| /** |
| * 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.hadoop.yarn.server.federation.store; |
| |
| import org.apache.hadoop.classification.InterfaceAudience.Private; |
| import org.apache.hadoop.classification.InterfaceStability.Unstable; |
| import org.apache.hadoop.yarn.exceptions.YarnException; |
| import org.apache.hadoop.yarn.server.federation.store.records.GetSubClusterPoliciesConfigurationsRequest; |
| import org.apache.hadoop.yarn.server.federation.store.records.GetSubClusterPoliciesConfigurationsResponse; |
| import org.apache.hadoop.yarn.server.federation.store.records.GetSubClusterPolicyConfigurationRequest; |
| import org.apache.hadoop.yarn.server.federation.store.records.GetSubClusterPolicyConfigurationResponse; |
| import org.apache.hadoop.yarn.server.federation.store.records.SetSubClusterPolicyConfigurationRequest; |
| import org.apache.hadoop.yarn.server.federation.store.records.SetSubClusterPolicyConfigurationResponse; |
| |
| /** |
| * The FederationPolicyStore provides a key-value interface to access the |
| * policies configured for the system. The key is a "queue" name, i.e., the |
| * system allows to configure a different policy for each queue in the system |
| * (though each policy can make dynamic run-time decisions on a per-job/per-task |
| * basis). The value is a {@code SubClusterPolicyConfiguration}, a serialized |
| * representation of the policy type and its parameters. |
| */ |
| @Private |
| @Unstable |
| public interface FederationPolicyStore { |
| |
| /** |
| * Get the policy configuration for a given queue. |
| * |
| * @param request the queue whose {@code SubClusterPolicyConfiguration} is |
| * required |
| * @return the {@code SubClusterPolicyConfiguration} for the specified queue, |
| * or {@code null} if there is no mapping for the queue |
| * @throws YarnException if the request is invalid/fails |
| */ |
| GetSubClusterPolicyConfigurationResponse getPolicyConfiguration( |
| GetSubClusterPolicyConfigurationRequest request) throws YarnException; |
| |
| /** |
| * Set the policy configuration for a given queue. |
| * |
| * @param request the {@code SubClusterPolicyConfiguration} with the |
| * corresponding queue |
| * @return response empty on successfully updating the |
| * {@code SubClusterPolicyConfiguration} for the specified queue |
| * @throws YarnException if the request is invalid/fails |
| */ |
| SetSubClusterPolicyConfigurationResponse setPolicyConfiguration( |
| SetSubClusterPolicyConfigurationRequest request) throws YarnException; |
| |
| /** |
| * Get a map of all queue-to-policy configurations. |
| * |
| * @param request empty to represent all configured queues in the system |
| * @return the policies for all currently active queues in the system |
| * @throws YarnException if the request is invalid/fails |
| */ |
| GetSubClusterPoliciesConfigurationsResponse getPoliciesConfigurations( |
| GetSubClusterPoliciesConfigurationsRequest request) throws YarnException; |
| |
| } |