Calling a WebService from servlet

Hello,
When i am trying to call my WS(generated from ABAP ) from a servlet, i have this error :
[EXCEPTION]
javax.xml.ws.WebServiceException: Invalid Response code (404). Server [http://adressWebService] returned message [Not Found]. Http proxy info: none
at com.sap.engine.services.webservices.espbase.client.jaxws.core.WSInvocationHandler.processTransportBindingCall(WSInvocationHandler.java:174)
Does anyone had an idea about this error ?
Thanks in advance for your help,
Regards,
Khalida

I have a great idea to look internet
http://en.wikipedia.org/wiki/HTTP_404

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Error while calling PI webservice from EJB

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Location: com.sap.engine.services.webservices.espbase.client.bindings.impl.SOAPTransportBinding
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[EXCEPTION]
com.sap.engine.services.webservices.espbase.client.bindings.exceptions.TransportBindingException: Connection IO Exception. Check nested exception for details. (Connection reset).
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at com.sap.engine.services.webservices.espbase.client.bindings.impl.SOAPTransportBinding.call_SOAP(SOAPTransportBinding.java:1364)
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at com.sap.engine.services.webservices.espbase.client.bindings.impl.SOAPTransportBinding.call(SOAPTransportBinding.java:944)
at com.sap.engine.services.webservices.espbase.client.jaxws.core.WSInvocationHandler.processTransportBindingCall(WSInvocationHandler.java:168)
at com.sap.engine.services.webservices.espbase.client.jaxws.core.WSInvocationHandler.invokeSEISyncMethod(WSInvocationHandler.java:121)
at com.sap.engine.services.webservices.espbase.client.jaxws.core.WSInvocationHandler.invokeSEIMethod(WSInvocationHandler.java:84)
at com.sap.engine.services.webservices.espbase.client.jaxws.core.WSInvocationHandler.invoke(WSInvocationHandler.java:65)
at $Proxy780.mioaRDMDataDistribution(Unknown Source)
at com.MDMEventListener.callToPIWS(MDMEventListener.java:100)
at com.MDMEventListener.ListenerMethod(MDMEventListener.java:173)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.sap.engine.services.ejb3.runtime.impl.RequestInvocationContext.proceedFinal(RequestInvocationContext.java:47)
at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:166)
at com.sap.engine.services.ejb3.runtime.impl.Interceptors_WS.invoke(Interceptors_WS.java:31)
at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:177)
at com.sap.engine.services.ejb3.runtime.impl.Interceptors_StatesTransition.invoke(Interceptors_StatesTransition.java:19)
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at com.sap.engine.services.ejb3.runtime.impl.Interceptors_Resource.invoke(Interceptors_Resource.java:71)
at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:177)
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at com.sap.engine.services.ejb3.runtime.impl.Interceptors_Transaction.invoke(Interceptors_Transaction.java:23)
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at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:189)
at com.sap.engine.services.ejb3.runtime.impl.Interceptors_StatelessInstanceGetter.invoke(Interceptors_StatelessInstanceGetter.java:16)
at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:177)
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at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:177)
at com.sap.engine.services.ejb3.runtime.impl.Interceptors_ExceptionTracer.invoke(Interceptors_ExceptionTracer.java:17)
at com.sap.engine.services.ejb3.runtime.impl.AbstractInvocationContext.proceed(AbstractInvocationContext.java:177)
at com.sap.engine.services.ejb3.runtime.impl.DefaultInvocationChainsManager.startChain(DefaultInvocationChainsManager.java:138)
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at com.sap.engine.services.webservices.espbase.server.runtime.RuntimeProcessingEnvironment.process0(RuntimeProcessingEnvironment.java:730)
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at com.sap.engine.services.webservices.espbase.client.bindings.ClientHTTPTransport.getResponseCode(ClientHTTPTransport.java:209)
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... 78 more
Regards,
Pradeep

Hi Pradeep,
this looks like if the server is not reachable. Have you checked if both server are able to communicate? Maybe firewall rules block the request.
Regards,
Tobias

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Hi
Thanks a lot for your kind support.
Hi Moorthy
We have created one Asyn MI and wrapped the external definition into that, Haven't done any mapping for responce. Please find the trace below.
Hi Bhavesh
It was great helpful link but the payload days is not visible for this message it was containing details about sending. For some other message i could see payload.
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The asynchronous message was successfully scheduled to be delivered at Wed Nov 29 16:23:51 GMT 2006.
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Message was edited by:
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thanks Tugduall for the comments. here are the instructions I followed to create a java stored procedure that can call a webservices. Unfortunately, this seems like a very complex task. Do you have any ideas how I could debug or troubleshoot this issue ?
Please note that I used JDeveloper to generate the client code.
========================================================
1. download the dbws-callout-utility-10R2.zip from OTN at:
http://www.oracle.com/technology/sample_code/tech/java/jsp/dbwebservices.html
2. create an application/project with 1.4 JDK.
3. create a web service by ‘Business Tier’->Web Service->Web Service Proxy->UDDI
4. next… to ‘Search for’, type ‘quote’.
5. from the list select one. For me ‘Quote of day’ was picked.
6. click Next all the way to Finish.
7. from the ‘Application Sources’ select ‘QuotoProxy’ then find its main method.
8. at the section
// Add your own code here, add the line like:
System.out.println("quote "+myPort.getQuote());
9. run it to see its return.
10. cteate a class that has a method to call client method to be invoked (static)
like the following:
package dbws;
import dbws.QotdPortClient;
public class MainClientStub {
public MainClientStub() {
public static String getMyQoute(){
QotdPortClient myClient = null;
try {
myClient = new QotdPortClient();
return myClient.getQuote();
} catch (Exception e) {
e.printStackTrace();
return null;
note that the package name in your project.
11. create a deployment profile as ‘JAR File’. Uncheck the box ‘Project Dependencies’
12. deploy it to the local box. ‘Deploy to JAR File’.
13. unzip the dbws-callout-utility-10R2.zip to get dbwsa.jar.
14. execute the following from command line:
loadjava –user test/[email protected] -resolve –verbose –synonym –grant public to dbwsa.jar myarchive1.jar
loadjava -user test/test@orcl1020 -resolve -verbose -synonym -genmissing -grant public myarchive1.j
ar dbwsa.jar
loadjava -user sys/<sys_pass> -resolve -verbose -synonym -genmissing -grant public myarchive1.jar dbwsa.jar
15. create a function like the following:
CREATE OR REPLACE FUNCTION teststub RETURN VARCHAR2 AS
LANGUAGE JAVA NAME ‘dbws.MainClientStub.getMyQoute() return java.lang.String’;
16. Run at sqlplus: Select teststub from dual;
======================================================

How To : Call External Webservice from BPEL and pass SOAP Message to the WS

Hello All-
Greetings to all BPEL gurus. I am currently facing difficulties in calling an External Webservice from my BPEL Process and passing SOAP Message to it. The details are below:
1. The BPEL process, using database polling feature of DB Adapter, will get the records from the database.
2. Transform the message
3. Call the External Webservice and pass the transformed message as the input to it. However the Webservice expects the BPEL process to send SOAP headers in the input message.
I am struggling on how to put the transformed message within a SOAP envelope in the BPEL process.
If anyone had similar requirements and have successfully been able to send SOAP messages from BPEL process to an external webservice, kindly let me know.
Also if there is some kind of documentation or any link in the forum that I can refer, please let me know that as well.
I am new to Webservice integration using BPEL and would really appreciate your help.
Thanks In Advance
Regards,
Dibya

Hi Dharmendra,
I am trying to send a SOAP message from my BPEL process to a web service. I have a complete SOAP message in a complex variable defined in the wsdl for the partnerlink (web service). My problem is that when I invoke the partnerlink it fails even though the content shown in the BPEL console looks valid.
I have set up obtunnel to see what I am actually sending out from BPEL. You mention that BPEL creates the SOAP envelope automatically.
I think that my problem is a result of this automatic SOAP envelope that BPEL is creating. Do you know if there is a way to turn it off?
This is what I see in the TCP monitor, please note the double SOAP env:Body:
<env:Envelope xmlns:env="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <env:Body> <RCMR_IN000002NR01 xmlns="urn:hl7-org:v3" xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:wsa="http://www.w3.org/2005/08/addressing" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd">
<env:Header>
<wsa:To xmlns:wsa="http://www.w3.org/2005/08/addressing">http://testhost/CCS/Service_Endpoint</wsa:To>
<wsa:From xmlns:wsa="http://www.w3.org/2005/08/addressing">
<wsa:Address>http://localhost/CCS/Service_Endpoint</wsa:Address>
<wsa:Metadata>
<device xmlns:hl7="urn:hl7-org:v3">
</device>
</wsa:Metadata>
</env:Header>
<env:Body>
<RCMR_IN000002NR01>
</RCMR_IN000002NR01>
</env:Body>
</RCMR_IN000002NR01>
</env:Body>
</env:Envelope>
Any help is appreciated.
Regards,
Aagaard
Edited by: Aagaard on Oct 30, 2008 8:59 PM
Should have mentioned. I am using BPEL 10.1.3.4
Edited by: Aagaard on Oct 31, 2008 8:43 AM
I have opened a new thread for this question so as to not confuse the issue more than necessary.
How many SOAP envelopes do you really need?

Calling a webservice from weblogic EJB Application

Hello,
I have a webservice running on IIS server. I created a simple java client program to call the webservice and it works fine. However, when I wrapped the same java client program as a EJB Application, I am unable to call the webservice.
I get the following error:
####<Apr 3, 2007 1:59:30 AM CDT> <Info> <WebService> <CASEJBServer> <ExecuteThread: '24' for queue: 'weblogic.kernel.Default'> <<anonymous>> <> <BEA-220094> <An IOException was thrown trying to access the WSDL at the given URL.>
And
"java.io.FileNotFoundException: Response: '401: Unauthorized' for url: XXXXXX"
Could you please give some simple steps as what are the JAR Files required to be included in the Weblogic Server's classpath to call the webservice.
Thanks.

To start off you need to make sure that your client api is in the classpath, either in your ejb or your ear or the server classpath.
The other concern I would have is that it seems you are just not authorized to access the URL.
- Does the WSDL require credentials? So in other words when you go to the URL are you allowed to access the WSDL without athenticating.
- How does your Impl get created?
MyServiceImpl service = new MyServiceImpl()
If you are using the empty constructor then what is the wsdl endpoint in your jar file since that is the wsdl it will use. If the endpoint is localhost/xxx/xxx then you will have issues since that means your not deployed on localhost. What url is at the endpoint? Do you have access to the url from your server?
If you are using "new MyServiceImpl(url);" then again is the wsdl locked down because in this case you will need to do somthing like http://username:[email protected]/xxx?wsdl
Hope this helps.
-Jesus

Calling a webservice from Pl/SQL

Hi,
I have created a function to call a webservice but I am getting the following error
ORA-20000: soap:Client - System.Web.Services.Protocols.SoapException: Server
did not recognize the value of HTTP Header SOAPAction: ConversionRate.
at System.Web.Services.Protocols.Soap11ServerProtocolHelper.RouteRequest()
at
System.Web.Services.Protocols.SoapServerProtocol.RouteRequest(SoapServerMessage
message)
at System.Web.Services.Protocols.SoapServerProtocol.Initialize()
at System.Web.Services.Protocols.ServerProtocolFactory.Create(Type type,
HttpContext context, HttpRequest request, HttpResponse response, Boolean&
abortProcessing)
ORA-06512: at "APPS.SOAP_API", line 54
ORA-06512: at "APPS.SOAP_API", line 81
ORA-06512: at "APPS.PKG_MY_WEBSERVICE", line 12
The Packages code are as follow:
CREATE OR REPLACE PACKAGE soap_api AS
TYPE t_request IS RECORD (
method VARCHAR2(256),
namespace VARCHAR2(256),
body VARCHAR2(32767),
envelope_tag VARCHAR2(30)
TYPE t_response IS RECORD
doc XMLTYPE,
envelope_tag VARCHAR2(30)
FUNCTION new_request(p_method IN VARCHAR2,
p_namespace IN VARCHAR2,
p_envelope_tag IN VARCHAR2 DEFAULT 'SOAP-ENV')
RETURN t_request;
PROCEDURE add_parameter(p_request IN OUT NOCOPY t_request,
p_name IN VARCHAR2,
p_type IN VARCHAR2,
p_value IN VARCHAR2);
FUNCTION invoke(p_request IN OUT NOCOPY t_request,
p_url IN VARCHAR2,
p_action IN VARCHAR2)
RETURN t_response;
FUNCTION get_return_value(p_response IN OUT NOCOPY t_response,
p_name IN VARCHAR2,
p_namespace IN VARCHAR2)
RETURN VARCHAR2;
END soap_api;
CREATE OR REPLACE PACKAGE BODY soap_api AS
FUNCTION new_request(p_method IN VARCHAR2,
p_namespace IN VARCHAR2,
p_envelope_tag IN VARCHAR2 DEFAULT 'SOAP-ENV')
RETURN t_request AS
l_request t_request;
BEGIN
l_request.method := p_method;
l_request.namespace := p_namespace;
l_request.envelope_tag := p_envelope_tag;
RETURN l_request;
END;
PROCEDURE add_parameter(p_request IN OUT NOCOPY t_request,
p_name IN VARCHAR2,
p_type IN VARCHAR2,
p_value IN VARCHAR2) AS
BEGIN
p_request.body := p_request.body||'<'||p_name||' xsi:type="'||p_type||'">'||p_value||'</'||p_name||'>';
END;
PROCEDURE generate_envelope(p_request IN OUT NOCOPY t_request,
p_env IN OUT NOCOPY VARCHAR2) AS
BEGIN
p_env := '<'||p_request.envelope_tag||':Envelope xmlns:'||p_request.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/" ' ||
'xmlns:xsi="http://www.w3.org/1999/XMLSchema-instance" xmlns:xsd="http://www.w3.org/1999/XMLSchema">' ||
'<'||p_request.envelope_tag||':Body>' ||
'<'||p_request.method||' '||p_request.namespace||' '||p_request.envelope_tag||':encodingStyle="http://schemas.xmlsoap.org/soap/encoding/">' ||
p_request.body ||
'</'||p_request.method||'>' ||
'</'||p_request.envelope_tag||':Body>' ||
'</'||p_request.envelope_tag||':Envelope>';
END;
PROCEDURE show_envelope(p_env IN VARCHAR2) AS
i PLS_INTEGER;
l_len PLS_INTEGER;
BEGIN
i := 1; l_len := LENGTH(p_env);
WHILE (i <= l_len) LOOP
DBMS_OUTPUT.put_line(SUBSTR(p_env, i, 60));
i := i + 60;
END LOOP;
END;
PROCEDURE check_fault(p_response IN OUT NOCOPY t_response) AS
l_fault_node XMLTYPE;
l_fault_code VARCHAR2(256);
l_fault_string VARCHAR2(32767);
BEGIN
l_fault_node := p_response.doc.extract('/'||p_response.envelope_tag||':Fault',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/');
IF (l_fault_node IS NOT NULL) THEN
l_fault_code := l_fault_node.extract('/'||p_response.envelope_tag||':Fault/faultcode/child::text()',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/').getstringval();
l_fault_string := l_fault_node.extract('/'||p_response.envelope_tag||':Fault/faultstring/child::text()',
'xmlns:'||p_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/').getstringval();
RAISE_APPLICATION_ERROR(-20000, l_fault_code || ' - ' || l_fault_string);
END IF;
END;
FUNCTION invoke(p_request IN OUT NOCOPY t_request,
p_url IN VARCHAR2,
p_action IN VARCHAR2)
RETURN t_response AS
l_envelope VARCHAR2(32767);
l_http_request UTL_HTTP.req;
l_http_response UTL_HTTP.resp;
l_response t_response;
BEGIN
generate_envelope(p_request, l_envelope);
show_envelope(l_envelope);
l_http_request := UTL_HTTP.begin_request(p_url, 'POST','HTTP/1.1');
UTL_HTTP.set_header(l_http_request, 'Content-Type', 'text/xml');
UTL_HTTP.set_header(l_http_request, 'Content-Length', LENGTH(l_envelope));
UTL_HTTP.set_header(l_http_request, 'SOAPAction', p_action);
UTL_HTTP.write_text(l_http_request, l_envelope);
l_http_response := UTL_HTTP.get_response(l_http_request);
UTL_HTTP.read_text(l_http_response, l_envelope);
UTL_HTTP.end_response(l_http_response);
l_response.doc := XMLTYPE.createxml(l_envelope);
l_response.envelope_tag := p_request.envelope_tag;
l_response.doc := l_response.doc.extract('/'||l_response.envelope_tag||':Envelope/'||l_response.envelope_tag||':Body/child::node()',
'xmlns:'||l_response.envelope_tag||'="http://schemas.xmlsoap.org/soap/envelope/"');
-- show_envelope(l_response.doc.getstringval());
check_fault(l_response);
RETURN l_response;
END;
FUNCTION get_return_value(p_response IN OUT NOCOPY t_response,
p_name IN VARCHAR2,
p_namespace IN VARCHAR2)
RETURN VARCHAR2 AS
BEGIN
RETURN p_response.doc.extract('//'||p_name||'/child::text()',p_namespace).getstringval();
END;
END soap_api;
SHOW ERRORS
CREATE OR REPLACE PACKAGE pkg_my_webservice IS
FUNCTION call_myfunction(vp_parameter1 VARCHAR2,vp_parameter2 VARCHAR2) RETURN VARCHAR2;
END pkg_my_webservice;
CREATE OR REPLACE PACKAGE BODY pkg_my_webservice IS
vg_funciton_fnc VARCHAR2(256):='ConversionRate';
vg_ws_address VARCHAR2(255):='http://www.webservicex.net/CurrencyConvertor.asmx';
FUNCTION call_myfunction(vp_parameter1 VARCHAR2,vp_parameter2 VARCHAR2)
RETURN VARCHAR2 AS
ol_req soap_api.t_request;
ol_resp soap_api.t_response;
BEGIN
ol_req:=soap_api.new_request(vg_funciton_fnc,'xmlns="'||vg_ws_address||'"');
soap_api.add_parameter(ol_req,'string1','partns:string',vp_parameter1);
soap_api.add_parameter(ol_req,'string2','partns:string',vp_parameter1);
ol_resp:=soap_api.invoke(ol_req,vg_ws_address,vg_funciton_fnc);
RETURN soap_api.get_return_value(ol_resp,'result','xmlns:m="'||vg_ws_address||'"');
END call_myfunction;
END pkg_my_webservice;
-----------------------------------------------------------------------------------------------------------------------------------

Hi,
The soap_api package internally uses the utl_http api. I used the utl_http package directly and it works for me. Below is the code for the call, you will have to substitute the variables to suit your setup..
Hope this Helps
Thanks
CREATE OR REPLACE FUNCTION get_webservice_dets(p_emp_number IN VARCHAR2
,p_eff_date IN DATE)
RETURN VARCHAR2
IS
lc_proc VARCHAR2(50) := 'get_webservice_dets';
ln_error_stg NUMBER := 0;
lc_eff_date VARCHAR2(50) := NULL;
soap_request VARCHAR2(32767);
soap_respond VARCHAR2(32767);
-- HTTP variables
req utl_http.req;
resp utl_http.resp;
-- Store the Webservice URL in a Profile Option and change for each environment
lc_wsdl_url VARCHAR2(32767) := FND_PROFILE.VALUE('XXERP_WEBSRVC_URL');
-- return Values
lc_retval VARCHAR2(32767);
lc_response VARCHAR2(32767);
lc_xml_ext_str VARCHAR2(100) := '/env:Envelope/env:Body/OutputParameters/';
lc_xml_ext_unit VARCHAR2(50) := '/text()';
lc_xmlns_ns1_url VARCHAR2(240) := 'xmlns:ns1="http://xmlns.oracle.com/pcbpel/adapter/db/APPS/XXERP_SOA_HCM_PKG/GET_SUPERVISOR_NO/"';
lc_xmlns_env_url VARCHAR2(240) := 'xmlns:env="http://schemas.xmlsoap.org/soap/envelope/"';
lc_xmlns_xsi_url VARCHAR2(240) := 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"';
lc_xmlns_url VARCHAR2(240) := 'xmlns="http://xmlns.oracle.com/pcbpel/adapter/db/APPS/XXERP_SOA_HCM_PKG/GET_SUPERVISOR_NO/"';
lc_xml_namespace VARCHAR2(5000) := lc_xmlns_env_url||' '||lc_xmlns_xsi_url||' '||lc_xmlns_url;
lc_xmlns_soap_url VARCHAR2(240) := 'xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"';
lx_Response XMLTYPE;
BEGIN
ln_error_stg := 10;
IF NVL(lc_wsdl_url,'X') <> 'X' THEN
-- Format the date received as required by the Webservice i.e. - 'YYYY-MM-DDTHH:MI:SS+01:00'
lc_eff_date := REPLACE(TRIM(TO_CHAR(TRUNC(p_eff_date),'YYYY-MM-DD HH:MI:SS')),' ','T')||'+01:00';
-- Form a SOAP Envelope - Exact envelope can be obtained by invoking the above EndPoint URL in a browser session with required
-- parameters and then clicking on the XML Source
soap_request:= '<soap:Envelope '||lc_xmlns_soap_url||'>
<soap:Body '||lc_xmlns_ns1_url||'>
<ns1:InputParameters>
<ns1:P_EMPLOYEE_NUMBER>'||p_emp_number||'</ns1:P_EMPLOYEE_NUMBER>
<ns1:P_DATE>'||lc_eff_date||'</ns1:P_DATE>
</ns1:InputParameters>
</soap:Body>
</soap:Envelope>';
-- Initiate the HTTP request, don't forget to pass in the POST and HTTP/1.1
req := UTL_HTTP.BEGIN_REQUEST(lc_wsdl_url, 'POST','HTTP/1.1');
ln_error_stg := 20;
-- Set the HTTP Request Headers
UTL_HTTP.SET_HEADER(req, 'Content-Type', 'text/xml'); -- since we are dealing with plain text in XML documents
ln_error_stg := 40;
UTL_HTTP.SET_HEADER(req, 'Content-Length', LENGTH(soap_request));
ln_error_stg := 50;
-- Set the SOAP Action to the Operation Name
-- The function Name <getSupervisorID> should match the Webservice Operation Name in SOA
UTL_HTTP.SET_HEADER(req, 'SOAPAction','getSupervisorID'); -- required to specify this is a SOAP communication
ln_error_stg := 60;
-- Append the SOAP Envelope to the HTTP request Header
UTL_HTTP.WRITE_TEXT(req, soap_request);
ln_error_stg := 70;
-- Fetch the HTTP response from the Webservice - This will contain the SOAP Envelope response
-- that needs to be processed downstream
resp := UTL_HTTP.GET_RESPONSE(req);
ln_error_stg := 80;
-- Extract the HTTP response and store in a String Variable
-- READ_TEXT is a specific method exposed to read the SOAP envelope returned from Webservice
-- READ_LINE will read the entire HTML response back from the Server..
UTL_HTTP.READ_TEXT(resp, lc_retval);
ln_error_stg := 90;
-- Create an XML Document from the String returned by the HTTP response..
lx_Response := SYS.XMLTYPE.CREATEXML(lc_retval);
ln_error_stg := 110;
-- If the response is not null then extract the string value of the required output parameter
-- the env: tag needs to be qualified with a corresponding namespace.
IF lx_Response IS NOT NULL THEN
lc_response := lx_Response.extract(lc_xml_ext_str||'PERSON_ID'||lc_xml_ext_unit,lc_xml_namespace).getstringval();
ELSE
DBMS_OUTPUT.PUT_LINE('XMLTYPE Doc returns NULL !!');
lc_response := NULL;
END IF;
ln_error_stg := 120;
-- End the response, otherwise you get
-- UTL_HTTP.TOO_MANY_REQUESTS exception after 5 tries
UTL_HTTP.END_RESPONSE(resp);
ELSE
DBMS_OUTPUT.PUT_LINE('Web Service URL not populated, please provide a value for the Profile Option XXERP: Web Service URL');
lc_response := NULL;
END IF;
RETURN lc_response;
EXCEPTION
WHEN UTL_HTTP.TOO_MANY_REQUESTS THEN
UTL_HTTP.END_RESPONSE(resp);
RETURN NULL;
WHEN UTL_HTTP.END_OF_BODY THEN
UTL_HTTP.END_RESPONSE(resp);
RETURN NULL;
WHEN OTHERS THEN
DBMS_OUTPUT.PUT_LINE('ERROR @'||ln_error_stg||': '||SQLERRM);
UTL_HTTP.END_RESPONSE(resp);
RETURN NULL;
END get_webservice_dets;

Calling a WebService from servlet

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