| /* |
| * 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.server.options; |
| |
| import java.util.Map; |
| |
| /** |
| * This is an {@link OptionManager} that holds options in memory rather than in |
| * a persistent store. Options stored in {@link SessionOptionManager}, |
| * {@link QueryOptionManager}, and {@link FragmentOptionManager} are held in |
| * memory (see {@link #options}) whereas the {@link SystemOptionManager} stores |
| * options in a persistent store. |
| */ |
| public abstract class InMemoryOptionManager extends FallbackOptionManager { |
| |
| protected final Map<String, OptionValue> options; |
| |
| InMemoryOptionManager(final OptionManager fallback, final Map<String, OptionValue> options) { |
| super(fallback); |
| this.options = options; |
| } |
| |
| @Override |
| OptionValue getLocalOption(final String name) { |
| return options.get(name); |
| } |
| |
| @Override |
| public void setLocalOptionHelper(final OptionValue value) { |
| options.put(value.name, value); |
| } |
| |
| @Override |
| Iterable<OptionValue> getLocalOptions() { |
| return options.values(); |
| } |
| |
| @Override |
| public void deleteAllLocalOptions() { |
| options.clear(); |
| } |
| |
| @Override |
| public void deleteLocalOption(final String name) { |
| options.remove(name); |
| } |
| } |