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What is deployment descriptor

Answered by Jey on 2005-05-08 12:59:41:

Deployment Descriptor is a XML document with .xml extenion. It basically descripes the deployment settings of an application or module or the component. At runtime J2EE server reads the deployment descriptor and understands it and then acts upon the component or module based the information mentioned in descriptor.  
 
For example EJB module has a deployment descriptor ejb-jar.xml where we mention whether it is session or entity or mesage driven bean and where is the home, remore and Bean classes are located and what type of transaction etc. In a simple word, without deployment descritor the Container ( EJB/Servlet/JSP container) will not know what to do with that module.




  
Total Answers and Comments: 2 Last Update: February 09, 2008   
  
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May 08, 2005 12:59:41   #1  
Jey        
RE: What is deployment descriptor
Deployment Descriptor is a XML document with .xml extenion. It basically descripes the deployment settings of an application or module or the component. At runtime J2EE server reads the deployment descriptor and understands it and then acts upon the component or module based the information mentioned in descriptor.  
 
For example EJB module has a deployment descriptor ejb-jar.xml where we mention whether it is session or entity or mesage driven bean and where is the home, remore and Bean classes are located and what type of transaction etc. In a simple word, without deployment descritor the Container ( EJB/Servlet/JSP container) will not know what to do with that module.
 
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February 09, 2008 13:59:52   #2  
kirankpv Member Since: February 2008   Contribution: 2    
RE: What is deployment descriptor
Deployment Descriptor is a XML document with .xml extenion. It basically describes the deployment settings of an application . At runtime webcontainer reads the deployment descriptor and understands  which .class file is mapped to the url-patteren name based on the information mentioned in descriptor.  the webcontainer calls that file
 
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 Related Questions

Answered by Jey on 2005-05-08 11:23:41: In J2EE application modules are packaged as EAR, JAR and WAR based on their functionality  JAR: EJB modules which contains enterprise java beans class 
Latest Answer : EAR is an EEnterprise Aapplication archive and may contain ejb JAR files, WAR files, and RAR (connector) files. They may also contain third-party libraries - but you have to know how to manipulate the Java extension facilities (e.g. MANIFEST.MF Class-Path ...
Answered by Jey on 2005-05-08 12:59:41: Deployment Descriptor is a XML document with .xml extenion. It basically descripes the deployment settings of an application or module or the component. At runtime 
Latest Answer : Deployment Descriptor is a XML document with .xml extenion. It basically describes the deployment settings of an application . At runtime webcontainer reads the deployment descriptor and understands  which .class file is mapped to the url-patteren ...
Answered by Jey on 2005-05-08 12:09:49: Re-entrant means where Bean A calls methods of Bean B and then Bean B turns around and calls methods of Bean A. The above all within a single thread of control. 
Latest Answer : Also, check the deployment descriptor called in weblogic-ejb-jar.xml. If methods are marked as Idempotent, then repeated calls to the same method with the same parameters has exactly the same effect as a single call. Useful ...
Why are ejbActivate() and ejb Passivate() included for stateless session bean even though they are never required as it is nonconversational bean
To have a consistent interface, so that there is no different interface that you need to implement for Stateful Session Bean and Stateless Session Bean. Both Stateless and Stateful Session Bean implement 
Latest Answer : It is web.xmlthis file contain mapping of ActionServlet with the configuration file for single or multipleinfo about url atternmapping of tag uri with struts tags locationPardeep Dureja ...
Read Answers (4) | Asked by : srinu
As per the weblogic ejb documentation:ejb-jar.xml and weblogic-ejb-jar.xml are the deployment descriptor files required one per ejb. My question is how about multiple ejb deployments?Thanks
Read Answers (3) | Asked by : hmashruf
What is "reentrant"? Why we use this in the deployment descriptor? Explain with an example.
Read Answers (2) | Asked by : Somashekhara

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