| /** |
| * 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.sqoop.util; |
| |
| import java.io.IOException; |
| import java.io.File; |
| import java.net.InetAddress; |
| import java.net.UnknownHostException; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.compress.CompressionCodec; |
| import org.apache.hadoop.io.compress.GzipCodec; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.sqoop.SqoopOptions; |
| import org.apache.sqoop.io.CodecMap; |
| import org.apache.sqoop.io.SplittingOutputStream; |
| import org.apache.sqoop.io.SplittableBufferedWriter; |
| |
| import org.apache.hadoop.util.Shell; |
| import org.apache.sqoop.manager.ImportJobContext; |
| |
| /** |
| * Utility methods that are common to various the direct import managers. |
| */ |
| public final class DirectImportUtils { |
| |
| public static final Log LOG = LogFactory.getLog( |
| DirectImportUtils.class.getName()); |
| |
| private DirectImportUtils() { |
| } |
| |
| /** |
| * Executes chmod on the specified file, passing in the mode string 'modstr' |
| * which may be e.g. "a+x" or "0600", etc. |
| * @throws IOException if chmod failed. |
| */ |
| public static void setFilePermissions(File file, String modstr) |
| throws IOException { |
| // Set this file to be 0600. Java doesn't have a built-in mechanism for this |
| // so we need to go out to the shell to execute chmod. |
| try { |
| Shell.execCommand("chmod", modstr, file.toString()); |
| } catch (IOException ioe) { |
| // Shell.execCommand will throw IOException on exit code != 0. |
| LOG.error("Could not chmod " + modstr + " " + file.toString()); |
| throw new IOException("Could not ensure password file security.", ioe); |
| } |
| } |
| |
| /** |
| * Open a file in HDFS for write to hold the data associated with a table. |
| * Creates any necessary directories, and returns the OutputStream to write |
| * to. The caller is responsible for calling the close() method on the |
| * returned stream. |
| */ |
| public static SplittableBufferedWriter createHdfsSink(Configuration conf, |
| SqoopOptions options, ImportJobContext context) throws IOException { |
| |
| Path destDir = context.getDestination(); |
| FileSystem fs = destDir.getFileSystem(conf); |
| |
| LOG.debug("Writing to filesystem: " + fs.getUri()); |
| LOG.debug("Creating destination directory " + destDir); |
| fs.mkdirs(destDir); |
| |
| // This Writer will be closed by the caller. |
| return new SplittableBufferedWriter( |
| new SplittingOutputStream(conf, destDir, "part-m-", |
| options.getDirectSplitSize(), getCodec(conf, options))); |
| } |
| |
| private static CompressionCodec getCodec(Configuration conf, |
| SqoopOptions options) throws IOException { |
| if (options.shouldUseCompression()) { |
| if (options.getCompressionCodec() == null) { |
| return new GzipCodec(); |
| } else { |
| return CodecMap.getCodec(options.getCompressionCodec(), conf); |
| } |
| } |
| return null; |
| } |
| |
| /** @return true if someHost refers to localhost. |
| */ |
| public static boolean isLocalhost(String someHost) { |
| if (null == someHost) { |
| return false; |
| } |
| |
| try { |
| InetAddress localHostAddr = InetAddress.getLocalHost(); |
| InetAddress someAddr = InetAddress.getByName(someHost); |
| |
| return localHostAddr.equals(someAddr); |
| } catch (UnknownHostException uhe) { |
| return false; |
| } |
| } |
| |
| } |
| |