SAP Cloud for Customer的 HTML Mashup渲染原理
HTMLContainer:
sHtmlContent就是之前在SAP C4C mashup编辑页面维护的html代码:
MashupServerUri:“https://mashup-cn.sapbydesignmashups.cn”
“https://mashup-cn.sapbydesignmashups.cn/mashups/html/container.html”
拿到iframe dom:
setSourceUri之后重新渲染:
进入_endRenderHtml:
sMessage的值:
观察到一个HTTP post操作:
场景:SAP云平台上的两个ABAP系统实例,一个作为数据的提供者-provision system;另一个作为数据的消费者 - client system,后者从前者读取数据,并显示
实现步骤概述:
(1) client System创建outbound communication.
(2) 在provision系统创建inbound communication.
(3) Create a Service Consumption Model, and save this locally as a $metadata XML file; From this you will create proxy artefacts in the client system, representing the remote service, and use this model to generate an abstract entity.
(4) 创建一个remote client proxy
(5) 在client System创建一个OData服务,使用Fiori Elements消费并展示从provision系统取回的数据
SAP标准发布的Communication Scenario SAP_COM_0276,提供了SAP Cloud Platform ABAP实例同远端的ABAP On-Premises系统或者第三方系统集成的可能性。
A communication arrangement specifies the metadata for a specific communication scenario, such as your host system and the authentication method. This metadata is contained in a service key. You can then define one or more specific destinations for this arrangement.
Communication Arrangement为Communication Scenario指定了必须的元数据,包括通信系统和消息认证方式等信息,这些元数据以Service key的形式存储。可以基于Communication Arrangement创建Destination.
在SAP云平台CloudFoundry环境里创建一个Destination服务实例:
基于这个Destination服务创建一个新的Destination实例:
url字段维护成provision System的url,确保连接能够成功建立。
给Destination service创建一个新的service key,将其内容保存在本地:
在client System上打开ABAP service instance的dashboard:
在Communication Arrangement tile里,创建一个新的实例:
从Communication Scenario下拉列表里,选择之前介绍的SAP_COM_0276: SAP CP CF Destination Service integration:
选择好Communication Scenario后,维护Communication Arrangement的名称,比如OUTBOUND_XXX.
在Communication Arrangement的additional properties里,将service instance name的值从默认值OUTBOUND_XXX改成更便于记忆的值,比如Outbound-For-Tutorials_XXX.
最后一步,在ABAP client System上创建ABAP 实现类:
CLASS ZCL_OUTPUT_HTTP_XXX DEFINITION
PUBLIC
FINAL
CREATE PUBLIC .
PUBLIC SECTION.
INTERFACES if_oo_adt_classrun.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS ZCL_OUTPUT_HTTP_XXX IMPLEMENTATION.
METHOD if_oo_adt_classrun~main.
TRY.
DATA(lo_destination) = cl_http_destination_provider=>create_by_cloud_destination(
i_name = 'A4C_ACCESS_XXX_HTTP'
i_service_instance_name = 'Outbound-For-Tutorial-XXX'
i_authn_mode = if_a4c_cp_service=>service_specific ).
DATA(lo_http_client) = cl_web_http_client_manager=>create_by_http_destination( i_destination = lo_destination ).
DATA(lo_request) = lo_http_client->get_http_request( ).
DATA(lo_response) = lo_http_client->execute( i_method = if_web_http_client=>get ).
out->write( lo_response->get_text( ) ).
CATCH cx_root INTO DATA(lx_exception).
out->write( lx_exception->get_text( ) ).
ENDTRY.
ENDMETHOD.
ENDCLASS.
第18行的参数i_name的值,就是之前在SAP Cloud Platform里创建的Destination名称。
i_service_instance_name, 就是创建的Communication Arrangement additional properties里创建的Service instance name的值。
执行ABAP类,测试结果如下:
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