| /* |
| * 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.htrace.util; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.UUID; |
| |
| /** |
| * Small util for making a data directory for tests to use when running tests. We put it up at |
| * target/test-data/UUID. Create an instance of this class per unit test run and it will take |
| * care of setting up the dirs for you. Pass what is returned here as location from which to |
| * have daemons and tests dump data. |
| * TODO: Add close on exit. |
| */ |
| public class DataDir { |
| private File baseTestDir = null; |
| private File testDir = null; |
| |
| /** |
| * System property key to get base test directory value |
| */ |
| public static final String TEST_BASE_DIRECTORY_KEY = "test.data.base.dir"; |
| |
| /** |
| * Default base directory for test output. |
| */ |
| public static final String TEST_BASE_DIRECTORY_DEFAULT = "target"; |
| |
| public static final String TEST_BASE_DIRECTORY_NAME = "test-data"; |
| |
| /** |
| * @return Where to write test data on local filesystem; usually |
| * {@link #TEST_BASE_DIRECTORY_DEFAULT} |
| * Should not be used directly by the unit tests, hence its's private. |
| * Unit test will use a subdirectory of this directory. |
| * @see #setupDataTestDir() |
| */ |
| private synchronized File getBaseTestDir() { |
| if (this.baseTestDir != null) return this.baseTestDir; |
| String testHome = System.getProperty(TEST_BASE_DIRECTORY_KEY, TEST_BASE_DIRECTORY_DEFAULT); |
| this.baseTestDir = new File(testHome, TEST_BASE_DIRECTORY_NAME); |
| return this.baseTestDir; |
| } |
| |
| /** |
| * @return Absolute path to the dir created by this instance. |
| * @throws IOException |
| */ |
| public synchronized File getDataDir() throws IOException { |
| if (this.testDir != null) return this.testDir; |
| this.testDir = new File(getBaseTestDir(), UUID.randomUUID().toString()); |
| if (!this.testDir.exists()) { |
| if (!this.testDir.mkdirs()) throw new IOException("Failed mkdirs for " + this.testDir); |
| } |
| // Return absolute path. A relative passed to htraced will have it create data dirs relative |
| // to its data dir rather than in it. |
| return this.testDir.getAbsoluteFile(); |
| } |
| |
| /** |
| * Fragile. Ugly. Presumes paths. Best we can do for now until htraced comes local to this module |
| * and is moved out of src dir. |
| * @param dataDir A datadir gotten from {@link #getDataDir()} |
| * @return Top-level of the checkout. |
| */ |
| public static File getTopLevelOfCheckout(final File dataDir) { |
| // Need absolute else we run out of road when dir is relative to this module. |
| File absolute = dataDir.getAbsoluteFile(); |
| // Check we are where we think we are. |
| File testDataDir = absolute.getParentFile(); |
| if (!testDataDir.getName().equals(TEST_BASE_DIRECTORY_NAME)) { |
| throw new IllegalArgumentException(dataDir.toString()); |
| } |
| // Do another check. |
| File targetDir = testDataDir.getParentFile(); |
| if (!targetDir.getName().equals(TEST_BASE_DIRECTORY_DEFAULT)) { |
| throw new IllegalArgumentException(dataDir.toString()); |
| } |
| // Back up last two dirs out of the htrace-htraced dir. |
| return targetDir.getParentFile().getParentFile(); |
| } |
| } |