Package it.eng.spagobi.engines.qbe.services.core.catalogue

Source Code of it.eng.spagobi.engines.qbe.services.core.catalogue.DeleteQueriesAction

/**
* SpagoBI - The Business Intelligence Free Platform
*
* Copyright (C) 2004 - 2008 Engineering Ingegneria Informatica S.p.A.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.

* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*
**/
package it.eng.spagobi.engines.qbe.services.core.catalogue;

import it.eng.qbe.query.Query;
import it.eng.spago.base.SourceBean;
import it.eng.spagobi.engines.qbe.services.core.AbstractQbeEngineAction;
import it.eng.spagobi.utilities.assertion.Assert;
import it.eng.spagobi.utilities.engines.SpagoBIEngineServiceException;
import it.eng.spagobi.utilities.engines.SpagoBIEngineServiceExceptionHandler;
import it.eng.spagobi.utilities.service.JSONAcknowledge;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import org.apache.log4j.Logger;
import org.json.JSONArray;


/**
* Remove from the catalogue queries whose ids has been passed as argument to the service.
*
* @author Andrea Gioia (andrea.gioia@eng.it)
*/
public class DeleteQueriesAction extends AbstractQbeEngineAction
 
  public static final String SERVICE_NAME = "DELETE_QUERIES_ACTION";
  public String getActionName(){return SERVICE_NAME;}
 
 
  // INPUT PARAMETERS
  public static final String QUERY_IDS = "queries";
 
  /** Logger component. */
    public static transient Logger logger = Logger.getLogger(DeleteQueriesAction.class);
  
   
 
  public void service(SourceBean request, SourceBean response)  {       
       
    JSONArray ids;
    Iterator it;
     
    logger.debug("IN");
   
    try {
   
      super.service(request, response);   
     
      ids = getAttributeAsJSONArray( QUERY_IDS );
      logger.debug("Parameter [" + QUERY_IDS + "] is equals to [" + ids + "]");
     
      Assert.assertNotNull(getEngineInstance(), "It's not possible to execute " + this.getActionName() + " service before having properly created an instance of EngineInstance class");
     
     
      if(ids != null && ids.length() > 0) {
        List list = new ArrayList();
        for(int i = 0; i < ids.length(); i++) {
          list.add(ids.getString(i));
        }
        it = list.iterator();
      } else {
        it = getEngineInstance().getQueryCatalogue().getIds().iterator();
      }
     
      while(it.hasNext()) {
        String id = (String)it.next();
        // leave query definition inside the while in order to release to gc the removed query asap     
        Query query = getEngineInstance().getQueryCatalogue().removeQuery(id);
        Assert.assertNotNull(query, "A query with id equals to [" + id + "] does not exist in teh catalogue");
        logger.debug("Qury with id equals to [" + QUERY_IDS + "] has been removed succesfully from the catalogue]");
      }
     
      try {
        writeBackToClient( new JSONAcknowledge() );
      } catch (IOException e) {
        String message = "Impossible to write back the responce to the client";
        throw new SpagoBIEngineServiceException(getActionName(), message, e);
      }
     
    } catch(Throwable t) {
      throw SpagoBIEngineServiceExceptionHandler.getInstance().getWrappedException(getActionName(), getEngineInstance(), t);
    } finally {
      logger.debug("OUT");
   
   
  }

}
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