NotifierPreInResponseHandler.java

/*
 * GovWay - A customizable API Gateway 
 * https://govway.org
 * 
 * Copyright (c) 2005-2025 Link.it srl (https://link.it).
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3, as published by
 * the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
package org.openspcoop2.pdd.core.handlers.notifier;

import java.util.List;

import org.openspcoop2.pdd.config.ClassNameProperties;
import org.openspcoop2.pdd.config.OpenSPCoop2Properties;
import org.openspcoop2.pdd.core.handlers.HandlerException;
import org.openspcoop2.pdd.core.handlers.PreInResponseContext;
import org.openspcoop2.pdd.core.handlers.PreInResponseHandler;
import org.openspcoop2.utils.resources.Loader;
import org.openspcoop2.utils.io.notifier.NotifierInputStreamParams;
import org.openspcoop2.utils.io.notifier.StreamingHandler;

/**
 * NotifierPreInResponseHandler
 * 
 * @author Poli Andrea (apoli@link.it)
 * @author $Author$
 * @version $Rev$, $Date$
 */
public class NotifierPreInResponseHandler implements PreInResponseHandler {

    @Override
    public void invoke(PreInResponseContext context) throws HandlerException {
        
        try{
        
            OpenSPCoop2Properties properties = OpenSPCoop2Properties.getInstance();
            ClassNameProperties classNameProperties = ClassNameProperties.getInstance();
            if(properties.isNotifierInputStreamEnabled()) {
                String notifierInputStreamCallback = properties.getNotifierInputStreamCallback();
                INotifierCallback notifierCallback = (INotifierCallback) Loader.getInstance().newInstance(classNameProperties.getNotifierCallback(notifierInputStreamCallback));
                if(notifierCallback.enableNotifierInputStream(NotifierType.PRE_IN_RESPONSE, context)){
                    
                    NotifierInputStreamParams notifierInputStreamParams = new NotifierInputStreamParams();
                    
                    // Notify
                    NotifierResult notifierResult = notifierCallback.notify(NotifierType.PRE_IN_RESPONSE, context);
                    
                    notifierInputStreamParams.setBufferEnabled(NotifierBufferState.ENABLE.equals(notifierResult.getBufferState()));
                    
                    List<StreamingHandler> streamingHandlers = notifierResult.getStreamingHandlers();
                    if(streamingHandlers!=null && streamingHandlers.size()>0){
                        for (StreamingHandler streamingHandler : streamingHandlers) {
                            notifierInputStreamParams.addStreamingHandler(streamingHandler);
                        }
                    }
                    
                    notifierInputStreamParams.setThrowStreamingHandlerException(notifierCallback.throwStreamingHandlerException(NotifierType.PRE_IN_RESPONSE, context));
                
                    notifierInputStreamParams.setLog(context.getLogCore());
                    
                    context.setNotifierInputStreamParams(notifierInputStreamParams);
                }
            }
            
        }catch(Exception e){
            throw new HandlerException(e.getMessage(),e);
        }
    }

}