/***********************************************************************************************************************
* Copyright (C) 2010-2013 by the Stratosphere project (http://stratosphere.eu)
*
* 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 eu.stratosphere.runtime.io.gates;
import eu.stratosphere.core.io.IOReadableWritable;
import eu.stratosphere.runtime.io.gates.InputGate;
/**
* This interface can be implemented by a class which shall be notified by an input gate when one of the its connected
* input channels has at least one record available for reading.
*
* @param <T>
* the type of record transported through the corresponding input gate
*/
public interface RecordAvailabilityListener<T extends IOReadableWritable> {
/**
* This method is called by an input gate when one of its connected input channels has at least one record available
* for reading.
*
* @param inputGate
* the input gate which has at least one record available
*/
void reportRecordAvailability(InputGate<T> inputGate);
}