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Create a Data Access Object for SAP Data using JDBI
A brief overview of creating a SQL Object API for SAP data in JDBI.
JDBI is a SQL convenience library for Java that exposes two different style APIs, a fluent style and a SQL object style. The CData JDBC Driver for SAP integrates connectivity to live SAP data in Java applications. By pairing these technologies, you gain simple, programmatic access to SAP data. This article walks through building a basic Data Access Object (DAO) and the accompanying code to read SAP data.
About SAP Data Integration
CData provides the easiest way to access and integrate live data from SAP. Customers use CData connectivity to:
- Access every edition of SAP, including SAP R/3, SAP NetWeaver, SAP ERP / ECC 6.0, and SAP S/4 HANA on premises data that is exposed by the RFC.
- Perform actions like sending IDoc or IDoc XML files to the server and creating schemas for functions or queries through SQL stored procedures.
-
Connect optimally depending on where a customer's SAP instance is hosted.
- Customers using SAP S/4HANA cloud public edition will use SAP NetWeaver Gateway connectivity
- Customers using SAP S/4HANA private edition will use either SAP ERP or SAP NetWeaver Gateway connectivity.
While most users leverage our tools to replicate SAP data to databases or data warehouses, many also integrate live SAP data with analytics tools such as Tableau, Power BI, and Excel.
Getting Started
Create a DAO for the SAP MARA Entity
The interface below declares the desired behavior for the SQL object to create a single method for each SQL statement to be implemented.
public interface MyMARADAO {
//request specific data from SAP (String type is used for simplicity)
@SqlQuery("SELECT MBRSH FROM MARA WHERE ERNAM = :eRNAM")
String findMBRSHByERNAM(@Bind("eRNAM") String eRNAM);
/*
* close with no args is used to close the connection
*/
void close();
}
Open a Connection to SAP
Collect the necessary connection properties and construct the appropriate JDBC URL for connecting to SAP.
The driver supports connecting to an SAP system using the SAP Java Connector (SAP JCo). Install the files (sapjco3.jar and sapjco3.dll) to the appropriate directory for the hosting application or platform. See the "Getting Started" chapter in the help documentation for information on using the SAP JCo files.
In addition, you can connect to an SAP system using Web services (SOAP). To use Web services, you must enable SOAP access to your SAP system and set the Client, RFCUrl, User, and Password properties, under the Authentication section.
For more information, see this guide on obtaining the connection properties needed to connect to any SAP system.
Built-in Connection String Designer
For assistance in constructing the JDBC URL, use the connection string designer built into the SAP JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.
java -jar cdata.jdbc.saperp.jar
Fill in the connection properties and copy the connection string to the clipboard.
A connection string for SAP will typically look like the following:
jdbc:saperp:Host=sap.mydomain.com;User=EXT90033;Password=xxx;Client=800;System Number=09;ConnectionType=Classic;Location=C:/mysapschemafolder;
Use the configured JDBC URL to obtain an instance of the DAO interface. The particular method shown below will open a handle bound to the instance, so the instance needs to be closed explicitly to release the handle and the bound JDBC connection.
DBI dbi = new DBI("jdbc:saperp:Host=sap.mydomain.com;User=EXT90033;Password=xxx;Client=800;System Number=09;ConnectionType=Classic;Location=C:/mysapschemafolder;");
MyMARADAO dao = dbi.open(MyMARADAO.class);
//do stuff with the DAO
dao.close();
Read SAP Data
With the connection open to SAP, simply call the previously defined method to retrieve data from the MARA entity in SAP.
//disply the result of our 'find' method
String mBRSH = dao.findMBRSHByERNAM("BEHRMANN");
System.out.println(mBRSH);
Since the JDBI library is able to work with JDBC connections, you can easily produce a SQL Object API for SAP by integrating with the CData JDBC Driver for SAP. Download a free trial and work with live SAP data in custom Java applications today.
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SAP ERP JDBC Driver
Straightforward SAP ERP integration. Now accessing SAP RFC's from any JDBC client is as easy as querying a database.
