| /* |
| * 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.flink.fs.openstackhadoop; |
| |
| import org.apache.flink.configuration.Configuration; |
| import org.apache.flink.configuration.ConfigurationUtils; |
| import org.apache.flink.core.fs.FileSystem; |
| import org.apache.flink.core.fs.FileSystemFactory; |
| import org.apache.flink.runtime.fs.hdfs.HadoopFileSystem; |
| import org.apache.flink.runtime.util.HadoopUtils; |
| |
| import org.apache.hadoop.fs.swift.snative.SwiftNativeFileSystem; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URI; |
| |
| /** |
| * Simple factory for the Swift file system. |
| */ |
| public class SwiftFileSystemFactory implements FileSystemFactory { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(SwiftFileSystemFactory.class); |
| |
| /** The prefixes that Flink adds to the Hadoop config under 'fs.swift.'. */ |
| private static final String CONFIG_PREFIX = "swift."; |
| |
| /** Flink's configuration object. */ |
| private Configuration flinkConfig; |
| |
| /** Hadoop's configuration for the file systems, lazily initialized. */ |
| private org.apache.hadoop.conf.Configuration hadoopConfig; |
| |
| @Override |
| public String getScheme() { |
| return "swift"; |
| } |
| |
| @Override |
| public void configure(Configuration config) { |
| flinkConfig = config; |
| hadoopConfig = null; |
| } |
| |
| @Override |
| public FileSystem create(URI fsUri) throws IOException { |
| LOG.debug("Creating swift file system (backed by a Hadoop native swift file system)"); |
| |
| try { |
| // -- (1) get the loaded Hadoop config (or fall back to one loaded from the classpath) |
| |
| org.apache.hadoop.conf.Configuration hadoopConfig = this.hadoopConfig; |
| if (hadoopConfig == null) { |
| if (flinkConfig != null) { |
| LOG.debug("Loading Hadoop configuration for swift native file system"); |
| hadoopConfig = HadoopUtils.getHadoopConfiguration(flinkConfig); |
| |
| // hadoop.tmp.dir needs to be defined because it is used as buffer directory |
| if (hadoopConfig.get("hadoop.tmp.dir") == null) { |
| String[] tmpDirPaths = ConfigurationUtils.parseTempDirectories(flinkConfig); |
| File tmpDir = new File(tmpDirPaths[0], "hadoop-" + System.getProperty("user.name")); |
| hadoopConfig.set("hadoop.tmp.dir", tmpDir.getPath()); |
| } |
| |
| // add additional config entries from the Flink config to the Hadoop config |
| for (String key : flinkConfig.keySet()) { |
| if (key.startsWith(CONFIG_PREFIX)) { |
| String value = flinkConfig.getString(key, null); |
| String newKey = "fs.swift." + key.substring(CONFIG_PREFIX.length()); |
| hadoopConfig.set(newKey, value); |
| |
| LOG.debug("Adding Flink config entry for {} as {}={} to Hadoop config for " + |
| "Swift native File System", key, newKey, value); |
| } |
| } |
| |
| this.hadoopConfig = hadoopConfig; |
| } |
| else { |
| LOG.warn("The factory has not been configured prior to loading the Swift native file system." |
| + " Using Hadoop configuration from the classpath."); |
| |
| hadoopConfig = new org.apache.hadoop.conf.Configuration(); |
| this.hadoopConfig = hadoopConfig; |
| } |
| } |
| |
| // -- (2) Instantiate the Hadoop file system class for that scheme |
| |
| final String scheme = fsUri.getScheme(); |
| final String authority = fsUri.getAuthority(); |
| |
| if (scheme == null && authority == null) { |
| fsUri = org.apache.hadoop.fs.FileSystem.getDefaultUri(hadoopConfig); |
| } |
| else if (scheme != null && authority == null) { |
| URI defaultUri = org.apache.hadoop.fs.FileSystem.getDefaultUri(hadoopConfig); |
| if (scheme.equals(defaultUri.getScheme()) && defaultUri.getAuthority() != null) { |
| fsUri = defaultUri; |
| } |
| } |
| |
| LOG.debug("Using scheme {} for swift file system backing the Swift Native File System", fsUri); |
| |
| final SwiftNativeFileSystem fs = new SwiftNativeFileSystem(); |
| fs.initialize(fsUri, hadoopConfig); |
| |
| return new HadoopFileSystem(hadoopConfig, fs); |
| } |
| catch (IOException e) { |
| throw e; |
| } |
| catch (Exception e) { |
| throw new IOException(e.getMessage(), e); |
| } |
| } |
| } |