| /** |
| * 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.fs; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import java.util.concurrent.Semaphore; |
| |
| import junit.framework.TestCase; |
| |
| public class TestFileSystemCaching extends TestCase { |
| |
| public static class InitializeForeverFileSystem extends LocalFileSystem { |
| final static Semaphore sem = new Semaphore(0); |
| public void initialize(URI uri, Configuration conf) throws IOException { |
| // notify that InitializeForeverFileSystem started initialization |
| sem.release(); |
| try { |
| while (true) { |
| Thread.sleep(1000); |
| } |
| } catch (InterruptedException e) { |
| return; |
| } |
| } |
| } |
| |
| public void testCacheEnabledWithInitializeForeverFS() throws Exception { |
| final Configuration conf = new Configuration(); |
| Thread t = new Thread() { |
| public void run() { |
| conf.set("fs.localfs1.impl", "org.apache.hadoop.fs." + |
| "TestFileSystemCaching$InitializeForeverFileSystem"); |
| try { |
| FileSystem.get(new URI("localfs1://a"), conf); |
| } catch (IOException e) { |
| e.printStackTrace(); |
| } catch (URISyntaxException e) { |
| e.printStackTrace(); |
| } |
| } |
| }; |
| t.start(); |
| // wait for InitializeForeverFileSystem to start initialization |
| InitializeForeverFileSystem.sem.acquire(); |
| |
| conf.set("fs.cachedfile.impl", conf.get("fs.file.impl")); |
| FileSystem.get(new URI("cachedfile://a"), conf); |
| t.interrupt(); |
| t.join(); |
| } |
| } |