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Example: Using the Java Management Extensions API to create a JDBC driver and data source for a CMP bean

 

This code sample demonstrates how to configure a JDBC provider and data source, designate the data source for use with CMP beans, set an authorization alias for the data source, and reload the Mbean to make configuration changes.

//
// "This program may be used, executed, copied, modified and distributed 
// without royalty for the purpose of developing, using, marketing, or 
// distributing."
//
// Product 5630-A36,  (C) COPYRIGHT International Business Machines 
// Corp., 2001, 2002
// All Rights Reserved * Licensed Materials - Property of IBM
// import java.util.*; import javax.sql.*; import javax.transaction.*; import javax.management.*;
 import com.ibm.websphere.management.*; import com.ibm.websphere.management.configservice.*; import com.ibm.ws.exception.WsException;


/**
 * Creates a node scoped resource.xml entry for a DB2 XA datasource.
 * The datasource created is for CMP use.
 * 
* We need following to run
 * set classpath=%classpath%;D:\WebSphere\AppServer\lib\wsexception.jar;
      D:\WebSphere\AppServer\lib\wasjmx.jar;D:\$WAS_HOME\lib\wasx.jar
  */ public class CreateDataSourceCMP {

   String dsName = "markSection"; // ds display name , also jndi name and 
    CF name
   String dbName = "SECTION";     // database name
   String authDataAlias = "db2admin"; // an authentication data alias
   String uid = "db2admin";           // userid
   String pw  = "db2admin";           //  password
   String dbclasspath = "D:/SQLLIB/java/db2java.zip"; // path to the db driver




   /**
    * Main method.
    */
   public static void main(String[] args) {
      CreateDataSourceCMP cds = new CreateDataSourceCMP();

      try {
         cds.run(args);
      } catch (com.ibm.ws.exception.WsException ex) {
         System.out.println("Caught this " + ex   );
         ex.printStackTrace();
         //ex.getCause().printStackTrace();
      } catch (Exception ex) {
         System.out.println("Caught this " + ex );
         ex.printStackTrace();
      }   }


   /**
    * This method creates the datasource using JMX.
* The datasource created here is only written into resources.xml. 
    * It is not bound into namespace until the server is restarted, or 
        an application started
    */
   public void run(String[] args) throws Exception {

      try {
         // Initialize the AdminClient.
         Properties adminProps = new Properties();
         adminProps.setProperty(AdminClient.CONNECTOR_TYPE, 
          AdminClient.CONNECTOR_TYPE_SOAP);
         adminProps.setProperty(AdminClient.CONNECTOR_HOST, "localhost");
         adminProps.setProperty(AdminClient.CONNECTOR_PORT, "8880");
         AdminClient adminClient = 
              AdminClientFactory.createAdminClient(adminProps);

         // Get the ConfigService implementation.      
         com.ibm.websphere.management.configservice.ConfigServiceProxy 
           configService =
         new com.ibm.websphere.management.configservice.
                ConfigServiceProxy(adminClient);

         Session session = new Session();

         // Use this group to add to the node scoped resource.xml.
         ObjectName node1 = ConfigServiceHelper.createObjectName(null, 
                "Node", null);
         ObjectName[] matches = configService.queryConfigObjects(session, 
              null, node1, null);
         node1 = matches[0];     // use the first node found

         // Use this group to add to the server1 scoped resource.xml.
         ObjectName server1 = ConfigServiceHelper.createObjectName(null,
                 "Server", "server1");
         matches = configService.queryConfigObjects(session, null, server1,
                null);
         server1 = matches[0];   // use the first server found

         // Create the JDBCProvider
         String providerName = "DB2 JDBC Provider (XA)";
         System.out.println("Creating JDBCProvider " + providerName );

         // Prepare the attribute list
         AttributeList provAttrs = new AttributeList();
         provAttrs.add(new Attribute("name", providerName));
         provAttrs.add(new Attribute("implementationClassName",
                 "COM.ibm.db2.jdbc.DB2XADataSource"));
         provAttrs.add(new Attribute("description","DB2 JDBC2-compliant 
                      XA Driver"));

         //create it 
         ObjectName jdbcProv = configService.createConfigData(session,node1,
                 "JDBCProvider", "resources.jdbc:JDBCProvider",provAttrs);
         // now plug in the classpath configService.addElement(session,jdbcProv,"classpath",dbclasspath,-1);


// Search for RRA so we can link it to the datasource 
         ObjectName rra = ConfigServiceHelper.createObjectName(null, 
                 "J2CResourceAdapter", null);
         matches = configService.queryConfigObjects(session, node1, rra,
                  null);
         rra = matches[0]; // use the first J2CResourceAdapter segment for 
                  builtin_rra

         // Prepare the attribute list
         AttributeList dsAttrs = new AttributeList();
         dsAttrs.add(new Attribute("name", dsName));
         dsAttrs.add(new Attribute("jndiName", "jdbc/" + dsName));
         dsAttrs.add(new Attribute("datasourceHelperClassname",
              "com.ibm.websphere.rsadapter.DB2DataStoreHelper"));
         dsAttrs.add(new Attribute("statementCacheSize", new Integer(10)));
         dsAttrs.add(new Attribute("relationalResourceAdapter", rra)); 
         // this is where we make the link to "builtin_rra"
         dsAttrs.add(new Attribute("description", "JDBC Datasource for 
             mark section CMP 2.0 test"));
         dsAttrs.add(new Attribute("authDataAlias",authDataAlias));

         // Create the datasource
         System.out.println("  **  Creating datasource");
         ObjectName dataSource = 
             configService.createConfigData(session,jdbcProv,"DataSource",
               "resources.jdbc:DataSource",dsAttrs);

         // Add a propertySet.
         AttributeList propSetAttrs = new AttributeList();
         ObjectName resourcePropertySet =
           configService.createConfigData(session,dataSource,"propertySet",
               "",propSetAttrs);

         // Add resourceProperty databaseName
         AttributeList propAttrs1 = new AttributeList();
         propAttrs1.add(new Attribute("name", "databaseName"));
         propAttrs1.add(new Attribute("type", "java.lang.String"));
         propAttrs1.add(new Attribute("value", dbName));

         configService.addElement(session,resourcePropertySet,
              "resourceProperties",propAttrs1,-1);


// Now Create the corresponding J2CResourceAdapter Connection Factory object.
         ObjectName jra = ConfigServiceHelper.createObjectName(null,
             "J2CResourceAdapter",null);

         // Get all the J2CResourceAdapter, and I want to add my datasource 
         System.out.println("  **  Get all J2CResourceAdapter's");
         ObjectName[] jras = configService.queryConfigObjects(session, node1,
                jra, null);

         int i=0;

         for (;i< jras.length;i++) {
            System.out.println(ConfigServiceHelper.getConfigDataType(jras[i])+
                    " " + i + " = " 
                               + jras[i].getKeyProperty(SystemAttributes.
                                 _WEBSPHERE_CONFIG_DATA_DISPLAY_NAME)
                               + "\nFrom scope =" 
                               + jras[i].getKeyProperty(SystemAttributes.
                                _WEBSPHERE_CONFIG_DATA_ID));
            // quit on the first builtin_rra
            if (jras[i].getKeyProperty(SystemAttributes.
                                _WEBSPHERE_CONFIG_DATA_DISPLAY_NAME)
                .equals("WebSphere Relational Resource Adapter")) {
               break;
            }
         }


         if (i >= jras.length) {
            System.out.println("Did not find builtin_rra J2CResourceAdapter
                object creating CF anyways" );
         } else {
            System.out.println("Found builtin_rra J2CResourceAdapter 
                   object at index " + i + " creating CF" );
         }

         // Prepare the attribute list
         AttributeList cfAttrs = new AttributeList();
         cfAttrs.add(new Attribute("name", dsName + "_CF"));
         cfAttrs.add(new Attribute("authMechanismPreference","BASIC_PASSWORD"));
         cfAttrs.add(new Attribute("authDataAlias",authDataAlias));
         cfAttrs.add(new Attribute("cmpDatasource", dataSource ));  
         // this is where we make the link to DataSource's xmi:id
         ObjectName cf = configService.createConfigData(session,jras[i],
         "CMPConnectorFactory", "resources.jdbc:CMPConnectorFactory",cfAttrs);


         // ===== start Security section
         System.out.println("Creating an authorization data alias " + 
            authDataAlias);

 // Find the parent security object
         ObjectName security = ConfigServiceHelper.createObjectName(null,
              "Security", null);
         ObjectName[] securityName = configService.queryConfigObjects(session,
                null, security, null);
         security=securityName[0];

         // Prepare the attribute list
         AttributeList authDataAttrs = new AttributeList();
         authDataAttrs.add(new Attribute("alias", authDataAlias));
         authDataAttrs.add(new Attribute("userId", uid));
         authDataAttrs.add(new Attribute("password", pw));
         authDataAttrs.add(new Attribute("description","Auto created alias
             for datasource"));

         //create it 
         ObjectName authDataEntry = configService.createConfigData
            (session,security,"authDataEntries", "JAASAuthData",authDataAttrs);
         // ===== end Security section

         // Save the session
         System.out.println("Saving session" );
         configService.save(session, false);

         // reload resources.xml to bind the new datasource into the name space
         reload(adminClient,true);
      } catch (Exception ex) {
         ex.printStackTrace(System.out);
         throw ex;
      }   }

   /**
    * Get the DataSourceConfigHelperMbean and call reload() on it
    * 
    * @param adminClient
    * @param verbose true - print messages to stdout
    */
   public void reload(AdminClient adminClient,boolean verbose) {
      if (verbose) {
         System.out.println("Finding the Mbean to call reload()");
      }

      // First get the  Mbean
      ObjectName handle = null;
      try {
         ObjectName queryName = new ObjectName("WebSphere:type=
                 DataSourceCfgHelper,*");
         Set s = adminClient.queryNames(queryName, null);
         Iterator iter = s.iterator();
         if (iter.hasNext()) handle = (ObjectName)iter.next();
      } catch (MalformedObjectNameException mone) {
         System.out.println("Check the program variable queryName" + mone);
      } catch (com.ibm.websphere.management.exception.ConnectorException ce) {
         System.out.println("Cannot connect to the appserver" + ce);
      }

      if (verbose) {
         System.out.println("Calling reload()");
      }
      Object result = null;
      try {
         result = adminClient.invoke(handle, "reload", new Object[] {}, 
               new String[] {});
      } catch (MBeanException mbe) {
         if (verbose) {
            System.out.println("\tMbean Exception calling reload" + mbe);
         }
      } catch (InstanceNotFoundException infe) {
         System.out.println("Cannot find reload ");
      } catch (Exception ex) {
         System.out.println("Exception occurred calling reload()"  + ex);
      }

      if (result==null && verbose) {
         System.out.println("OK reload()");
      }   }

}



 

Related concepts


Resource adapters
JDBC providers
Data sources

 

Reference topic