| /* |
| * 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.ozone.web.ozShell.keys; |
| |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileOutputStream; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import org.apache.hadoop.conf.StorageUnit; |
| import org.apache.hadoop.hdds.conf.OzoneConfiguration; |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.hadoop.ozone.client.OzoneBucket; |
| import org.apache.hadoop.ozone.client.OzoneClient; |
| import org.apache.hadoop.ozone.client.OzoneClientException; |
| import org.apache.hadoop.ozone.client.OzoneVolume; |
| import org.apache.hadoop.ozone.client.io.OzoneInputStream; |
| import org.apache.hadoop.ozone.web.ozShell.Handler; |
| import org.apache.hadoop.ozone.web.ozShell.OzoneAddress; |
| import org.apache.hadoop.ozone.web.ozShell.Shell; |
| |
| import org.apache.commons.codec.digest.DigestUtils; |
| import static org.apache.hadoop.hdds.scm.ScmConfigKeys.OZONE_SCM_CHUNK_SIZE_DEFAULT; |
| import static org.apache.hadoop.hdds.scm.ScmConfigKeys.OZONE_SCM_CHUNK_SIZE_KEY; |
| import picocli.CommandLine.Command; |
| import picocli.CommandLine.Parameters; |
| |
| /** |
| * Gets an existing key. |
| */ |
| @Command(name = "get", |
| description = "Gets a specific key from ozone server") |
| public class GetKeyHandler extends Handler { |
| |
| @Parameters(index = "0", arity = "1..1", description = |
| Shell.OZONE_KEY_URI_DESCRIPTION) |
| private String uri; |
| |
| @Parameters(index = "1", arity = "1..1", |
| description = "File path to download the key to") |
| private String fileName; |
| |
| /** |
| * Executes the Client Calls. |
| */ |
| @Override |
| public Void call() throws Exception { |
| |
| OzoneAddress address = new OzoneAddress(uri); |
| address.ensureKeyAddress(); |
| OzoneClient client = address.createClient(createOzoneConfiguration()); |
| |
| String volumeName = address.getVolumeName(); |
| String bucketName = address.getBucketName(); |
| String keyName = address.getKeyName(); |
| |
| if (isVerbose()) { |
| System.out.printf("Volume Name : %s%n", volumeName); |
| System.out.printf("Bucket Name : %s%n", bucketName); |
| System.out.printf("Key Name : %s%n", keyName); |
| } |
| |
| Path dataFilePath = Paths.get(fileName); |
| File dataFile = new File(fileName); |
| |
| if (dataFile.exists() && dataFile.isDirectory()) { |
| dataFile = new File(fileName, keyName); |
| } |
| |
| if (dataFile.exists()) { |
| throw new OzoneClientException( |
| fileName + "exists. Download will overwrite an " |
| + "existing file. Aborting."); |
| } |
| |
| OzoneVolume vol = client.getObjectStore().getVolume(volumeName); |
| OzoneBucket bucket = vol.getBucket(bucketName); |
| OzoneInputStream keyInputStream = bucket.readKey(keyName); |
| if (dataFilePath != null) { |
| FileOutputStream outputStream = new FileOutputStream(dataFile); |
| IOUtils.copyBytes(keyInputStream, outputStream, |
| (int) new OzoneConfiguration() |
| .getStorageSize(OZONE_SCM_CHUNK_SIZE_KEY, |
| OZONE_SCM_CHUNK_SIZE_DEFAULT, StorageUnit.BYTES)); |
| outputStream.close(); |
| } else { |
| throw new OzoneClientException( |
| "Can not access the file \"" + fileName + "\""); |
| } |
| if (isVerbose()) { |
| FileInputStream stream = new FileInputStream(dataFile); |
| String hash = DigestUtils.md5Hex(stream); |
| System.out.printf("Downloaded file hash : %s%n", hash); |
| stream.close(); |
| } |
| return null; |
| } |
| } |