performance issues with this model ?
4. Are there best practices anyone can share on this
Thanks much -
This is a generic web architecture question:
Consider we have a web server (say iPlanet) and an application server (say, weblogic, or webshpere). The application is deployed as a war file on the app server. The web server and app server are on two different boxes (unix).
The weblogic plug-in on the iPlanet directs traffic to the app server based on ppath.
A given URL resolved on the app server (via jsp/servlets/ejb communication) may have static content such as images or links to html etc.
Seems to me that the static content can be managed better by not putting them inside the war file..say I have updates to the images, etc..BUT
1. Could the static content (gifs, text, multi-media files, flash, javascript) for an application be stored on the web server, while dynamic content (jsp/servlets) be located on the app server ?
2. Does this mean the app server opens a http connection with the web server as well ?
3. What are the performance issues with this model ?
4. Are the best practices anyone can share on this
Thanks much -
Concur with Byron.
Thanks Craig and David for your time and valuable information.
1. Does JDO support/provide for distributed transactions ? Does JDO operations on an object become part of an enclosing Usertransaction ?
2. I haven't read the API much, but say if I Abort a transaction, I am guessing the object will go to its original state automagically and I do not have to make additional calls for reinitializing the object from the DB..?
ODBMS have been mentioned well before JDO..
Would one still choose an object database or will JDO drive Object Databases from concept to near death (ofcos there are some production impls) ?
[ June 19, 2003: Message edited by: Rama Raghavan ]
While were are at it, thought I'd ask..
Are there a pre/post events that consumers can register for, and be notified, when the state of an object changes and is persisted ?
Is there any event model for JDO ?
Does JDO populate the oject from database as you traverse thru the object relationship or is the whole object (including all the relations for that object) retrieved as one invocation..?
Can JDO be used for LDAP Directory stores as well.
ie. Does this api/vendor impl support LDAP Directory stores, or is JDO strictly for relational data stores..
Rama
Traditionally, for instance, using JDBC, we can explicitly obtain a read lock when required, and then update the record, or when using EJBs, I believe there is a single instance of an Entity bean, say, for a given key, and the container single threads transactions on that bean instance unless READ-ONLY beans where it may be relaxed.
Wasn't sure how JDO deals with objects accessed from multiple threads (or sessions). Its not the gotcha's, but the behavior I guess I was looking for.
Rama
[ June 18, 2003: Message edited by: Rama Raghavan ]
I've used some home grown persistance of objects, JDBC and EJB, but not JDO (yet).
Could someone share what are the gotchas with JDO wrt concurrency..
Rama
Agreed it has rich visual and keyboarding values..
BUT -
With application deployment over the web becomming so common(even for intranet apps) , why would one invest time (and money) to build Swing based client apps..?
Rama
18 years ago
Welcome Mark..
What kinda of additives/bells and whistles has Microsoft added to web services that is over and beyond the call of the standards/protocol?
With a known history (unfortunately), always wonder what holes Microsoft leaves open on this front..
Rama
18 years ago
1. What are the vulenrabilities with regards to using SOAP / web services ?
2. Are there additional risks of being hacked when using web services ?
Rama
18 years ago