/*
 * Copyright (c) 2015, WSO2 Inc. (http://www.wso2.org) All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.wso2.carbon.event.processor.core.internal.listener;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.wso2.carbon.databridge.commons.utils.DataBridgeCommonsUtils;
import org.wso2.carbon.event.processor.core.ExecutionPlanConfigurationFile;
import org.wso2.carbon.event.processor.core.exception.ExecutionPlanConfigurationException;
import org.wso2.carbon.event.processor.core.internal.CarbonEventProcessorService;
import org.wso2.carbon.event.processor.core.internal.ds.EventProcessorValueHolder;
import org.wso2.carbon.event.stream.core.EventStreamListener;

public class EventStreamListenerImpl implements EventStreamListener {

    private static final Log log = LogFactory.getLog(EventStreamListenerImpl.class);

    @Override
    public void removedEventStream(int tenantId, String streamName, String streamVersion) {

        CarbonEventProcessorService carbonEventProcessorService = EventProcessorValueHolder.getEventProcessorService();
        String streamNameWithVersion = DataBridgeCommonsUtils.generateStreamId(streamName, streamVersion);
        carbonEventProcessorService.deactivateActiveExecutionPlanConfigurations(streamNameWithVersion);
    }

    /**
     * @param tenantId
     * @param streamName
     * @param streamVersion
     */
    public void addedEventStream(int tenantId, String streamName, String streamVersion) {

        CarbonEventProcessorService carbonEventProcessorService = EventProcessorValueHolder.getEventProcessorService();
        String streamNameWithVersion = DataBridgeCommonsUtils.generateStreamId(streamName, streamVersion);
        try {
            carbonEventProcessorService.activateInactiveExecutionPlanConfigurations(ExecutionPlanConfigurationFile.Status.WAITING_FOR_DEPENDENCY, streamNameWithVersion);
        } catch (ExecutionPlanConfigurationException e) {
            log.error("Exception occurred while re-deploying the Event processor configuration files");
        }
    }
}
