Web Services with Large Result Sets

Hi,
We have an application where in a call to a web service could potentially yield a large result set. For the sake of argument, lets say that we cannot limit the result set size, i.e., by criteria narrowing or some other means.
Have any of you handled paging when using Web Services? If so can you please share your experiences considering Web Services are stateless? Any patterns that have worked? I am aware of the Value List pattern but am looking for previous experiences here.
Thanks

Joseph Weinstein wrote:
Aswin Dinakar wrote:
I ran the test again and I removed the ResultSet.Fetch_Forward and it
still gave me the same error OutOfMemory.
The problem to me is similar to what Slava has described. I am parsing
the result set in memory storing the results in a hash map and then
emptying the post processed results into a table.
The hash map turns out to be very big and jvm throws a OutOfMemory
Exception.
I am not sure how I can turn this around -
I can partition my query so that it returns smaller chunks or "blocks"
of data each time(say a page of data or two pages of data). Then I can
store a page of data in the table. The problem with this approach is
that it is not exactly transactional. Recovery would be very difficult
in this approach.
I could do this in a try catch block page by page and then the catch
could go ahead and delete the rows that got committed. The question then
becomes what if that transaction fails ?It sounds like you're committing the 'cardinal performance sin of DBMS processing',
of shovelling lots of raw data out of the DBMS, processing it in some small way,
and sending it (or some of it) back. You should instead do this processing in
a stored procedure or procedures, so the data is manipulated where it is. The
DBMS was written from the ground up to be a fast efficient set-based processor.
Using clever SQL will pay off greatly. Build your saw-mills where the trees are.
JoeYes we did think of stored procedures. Like I mentioned yesterday some of the post
processing depends on unicode and specific character sets. Java seemed ideally suited
to this since it handles these unicode characters very well and has all these libraries
we can use. Moving this to DBMS would mean we would make that proprietary (not that we
wont do it if it became absolutely essential) but its one of the reasons why the post
processing happens in java. Now that you mention it stored procedures seem the best
option.

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[servicegen]      at weblogic.ant.taskdefs.webservices.autotype.ComponentAutoTyper.mapComponent(ComponentAutoTyper.java:113)
[servicegen]      at weblogic.ant.taskdefs.webservices.autotype.EJBAutoTyper.run(EJBAutoTyper.java:100)
[servicegen]      at weblogic.ant.taskdefs.webservices.autotype.AutoTypeTask.execute(AutoTypeTask.java:350)
[servicegen]      at weblogic.ant.taskdefs.webservices.servicegen.ServiceGenTask.generateService(ServiceGenTask.java:248)
[servicegen]      at weblogic.ant.taskdefs.webservices.servicegen.ServiceGenTask.execute(ServiceGenTask.java:141)
[servicegen]      at org.apache.tools.ant.Task.perform(Task.java)
[servicegen]      at org.apache.tools.ant.Target.execute(Target.java)
[servicegen]      at org.apache.tools.ant.Target.performTasks(Target.java)
[servicegen]      at org.apache.tools.ant.Project.executeTarget(Project.java)
[servicegen]      at org.apache.tools.ant.Project.executeTargets(Project.java)
[servicegen]      at org.apache.tools.ant.Main.runBuild(Main.java)
[servicegen]      at org.apache.tools.ant.Main.start(Main.java)
[servicegen]      at org.apache.tools.ant.Main.main(Main.java)
BUILD FAILED
E:\java\projects\CMP20CMR-xdoclet\script\build.xml:498:
weblogic.xml.schema.binding.BindingException: Error: bean property and
public field found with the same name: id

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class="statusMessage">Bad Request
</h3>
</div>
</div>
<div id="xWhiteContentContainer" class="xContentWide">
<div class="xWhiteContent">
<div class="errorPage">

<ul class="reasons"><li class="badRequestReason">uriRequest path contains unbound parameters: deptno</li>
</ul>Thanks,
Pat
Edited by: patfmnd on May 8, 2013 3:33 AM

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xmlns:soap12="
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     I am facing a deployment issue with Oracle ESB. I am trying to call an external Web Service with authentication from ESB SOAP Service. It is working fine with my local ESB version 10.1.3.3.0 Build PCBPEL_10.1.3.3.0_GENERIC_070615.0525; however it is getting an error at our development ESB version 10.1.3.3.1 Build PCBPEL_10.1.3.3.1_GENERIC_RELEASE.
     I am getting following error.
An unhandled exception has been thrown in the ESB system. The exception reported is: "org.collaxa.thirdparty.apache.wsif.WSIFException: exception during SOAP invoke: Server was unable to process request. ---> Object reference not set to an instance of an object.; nested exception is: javax.xml.rpc.soap.SOAPFaultException: Server was unable to process request. ---> Object reference not set to an instance of an object. at com.collaxa.cube.ws.wsif.providers.oc4j.jaxrpc.WSIFOperation_JaxRpc.populateFaultMessage(WSIFOperation_JaxRpc.java:3086) at com.collaxa.cube.ws.wsif.providers.oc4j.jaxrpc.WSIFOperation_JaxRpc.invokeOperation(WSIFOperation_JaxRpc.java:1728) at com.collaxa.cube.ws.wsif.providers.oc4j.jaxrpc.WSIFOperation_JaxRpc.invokeRequestResponseOperation(WSIFOperation_JaxRpc.java:1473) at com.collaxa.cube.ws.wsif.providers.oc4j.jaxrpc.WSIFOperation_JaxRpc.executeRequestResponseOperation(WSIFOperation_JaxRpc.java:1196) at oracle.tip.esb.server.common.wsif.WSIFInvoker.executeOperation(WSIFInvoker.java:867) at oracle.tip.esb.server.common.wsif.WSIFInvoker.nextService(WSIFInvoker.java:770) at oracle.tip.esb.server.common.wsif.WSIFInvoker.nextService(WSIFInvoker.java:790) at oracle.tip.esb.server.service.impl.outadapter.OutboundAdapterService.nextService(OutboundAdapterService.java:208) at oracle.tip.esb.server.service.impl.outadapter.OutboundAdapterService.processBusinessEvent(OutboundAdapterService.java:127) at oracle.tip.esb.server.dispatch.InitialEventDispatcher.dispatchNonRoutingService(InitialEventDispatcher.java:118) at oracle.tip.esb.server.dispatch.InitialEventDispatcher.dispatch(InitialEventDispatcher.java:95) at oracle.tip.esb.server.dispatch.BusinessEvent.raise(BusinessEvent.java:1424) at oracle.tip.esb.utils.EventUtils.raiseBusinessEvent(EventUtils.java:112) at oracle.tip.esb.server.service.EsbRouterSubscription.onBusinessEvent(EsbRouterSubscription.java:307) at oracle.tip.esb.server.dispatch.EventDispatcher.executeSubscription(EventDispat
     Could one of you please help me out to understand why it is happining.
Thanks in advance.
Jyotirmoy.

Hi Mahesh,
One you are missing is authentication token or credentials.
Please refer to the following articles.
http://www.cleverworkarounds.com/2014/02/05/tips-for-using-spd-workflows-to-talk-to-3rd-party-web-services/
A Series of articles related to Web Service in SPD Workflow
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 1
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 2
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 3
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 4
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 5
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 6
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 7
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 8
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 9
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 10
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 11
Trials or tribulation?
Inside SharePoint 2013 workflows–Part 12
Please don't forget to mark it answered, if your problem resolved or helpful

How to handle large result set of a SQL query

Hi,
I have a question about how to handle large result set of a SQL query.
My query returns more than a million records. However, the Query Template has a "row count" parameter. If I don't specify it, it by default returns only 100 lines of records in the query result. If I specify it, then it's limited to a specific number.
Is there any way to get around of this row count issue? I don't want any restriction on the number of records returned by a query.
Thanks a lot!

No human can manage that much data...in a grid, a chart, or a direct-connected link to the brain.
What you want to implement (much like other customers with similar requirements) is a drill-in and filtering model that helps the user identify and zoom in on data of relevance, not forcing them to scroll through thousands or millions of records.
You can also use a time-based paging model so that you only deal with a time "slice" at one request (e.g. an hour, day, etc...) and provide a scrolling window. This is commonly how large datasets are also dealt with in applications.
I would suggest describing your application in more detail, and we can offer design recommendations and ideas.
- Rick

ABAP Web Service with tables

Hello,
 
 
We need to build a web service with a predefined message in our ERP (ABAP), without PI or WebAS JAVA.
 
 
We thought it should be a simple task, because we had no problem with many other applications and systems when building the same service, but were not able to build it with SAP ABAP, probably as a consequence of our lack of knowledge on ABAP SOAP runtime.
 
 
We have an external asynchronous process that delivers information to many other systems using web services (information diffusion). Concecuently, the web service call's structure is determined by the caller, so we have to fulfill this structure if we want to receive the info.
 
 
The owner of the process defined a very simple service call, in which one kind of "record" can be repeated 1 to n times:
 
 
 
 
 
 
<reglasSuscripcion>
 
 <!Zero or more repetitions:>
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
</reglasSuscripcion>
 
 
 
In order to receive this info, we have to implement an abap web service handler to accept this kind of call, the same way other applications/systems have already done.
 
 
We tried to build a RFC function call and create a web service with the wizard and it resulted in a web service with the following WSDL:
 
 
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:sap-com:document:sap:soap:functions:mc-style">
 
 
 
 
 <reglasSuscripcion>
 
 <!Zero or more repetitions:>
 
 <item>
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
 </item>
 
 
 
 
<item>
 
 <nombre>?</nombre>
 
 <valor>?</valor>
 
 </item>
 
 </reglasSuscripcion>
 
 
 
 
We found two main problems:
 
 
1.- When "wrapping" the RFC as a WS with the wizard, for a table datatype it automatically includes the <item></item> tag, so we break the predefined calling rules.
 
 
2.- The namespace is fixed by the wizard, and we would like to use a common namespace for all the "susbscribers", logically, the namespace fixed by the information diffusion service.
 
 
We also tried to find info on the outside-in approach for building a web service from the WSDL, but all the info we found required the ESR and we have no PI, just the ERP.
 
 
Any ideas on how to proceed?
 
 
Thanks in advance,
 
 
Joseba M. Iturbe
 
 
Edited by: Soporte Desarrollo on Mar 5, 2010 10:56 AM

#2. I've recently had to "zap" some namespaces in an ECC5 system because the calling (TIBCO) system didn't appreciate the default SAP "urn" default - something to do with multiple colons in the address. There were, I think, just three table this affected, all VEP* ones. I think I should have been able to change these via the virtual interface in SE80 except that the ECC5 code was a bit "light" in this respect, so you may be able to do this now in SOAMANAGER in ECC6 (btw, I also had to re-save the WS definition within WSCONFIG and re-activate the virtual interfaces after this "zap" to generated the associated handler class again).
#1. Given your "name / value" pairs represent a complex type, then it might be better practice to have them as "item" which is probably why SAP proposes it this way... what does your custom function module parameter list look like?
Jonathan

Use web service with overloaded method

Hi all,
Does anyone knows how can I use (e.g in VC or GP) a web service with overloaded methods?
When I try to use one, I get the following error message:
com.sap.engine.services.webservices.jaxrpc.exceptions.ProxyGeneratorException: Proxy Generator Error. WSDL Operation with name [search] is overloaded (defined twice). Operation overloading is not supported by proxy generator.
Can I set something in order to be able to use such type of services. Or some other solution?
For some reasons I do not want to change the service operation names.
Thanks in advance!
Best regards,
v s

Hi all,
Does anyone knows how can I use (e.g in VC or GP) a web service with overloaded methods?
When I try to use one, I get the following error message:
com.sap.engine.services.webservices.jaxrpc.exceptions.ProxyGeneratorException: Proxy Generator Error. WSDL Operation with name [search] is overloaded (defined twice). Operation overloading is not supported by proxy generator.
Can I set something in order to be able to use such type of services. Or some other solution?
For some reasons I do not want to change the service operation names.
Thanks in advance!
Best regards,
v s

Call ABAP Web Service with Java code only

Hi all,
First of all, I am writing script in Adobe form but am not using the one in SAP.
I am trying to call the web service and process the result with script open (i.e. no dataconnection created), because I am trying to do that in a dialog.
I can call a non-SAP web service without problem, but I am not able to call a simple web service with only a single string input, anyone have any example?
Here is the SOAP for input:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:urn="urn:sap-com:document:sap:rfc:functions">
 <soapenv:Header/>
 <soapenv:Body>
 <urn:Z_RFC_GET_STAFF_BANK_INFO>
 <A_STAFF_ID>0123456</A_STAFF_ID>
 </urn:Z_RFC_GET_STAFF_BANK_INFO>
 </soapenv:Body>
</soapenv:Envelope>
Here is my code to call:
 var cURL = "http://some-host-name:port/sap/bc/srt/wsdl/bndg_DEDB492BB032E7F1B09F001CC4FBCEC9/wsdl11/allinone/ws_policy/document?sap-client=300";
 var response = SOAP.request(
 cURL: cURL,
 oRequest: {
 "urn:sap-com:document:sap:rfc:functions:Z_RFC_GET_STAFF_BANK_INFO": {
 A_STAFF_ID: "0123456"
Regards
Bill

Hello I have the same problem, were you able to execute the WS through the JS code now?
I would like to call an ABAP WS using JavaScript to return complex structures that I would like to manage directly with JS.
I tried with this code and I get the error "RaiseError: Acrobat Raise." when the request is executed:
var WSUrl = "http://<server>:<port>/sap/bc/srt/wsdl/bndg_4D15C75529330AF1E10000000A150429/wsdl11/allinone/ws_policy/document?sap-client=500";
var VendorNumber = xfa.form.DATA.DATAFLOW.SF_HEADER.VENDOR_NUMBER.rawValue;
try {
// Create request structure, read Input out of text field
var request = {
 "urn:sap-com:document:sap:soap:functions:mc-style:ZWsTest" : {ILifnr: VendorNumber}
SOAP.wireDump = true;
// Call web service using SOAP object
var response = SOAP.request ({
 cURL: WSUrl,
 oRequest: request
// cAction: "urn:sap-com:document:sap:soap:functions:mc-style"
} catch (e) {
 xfa.host.messageBox(e.toString()); //pop-up "TypeError:service.CelsiusToFahrenheit is not a funciton"
with this other code I get the error "SOAPError: CX_ST_MATCH_ELEMENT:XSLT exception.System expected element 'ILifnr'":
try {
 var myProxy = SOAP.connect(WSUrl);
 var result = myProxy.ZWsTest( { ILifnr: VendorNumber } );
 xfa.form.DATA.DATAFLOW.SF_HEADER.E_DESCRIPTION.rawValue = result;
// Display the response in the console:
 console.println("Result is " + result);
} catch (e) {
 xfa.host.messageBox(e.toString()); //pop-up "TypeError:service.CelsiusToFahrenheit is not a funciton"
in the second option, if I make the field ILifnr optional the call is succesfully performed but the parameter is not passed to the WS. So the call is working.
Using stand-alone LiveCycle designer 8.1 and Adobe Reader 8
Any suggestions?
Many thanks,
G.
Edited by: Guillem Mateu Navalón on Jan 13, 2011 1:13 PM

How to use web services with Dynamic url behaviour

Hi,
IView created by me currently uses some web services whose url behavior is static but i want to give a dynamic url behavior. i.e. i want to use the url which user provides. So here are my questions
1. How I shall assign the url supplied by the user to IView?
2. If I want to set some config variables during runtimes how I shall do it?
Thanks in advance,
Vishvesh

Hi,
1. I'm guessing you mean the webservice's url the user provides is pointing to an identical webservice to what you used to create your proxy... otherwise I think it will be very hard to do (I can imagine creating the proxies using the wsdl tool in run time or using code dome.. but that can't be what you want, right?).
So if what you wanted is to use the same web service with a different url, then the web service's proxy class you created has API for doing this in code! (it inherits it)
2. you can't, simply since the portal application doesn't ever use the config file... it isn't even deployed to the portal... so dynamic properties are "out of the question" here, sorry... see 1 again
Regards,
Ofer

Web Services with Large Result Sets

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