| /** |
| * 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 |
| * <p> |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * <p> |
| * 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.oozie.ambari.view; |
| |
| import com.google.common.base.Optional; |
| import org.apache.ambari.view.ViewContext; |
| import org.apache.ambari.view.commons.hdfs.UserService; |
| import org.apache.ambari.view.commons.hdfs.ViewPropertyHelper; |
| import org.apache.ambari.view.utils.hdfs.ConfigurationBuilder; |
| import org.apache.ambari.view.utils.hdfs.HdfsApi; |
| import org.apache.ambari.view.utils.hdfs.HdfsApiException; |
| import org.apache.ambari.view.utils.hdfs.HdfsUtil; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileStatus; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.FileNotFoundException; |
| import java.io.IOException; |
| import java.net.URI; |
| import java.net.URISyntaxException; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Arrays; |
| import java.util.List; |
| import java.util.LinkedList; |
| |
| public class HDFSFileUtils { |
| public static final String VIEW_CONF_KEYVALUES = "view.conf.keyvalues"; |
| private static final String DEFAULT_FS = "fs.defaultFS"; |
| private static final String AMBARI_SKIP_HOME_DIRECTORY_CHECK_PROTOCOL_LIST = "views.skip.home-directory-check.file-system.list"; |
| private final static Logger LOGGER = LoggerFactory |
| .getLogger(HDFSFileUtils.class); |
| private ViewContext viewContext; |
| |
| public HDFSFileUtils(ViewContext viewContext) { |
| super(); |
| this.viewContext = viewContext; |
| } |
| |
| public boolean fileExists(String path) { |
| try { |
| return getHdfsgetApi().exists(path); |
| } catch (IOException e) { |
| LOGGER.error(e.getMessage(), e); |
| throw new RuntimeException(e); |
| } catch (InterruptedException e) { |
| LOGGER.error(e.getMessage(), e); |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public FSDataInputStream read(String filePath) throws IOException { |
| FSDataInputStream is; |
| try { |
| is = getHdfsgetApi().open(filePath); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| return is; |
| } |
| |
| public String writeToFile(String filePath, String content, boolean overwrite) |
| throws IOException { |
| FSDataOutputStream fsOut; |
| try { |
| fsOut = getHdfsgetApi().create(filePath, overwrite); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| fsOut.write(content.getBytes()); |
| fsOut.close(); |
| return filePath; |
| } |
| |
| public void deleteFile(String filePath) throws IOException { |
| try { |
| getHdfsgetApi().delete(filePath, false); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| private HdfsApi getHdfsgetApi() { |
| try { |
| Optional<Map<String, String>> props = ViewPropertyHelper.getViewConfigs(viewContext, VIEW_CONF_KEYVALUES); |
| HdfsApi api; |
| if(props.isPresent()){ |
| api = HdfsUtil.connectToHDFSApi(viewContext, props.get()); |
| }else{ |
| api = HdfsUtil.connectToHDFSApi(viewContext); |
| } |
| |
| return api; |
| } catch (Exception ex) { |
| LOGGER.error("Error in getting HDFS Api", ex); |
| throw new RuntimeException( |
| "HdfsApi connection failed. Check \"webhdfs.url\" property", |
| ex); |
| } |
| } |
| |
| public Boolean shouldCheckForHomeDir(){ |
| Optional<Map<String, String>> viewConfigs = ViewPropertyHelper.getViewConfigs(viewContext, VIEW_CONF_KEYVALUES); |
| ConfigurationBuilder configBuilder; |
| if(viewConfigs.isPresent()) { |
| configBuilder = new ConfigurationBuilder(this.viewContext, viewConfigs.get()); |
| }else{ |
| configBuilder = new ConfigurationBuilder(this.viewContext); |
| } |
| Configuration configurations = null; |
| try { |
| configurations = configBuilder.buildConfig(); |
| } catch (HdfsApiException e) { |
| throw new RuntimeException(e); |
| } |
| String defaultFS = configurations.get(DEFAULT_FS); |
| try { |
| URI fsUri = new URI(defaultFS); |
| String protocol = fsUri.getScheme(); |
| String ambariSkipCheckValues = viewContext.getAmbariProperty(AMBARI_SKIP_HOME_DIRECTORY_CHECK_PROTOCOL_LIST); |
| List<String> protocolSkipList = (ambariSkipCheckValues == null? new LinkedList<String>() : Arrays.asList(ambariSkipCheckValues.split(","))); |
| if(null != protocol && protocolSkipList.contains(protocol)){ |
| return Boolean.FALSE; |
| } |
| } catch (URISyntaxException e) { |
| LOGGER.error("Error occurred while parsing the defaultFS URI.", e); |
| return Boolean.TRUE; |
| } |
| return Boolean.TRUE; |
| } |
| |
| public FileStatus getFileStatus(String filePath) { |
| try { |
| return getHdfsgetApi().getFileStatus(filePath); |
| } catch (FileNotFoundException e) { |
| throw new RuntimeException(e); |
| } catch (IOException e) { |
| throw new RuntimeException(e); |
| } catch (InterruptedException e) { |
| throw new RuntimeException(e); |
| } |
| |
| } |
| public boolean hdfsCheck() { |
| try { |
| getHdfsgetApi().getStatus(); |
| return true; |
| } catch (Exception e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| public boolean homeDirCheck(){ |
| UserService userservice = new UserService(viewContext, getViewConfigs(viewContext)); |
| userservice.homeDir(); |
| return true; |
| } |
| private Map<String,String> getViewConfigs(ViewContext context) { |
| Optional<Map<String, String>> props = ViewPropertyHelper.getViewConfigs(context, VIEW_CONF_KEYVALUES); |
| return props.isPresent()? props.get() : new HashMap<String, String>(); |
| } |
| } |