/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 * 
 * Copyright 1997-2007 Sun Microsystems, Inc. All rights reserved.
 * 
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License. You can obtain
 * a copy of the License at https://glassfish.dev.java.net/public/CDDL+GPL.html
 * or glassfish/bootstrap/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 * 
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at glassfish/bootstrap/legal/LICENSE.txt.
 * Sun designates this particular file as subject to the "Classpath" exception
 * as provided by Sun in the GPL Version 2 section of the License file that
 * accompanied this code.  If applicable, add the following below the License
 * Header, with the fields enclosed by brackets [] replaced by your own
 * identifying information: "Portions Copyrighted [year]
 * [name of copyright owner]"
 * 
 * Contributor(s):
 * 
 * If you wish your version of this file to be governed by only the CDDL or
 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
 * only if the new code is made subject to such option by the copyright
 * holder.
 */

package javax.resource.spi;

import javax.resource.ResourceException;

/** The ManagedConnectionMetaData interface provides information about the 
 *  underlying EIS instance associated with a ManagedConnection instance.
 *  An application server uses this information to get runtime information
 *  about a connected EIS instance.
 *
 *  <p>The method ManagedConnection.getMetaData returns a 
 *  ManagedConnectionMetaData instance.
 *  
 *  @version     0.8
 *  @author      Rahul Sharma
 *  @see         javax.resource.spi.ManagedConnection
**/

public interface ManagedConnectionMetaData {

  /** Returns Product name of the underlying EIS instance connected 
   *  through the ManagedConnection.
   *
   *  @return  Product name of the EIS instance.
  **/
  public
  String getEISProductName() throws ResourceException;

  /** Returns product version of the underlying EIS instance connected 
   *  through the ManagedConnection.
   *
   *  @return  Product version of the EIS instance
  **/
  public
  String getEISProductVersion() throws ResourceException;

  /** Returns maximum limit on number of active concurrent connections 
   *  that an EIS instance can support across client processes. If an EIS 
   *  instance does not know about (or does not have) any such limit, it 
   *  returns a 0.
   *
   *  @return  Maximum limit for number of active concurrent connections
  **/
  public
  int getMaxConnections() throws ResourceException;
  
  /** Returns name of the user associated with the ManagedConnection
   *  instance. The name corresponds to the resource principal under whose
   *  whose security context, a connection to the EIS instance has been
   *  established.
   *
   *  @return  name of the user
  **/
  public
  String getUserName() throws ResourceException;
}