Web services and entity beans

Hi,
I want to implement a web service which stores some information.
I decided to bulid it using ejb.
Can i expose a web service as an entity bean?
If so,can anybody introduce me some example?
If not,what is the solution?

Yes, u can do that by creating EJB controls first and then add that EJB control to WebService.
Which Editor is using . if u r using Weblogic Workshop 8.1
Creat project and then just right click and create EJB Control for that and then add this to web Service
If u wanna any other information reply ..

Similar Messages

Need advice about web services and Java beans

Hi
I am very new to web services and to Java beans as well.
I am trying to understand if and how a web service can use functionality I have in a Java bean. I couldn't find any documentation I can use.
For example:
InitialContext ic = new InitialContext();
Adder adder = (Adder) ic.lookup("ejb/AdderJNDI");In a EJB client project (I'm working with Eclipse) if I add the EJB project to the build path, the Adder interface is recognized.
Theoritacally I thought I can do the same in a web service server project, but the Adder interface is not recognized.
Is there something I can read to understand how I need to use the EJB or implement the web service?
Many thanks
Sigal

Okay....I think I made some errors with the original scenario:
It basically comes down to this....I think. OCS Calendar has a set of Java classes and methods that provide an abstraction for their web services interface. I know how to create something to use these classes using an IDE like JDeveloper, but I'm not sure how that would work with HTML DB.
I've noticed that the SQL Workshop has a place for Java sources and classes, and I've heard mentions of PL/SQL wrapping. Is there a way to import classes into an HTML DB workspace, wrap 'em up, and access them via PL/SQL?
Thanks again,
Jonathan

Create a web service from java bean and map exceptions to SOAP faults

Hi,
We have to expose our Session stateless EJB3 as web services. I've tried to use annotations and jdev wizard "java bean to web service" and it works fine.
Our problem now is that our methods can throw a business exception that contains a list of error message strings to be presented on the client.
I did not find any way to use annotations to make it build a wsdl with soap fault mapped to our exception class. Neither I could to make the wizard to create wsdl with faults.
As we are exposing already designed and implemented classes as web services, I think the bottom-top (java->wsdl) approach is better that top->botton (wsdl->java). Therefore, I'm looking for a possibility to generate the web services from the java beans and have the exception be mapped to a soap fault message.
We are using jdev 10.1.3.1 and OAS 10.1.3.1., is there a way to map exceptions to soap faults using bottom->top approach?
thank you

A couple of links that may be of help:
http://www.netbeans.org/servlets/ReadMsg?listName=nbj2ee&msgNo=1218
My last question concerning web services:
I have already written a session bean and I'd like to add some methods
as a web service to it, how do I do that?
Or I can only create another bean for a webservice and cannot modify the
original one?You might create web service with existing sources and select you bean. New web services with appropriate lookup method will be generated.
All web service method, that will be exposed in web service, you
should add itself (Pop-up menu Web Service -> Add operation)
http://usersguide.netbeans.org/files/documents/40/73/Chapter9-WebServices.pdf

Quick questions on the topic of Web Services and EJB POJOs

I have been reading about Web Services and the data types that are aloud as operation parameters and return types. I was wondering what the standard practice for return types; is it to use the Entity classes straight and customize the WSDL instead of letting the EE container do it (avoid cyclic problems in the schema that can occur when using entity 1-to-many and many-to-1 mappings) or; is it to off load the data into a DTO/VO/Bean and let the EE container take care of all the schema mapping for the WSDL? I look at the EE tutorial and bought a EE book both use very basic examples that do not include connecting to a database or using EJB3 for the data store.
Thanks for any information

bump

Java app with web service and servlets

Hi. I intend to make a java application which exposes some methods as a web service and as jsp/servlets. It's core functionality is not really web centric, but its more a java app with a web tier. I am not sure about how the architecture of such a system would look like using the java platform. I currently see three options:
1. Run everything in a servlet container like tomcat. I hesitate to do this because i would be putting a lot of functionality which isn't about the web into a servlet container. Also, I have a lot of application scope data that is maintained and shared by all servlets/web services. However, it would be really easy just to put everything into tomcat and use ServletContext to maintain some global objects.
2. Use a Java EE to seperate application/business logic and data access into session beans and entity beans. I hesitate to this because it seem a bit overkill because the system isn't very big or complex right now. It also means that I would have to learn to use EJB's instead of just using some POJOs.
3. Run the web tier in a servlet container and the main app in a separate JVM, and then connect the tier by sending serialized objects over TCP sockets. I don't like writing network code but at least there is some separation of the tiers.
What would you do? Maybe I have overlooked a much better solution to the problem?
Let me just say that the system is the product of a student project spanning one semester, so it's important to choose the RIGHT solution (architectural-wise) instead of the something quick and dirty that is hard to defend.

jschell wrote:
Run everything in a servlet container like tomcatTomcat is a JEE container.Now I am confused. Maybe you mean Glassfish? Tomcat is definitely a web container(?).
Let me just say that the system is the product of a student project spanning one semester, so it's important to choose the RIGHT solution (architectural-wise) That pretty much makes it impossible then.
1. A "Right" solution is generally only proven by time.
2. It requires a great deal of knowledge about the business domain.Yeah, you are right. Let be try to rephrase it. What solution (pattern) would be considered the most common or appropriate when you have a Java App and want to expose a few methods as a website and web service?
I hesitate to do this because i would be putting a lot of functionality which isn't about the web into a servlet container. Also, I have a lot of application scope data that is maintained and shared by all servlets/web servicesHuh? Do you already have an exposed web service? If you already have a server which other clients communicate then where does this functionality that you don't want to be tomcat running now? Or where do you think that you want to run it? And if you are or do run it somewhere else then tomcat could access it the same way any other client accesses that server.Sorry, that sentence was written badly. I don't have anything right now. What I meant to write was that I will have a lot of application scope data, objects that are kept in memory as long as the server is running, shared by multiple servlet instances.

Web services and EJB3 @resource annotation

This block of code works fine when NetworkViewBean is left as a @Stateless session bean.
Once I have JDeveloper 10.1.3 production expose it as a web service, I can no longer call the Entity Manager @Resource.
I always get a java.lang.NullPointerException returned.
Any ideas?? thanks for your help!
@WebService(name = "NetworkViewWS", serviceName = "NetworkViewWS")
public class NetworkViewBean {
@Resource
private EntityManager em;
public NetworkViewBean() { }
public String getDeviceVendorModel(String name) {
if (name == null || name.length()== 0) return "Null Input Parameter Specified";
NetDevice N= null;
try {
N= (NetDevice)em.createNamedQuery("findByDeviceName").setParameter(0, name).getSingleResult();
catch(Exception E) { E.printStackTrace(); return null; }
return "Vendor= "+ N.getVendor()+ ", Model= "+ N.getModelNumber();

Hi Joshua,
The problem is that you are using a regular Java web service and in 10.1.3.0.0 we do not have support for dependency injection in the container in the web container i.e. you cannot use annotations such as EJB, Resource in any classes in the web container.
You have two options:
1. Lookup an EJB from regular Java web service (JSR-181)
or
2. Make your Web service as a EJB 3.0 web service
Here what you can do to create an EJB 3.0 web service from JDev
1. Create an EJB 3.0 Session bean with remote interface
2. Change your remote interface to a web service end-point change @Remote to @WebService (import javax.jws.WebService)
3. You do not have to use @WebMethod, we automatically expose all methods in the end-point interface in the web service
4. You can inject EJB using @EJB
5. Create a deployment profile for the EJB-jar and deploy the ejb-jar and the EJB will be exposed as a web service. The context-uri for the web service will be /ejb-jarName
Hope this helps!
-Debu Panda
OC4J Product Management
blog: http://debupanda.com
-Debu

Pl/Sql web service and collections not working

Hello
I'm trying to create a web service from a function in a package which returns a collection. The creation of the web service and its deployment seem to work correctly. I do get the following warning :
WARNING: OWS-00077 The Value Type class: pxWsLang.PamLanguagerecordBase does not have a valid JAVA Bean pattern
but I don't think this is the source of the problem.
When I try to test the web service using the endpoint in the wsdl I get the following answer in the browser:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"><env:Header/><env:Body><env:Fault xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"><faultcode>env:Server</faultcode><faultstring>Error creating target: pxWsLang.WsLangUser</faultstring><faultactor></faultactor></env:Fault></env:Body></env:Envelope>
In the DOS window for the OC4J I get the following error :
2006-11-15 09:21:25.852 ERROR OWS-04005 An error occurred for port: {http://pxWs
Lang/WsLang.wsdl}wsLangSoapHttpPort: javax.xml.rpc.JAXRPCException: Error creati
ng target: pxWsLang.WsLangUser.
The PL/SQL code is as follows :
Object:
CREATE OR REPLACE TYPE PAM_LanguageRecord as OBJECT
NR NUMBER(3),
SYMBOL VARCHAR2(2)
Collection:
CREATE OR REPLACE Type PAM_LanguageTable as Table of PAM_LanguageRecord;
Package body :
create or replace package body PAM_TEST is
function CursorTest return Pam_LanguageTable is
Res_LangTable PAM_LanguageTable;
cursor cur is select * from stc_languages;
begin
Res_LangTable := new PAM_LanguageTable();
for Rec in cur loop
Res_LangTable.Extend(1);
Res_LangTable(cur%ROWCOUNT) := new PAM_LanguageRecord
(Rec.NR,
Rec.SYMBOL
end loop;
Return Res_LangTable;
end;
end;
I'm using JDeveloper version 10.1.3.1.0.3984
How can I get this to work ? (without using Apache Axis or other tools :-)
Is it supposed to work ?
Many Thanks
Paul

Hi,
for the "error creating target" problem I found the solution here:
[WS from a PL/SQL package]: Error creating target
Hope this helps.
Regards,
Patrik

Diff b/w Web service and window service

What is the difference between web service and window service, whether the both are same or not, Give some explain about that each one and give some examples also.

An XML Web service is a component that implements program
logic and provides functionality for diseparate
applications. These applications use standard protocols,
such as HTTP, XML, and SOAP, to access the functionality.
XML Web services use XML-based messaging to send and
receive data, which enables heterogeneous applications to
interoperate with each other. You can use XML Web services
to integrate applications that are written in different
programming languages and deployed on different platforms.
In addition, you can deploy XML Web services within an
intranet as well as on the Internet. While the Internet
brings users closer to organizations, XML Web services
allow organizations to integrate their applications.
A Windows service starts much before any user logs in to
the system (if it has been setup to start at boot up
process). A Windows service can also be setup in such a way
that it requires a user to start it manually ? the ultimate
customization!
Windows services run as background processes. These
applications do not have a user interface, which makes them
ideal for tasks that do not require any user interaction.
You can install a Windows service on any server or computer
that is running Windows 2000, Windows XP, or Windows NT.
You can also specify a Windows service to run in the
security context of a specific user account that is
different from the logged on user account or the default
computer account. For example, you can create a Windows
service to monitor performance counter data and react to
threshold values in a database.

Web service and servlets in the same project...web.xml?

Hello, I have a problem with my web service.
I have a server, which displays a web service. I programmed this service with JAXRPC.
I have a client, in another directory. I succeded in compiling, deploying and running the web service.
The problem is that after I tried to integrate this service in an existing project. This project contains servlets. In these servlets, I'm using sessions.
These servlets are on the same side as the server of the web service. Because of the implementation of my code, I'd like to use in the class that represents the server of the service, the same session as the one I'm using in the servlets.
But of course, it's not working by itself. I know there's something to do with the web.xml files.
The thing is that I created a web.xml file for the service, and another for the servlets.
I was thinking of joining both of them in one xml file, but everything crashes then...
Could someone tell me how to create a project with a web service and servlets, and mostly how to configure the xml file??
Thanks for any help
Philippe

Hello, I have a problem with my web service.
I have a server, which displays a web service. I programmed this service with JAXRPC.
I have a client, in another directory. I succeded in compiling, deploying and running the web service.
The problem is that after I tried to integrate this service in an existing project. This project contains servlets. In these servlets, I'm using sessions.
These servlets are on the same side as the server of the web service. Because of the implementation of my code, I'd like to use in the class that represents the server of the service, the same session as the one I'm using in the servlets.
But of course, it's not working by itself. I know there's something to do with the web.xml files.
The thing is that I created a web.xml file for the service, and another for the servlets.
I was thinking of joining both of them in one xml file, but everything crashes then...
Could someone tell me how to create a project with a web service and servlets, and mostly how to configure the xml file??
Thanks for any help
Philippe

ASMX web service and The remote server returned an error: (500) Internal Server Error issue

i have developed a very small web service and which is hosted along with our web site. our webservice url is
http://www.bba-reman.com/Search/SearchDataIndex.asmx
web service code
namespace WebSearchIndex
#region SearchDataIndex
/// <summary>
/// SearchDataIndex is web service which will call function exist in another library for part data indexing
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[System.ComponentModel.ToolboxItem(false)]
// To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line.
// [System.Web.Script.Services.ScriptService]
public class SearchDataIndex : System.Web.Services.WebService
//public AuthHeader ServiceAuth=null;
public class AuthHeader : SoapHeader
public string Username;
public string Password;
#region StartIndex
/// <summary>
/// this function will invoke CreateIndex function of SiteSearch module to reindex the data
/// </summary>
[WebMethod]
public string StartIndex(AuthHeader auth)
string strRetVal = "";
if (auth.Username == "Admin" && auth.Password == "Admin")
strRetVal = SiteSearch.CreateIndex(false);
else
SoapException se = new SoapException("Failed : Invalid credentials",
SoapException.ClientFaultCode,Context.Request.Url.AbsoluteUri,new Exception("Invalid credentials"));
throw se;
return strRetVal;
#endregion
#endregion
when i was calling that web service from my win apps using
HttpWebRequest
class then getting error The remote server returned an error: (500) Internal Server Error
here is code of my win apps from where i am calling web service
string strXml = "";
strXml = "<s:Envelope xmlns:s='http://schemas.xmlsoap.org/soap/envelope/'><s:Body><StartIndex xmlns='http://tempuri.org/' xmlns:i='http://www.w3.org/2001/XMLSchema-instance'><auth><Username>joy</Username><Password>joy</Password></auth></StartIndex></s:Body></s:Envelope>";
string url = "http://www.bba-reman.com/Search/SearchDataIndex.asmx";
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.ContentType = "text/xml";
req.KeepAlive = false;
req.ContentLength = strXml.Length;
StreamWriter streamOut = new StreamWriter(req.GetRequestStream(), System.Text.Encoding.ASCII);
streamOut.Write(strXml);
streamOut.Close();
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
string strResponse = streamIn.ReadToEnd();
streamIn.Close();
i am just not being able to understand when this line execute
StreamReader streamIn = new StreamReader(req.GetResponse().GetResponseStream());
then getting the error The remote server returned an error: (500) Internal Server Error
not being able to understand where i made the mistake. mistake is in the code of web service end or in calling code?
help me to fix this issue. thanks

Hi Mou,
I just tried your win app code about calling web service, but failed. I got the 500 error after I called your service:
The error message I quoted from Fiddler:
<?xml version="1.0" encoding="utf-8"?><soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><soap:Body><soap:Fault><faultcode>soap:Client</faultcode><faultstring>System.Web.Services.Protocols.SoapException: Failed : Invalid credentials ---> System.Exception: Invalid credentials
--- End of inner exception stack trace ---
at BBAReman.WebSearchIndex.SearchDataIndex.StartIndex(AuthHeader auth)</faultstring><faultactor>http://www.bba-reman.com/Search/SearchDataIndex.asmx</faultactor><detail /></soap:Fault></soap:Body></soap:Envelope>
I am not totally sure that error occurred by the authentication. But I suggest you can try to add this service into your project using this method below:
1.right click the Reference and select Add Service Reference
2.input your service link and click "Go"
And you can use this service as the following:
private async void callService()
ServiceReference1.SearchDataIndexSoapClient client =new ServiceReference1.SearchDataIndexSoapClient();
var Str= await client.StartIndexAsync(new ServiceReference1.AuthHeader { Username = "Admin", Password = "Admin" });
Please try it.
Regards,
Will
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Flow of sessiob bean and entity bean

Hi All,
Can any one help me how is the flow of session and entity beans i.e
What method is called first and what method is called next.
There are so many methods like create(),ejbcreate(),
ejbActivate(),ejbPassivate(),ejbDelete() etc.
What is the flow of these methods and when they are called.

Hi vasudulla,
If you can, go to the bookstore and look for the book:
Entreprise JavaBeans 3rd Edition by Richard Monson-Haefel.
In the Appendix B, you can see the State and Sequence Diagrams, all the things you want to know about the Flow.
--Paul.

How to connect to external web service and convert XML to a table

Hi experts,
I need to connect to external/non-SAP web service and convert XML in that site to a SAP table?
Is there a function call(SE37) to do this? Is it a must for me to install AS JAVA or PI and configure enterprise service? Please provide a link for me to retrieve relevant infomation, thx.

No, you don't need PI or the Java stack for this. You can create an ABAP proxy using the WSDL file for the web service and call the web service using the proxy class in an ABAP program. You can transform the XML response to internal tables/structures/variables using a transformation template that you create.

SQL Server 2008 Reporting Project - Invoke/Consume Web Service and Return Dataset in C# Code-Behind

Hello,
I have a Visual Studio 2010 C# class with a method that invokes/consumes a web service and returns an XML dataset. I am traversing through the parent/child nodes and parsing out the data then inserting it into a SQL Server 2008 R2 table for a join within
another stored procedure.
Instead of using a 3rd party API to generate the PDF for this data, I am creating an SSRS report. The formatting will be easier and I can do a RenderFormat directly to PDF.
Can I expect to be able to transfer the code-behind method to this report and have it be able to work with the web service the same way? It is a SOAP-based web service returning parent nodes and two levels of nested child nodes.
I have also been researching the approach of calling the web service in the same stored procedure that is currently querying the physical tables (which is used to populate a gridview and PDF) but it looks like it may only be possible with a CLR stored procedure.
Is it possible to implement a CLR stored procedure within an SSRS report?
Hope this makes sense. Any help, suggestion or point in the right direction would be greatly appreciated.
Thanks,
Buster

Hi Buster,
SSRS supports web service data source, we can call the SOAP-based web service in SSRS report directly. Then, we can use custom code in SSRS to parse the XML data. However, we won’t be able to join another data in SQL Server database.
Reference:http://technet.microsoft.com/en-us/library/aa964129(v=sql.90).aspx#repservxmlds_topic3
We cannot implement a CLR stored procedure within an SSRS report directly. In order to execute the CLR store procedure in a SSRS report, we have to execute it as text using the following code:
Exec <stored procedure name>
Reference:
http://dotnetslackers.com/Community/blogs/bmains/archive/2009/01/15/executing-a-clr-stored-procedure-in-reporting-services.aspx
Hope this helps.
Regards,
Alisa Tang
Alisa Tang
TechNet Community Support

Web services and control characters

Hi,
We are using JAXWS and JAXB to create web services. We have a problem with our current data because it sometimes contains "bad" characters, such as control characters. Is there a nice way for us to remove these characters when creating the messages or when retrieving the data from the database? We use java persistence / hibernate to retrieve the data from the database.
I would prefer a method that doesn't include having to "clean" each string manually...
Thanks!

hi, i�m doing something like you but in jbuilder that is another IDE, i don�t know if it is useful for you but i entered to the help of jbuilder and i wrote in the index "web services" and then i found a topic called : "export classes as webservices" and in that place i can see some steps to follow, may be in eclipse you can find something like this.

Load balancing SMA web service and SMA end point URL

Hi,
We have set up the recommended 3 servers with Azure Pack, SMA Web Service and Runbook Worker. We are now wanting to configure the Azure pack portal to setup the SMA endpoint url for the web service. Before we do that, we are assuming we should
load balance the web services to answer on 1 url (ie, smaws.domainname.com).
1. Is there any guidance or things to consider when load balancing the 3 web services to answer to 1 url. We will probably use f5 since that is what we use.
2. The end point url that we configure for Azure Pack automation should be this load balanced URL correct?
3. Should we have the Azure pack installed on just one of the servers or all 3. We did all 3 but it seems like server2 and 3 just redirect to 1 anyway so I am assuming the URL for Azure pack is stored in a db somewhere.
4. Are there any other components of SMA/Azure Pack that should also be load balanced?
Thanks
Thanks Lance

So in this case you need to register the SMA Runbook Workers (do this on machine 1):
$webService
= "https://localhost"
$workers
= (Get-SmaRunbookWorkerDeployment
-WebServiceEndpoint
$webService).ComputerName
if($workers
-isnot [system.array]) {$workers
= @($workers)}
$workers
+= "MachineName2"
$workers += "MachineName3"
New-SmaRunbookWorkerDeployment
-WebServiceEndpoint
$webService -ComputerName
$workers

Web services and entity beans

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