StandaloneSession.java

/*
 * This program is free software; you can redistribute it and/or modify it under the 
 * terms of the GNU General Public License, version 2 as published by the Free Software 
 * Foundation.
 *
 * You should have received a copy of the GNU General Public License along with this 
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/gpl-2.0.html 
 * or from the Free Software Foundation, Inc., 
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; 
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU General Public License for more details.
 *
 *
 * Copyright 2005 - 2008 Pentaho Corporation.  All rights reserved. 
 * 
 * @created Jun 23, 2005 
 * @author James Dixon
 * 
 */

package org.pentaho.platform.engine.core.system;

import java.util.HashMap;
import java.util.Iterator;
import java.util.Locale;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.pentaho.platform.api.engine.ISessionContainer;
import org.pentaho.platform.engine.core.messages.Messages;

public class StandaloneSession extends BaseSession {

  /**
   * 
   */
  private static final long serialVersionUID = -1614831602086304014L;

  private static final Log logger = LogFactory.getLog(StandaloneSession.class);

  @Override
  public Log getLogger() {
    return StandaloneSession.logger;
  }

  private HashMap attributes;

  public StandaloneSession() {
    this("unknown"); //$NON-NLS-1$
  }

  public StandaloneSession(final String name) {
    this(name, name);
  }

  public StandaloneSession(final String name, final String id) {
    this(name, id, Locale.getDefault());
  }

  public StandaloneSession(final String name, final String id, final Locale locale) {
    super(name, id, locale);
    attributes = new HashMap();
  }

  public Iterator getAttributeNames() {
    if (attributes == null) {
      throw new IllegalStateException(Messages.getInstance().getErrorString("StandaloneSession.ERROR_0001_ACCESSING_DESTROYED_SESSION", String.valueOf(Thread.currentThread().getId())));//$NON-NLS-1$
    }

    // TODO need to turn the set iterator into an enumeration...
    return attributes.keySet().iterator();
  }

  public Object getAttribute(final String attributeName) {
    if (attributes == null) {
      throw new IllegalStateException(Messages.getInstance().getErrorString("StandaloneSession.ERROR_0001_ACCESSING_DESTROYED_SESSION", String.valueOf(Thread.currentThread().getId())));//$NON-NLS-1$
    }
    return attributes.get(attributeName);
  }

  public void setAttribute(final String attributeName, final Object value) {
    if (attributes == null) {
      throw new IllegalStateException(Messages.getInstance().getErrorString("StandaloneSession.ERROR_0001_ACCESSING_DESTROYED_SESSION", String.valueOf(Thread.currentThread().getId())));//$NON-NLS-1$
    }

    attributes.put(attributeName, value);
  }

  public Object removeAttribute(final String attributeName) {
    if (attributes == null) {
      throw new IllegalStateException(Messages.getInstance().getErrorString("StandaloneSession.ERROR_0001_ACCESSING_DESTROYED_SESSION", String.valueOf(Thread.currentThread().getId())));//$NON-NLS-1$
    }

    Object result = getAttribute(attributeName);
    attributes.remove(attributeName);
    return result;
  }

  public void destroy() {
    // Clear out references to this session in attributes.
    // See BISERVER-2639 for details
    if (attributes != null) {
      for (Object o : attributes.values()) {
        if (o instanceof ISessionContainer) {
          ISessionContainer c = ((ISessionContainer) o);
          // XXX: should synchronized check if the session is actually /this/ session
          c.setSession(null);
        }
      }
      attributes = null;
    }
    super.destroy();
  }

}