3 OC4J Deployment and Integration

Adapter Integration with OC4J

OracleAS Adapter for SAP is deployed within an OC4J container during installation. All client applications run within the OC4J environment. In J2CA deployment, the Common Client Interface (CCI) integrates an OC4J client application with a resource adapter.

Deployment of Adapter

Figure 3-1 shows deployment of the J2CA Connector to the Oracle Application Server. In a runtime service scenario, an Enterprise Java Bean (EJB), servlet, or Java program client makes CCI calls to J2CA resource adapters. The adapters process the calls as requests and send them to the EIS. The EIS response is then sent back to the client.

Updating Adapter Configuration

During the J2CA deployment of OracleAS Adapter for SAP, OC4J generates a deployment descriptor called oc4j-ra.xml, located in OC4J_home\integration\orabpel\system\appserver\oc4j\j2ee\home\application-deployments\default\iwafjca.

Creating a Managed Connector Factory Object

The oc4j-ra.xml descriptor provides OC4J-specific deployment information for resource adapters. For example, the default jca_sample configuration in Application Explorer is represented in the oc4j-ra.xml file as follows:

<?xml version="1.0"?><!DOCTYPE oc4j-connector-factories PUBLIC "-//Oracle//DTD Oracle Connector >
9.04//EN" "http://xmlns.oracle.com/ias/dtds/oc4j-connector-factories-9_04.dtd"
<oc4j-connector-factories>
	   <connector-factory location="eis/OracleJCAAdapter/DefaultConnection" connector-name="IWAFJCA10">
		   <config-property name="IWayHome" value="../../adapters/application"/>
		   <config-property name="IWayConfig" value="jca_sample"/>
   		<config-property name="IWayRepoURL" value=""/>
   		<config-property name="IWayRepoUser" value=""/>
   		<config-property name="IWayRepoPassword" value=""/>
   		<config-property name="logLevel" value="debug"/>
   	</connector-factory>
</oc4j-connector-factories>

The parameters defined in the oc4j-ra.xml file are described in the following table:

Creating Multiple Managed Connector Factory Objects

To establish multiple managed connector factory objects, you must edit the oc4j-ra.xml file and add more <connector-factory> nodes. For example, the default jca_sample configuration in Application Explorer is represented in the oc4j-ra.xml file as follows:

<?xml version="1.0"?><!DOCTYPE oc4j-connector-factories PUBLIC "-//Oracle//DTD Oracle Connector 
9.04//EN" "http://xmlns.oracle.com/ias/dtds/oc4j-connector-factories-9_04.dtd">
<oc4j-connector-factories>
	   <connector-factory location="eis/OracleJCAAdapter/DefaultConnection" connector-name="IWAFJCA10">
		   <config-property name="IWayHome" value="../../adapters/application"/>
		   <config-property name="IWayConfig" value="jca_sample"/>
   		<config-property name="IWayRepoURL" value=""/>
   		<config-property name="IWayRepoUser" value=""/>
   		<config-property name="IWayRepoPassword" value=""/>
   		<config-property name="logLevel" value="debug"/>
   	</connector-factory>
</oc4j-connector-factories>

To create multiple managed connector factory objects, you must add new <connector-factory> nodes in the file. For example:

<?xml version="1.0"?><!DOCTYPE oc4j-connector-factories PUBLIC "-//Oracle//DTD Oracle Connector 
9.04//EN" "http://xmlns.oracle.com/ias/dtds/oc4j-connector-factories-9_04.dtd">
<oc4j-connector-factories>
   <connector-factory location="eis/OracleJCAAdapter/DefaultConnection1" connector-name="IWAFJCA10">
   <config-property name="IWayHome" value="../../adapters/application"/>
   <config-property name="IWayConfig" value="jca_sample"/>
   <config-property name="IWayRepoURL" value=""/>
   <config-property name="IWayRepoUser" value=""/>
   <config-property name="IWayRepoPassword" value=""/>
   <config-property name="logLevel" value="debug"/>
   </connector-factory>
<connector-factory location="eis/OracleJCAAdapter/DefaultConnection2" connector-name="IWAFJCA10">
		   <config-property name="IWayHome" value="../../adapters/application"/>
		   <config-property name="IWayConfig" value="jca_sample2"/>
		   <config-property name="IWayRepoURL" value=""/>
		   <config-property name="IWayRepoUser" value=""/>
   		<config-property name="IWayRepoPassword" value=""/>
		   <config-property name="logLevel" value="debug"/>
	   </connector-factory>
</oc4j-connector-factories>

How to Write a Java Application Client Using the CCI API

The following example shows the code structure for using CCI with packaged application adapters. The code sample is shown in four steps.

Step 1. Obtain the Connection Factory

The connection factory is obtained by JNDI lookup.

InitialContext context = new InitialContext();
ConnectionFactory cf = (ConnectionFactory)context.lookup(iwayJndi)

Step 2. Obtaining a Connection for the Adapter

IWAFConnectionSpec is an implementation of ConnectionSpec used for creating a design time or runtime service adapter connection. The ConnectionSpec has seven parameters. Connection Pooling is fully supported and established based on these parameters, except log level.

The iWAFConnectionSpec can be made to initiate an interaction with SAP by specifying the adapter name and configuration parameters in the ConnectionSpec. For example,

iWAFConnectionSpec cs = new IWAFConnectionSpec();
	  cs.setAdapterName(ADAPTER); 
	  cs.setConfig(TARGET);
	  cs.setLogLevel(LOG_LEVEL);  // Adapter layer log level
	  Connection c = cf.getConnection(cs);// where cf is the connection factory

In this snippet, ADAPTER and TARGET refer to the adapter being deployed and the name of a target defined in Application Explorer, respectively. See "Complete Code Sample" for more information.

Step 3. Create Interaction with InteractionSpec for Runtime

Interaction i = c.createInteraction();
	  IWAFInteractionSpec is = new IWAFInteractionSpec();
	  is.setFunctionName(IWAFInteractionSpec.PROCESS);

Two functions can be set: PROCESS and IWAE. PROCESS is used at runtime. IWAE is used when you are using the IAEAdapter at design time.

Step 4. Create Input Record and Execute Interaction

In this case, to complete the EIS invocation, an SAP RFC message is referenced. The schema is provided by Application Explorer.

A standard J2CA Indexed Record is used in this example:

// Use JCA IndexRecord, named "input" for runtime processing.
		IndexedRecord rIn = cf.getRecordFactory().createIndexedRecord("input");
		rIn.add(msg_run);
	  IndexedRecord rOut = (IndexedRecord)i.execute(is, rIn);
		System.out.println((String)rOut.get(0));

A special record is supported in this example:

//IWAFRecord rIn = new IWAFRecord("input");
		//rIn.setRootXML(msg_run);						
		//IWAFRecord response = executeRunInteraction(c, rIn);
	  //IWAFRecord rOut = (IWAFRecord)i.execute(is, rIn);
		//System.out.println(rOut.getRootXML());

Where msg_run is an instance XML document generated from the schema created by Application Explorer. For example, the following is a sample SAP request XML document.

<?xml version="1.0" encoding="UTF-8"?>
<BAPI_CUSTOMER_GETDETAIL2>
<COMPANYCODE></COMPANYCODE>
<CUSTOMERNO>0000401026</CUSTOMERNO>
</BAPI_CUSTOMER_GETDETAIL2>

Complete Code Sample

The following is a sample of the complete code:

import javax.resource.cci.*;
import com.ibi.afjca.cci.*;
import com.ibi.afjca.spi.*;
 
/**
 * The purpose of this sample is to illustrate how to use the IWAF Universal
 * JCA connector.
 * 
 */
public class IWAFJCASimple {
  
	private static String  HOME 	   = "c:/iway/xfoc/components/iwafcont/dist";
	private static String  CONFIG    = "base"; 
	private static String  LOG_LEVEL = "FATAL";
	
	private static String ADAPTER = "SAP";
	private static String TARGET  = "SAP_connection";
	
	// Input Message
	private static String msg_run = "<SAP/>";
	
  public static void main(String[] args) throws Exception {
		
		// 1. Getting the Connection factory through JNDI lookup
		// ---------------------------------------------------------
	  InitialContext context = new InitialContext();
	  ConnectionFactory cf = (ConnectionFactory)context.lookup(iwayJndi)
	  // 2. Getting a connection for a particular adapter target, in this case SAP
		// ---------------------------------------------------------
	  IWAFConnectionSpec cs = new IWAFConnectionSpec();
	  cs.setAdapterName(ADAPTER); 
	  cs.setConfig(TARGET);
	  cs.setLogLevel(LOG_LEVEL);  // Adapter layer log level
	  Connection c = cf.getConnection(cs);// where cf is the connection factory
 
	  // 3. Create interaction with interactionSpec for RUNTIME 
		// ---------------------------------------------------------
	  Interaction i = c.createInteraction();
	  IWAFInteractionSpec is = new IWAFInteractionSpec();
	  is.setFunctionName("PROCESS"); 
 
	  // 4. Create input Record and execute interaction
		// ---------------------------------------------------------
 
	  // 4.1 Using JCA standard Indexed Record
		// Use JCA IndexRecord, named "input" for runtime processing.
		IndexedRecord rIn = cf.getRecordFactory().createIndexedRecord("input");
		rIn.add(msg_run);
	  IndexedRecord rOut = (IndexedRecord)i.execute(is, rIn);
		System.out.println((String)rOut.get(0));
	  
	  // 4.2 Our own Record is supported here
		//IWAFRecord rIn = new IWAFRecord("input");
		//rIn.setRootXML(msg_run);		
		//IWAFRecord response = executeRunInteraction(c, rIn);
	  //IWAFRecord rOut = (IWAFRecord)i.execute(is, rIn);
		//System.out.println(rOut.getRootXML());
		
  } // main()
	  
}