[jboss-user] [JCA/JBoss] - Re: SQL Trace output concern with mapped DS

[wcydaip]

Weston,

Thanks for the reply.

The AppHelper works like a ServiceLocator.  One place to call and get whichever ds is needed.  I added the Singleton thought it made sense. :)

I began caching the ds references early on and realized that was a bad choice, so, the reset is basically an old call that I never changed. 

Here's the AppHelper with the excluded methods:

  |    public static synchronized AppHelper getInstance() {     
  | 	logger.debug("entering getInstance()");   	
  | 	   appHelperInstance = (null == appHelperInstance) ? 
  | 		   new AppHelper() : appHelperInstance;
  | 	logger.debug("leaving getInstance()");
  | 	   return appHelperInstance;
  |    }
  |    
  |    private AppHelper(){   		
  |    		logger.debug("creating the AppHelper Singleton");
  |    		logger.debug("leaving AppHelper Singleton");
  |    }
  |    
  |    private DataSource initializeDataSource(String dataSourceJNDI) throws NamingException{
  | 	logger.debug("entering initializeDataSource()");
  |         DataSource dataSource = null;
  |        try{
  |           InitialContext ic = new InitialContext();
  |           dataSource = (DataSource) ic.lookup(dataSourceJNDI);
  |        }catch (NamingException ne){
  |            throw new NamingException("NamingException while looking" +
  |                    " up DataSource Connection "
  |                    + ": \n" + ne.getMessage());
  |        }
  | 	logger.debug("leaving initializeDataSource()");
  |         return dataSource;
  |    }     
  |       
  |    synchronized public Connection getConnection(String ds)throws NamingException, SQLException
  |    {
  |    	   logger.debug("entering getConnection()");   	   
  |    	   logger.info("get connection for "+ds);
  |    	   
  |        DataSource dataSource = initializeDataSource(ds);
  |              
  |        Connection conn = null;
  |        
  |        try {
  |        		conn = dataSource.getConnection();				
  |        		logger.info("connection:"+conn.toString());
  |        } catch (NullPointerException e) {
  | 	       	logger.error("caught np exception getting connection from cached resource!");
  | 	       	logger.info("attempting to restart the datasource...");
  |                 /*
  |                  * If the dataSource has been shutdown or perhaps
  |                  * the database server has been restarted, then, these
  |                  * exception handlers will restart the datasource...
  |                  * NOTE: All works fine if a user is in the middle of using the app,
  |                  * however, since the Security relies on JBoss CMP then
  |                  * are unable to authenticate
  |                  */	       	
  | 	       	conn = resetDataSource(ds);       	
  | 	       	logger.info("connection established!");
  |        } catch (SQLException e) {
  | 	       	logger.error("caught sql exception getting connection from cached resource!");
  |                 logger.info("sql ex->"+e.getMessage());
  | 	       	logger.info("attempting to restart the datasource...");
  | 	       	/*
  |                  * If the dataSource has been shutdown or perhaps
  |                  * the database server has been restarted, then, these
  |                  * exception handlers will restart the datasource...
  |                  * NOTE: All works fine if a user is in the middle of using the app,
  |                  * however, since the Security relies on JBoss CMP then
  |                  * are unable to authenticate
  |                  */
  | 	       	conn = resetDataSource(ds);       	
  | 	       	logger.info("connection established!");       	
  |        }
  |        
  | 	//conn.setAutoCommit(true);
  | 	logger.debug("leaving getConnection()");
  |        return conn;
  |    }                 
  | 
  |    private Connection resetDataSource(String dataSourceJNDI)throws NamingException, SQLException{
  |    		// 	try and restart it
  |    		DataSource ds = initializeDataSource(dataSourceJNDI);
  |    		return ds.getConnection();
  |    } 
  | 
The data source's are:

  | <datasources>   
  |   <local-tx-datasource> 
  |       <jndi-name>DefaultDS</jndi-name>                
  | 
  | <connection-url>jdbc:microsoft:sqlserver://####:1433;DatabaseName=Main;SelectMethod=cursor</connection-url>     
  |  <driver-class>com.microsoft.jdbc.sqlserver.SQLServerDriver</driver-class>
  | 	    <user-name>reg</user-name>
  | 	    <password>****</password>    
  | 	    <check-valid-connection-sql>SELECT * FROM Site(NOLOCK) WHERE SiteID = 179</check-valid-connection-sql>
  |       <!-- pooling parameters -->  
  |       <min-pool-size>5</min-pool-size>  
  |       <max-pool-size>10</max-pool-size>      
  |     <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
  |     <metadata>
  |       <type-mapping>MS SQLSERVER2000</type-mapping>
  |     </metadata>
  |       <idle-timeout-minutes>0</idle-timeout-minutes>  
  |     </local-tx-datasource>  
  | </datasources>
  | 
And the other:

  | <datasources>     
  |   <local-tx-datasource>
  |     <jndi-name>CATS_DS_MAIN</jndi-name>        
  | 
  | <connection-url>jdbc:microsoft:sqlserver://####:1433;DatabaseName=Main;SelectMethod=cursor</connection-url>     
  |  <driver-class>com.microsoft.jdbc.sqlserver.SQLServerDriver</driver-class>
  |     <!-- Use the security domain defined in conf/login-config.xml -->
  |     <security-domain>PortalCatsEncryptDBPassword</security-domain>
  |     <!-- ensures a valid connection -->
  |       <check-valid-connection-sql>SELECT * FROM Site(NOLOCK) WHERE SiteID = 179</check-valid-connection-sql>
  |     <!--pooling parameters-->
  |     <min-pool-size>5</min-pool-size>
  |     <max-pool-size>10</max-pool-size>
  |     <idle-timeout-minutes>0</idle-timeout-minutes>     
  |     <!-- corresponding type-mapping in the standardjbosscmp-jdbc.xml (optional) -->
  |     <metadata>
  |       <type-mapping>MS SQLSERVER2000</type-mapping>
  |     </metadata>    
  |   </local-tx-datasource>
  | </data-sources>
  | 
and the login-config entry:

  | <application-policy name = "PortalCatsEncryptDBPassword">
  |        <authentication>
  |           <login-module code = "org.jboss.resource.security.SecureIdentityLoginModule"
  |              flag = "required">
  |                <module-option name = "username">portal</module-option>
  |                <module-option name = "password">-1c4fcf3f77be50b7</module-option>
  |                <module-option name = "managedConnectionFactoryName">jboss.jca:service=LocalTxCM,name=CATS_DS_MAIN</module-option>
  |          </login-module>      
  |       </authentication>
  |     </application-policy>
  | 

The trace is done using the SQL Profiler.  The expected login was reg, however, the trace shows the Insert and Updates performed by portal.

Thanks again.

Graham

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