Here is my today's model of the background research and how to consume OData data in IE:
SPRO inside:
This model provider class defines all of the structure LWM_CUSTOMER_BRIEFING this model, as well as the relationship between the structure.
Now is not a graphical interface tool to do modelling, we can only define the structure model in CL_LWM_CB_ADAPTER_MDP the DEFINE inside. The specific approach is to use pre-defined background of the type of entity in the Data,
the Customer Briefing all use of DDIC object to all on this package inside: LWM_CRM_CUSTOMER_BRIEFING
In DEFINE inside, ABAP code created by one entity, they are tied to the DDIC object, while building the relationship, such as association.
通过http://ldcigm2.herr.corp:50018/sap/opu/sdata/sap/customer_briefing?sap-client=001 我们可以拿到customer briefing的service document。
Service document里面只定义了哪些entity暴露了哪些操作，真正metadata的full definition xml用这个URL down：
http://ldcigm2.jerry.corp:50018/sap/opu/sdata/sap/customer_briefing/KaTeX parse error: Expected 'EOF', got '&' at position 24: …?sap-client=001&̲format=xml
service document也能通过SICF进去之后，从sap node出发，点test拿到。
比如这部分就说明CustomerCollection这个节点能够执行“search”的action:
然后我们在IE里面测试：
http://ldcigm2.jerry.corp:50018/sap/opu/sdata/sap/CUSTOMER_BRIEFING/CustomerCollection?sap-client=001&$format=xml&search
返回所有的Customer信息，Customer node的property就是在figure1里面看到的那些。
Search 所有name property中包含“UT_Customer” 的Customer
http://ldcigm2.jerry.corp:50018/sap/opu/sdata/sap/CUSTOMER_BRIEFING/CustomerCollection?sap-client=001&$format=xml&search=UT_Customer
返回Partner ID = 133的customer的detail 信息
http://ldcigm2.jerry.corp:50018/sap/opu/sdata/sap/CUSTOMER_BRIEFING/CustomerCollection(133)?sap-client=001&$format=xml
所有这些操作都在service provider class CL_LWM_CB_ADAPTER_RDP里面实现，
如果我们直接在IE里面通过http://ldcigm2.jerry.corp:50018/sap/opu/sdata/sap/CUSTOMER_BRIEFING/CustomerCollection(133)?sap-client=001&$format=xml
的URL consume OData service：
Gateway 系统上首先会根据OData service expose出来的external name找到internal使用的service ID:
然后根据service ID找到对应的CRM 系统的destination：
通过RFC直接call CRM系统上的一个remote function module：
在CRM的这个FM上设个断点，发现断点已经被触发了。
要获取更多Jerry的原创文章，请关注公众号"汪子熙":
