Help needed: ViewObjectImpl and web service

Hi!
I'm trying to make a view object (to be used in a web application) which gets its data from a web service. As the data returned from the web service might be very large, i decided to limit it with start row (number) and range size (number). The idea is to store only the needed data in the memory and when other data is needed to get it from the web service. For example, if the view is used to show rowsets with ranges of 10, there will only be 10 records in the memory. When a request is created to visualize the next 10 records, then only rows from 10 to 20 will be in the memory.
However, I am unable to figure out which method(s) in the ViewObjectImpl class to override. I'm able to get the first range, but when the scrollRange(int) is invoked, I cannot propagate the new rows.
So anyone been able to help? Any ideas are welcome!
Thanks in advance!

Hi there,
Entity objects can be based on web services, have you tried this way. Then, you can create you VO on top of this entity having perhaps a more declarative approach. If you still want to follow the programmatic VO approach, overriding hasNextForCollection or getQueryHitCount could be my initial 2 methods to look for.
- Juan Camilo

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package sample_ws;
import java.rmi.RemoteException;
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I am using Oracle Jdeveloper as an IDE and created a war file and deployed on Oracle App. Server it works fine. Now if I deploy the same war on Web Logic it gives me the following error:
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package webservice2 ;
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<definitions
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>
Sun Java System Application Server Platform Edition 8.1 Update 2
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/people/siva.maranani/blog/2005/09/03/invoke-webservices-using-sapxi
https://weblogs.sdn.sap.com/pub/wlg/1334 [original link is broken] [original link is broken] [original link is broken]
https://weblogs.sdn.sap.com/pub/wlg/2131 [original link is broken] [original link is broken] [original link is broken]
https://weblogs.sdn.sap.com/pub/wlg/1442 [original link is broken] [original link is broken] [original link is broken]
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     at com.sap.engine.services.jmx.connector.p4.P4ConnectorServerImplp4_Skel.dispatch(P4ConnectorServerImplp4_Skel.java:64)
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     at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
     at java.security.AccessController.doPrivileged(Native Method)
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     at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java:162)

Need versions of web service standards supported by SAP WAS

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for more information about jibx refer to:
http://en.wikipedia.org/wiki/JiBX
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dsws-bicatalog.jar
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dsws-common.jar
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axiom-api-1.2.5.jar
axiom-impl-1.2.5.jar
axis2-kernel-1.3.jar
axis2-saaj-1.3.jar
axis2-xmlbeans-1.3.jar
backport-util-concurrent-2.2.jar
commons-codec-1.3.jar
commons-httpclient-3.0.1.jar
commons-logging-1.1.jar
log4j-1.2.14.jar
mail.jar
stax-api-1.0.1.jar
struts.jar
wsdl4j-1.6.2.jar
wstx-asl-3.2.1.jar
xbean-2.2.0.jar
XmlSchema-1.3.2.jar
In any cases it is recommended not to have duplicated jars in your deployment and also check if the version of the jars to use is supported by the version of the JDK used.
Thanks

EAI AND WEB SERVICES

Hi,
What is the difference between web services and EAI ?
Thank you.

Hi,
Salient Differences between Traditional EAI Solutions and Web Services
A few essential differences between traditional EAI solutions and Web Services are, as follows:
Simple: There is no doubt that Web Services are much simpler to design, develop, maintain, and use as compared to a typical EAI solution which may involve distributed technology such as DCOM and CORBA. Once the framework of developing and using Web Services is ready, it will be relatively easy to automate new business processes spanning across multiple applications.
Open Standards: Unlike proprietary EAI solutions, Web Services are based on open standards such as UDDI, SOAP, HTTP and this is probably the single most important factor that would lead to the wide adoption of Web Services. The fact that they are built on existing and ubiquitous protocols eliminates the need for companies to invest in supporting new network protocols.
Flexible: Since EAI solutions may require point-to-point integration, changes made at one end have to be propagated to the other end, making them very rigid and time consuming in nature. Web Services based integration is quite flexible, as it is built on loose coupling between the application publishing the services and the application using those services.
Cheap: EAI solutions, such as message brokers, are very expensive to implement. Web Services, in the future, may accomplish many of the same goals - cheaper and faster.
Scope: EAI solutions, such as message brokers, integrate applications treating them as single entities, whereas Web Services allow companies to break down big applications into small independent logical units and build wrappers around them. For example, a company can write wrappers for different business components of an ERP application such as order management - purchase order acceptance, status of order, order confirmation, accounts receivable, and accounts payable.
Efficient: As mentioned in the previous point, Web Services allow applications to be broken down into smaller logical components, which makes the integration of applications easier as it is done on a granular basis. This makes Web Services solutions for EAI much more efficient than traditional EAI solutions.
Dynamic: Web Services provide a dynamic approach to integration by offering dynamic interfaces, whereas traditional EAI solutions are pretty much static in nature.
Read this article:
<a href="http://www.webservicesarchitect.com/content/articles/samtani01.asp">EAI and Web Services</a>
Regards,
Boris

Help needed: ViewObjectImpl and web service

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