| /** |
| * 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.storm.assignments; |
| |
| import java.util.Map; |
| import org.apache.storm.Config; |
| import org.apache.storm.shade.com.google.common.base.Preconditions; |
| import org.apache.storm.utils.ConfigUtils; |
| import org.apache.storm.utils.ReflectionUtils; |
| |
| /** |
| * Factory class for creating local assignments. |
| */ |
| public class LocalAssignmentsBackendFactory { |
| |
| public static ILocalAssignmentsBackend getBackend(Map<String, Object> conf) { |
| if (conf.get(Config.NIMBUS_LOCAL_ASSIGNMENTS_BACKEND_CLASS) != null) { |
| Object targetObj = ReflectionUtils.newInstance((String) conf.get(Config.NIMBUS_LOCAL_ASSIGNMENTS_BACKEND_CLASS)); |
| Preconditions.checkState(targetObj instanceof ILocalAssignmentsBackend, "{} must implements ILocalAssignmentsBackend", |
| Config.NIMBUS_LOCAL_ASSIGNMENTS_BACKEND_CLASS); |
| ((ILocalAssignmentsBackend) targetObj).prepare(conf); |
| return (ILocalAssignmentsBackend) targetObj; |
| } |
| |
| return getDefault(); |
| } |
| |
| public static ILocalAssignmentsBackend getDefault() { |
| ILocalAssignmentsBackend backend = new InMemoryAssignmentBackend(); |
| backend.prepare(ConfigUtils.readStormConfig()); |
| return backend; |
| } |
| } |