/**
* 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 backtype.storm.scheduler;
import java.util.Map;
public interface IScheduler {
void prepare(Map conf);
/**
* Set assignments for the topologies which needs scheduling. The new assignments is available through <code>cluster.getAssignments()</code>
*
* @param topologies all the topologies in the cluster, some of them need schedule. Topologies object here only contain static information about topologies.
* Information like assignments, slots are all in the <code>cluster</code>object.
* @param cluster the cluster these topologies are running in. <code>cluster</code> contains everything user need to develop a new scheduling logic. e.g.
* supervisors information, available slots, current assignments for all the topologies etc. User can set the new assignment for topologies using
* <code>cluster.setAssignmentById</code>
*/
void schedule(Topologies topologies, Cluster cluster);
}