| /* |
| * 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.hbase; |
| |
| import java.io.IOException; |
| import java.util.concurrent.CompletableFuture; |
| import java.util.function.Supplier; |
| import org.apache.hadoop.hbase.client.AsyncConnection; |
| import org.junit.ClassRule; |
| import org.junit.Rule; |
| import org.junit.rules.ExternalResource; |
| |
| /** |
| * A {@link Rule} that manages the lifecycle of an instance of {@link AsyncConnection}. Can be used |
| * in either the {@link Rule} or {@link ClassRule} positions. |
| * </p> |
| * Use in combination with {@link MiniClusterRule}, for example: |
| * |
| * <pre>{@code |
| * public class TestMyClass { |
| * private static final MiniClusterRule miniClusterRule = MiniClusterRule.newBuilder().build(); |
| * private static final ConnectionRule connectionRule = |
| * new ConnectionRule(miniClusterRule::createConnection); |
| * |
| * @ClassRule |
| * public static final TestRule rule = RuleChain |
| * .outerRule(miniClusterRule) |
| * .around(connectionRule); |
| * } |
| * }</pre> |
| */ |
| public class ConnectionRule extends ExternalResource { |
| |
| private final Supplier<CompletableFuture<AsyncConnection>> connectionSupplier; |
| private AsyncConnection connection; |
| |
| public ConnectionRule(final Supplier<CompletableFuture<AsyncConnection>> connectionSupplier) { |
| this.connectionSupplier = connectionSupplier; |
| } |
| |
| public AsyncConnection getConnection() { |
| return connection; |
| } |
| |
| @Override |
| protected void before() throws Throwable { |
| this.connection = connectionSupplier.get().join(); |
| } |
| |
| @Override |
| protected void after() { |
| if (this.connection != null) { |
| try { |
| connection.close(); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| } |
| } |