尝试使用S / 4HANA Cloud SDK从S / 4HANA Cloud创建包含数据源的自定义OData v2服务

Question

I am trying to create a custom OData v2 service in java with an S/4HANA Cloud data source using S/4HANA Cloud SDK. I tried to follow section 8.3 of the SAP Press book "Extending SAP S/HANA: Side-by-Side Extensions with the SAP S/HANA Cloud SDK", except I attempted to substitute OData version 2 for version 4 in the dependency on page 285. When I execute mvn clean install, it errors out telling me it can't find odatav2 in com.sap.cloud.servicesdk.prov. (I get a clean install when I use odatav4 instead.) The reason I want OData v2 is version 4 doesn't appear to be well-supported for SAPUI5 apps.

Answer 1

The setup for OData V2 provisioning looks a bit different. So remove all modifications you did to use OData V4 provisioning. Then add the following:

1. Add the following dependencies (instead of the odata-v4 one) to your application/pom.xml file:

    <dependency> <groupId>com.sap.cloud.servicesdk.prov</groupId> <artifactId>odata2.web</artifactId> <exclusions> <exclusion> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.sap.cloud.servicesdk.prov</groupId> <artifactId>odata2.xsa</artifactId> </dependency> <dependency> <groupId>com.sap.cloud.servicesdk.prov</groupId> <artifactId>odatav2-hybrid</artifactId> <exclusions> <exclusion> <groupId>javax.servlet</groupId> <artifactId>servlet-api</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>com.sap.cloud.servicesdk.prov</groupId> <artifactId>odatav2-prov</artifactId> </dependency> 

2. Add the following entries to your application/src/main/webapp/WEB-INF/web.xml file, replacing YOUR.PACKAGE with a package to search for your OData endpoints:

    <servlet> <servlet-name>ODataServlet</servlet-name> <servlet-class>org.apache.olingo.odata2.core.servlet.ODataServlet</servlet-class> <load-on-startup>1</load-on-startup> <init-param> <param-name>org.apache.olingo.odata2.service.factory</param-name> <param-value> com.sap.cloud.sdk.service.prov.v2.rt.core.CloudSDKODataServiceFactory </param-value> </init-param> <init-param> <param-name>org.apache.olingo.odata2.path.split</param-name> <param-value>1</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>ODataServlet</servlet-name> <url-pattern>/odata/v2/*</url-pattern> </servlet-mapping> <context-param> <param-name>package</param-name> <param-value>YOUR.PACKAGE</param-value> </context-param> <listener> <listener-class> com.sap.cloud.sdk.service.prov.v2.rt.core.web.ServletListener </listener-class> </listener> 

3. Add an OData V2 edmx file to the application/src/main/resources/edmx directory.

These steps should get your OData V2 Provisioning service up and running.