How Web Services support transactions ?

Hello,
I have this questions:
- Web services support statefull?
- There is some specification about 2PhaseCommit for Web Services?
- How Web services handle transactions (commit, rollback)?
- How can I handle commit across multiple systems (using web services)?
There are standards that support this topics?
Best regards,
Luis Carlos

Yes and no. <a href="http://www.w3.org/Protocols/rfc2109/rfc2109.txt">rfc2109</a> . This means that cookies provide a kind of session and therefore state, which can be hold on server side.
SAP ABAP ERP holds session:
<a href="http://help.sap.com/saphelp_erp2005/helpdata/en/b7/d7baaf1481a349ab723e3acd7334b3/frameset.htm">Providing and Consuming Web Services</a>
"WSDLs - There are two kinds of WSDLs Standard and SAP WSDL. The standard WSDL is provided for those users who will use tools from other vendors to create clients. For SAP users, there is an extended SAP WSDL. This is an extended version of WSDL and can be parsed using SAP tools (SAP Proxy Generator), thus providing information about additional Web service requirements such as authentication, session, and so on."
for me is also the technical implementation - how is the webservice session managed on server and on client - not totally clear. If someone can help me to find exaxct technical details. Unfortenately I also always used it (esp. with Web Dynpro) without thinking about details.

Similar Messages

How web services support SAP transactions

Hi ,
How does webservices technology support SAP t-codes?
Regards
Raju

Yes and no. <a href="http://www.w3.org/Protocols/rfc2109/rfc2109.txt">rfc2109</a> . This means that cookies provide a kind of session and therefore state, which can be hold on server side.
SAP ABAP ERP holds session:
<a href="http://help.sap.com/saphelp_erp2005/helpdata/en/b7/d7baaf1481a349ab723e3acd7334b3/frameset.htm">Providing and Consuming Web Services</a>
"WSDLs - There are two kinds of WSDLs Standard and SAP WSDL. The standard WSDL is provided for those users who will use tools from other vendors to create clients. For SAP users, there is an extended SAP WSDL. This is an extended version of WSDL and can be parsed using SAP tools (SAP Proxy Generator), thus providing information about additional Web service requirements such as authentication, session, and so on."
for me is also the technical implementation - how is the webservice session managed on server and on client - not totally clear. If someone can help me to find exaxct technical details. Unfortenately I also always used it (esp. with Web Dynpro) without thinking about details.

Does web service support all the properties in the standalone BI console?

Hi,
Currently I am using BI web service API to get the report and its parameters and so on. But I find that the object definition in the web service can't be full defined to match the properties in the console UI. For exaple, ReportDefinition object there is no description property, so I can't get the desc by the ReportDefinition object (By now I don't know how to get it). Another sample is, there is no Parameter object defined in the web service, only ParamNameValue object, so I can't get the default value for the parameter defined in the console UI.
Is there any solution for me?
HELP!!!

It is just not working for me. I am using static stub.
After tracking the HTTP traffic, I found that the WL70 server is not issuing any
cookie. I have configured all the parameters for tracking session in the web application,
but I still don't see any cookie in the HTTP headers from the server. I also tried
to invoke the service using a browser, still no cookie seen. Is this a bug or
there is some other configuration for the server?
- Hao
"manoj cheenath" <[email protected]> wrote:
By default client will maintain the session. You dont have to set this
property.
Are you using static or dyn client?
Also, you should use the same instance of the stub for all your invokes
(all invokes to be in the same session).
regards,
-manoj
"Hao Chen" <[email protected]> wrote in message
news:[email protected]..
It is not working for me.
When I set the "javax.xml.rpc.session.maintain" property, weblogicthrows
"UnsupportedOperation"
exception and be default I don't see any session information beingpassed.
How do I configure the client side or even the server?
Thanks.
- Hao
"manoj cheenath" <[email protected]> wrote:
WL70 client does support http session. Is this not
working for you?
regards,
-manoj
"Hao Chen" <[email protected]> wrote in message
news:3d6402ac$[email protected]..
Does anybody know how to make WL70 Web Service support sessions?
The "javax.xml.rpc.session.maintain" property on Stub does not seemto
work.
Without session support, it is almost no use for us because we haveto
authenticate
the user each time.
Thanks in advance.
- Hao

Does WL70 Web Service Support Sessions?

Does anybody know how to make WL70 Web Service support sessions?
The "javax.xml.rpc.session.maintain" property on Stub does not seem to work.
Without session support, it is almost no use for us because we have to authenticate
the user each time.
Thanks in advance.
- Hao

It is just not working for me. I am using static stub.
After tracking the HTTP traffic, I found that the WL70 server is not issuing any
cookie. I have configured all the parameters for tracking session in the web application,
but I still don't see any cookie in the HTTP headers from the server. I also tried
to invoke the service using a browser, still no cookie seen. Is this a bug or
there is some other configuration for the server?
- Hao
"manoj cheenath" <[email protected]> wrote:
By default client will maintain the session. You dont have to set this
property.
Are you using static or dyn client?
Also, you should use the same instance of the stub for all your invokes
(all invokes to be in the same session).
regards,
-manoj
"Hao Chen" <[email protected]> wrote in message
news:[email protected]..
It is not working for me.
When I set the "javax.xml.rpc.session.maintain" property, weblogicthrows
"UnsupportedOperation"
exception and be default I don't see any session information beingpassed.
How do I configure the client side or even the server?
Thanks.
- Hao
"manoj cheenath" <[email protected]> wrote:
WL70 client does support http session. Is this not
working for you?
regards,
-manoj
"Hao Chen" <[email protected]> wrote in message
news:3d6402ac$[email protected]..
Does anybody know how to make WL70 Web Service support sessions?
The "javax.xml.rpc.session.maintain" property on Stub does not seemto
work.
Without session support, it is almost no use for us because we haveto
authenticate
the user each time.
Thanks in advance.
- Hao

Web Services support for collection like ArrayList

Getting this error message:
"<Info> Did not find property empty in java.util.ArrayList:
java.lang.NullPointerException"
Are collections like ArrayList supported or am I trying to do something that
can't be done? Any suggestions?
Thanks
Danny

Hi Danny,
Betcha thought I forgot 'bout cha, huh?
I didn't ;-)
The short answer to your question is no; WLS 6.1 does not support using any of
the classes in java.util.*. However, it does support Object arrays as an element
of an Object array, which means you can have code in you service implementation
that looks like this:
public Object[] getNestedObjects()
     Object[] objects = new Object[2];
     objects[0] = new Object[]{
          new String("23.76"),
          new Float((float)23.76)
     // Here, WorkOrder is a JavaBean or an object
     // that implements weblogic.soap.xml.XMLizable
     WorkOrder[] workOrders = new WorkOrder[]{
                    new WorkOrder(),
                    new WorkOrder(),
                    new WorkOrder()
     objects[1] = new Object[]{
          new String("My name is"),
          new String("Slim Shady"),
          workOrders
     return objects;
The main issue I see with doing this is again, interoperability ;-)
If the SOAP toolkit consuming the WSDL for the web service with the above method
cannot handle the "xsd:anyType" XML Schema data type, you're in trouble. In general,
SOAP toolkits want to know what type an element is so they can process it correctly.
When you use a Variant data type (in Visual Basic) or java.lang.Object (in Java),
you are basically promoting the use of weak data typing (or late binding). From
what I've read about SOAP (well, actually what Don Box said he had in mind), XML
Schema and namespaces were adopted to combat this very thing- weak or no data
typing. Personally, I agree ;-) I think strong data typing makes processing a
SOAP request much easier and faster, for everyone. Don't get me wrong, I don't
have anything against object casting, but SOAP parameters (and return values)
are not objects. They are XML elements, just like the other parts of the SOAP
message. There is no behavior, just state. This being the case, isn't it safer
to stick with the data types (e.g. arrays, structures, primitives, etc.) defined
in the SOAP spec and "XML Schema Part 2: Datatypes" document? Enough SOAP boxing
(pun intended). If you are interested in the "complexTypes" object graphs (using
developer defined classes that implement weblogic.soap.xml.XMLizable) lab results,
I can send you a zip. The biggest difference between using JavaBeans and objects
that implement weblogic.soap.xml.XMLizable, is that you have much more control
over which Java objects the later gets serialized/deserialized to/from. With classes
that implement weblogic.soap.xml.XMLizable, the SOAP processor passes you the
actual XML stream for the SOAP parameter (which in this case, is your developer
defined class). It (the SOAP processor) also calls your developer defined class
to get an XML representation for it's data types. It works great with Java clients
(using the client.jar, of course), and I'm trying it out with .NET and MS SOAP
clients this weekend. The most interesting revelation was figuring out how wsgen
(well, actually the WSDL processor) generates the information in the <types> element
of the WSDL ;-) I actually even know how to code an XMLizable so that it produces
the exact element and attribute names I want. I also figure out how to get it
to produce an <element ...>, as opposed to a <attribute ...>, and visa versa.
Of course, WLS 7.0 (and WebLogic Workshop) make all of this a moot point, but
it was fun to get the SOAP/WSDL processors in WLS 6.1 to "do my bidding" for a
short while ;-)
Regards,
Mike Wooten
"Danny Ngo" <[email protected]> wrote:
>
Hi Mike,
Thank you for your response. Do you know if WLS 6.1 Web Services support
the
return of nested object array (object that contains other object arrays).
Thanks
-Danny
"Michael Wooten" <[email protected]> wrote:
Hi Danny,
For interoperability (with non-Java SOAP implementations)reasons, the
Java collections
are not supported in WLS 6.1 ;-) You should consider using an arrayin
place of
this.
Regards,
Mike Wooten
Danny Ngo <[email protected]> wrote:
Getting this error message:
"<Info> Did not find property empty in java.util.ArrayList:
java.lang.NullPointerException"
Are collections like ArrayList supported or am I trying to do something
that
can't be done? Any suggestions?
Thanks
Danny

How to configure Web service using transaction SOAMANAGER?

Hi SDN,
I have followed this article to configure using transation SOAMANAGER.
http://www.sdn.sap.com/irj/scn/index?rid=/library/uuid/20b723f8-a422-2c10-aca5-fe64eeda1ff2&overridelayout=true
but I have some issues about looking for ECC_PURCHASEORDER003QR in default_host/sap/bc/srt/xip/sap of above article.
I can not configure Web service and go to steps further.
The system is ECC 6.0 release 7.
How can be done?
Thanks,
Luu,

Hi,
> but I have some issues about looking for ECC_PURCHASEORDER003QR
You mean you can't see this service in sicf or you have trouble locating this service in SICF. Can you specify what exactly your problem is?
Please check if you are on correct Ehp (Enhancement pack) required for this service. This service available with Ehp4.
To check enhancement pack goto System->status and check component information i.e. SAP_APPL release is 603 in my system which means I am on Ehp3.
Regards,
Gourav

I need help sorting out how Web services work

I'm getting pretty darn confused with all the new terms I have to learn to develop a web service.
I want to deploy a simple java based web service on an IIS/ServletExec machine. To do so the documentation says I have to instal WSDP on the machine. Within a few seconds I get stuck.
When I try to install wsdp 1.6 it asks for a web container. I thought ServletExec is a web container, but it does not recognize it. What is a web container then? Should I just pick one of their options?
Sun Java System Application Server Platform Edition 8.1 Update 2 : What is this thingy? Doe it coem sith j2ee sdk already? If not, why?
Sun Java System Web Server 6.1 Service Pack 3 : What is this> How does it differ from the former thingy?
Tomcat 5.0 for Java WSDP 1.5 : Is this the Tomcat web app server? Does it stack on ServletExec?
I've deployed web pages on ServletExec, but am quite bewildered by the hoard of terms and tools thrown at me by the documentation for web services. What do I really need? It doesn't seem it should require much more than a jsp page would require, but I keep seeing the list of jar files and the like grow.
I need a web services for dummies that specifically deals with ServletExec and Java.
- Extremely confused

A Web container is a part of application server
i.e a web container is contained in application server.
So ServletExec already has a Web Container? All Web App Servers have a web container?
A Web Server is responsible only for web related
applications like JSP, Servlets, Web services, etc.
but an appliocation server can deploy EJB's also.
I thought the Web Server managed html and passed JSPs, Servlets, and Web Services on to the Web App Server. (With the exception of .NET type applications which run entirely on the front end Web Server). At least that is how we have our machine configured.
IIS, the Web Server, runs on a machine outside the firewall. It serves up all static html pages. All references to dynamic html (JSPs and Servlets) are forwarded to a Servlet Exec instance, the Web App Server, on a machine behind the firewall.
IIS can not process Web Services outside a .NET-type configuration. The documentation has led me to believe that I have to deploy a Java web service on a Web App Server like ServletExec.
>
Sun Java System Application Server Platform Edition 8.1 Update 2
is an application server provided by sun.
But the installation called it a web container. You just called it an applciation server. But you also said earlier that an applciation server is not a web container, but rather contains a web container. Should they have called it an applciation server.
(Just to make sure - application server = web app server, right?)
You can download bundle which contains j2eesdk
and application server together or you can download
seperately. Both these options are available on Sun's website.
I do believe ServletExec comes with j2eesdk, as I was able to run servlets without installing it. Though I did install jdk 1.5 and use it as my virtual machine when running Java, including any servlets.
Sun Java System Web Server 6.1 is responsible only
for web related applications like JSP, Servlets, Web services
etc but Sun application server 8.2 can deploy EJB's also.
So Web Server 6.1 is a front end web server which also serves up JSPs without having to call an application server? You only need an application server if you want to do EJBs?
Tomcat 5.0 for Java WSDP 1.5 : Is this the Tomcat web app server?WSDP containts several library files and other files
which are necessary for running a web service.
( lib files for sending and recieving SOAP request and
response i.e mail.jar activation.jar, saaj .jar ....etc).
It is not an application server. It acts as a supportive
role for creating and deploying web services.
That's what I thought. But I also thought Tomcat 5.0 IS a web app server (wheras Apache is the Web Server). It says "Tomcat 5.0 for Java WSDP 1.5" which does not make sense to me. Iwould think it would say "Java WSDP 1.5 for Tomcat 5.0" instead. What exaclty are they offering to download? WSDP or Tomcat? And if Tomcat, why are they calling it a web container when it is an application server? WSDP is not a web container, right? just some lib files for supporting web services.
Regards,
Piyush- still quite confused but grateful for your comments

Exception in transaction commit when using Web Service Atomic Transaction

Hi all,
I am following this tutorial from Oracle on how to use WS-AT
http://docs.oracle.com/cd/E14571_01/web.1111/e13734/transaction.htm
A brief description about my application, which is wrote in JDeveloper:
Two applications, one for web service and one for client.
The WS is backed by an stateless EJB, which use JPA entity to do operations on the Oracle XE DB. The EJB transaction is container-managed, and the Entity Manager is retrieved from the JTA Datasource by using @PersistenceContext
I put this on the EJB implementation class:
@WebService(...)
@TransactionAttribute(value = TransactionAttributeType.MANDATORY)
@Transactional(version = Transactional.Version.WSAT10,
value = Transactional.TransactionFlowType.MANDATORY)
On the client application, I use another EJB to call the WS. The proxy and all generated types are created properly by JDev. I put this on the @WebServiceReference point in the client EJB:
@Transactional(version = Transactional.Version.WSAT10,
value = Transactional.TransactionFlowType.MANDATORY)
The client EJB is also annotated with:
@TransactionAttribute(value = TransactionAttributeType.REQUIRED)
Both applications are deployed successfully in the integrated weblogic server. But when I run the method in the client EJB that call the WS to do a persisting operation on the DB, the following exception is thrown:
javax.ejb.EJBException: BEA1-00227DF3AF249E472B1E: javax.transaction.xa.XAException: Failed state during prepare of WS-AT XAResource ...
which causes:
Exception occurred during commit of transaction Name=[EJB +_the client EJB's calling method_+
The weird thing is, if I call a method which does a simple System.out.println (no DB related operation) then no exception is thrown.
Furthermore, if I switch both WS EJB and client EJB to use bean managed transaction, the transaction is not propagated properly, as I see that UserTransaction in the WS EJB does not have the same status as UserTransaction in the Client EJB.
Hence I'm suspecting that there is some issue during step 4 described in the Oracle documentation:
"Server B receives the request for Application B, detects that the header contains a transaction coordination context and determines whether it has already registered as a participant in this transaction. If it has, that transaction is resumed and if not, a new transaction is started.
*Application B executes within the context of the imported transaction. All transactional resources with which the application interacts are enlisted with this imported transaction*."
This is all I can find. Please help me on how to resolve the exception.
Thanks.

Hi r035198x,
Thanks for your help. The problem indeed is in the non-XA datasource I used for the EntityManager. I created datasource what uses XA Thin Oracle driver and everything works fine now, commit and rollback both work nicely.
Again thanks a lot.

Web Services and transactions

How can an Web Service invocation be bound into an existing transaction (e.g. if called from a session bean the Web Service will commit/rollback with the session bean)?
thanks,
d

How can an Web Service invocation be bound into an existing transaction (e.g. if called from a session bean the Web Service will commit/rollback with the session bean)?
thanks,
d

Web Service Support

Hi,
I was wondering if the web service wsdl import and class generation supports all the different types of encodings (RPC, Document Literal,etc..).
I am getting a null being returned...I was wondering if there is a way to get the actual soap response or to output it in some way...to see whats going wrong.
Thanks,
Ashish

Hi,
I was wondering if the web service wsdl import and
class generation supports all the different types of
encodings (RPC, Document Literal,etc..).Please see the JAX-RPC spec at http://java.sun.com/xml/downloads/jaxrpc.html for a complete explanation of the types of encodings supported.
>
I am getting a null being returned...I was wondering
if there is a way to get the actual soap response or
to output it in some way...to see whats going wrong.Have you checked the deployment server log? From the server navigator, on the localhost:4848 node, choose "View Server Log" from the context menu.
- David

Web Service Support for WebLogic

Add Support for Web Services to WebLogic using IONA's XMLBus
For anyone interested in Web services, IONA has just released a free
technology preview of iPortal XMLBus, with support for BEA WebLogic 6.0
patch 1. You can download it today from www.xmlbus.com, a Web site entirely
dedicated to Web services.
The iPortal XMLBus Technology Preview enables Java Developers to turn
existing EJBs and Java Applications into Web services. XMLBus is 100% pure
Java and installs seamlessly on top of the
WebLogic. It implements the W3C v1.1 draft specifications of SOAP and WSDL.
SOAP is the communication protocol used by Web services to traverse over
HTTP, SNMP, and FTP. WSDL has become the standard for describing Web service
interfaces in XML.
XMLBus automates the process of turning Java classes into Web services,
ensuring that Java developers do not need to learn a whole new programming
language to turn existing applications into Web services.
Wizards guide the developer through the identification of interfaces and
methods the developer wants to become a Web service. The wizard deploys a
SOAP Listener and a WSDL interface for that Java Class, as well as Java
client proxy applications. The client proxy can easily be incorporated into
any Java Application to invoke the corresponding methods described in the
WSDL.
Download a free copy of the iPortal XMLBus Technology Preview from:
http://www.xmlbus.com/work/
Post Questions to the XMLBus Newsgroup:
news://inews.iona.com/iona.products.xmlbus
For more information on SOAP or WSDL, reference: http://www.xmlbus.com/learn
thanks
becky
Rebecca Dias
Technical Product Manager
IONA Technologies
http://www.iona.com
http://www.xmlbus.com
Mailto:[email protected]

This is fixed now. Someone had defined a Servlet for the web service in web.xml that was preventing the EJB container to kick in.
Edited by: user572625 on Aug 25, 2011 11:54 PM

WCF Web Service Support

Does Xcelsius support Microsoft Windows Communication Foundation Web Services? I've downloaded the trail version of Xcelsius Engage 2008 and when I try to load a WCF WSDL I get an error message stating Unable to Load.
Thanks in advance,

Hi Zhong,
       Thanks you for your reply and shared link. I have read that post before i post here. I'll read again.
       I do understand on "PreAuthenticate" like this. I'll be receive 401 first request if i set "PreAuthenticate=true". Because i haven't pass authentication to server. After authentication is successful
I'll receive 200. So response should be like 401,401,200. Same as your explanation to me.
But it does not mean it'll send the authentication information the first time HttpWebRequest send request to the server. So the server will give you a 401 response at the first request, then the HttpWebRequest will resend the request with the Authentication header information.
In the subsequent requests, the authentication information will be cached.
But why i got 401 again after i passed authentication to server and server already cached the authentication. It should be
401,401,200,200.
Now i got 401,401,200,401,200. I confuse on this part.
If i use below code
// Below is work but i can't use for my requirement.
_Cred = new NetworkCredential("user", "password", "domain");
credCache.Add(new Uri(url), "Negotiate",
_Cred);
req = (HttpWebRequest)WebRequest.Create(url);
req.PreAuthenticate = true;
req.Credentials = credCache;
resp = req.GetResponse();
if (req.HaveResponse)
resp.Close();
req = HttpWebRequest.Create(url) as HttpWebRequest;
req.PreAuthenticate = true;
req.Credentials = credCache;
resp = req.GetResponse();
if (req.HaveResponse)
resp.Close();
I'll get 401,401,200,200. Third time response is 200. Only different is user name and password and DefaultNetworkCredentials.
   Am i misunderstand on this? I appreciate your help.
Regards,
Yukon
Make Simple & Easy

Asynchronous web services support?

Hi all
Please advice is async web service calls are supported in siebel crm on demand. Is web services are configurable through admin interface to support asynchronous?
Thank you.

Any Information on Asynchronous Web Services request???

Integration Web Service Support?

Does the new Integration 7.0 BPM have web service/SOAP support?
In particular, I would like to start my workflow from a web service call, or be
able to call web services directly from tasks in my workflow. Can this be done?
Please advise,
Dave

No it does not. You have two choices. There is a alpha plug-in available to call
web services from a node task. It is for Integration 2.0. I have not been able
to run it against 7.0. The other option is to utilize workshop. There is a sample
on dev2dev. Search for integration interoperability.
"David Mrozek" <[email protected]> wrote:
>
Does the new Integration 7.0 BPM have web service/SOAP support?
In particular, I would like to start my workflow from a web service call,
or be
able to call web services directly from tasks in my workflow. Can this
be done?
Please advise,
Dave

Web service - Support package

Hi,
Our scenario is based on ECC 6.0 sp12: soon many web service wil be created on that system.
For this purpose an installation of suport package 14 is sufficient (to get not obsole platform)? Instead it is better for us support package above or enhancement package?
we do not know if we will use Composition Environment with ESR and SR.
Thanks.

Hi,
Enabling ECC with Enterprise Services is very tedious task and SAP is doing it for you by releasing new Enhancement Packs, so with every Ehp you get set of new services and improved features (for list of services visit here (available in pdf): http://help.sap.com/content/documentation/esoa/docu_esoa_erp.htm)
If you don't want standard SAP services then you can always develop them by your own (but you must adhere to strict SOA governance to avoid SOA chaos). To develop custom build service there are two ways:
- Bottom up: build RFC first and then convert it into services (not recommended)
- Top down: you need ESR to model services and then you can develop those services in ECC.
For your query on another thread:
'check if you are on Ehp3 else only definition of service exist (no actual service exist on ECC), Secondly you can't edit standard provider class from SAP you must create copy of service and then enhance'
I can not do the same thing with ECC sp14 with Composition Environment include ESR?
ESR = Only definition of services (skeleton only)
ECC = Actual implementation of service.
Sometime people can see service in ESR but they wonder why they are not able to use it in ECC, to be able to use them in ECC you must have corresponding Enhancement pack installed on ECC.
Regards,
Gourav

How Web Services support transactions ?

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