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b84aaf3ab0
(Tom White via Arvind Prabhakar) From: Arvind Prabhakar <arvind@cloudera.com> git-svn-id: https://svn.apache.org/repos/asf/incubator/sqoop/trunk@1150039 13f79535-47bb-0310-9956-ffa450edef68
123 lines
4.1 KiB
Java
123 lines
4.1 KiB
Java
/**
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* Licensed to Cloudera, Inc. under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. Cloudera, Inc. licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.cloudera.sqoop.util;
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import java.io.IOException;
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import java.io.File;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import org.apache.hadoop.io.compress.CompressionCodec;
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import org.apache.hadoop.io.compress.GzipCodec;
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import org.apache.hadoop.conf.Configuration;
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import com.cloudera.sqoop.SqoopOptions;
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import com.cloudera.sqoop.io.CodecMap;
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import com.cloudera.sqoop.io.SplittingOutputStream;
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import com.cloudera.sqoop.io.SplittableBufferedWriter;
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import org.apache.hadoop.util.Shell;
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import com.cloudera.sqoop.manager.ImportJobContext;
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/**
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* Utility methods that are common to various the direct import managers.
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*/
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public final class DirectImportUtils {
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public static final Log LOG = LogFactory.getLog(
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DirectImportUtils.class.getName());
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private DirectImportUtils() {
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}
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/**
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* Executes chmod on the specified file, passing in the mode string 'modstr'
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* which may be e.g. "a+x" or "0600", etc.
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* @throws IOException if chmod failed.
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*/
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public static void setFilePermissions(File file, String modstr)
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throws IOException {
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// Set this file to be 0600. Java doesn't have a built-in mechanism for this
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// so we need to go out to the shell to execute chmod.
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try {
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Shell.execCommand("chmod", modstr, file.toString());
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} catch (IOException ioe) {
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// Shell.execCommand will throw IOException on exit code != 0.
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LOG.error("Could not chmod " + modstr + " " + file.toString());
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throw new IOException("Could not ensure password file security.", ioe);
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}
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}
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/**
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* Open a file in HDFS for write to hold the data associated with a table.
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* Creates any necessary directories, and returns the OutputStream to write
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* to. The caller is responsible for calling the close() method on the
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* returned stream.
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*/
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public static SplittableBufferedWriter createHdfsSink(Configuration conf,
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SqoopOptions options, ImportJobContext context) throws IOException {
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FileSystem fs = FileSystem.get(conf);
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Path destDir = context.getDestination();
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LOG.debug("Writing to filesystem: " + conf.get("fs.default.name"));
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LOG.debug("Creating destination directory " + destDir);
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fs.mkdirs(destDir);
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// This Writer will be closed by the caller.
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return new SplittableBufferedWriter(
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new SplittingOutputStream(conf, destDir, "data-",
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options.getDirectSplitSize(), getCodec(conf, options)));
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}
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private static CompressionCodec getCodec(Configuration conf,
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SqoopOptions options) throws IOException {
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if (options.shouldUseCompression()) {
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if (options.getCompressionCodec() == null) {
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return new GzipCodec();
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} else {
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return CodecMap.getCodec(options.getCompressionCodec(), conf);
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}
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}
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return null;
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}
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/** @return true if someHost refers to localhost.
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*/
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public static boolean isLocalhost(String someHost) {
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if (null == someHost) {
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return false;
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}
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try {
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InetAddress localHostAddr = InetAddress.getLocalHost();
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InetAddress someAddr = InetAddress.getByName(someHost);
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return localHostAddr.equals(someAddr);
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} catch (UnknownHostException uhe) {
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return false;
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}
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}
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}
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