| /* |
| * 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.accumulo.test.zookeeper; |
| |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.security.SecureRandom; |
| import java.util.Random; |
| import java.util.concurrent.CountDownLatch; |
| |
| import org.apache.curator.test.TestingServer; |
| import org.apache.zookeeper.CreateMode; |
| import org.apache.zookeeper.Watcher; |
| import org.apache.zookeeper.ZooDefs; |
| import org.apache.zookeeper.ZooKeeper; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Uses Apache Curator to create a running zookeeper server for internal tests. The zookeeper port |
| * is randomly assigned in case multiple instances are created by concurrent tests. |
| */ |
| public class ZooKeeperTestingServer implements AutoCloseable { |
| |
| private static final Logger log = LoggerFactory.getLogger(ZooKeeperTestingServer.class); |
| |
| private TestingServer zkServer; |
| private final ZooKeeper zoo; |
| |
| private static final Random rand = new SecureRandom(); |
| |
| /** |
| * Instantiate a running zookeeper server - this call will block until the server is ready for |
| * client connections. It will try three times, with a 5 second pause to connect. |
| */ |
| public ZooKeeperTestingServer() { |
| this(getPort()); |
| } |
| |
| private ZooKeeperTestingServer(int port) { |
| |
| try { |
| |
| Path tmpDir = Files.createTempDirectory("zk_test"); |
| |
| CountDownLatch connectionLatch = new CountDownLatch(1); |
| |
| // using a random port. The test server allows for auto port |
| // generation, but not with specifying the tmp dir path too. |
| // so, generate our own. |
| boolean started = false; |
| int retry = 0; |
| while (!started && retry++ < 3) { |
| |
| try { |
| |
| zkServer = new TestingServer(port, tmpDir.toFile()); |
| zkServer.start(); |
| |
| started = true; |
| } catch (Exception ex) { |
| log.trace("zookeeper test server start failed attempt {}", retry); |
| } |
| } |
| |
| log.info("zookeeper connection string:'{}'", zkServer.getConnectString()); |
| |
| zoo = new ZooKeeper(zkServer.getConnectString(), 5_000, watchedEvent -> { |
| if (watchedEvent.getState() == Watcher.Event.KeeperState.SyncConnected) { |
| connectionLatch.countDown(); |
| } |
| }); |
| |
| connectionLatch.await(); |
| |
| } catch (Exception ex) { |
| throw new IllegalStateException("Failed to start testing zookeeper", ex); |
| } |
| |
| } |
| |
| /** |
| * Returns an random integer between 50_000 and 65_000 (typical ephemeral port range for linux is |
| * listed as 49,152 to 65,535 |
| * |
| * @return a random port with the linux ephemeral port range. |
| */ |
| private static int getPort() { |
| final int minPort = 50_000; |
| final int maxPort = 65_000; |
| return rand.nextInt((maxPort - minPort) + 1) + minPort; |
| } |
| |
| public ZooKeeper getZooKeeper() { |
| return zoo; |
| } |
| |
| public String getConn() { |
| return zkServer.getConnectString(); |
| } |
| |
| public void initPaths(String s) { |
| try { |
| |
| String[] paths = s.split("/"); |
| |
| String slash = "/"; |
| String path = ""; |
| |
| for (String p : paths) { |
| if (!p.isEmpty()) { |
| path = path + slash + p; |
| log.debug("building default paths, creating node {}", path); |
| zoo.create(path, null, ZooDefs.Ids.OPEN_ACL_UNSAFE, CreateMode.PERSISTENT); |
| } |
| } |
| |
| } catch (Exception ex) { |
| throw new IllegalStateException("Failed to create accumulo initial paths: " + s, ex); |
| } |
| } |
| |
| @Override |
| public void close() throws IOException { |
| if (zkServer != null) { |
| zkServer.stop(); |
| } |
| } |
| |
| } |