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EclipseLink/Examples/DBWS/DBWSOverloadStoredProcedure


{NB - this capability is available starting in version 2.3 of DBWS}

EclipseLink DBWS Service based on an overloaded PL/SQL Stored Procedure

The use-case for this example is the creation of a Web service that exposes multiple PL/SQL Stored Procedures. Normally, the user would specify in the DBWS builder file which procedures will make up the Web Service. However, in this scenario, the user can specify a single procedure name and leverage Oracle's support for overloading (where a single procedure can have different parameters specified):

CREATE PROCEDURE P(SIMPLARRAY IN TBL1, FOO IN VARCHAR2) AS
BEGIN
  -- 2 arguments SIMPLARRAY and FOO
END P;
CREATE PROCEDURE P(SIMPLARRAY IN TBL1, FOO IN VARCHAR2, BAR IN VARCHAR2) AS
BEGIN
  -- (same name 'P') 3 arguments SIMPLARRAY, FOO and BAR
END P;

Any combination of IN, OUT and IN OUT arguments are supported

Type TBL1 is defined in PL/SQL Package SOMEPACKAGE as follows:

CREATE OR REPLACE PACKAGE SOMEPACKAGE AS
  TYPE TBL1 IS TABLE OF VARCHAR2(111) INDEX BY BINARY_INTEGER;
  PROCEDURE P(SIMPLARRAY IN TBL1, FOO IN VARCHAR2);
  PROCEDURE P(SIMPLARRAY IN TBL1, FOO IN VARCHAR2, BAR IN VARCHAR2);
END SOMEPACKAGE;

The DBWSBuilder utility requires a DBWS configuration file as input.

<?xml version="1.0" encoding="UTF-8"?>
<dbws-builder xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <properties>
    <property name="projectName">testOverloadedProcedure</property>
    ... database properties
  </properties>
  <plsql-procedure
   name="overloadedProcedure"
   catalogPattern="SOMEPACKAGE"
   procedurePattern="P"
 />
</dbws-builder>
prompt > dbwsbuilder.cmd -builderFile dbws-builder.xml -stageDir output_directory -packageAs wls testEcho.war

where

  • dbws-builder.xml is the DBWS builder XML file above
  • output_directory is the output directory for the generated files
  • -packageAs specifies the platform on which the web service will be deployed

When generating queries and the WSDL when overloaded procedures are present, an index is used to uniquely identify each procedure. The index starts at 1, and incremented for each overloaded procedure. The generated eclipselink-dbws.wsdl for this example follows.  :

<wsdl:definitions
    name="plsqloverloadService"
    targetNamespace="urn:plsqloverloadService"
    xmlns:ns1="urn:plsqloverload"
    xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"
    xmlns:tns="urn:plsqloverloadService"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema"
    xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/"
   >
    <wsdl:types>
        <xsd:schema elementFormDefault="qualified" targetNamespace="urn:plsqloverloadService" xmlns:tns="urn:plsqloverloadService"
            xmlns:xsd="http://www.w3.org/2001/XMLSchema">
            <xsd:import namespace="urn:plsqloverload" schemaLocation="eclipselink-dbws-schema.xsd"/>
            <xsd:complexType name="p1ResponseType">
                <xsd:sequence>
                    <xsd:element name="result">
                        <xsd:complexType><xsd:sequence><xsd:any/></xsd:sequence></xsd:complexType>
                    </xsd:element>
                </xsd:sequence>
            </xsd:complexType>
            <xsd:complexType name="p1RequestType">
                <xsd:sequence>
                    <xsd:element name="SIMPLARRAY" type="ns1:SOMEPACKAGE_TBL1"/>
                    <xsd:element name="FOO" type="xsd:string"/>
                </xsd:sequence>
            </xsd:complexType>
            <xsd:complexType name="p2ResponseType">
                <xsd:sequence>
                    <xsd:element name="result">
                        <xsd:complexType><xsd:sequence><xsd:any/></xsd:sequence></xsd:complexType>
                    </xsd:element>
                </xsd:sequence>
            </xsd:complexType>
            <xsd:complexType name="p2RequestType">
                <xsd:sequence>
                    <xsd:element name="SIMPLARRAY" type="ns1:SOMEPACKAGE_TBL1"/>
                    <xsd:element name="FOO" type="xsd:string"/>
                    <xsd:element name="BAR" type="xsd:string"/>
                </xsd:sequence>
            </xsd:complexType>
            <xsd:element name="p2" type="tns:p2RequestType"/>
            <xsd:element name="p1" type="tns:p1RequestType"/>
            <xsd:element name="p1Response" type="tns:p1ResponseType"/>
            <xsd:element name="p2Response" type="tns:p2ResponseType"/>
        </xsd:schema>
    </wsdl:types>
    <wsdl:message name="p2Request"><wsdl:part name="p2Request" element="tns:p2"/></wsdl:message>
    <wsdl:message name="p2Response"><wsdl:part name="p2Response" element="tns:p2Response"/></wsdl:message>
    <wsdl:message name="p1Request"><wsdl:part name="p1Request" element="tns:p1"/></wsdl:message>
    <wsdl:message name="p1Response"><wsdl:part name="p1Response" element="tns:p1Response"/></wsdl:message>
    <wsdl:portType name="plsqloverloadService_Interface">
        <wsdl:operation name="p2">
            <wsdl:input message="tns:p2Request"/>
            <wsdl:output message="tns:p2Response"/>
        </wsdl:operation>
        <wsdl:operation name="p1">
            <wsdl:input message="tns:p1Request"/>
            <wsdl:output message="tns:p1Response"/>
        </wsdl:operation>
    </wsdl:portType>
    <wsdl:binding name="plsqloverloadService_SOAP_HTTP" type="tns:plsqloverloadService_Interface">
        <soap:binding style="document" transport="http://schemas.xmlsoap.org/soap/http"/>
        <wsdl:operation name="p2">
            <soap:operation soapAction="urn:plsqloverloadService:p2"/>
            <wsdl:input><soap:body use="literal"/></wsdl:input>
            <wsdl:output><soap:body use="literal"/></wsdl:output>
        </wsdl:operation>
        <wsdl:operation name="p1">
            <soap:operation soapAction="urn:plsqloverloadService:p1"/>
            <wsdl:input><soap:body use="literal"/></wsdl:input>
            <wsdl:output><soap:body use="literal"/></wsdl:output>
        </wsdl:operation>
    </wsdl:binding>
    <wsdl:service name="plsqloverloadService">
        <wsdl:port name="plsqloverloadServicePort" binding="tns:plsqloverloadService_SOAP_HTTP">
            <soap:address location="REPLACE_WITH_ENDPOINT_ADDRESS"/>
        </wsdl:port>
    </wsdl:service>
</wsdl:definitions>