| /** |
| * 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); |
| } |