Spring Boot SAP Synchronous RFC Server Endpoint Quick Start
=======================================================================================================================
**Demonstrates the sap-srfc-server component running in a spring boot camel runtime.**   
![SAP Tool Suite](../../sap_tool_suite.png "SAP Tool Suite")

***
Author: William Collins - Fuse Team  
Level: Beginner  
Technologies: SAP, Camel, Spring  
Summary: This quickstart demonstrates how to configure and use the sap-srfc-server component in a Spring Boot Camel environment to handle a remote function call from SAP. This component handles a remote function call from SAP using the *Synchronous RFC* (sRFC) protocol.       
Target Product: Red Hat Build of Camel Spring Boot
Source: <http://github.com/jboss-fuse/sap-quickstarts/>

***

What is it?  
-----------  

This quick start shows how to integrate Apache Camel with SAP using the JBoss Fuse SAP Synchronous Remote Function Call Server Camel component. This component and its endpoints should be used in cases where a Camel route is required to synchronously handle requests from and responses to an SAP system.  

This quick start handles requests from SAP for the `GetList` method of the `FlightCustomer` BAPI to query for Customer records in the Flight Data Application. The route of this quick start simply mocks the behavior of this method by returning a fixed response of Customer records. The `sap-srfc-server` endpoint at the beginning of the route consumes a request from SAP and its contents is placed into the message body of the exchange's message. The request is then logged to the console. A processor bean then builds a response message for the BAPI method which contains a fixed set of customer records. It then replaces the message body of the exchange's message with this response. The response is then logged to the console. The `sap-srfc-server`  endpoint then sends the response message back to the caller in SAP.  

**NOTE** The sRFC protocol used by this component delivers requests and responses from and to an SAP system **BEST-EFFORT**. When an SAP system experiences a communication error when sending a request to or receiving a response from this component, it will be *in doubt* whether the processing of a remote function call in Camel was successful. For the guaranteed delivery and processing of requests in Camel please see the JBoss Fuse SAP Transactional Remote Function Call Server Camel component.     

In studying this quick start you will learn:

* How to configure the Camel runtime environment in order to deploy the JBoss Fuse SAP Synchronous Remote Function Call Server Camel component. 
* How to define a Camel route containing the JBoss Fuse SAP Synchronous Remote Function Call Server Camel component using the Spring XML syntax.
* How to use the JBoss Fuse SAP Synchronous Remote Function Call Server Camel component to handle requests from SAP. 
* How to configure connections used by the component.

For more information see:

* <https://access.redhat.com/documentation/en-us/red_hat_fuse/7.0/html-single/apache_camel_component_reference/#SAP> for more information about the JBoss Fuse SAP Camel components 
* <https://access.redhat.com/products/red-hat-fuse> for more information about using JBoss Fuse

System requirements
-------------------

Before building and running this quick start you will need:

* Maven 3.6.2 or higher
* JDK 11
* Red Hat Build of Camel Spring Boot
* SAP JCo3 and IDoc3 libraries (sapjco3.jar, sapidoc3.jar and JCo native library for your OS platform)
* SAP instance with [Flight Data Application](http://help.sap.com/saphelp_erp60_sp/helpdata/en/db/7c623cf568896be10000000a11405a/content.htm) setup.

Configuring the Quickstart for your environment
-----------------------------------------------

To configure the quick start for your environment: 

1. Deploy the JCo3 library jar and native library (for your platform) and IDoc3 library jar to the `lib` folder of the project.
2. Ensure that the **SAP Instance Configuration Configuration Parameters** in the parent pom.xml file (`../../.pom.xml`) of quick starts project has been set to match the connection configuration for your SAP instance.  
3. Ensure the destination `QUICKSTART` has been defined in your SAP instance:   
	a. Using the SAP GUI, run transaction `SM59` (RFC Destinations).    
    b. Create a new destination (Edit > Create):  
		1. **RFC Destination** : `QUICKSTART`.    
        2. **Connection Type** : `T`.    
        3. **Technical Settings** :    
            i. **Activation Type** : `Registered Server Program`.    
            ii.**Program ID** : `QUICKSTART`.   
        4. **Unicode**:   
        	i. **Communication Type with Target System** : `Unicode`   
4. Ensure the following `ZBAPI_FLCUST_GETLIST` ABAP program is installed and activated in your SAP client:  

			*&---------------------------------------------------------------------*
			*& Report  ZBAPI_FLCUST_GETLIST
			*&
			*&---------------------------------------------------------------------*
			*&
			*&
			*&---------------------------------------------------------------------*
			
			REPORT  ZBAPI_FLCUST_GETLIST.
			
			
			DATA: RFCDEST LIKE RFCDES-RFCDEST VALUE 'NONE'.
			
			
			DATA: RFC_MESS(128).
			
			
			DATA: CUSTOMER_DATA LIKE BAPISCUDAT,
			      IT_CUSTOMER_LIST TYPE STANDARD TABLE OF BAPISCUDAT.
			
			DATA: IT_RETURN TYPE STANDARD TABLE OF BAPIRET2,
			      RETURN TYPE BAPIRET2.
			
			RFCDEST = 'QUICKSTART'.
			
			CALL FUNCTION 'BAPI_FLCUST_GETLIST'
			  DESTINATION RFCDEST
			  TABLES
			    CUSTOMER_LIST = IT_CUSTOMER_LIST
			    RETURN = IT_RETURN.
			
			IF SY-SUBRC NE 0.
			
			WRITE: / 'Call ZBAPI_FLCUST_GETLIST SY-SUBRC = ', SY-SUBRC.
			WRITE: / RFC_MESS.
			
			ELSE.
			
			WRITE: / 'CUSTOMER_LIST:'.
			ULINE.
			
			WRITE: /5 'CUSTOMERID', 16 'FORM', 30 'CUSTNAME', 55 'STREET', 85 'POSTCODE', 95 'CITY', 120 'COUNTR', 127 'PHONE', 157 'EMAIL'.
			
			LOOP AT IT_CUSTOMER_LIST INTO CUSTOMER_DATA.
			
			WRITE: /5 CUSTOMER_DATA-CUSTOMERID, 16 CUSTOMER_DATA-FORM, 30 CUSTOMER_DATA-CUSTNAME, 55 CUSTOMER_DATA-STREET, 85 CUSTOMER_DATA-POSTCODE, 95 CUSTOMER_DATA-CITY, 120 CUSTOMER_DATA-COUNTR, 127 CUSTOMER_DATA-PHONE, 157 CUSTOMER_DATA-EMAIL.
			
			ENDLOOP.
			
			WRITE: / 'RETURN:'.
			ULINE.
			
			WRITE: /5 'TYPE', 20 'ID', 40 'MESSAGE'.
			
			LOOP AT IT_RETURN INTO RETURN.
			
			WRITE: /5 RETURN-TYPE, 20 RETURN-ID, 40 RETURN-MESSAGE.
			
			ENDLOOP.
			ENDIF.

Build and Run the Quickstart
----------------------------

To build and run the quick start:

1. Change your working directory to the `sap-srfc-server-spring-boot` directory.
* Run `mvn clean install` to build the quick start.
* Run `mvn spring-boot:run` to start the Camel runtime.
* Invoke the camel route from SAP by running the `ZBAPI_FLCUST_GETLIST` program.
* In the console observe the request and response received and returned by the endpoint.  
* Compare this response with the received data displayed by the ABAP program.   

Stopping the Quickstart
-----------------------

To stop the camel run-time:

1. Enter Ctrl-c in the console.

