/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.drill.exec.work.foreman;
import org.apache.drill.exec.proto.CoordinationProtos;
import java.util.Set;
/**
* Interface to define the listener to take actions when the set of active drillbits is changed.
*/
public interface DrillbitStatusListener {
/**
* The action to taken when a set of drillbits are unregistered from the cluster.
* @param unregisteredDrillbits the set of newly unregistered drillbits.
*/
void drillbitUnregistered(Set<CoordinationProtos.DrillbitEndpoint> unregisteredDrillbits);
/**
* The action to taken when a set of new drillbits are registered to the cluster.
* @param registeredDrillbits the set of newly registered drillbits. Note: the complete set of currently registered bits could be different.
*/
void drillbitRegistered(Set<CoordinationProtos.DrillbitEndpoint> registeredDrillbits);
}