/**
* ABAP APIs often uses complex parameters. This example demonstrates how to read the values from
* a structure.
*
* @throws com.sap.conn.jco.JCoException
*/
public static void step3WorkWithStructure() throws JCoException {
JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED);
JCoFunction function = destination.getRepository().getFunction("RFC_SYSTEM_INFO");
if (function == null) throw new RuntimeException("RFC_SYSTEM_INFO not found in SAP.");
try {
function.execute(destination);
} catch (AbapException e) {
System.out.println(e.toString());
return;
}
JCoStructure exportStructure = function.getExportParameterList().getStructure("RFCSI_EXPORT");
System.out.println("System info for " + destination.getAttributes().getSystemID() + ":\n");
// The structure contains some fields. The loop just prints out each field with its name.
for (int i = 0; i < exportStructure.getMetaData().getFieldCount(); i++) {
System.out.println(
exportStructure.getMetaData().getName(i) + ":\t" + exportStructure.getString(i));
}
System.out.println();
// JCo still supports the JCoFields, but direct access via getXXX is more efficient as field
// iterator
System.out.println(
"The same using field iterator: \nSystem info for "
+ destination.getAttributes().getSystemID()
+ ":\n");
for (JCoField field : exportStructure) {
System.out.println(field.getName() + ":\t" + field.getString());
}
System.out.println();
}
/**
* This example demonstrates the destination concept introduced with JCO 3. The application does
* not deal with single connections anymore. Instead it works with logical destinations like
* ABAP_AS and ABAP_MS which separates the application logic from technical configuration.
*
* @throws com.sap.conn.jco.JCoException
*/
public static void step1Connect() throws JCoException {
JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS);
System.out.println("Attributes:");
System.out.println(destination.getAttributes());
System.out.println();
destination = JCoDestinationManager.getDestination(ABAP_MS);
System.out.println("Attributes:");
System.out.println(destination.getAttributes());
System.out.println();
}
/**
* This example uses a connection pool. However, the implementation of the application logic is
* still the same. Creation of pools and pool management are handled by the JCo runtime.
*
* @throws com.sap.conn.jco.JCoException
*/
public static void step2ConnectUsingPool() throws JCoException {
JCoDestination destination = JCoDestinationManager.getDestination(ABAP_AS_POOLED);
destination.ping();
System.out.println("Attributes:");
System.out.println(destination.getAttributes());
System.out.println();
}
