| /* |
| * 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.contract; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.conf.Configured; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.junit.Assert; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.net.URL; |
| |
| /** |
| * Class representing a filesystem contract that a filesystem |
| * implementation is expected implement. |
| * |
| * Part of this contract class is to allow FS implementations to |
| * provide specific opt outs and limits, so that tests can be |
| * skip unsupported features (e.g. case sensitivity tests), |
| * dangerous operations (e.g. trying to delete the root directory), |
| * and limit filesize and other numeric variables for scale tests |
| */ |
| public abstract class AbstractFSContract extends Configured { |
| private static final Logger LOG = |
| LoggerFactory.getLogger(AbstractFSContract.class); |
| |
| private boolean enabled = true; |
| |
| |
| /** |
| * Constructor: loads the authentication keys if found |
| * @param conf configuration to work with |
| */ |
| protected AbstractFSContract(Configuration conf) { |
| super(conf); |
| if (maybeAddConfResource(ContractOptions.CONTRACT_OPTIONS_RESOURCE)) { |
| LOG.debug("Loaded authentication keys from {}", ContractOptions.CONTRACT_OPTIONS_RESOURCE); |
| } else { |
| LOG.debug("Not loaded: {}", ContractOptions.CONTRACT_OPTIONS_RESOURCE); |
| } |
| } |
| |
| /** |
| * Any initialisation logic can go here |
| * @throws IOException IO problems |
| */ |
| public void init() throws IOException { |
| |
| } |
| |
| /** |
| * Add a configuration resource to this instance's configuration |
| * @param resource resource reference |
| * @throws AssertionError if the resource was not found. |
| */ |
| protected void addConfResource(String resource) { |
| boolean found = maybeAddConfResource(resource); |
| Assert.assertTrue("Resource not found " + resource, found); |
| } |
| |
| /** |
| * Add a configuration resource to this instance's configuration, |
| * return true if the resource was found |
| * @param resource resource reference |
| */ |
| protected boolean maybeAddConfResource(String resource) { |
| URL url = this.getClass().getClassLoader().getResource(resource); |
| boolean found = url != null; |
| if (found) { |
| getConf().addResource(resource); |
| } |
| return found; |
| } |
| |
| |
| /** |
| * Get the FS from a URI. The default implementation just retrieves |
| * it from the norrmal FileSystem factory/cache, with the local configuration |
| * @param uri URI of FS |
| * @return the filesystem |
| * @throws IOException IO problems |
| */ |
| public FileSystem getFileSystem(URI uri) throws IOException { |
| return FileSystem.get(uri, getConf()); |
| } |
| |
| /** |
| * Get the filesystem for these tests |
| * @return the test fs |
| * @throws IOException IO problems |
| */ |
| public abstract FileSystem getTestFileSystem() throws IOException; |
| |
| /** |
| * Get the scheme of this FS |
| * @return the scheme this FS supports |
| */ |
| public abstract String getScheme(); |
| |
| /** |
| * Return the path string for tests, e.g. <code>file:///tmp</code> |
| * @return a path in the test FS |
| */ |
| public abstract Path getTestPath(); |
| |
| /** |
| * Boolean to indicate whether or not the contract test are enabled |
| * for this test run. |
| * @return true if the tests can be run. |
| */ |
| public boolean isEnabled() { |
| return enabled; |
| } |
| |
| /** |
| * Boolean to indicate whether or not the contract test are enabled |
| * for this test run. |
| * @param enabled flag which must be true if the tests can be run. |
| */ |
| public void setEnabled(boolean enabled) { |
| this.enabled = enabled; |
| } |
| |
| /** |
| * Query for a feature being supported. This may include a probe for the feature |
| * |
| * @param feature feature to query |
| * @param defval default value |
| * @return true if the feature is supported |
| */ |
| public boolean isSupported(String feature, boolean defval) { |
| return getConf().getBoolean(getConfKey(feature), defval); |
| } |
| |
| /** |
| * Query for a feature's limit. This may include a probe for the feature |
| * |
| * @param feature feature to query |
| * @param defval default value |
| * @return true if the feature is supported |
| */ |
| public int getLimit(String feature, int defval) { |
| return getConf().getInt(getConfKey(feature), defval); |
| } |
| |
| public String getOption(String feature, String defval) { |
| return getConf().get(getConfKey(feature), defval); |
| } |
| |
| /** |
| * Build a configuration key |
| * @param feature feature to query |
| * @return the configuration key base with the feature appended |
| */ |
| public String getConfKey(String feature) { |
| return ContractOptions.FS_CONTRACT_KEY + feature; |
| } |
| |
| /** |
| * Create a URI off the scheme |
| * @param path path of URI |
| * @return a URI |
| * @throws IOException if the URI could not be created |
| */ |
| protected URI toURI(String path) throws IOException { |
| try { |
| return new URI(getScheme(),path, null); |
| } catch (URISyntaxException e) { |
| throw new IOException(e.toString() + " with " + path, e); |
| } |
| } |
| |
| @Override |
| public String toString() { |
| return "FSContract for " + getScheme(); |
| } |
| |
| } |