| /* |
| * 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.util.Iterator; |
| |
| import org.apache.hadoop.ozone.client.OzoneBucket; |
| import org.apache.hadoop.ozone.client.OzoneClient; |
| import org.apache.hadoop.ozone.client.OzoneKey; |
| import org.apache.hadoop.ozone.client.OzoneVolume; |
| import org.apache.hadoop.ozone.web.ozShell.Handler; |
| import org.apache.hadoop.ozone.web.ozShell.ObjectPrinter; |
| import org.apache.hadoop.ozone.web.ozShell.OzoneAddress; |
| import org.apache.hadoop.ozone.web.ozShell.Shell; |
| |
| import picocli.CommandLine.Command; |
| import picocli.CommandLine.Option; |
| import picocli.CommandLine.Parameters; |
| |
| /** |
| * Executes List Keys. |
| */ |
| @Command(name = "list", |
| aliases = "ls", |
| description = "list all keys in a given bucket") |
| public class ListKeyHandler extends Handler { |
| |
| @Parameters(arity = "1..1", description = Shell.OZONE_BUCKET_URI_DESCRIPTION) |
| private String uri; |
| |
| @Option(names = {"--length", "-l"}, |
| description = "Limit of the max results", |
| defaultValue = "100") |
| private int maxKeys; |
| |
| @Option(names = {"--start", "-s"}, |
| description = "The first key to start the listing") |
| private String startKey; |
| |
| @Option(names = {"--prefix", "-p"}, |
| description = "Prefix to filter the key") |
| private String prefix; |
| |
| /** |
| * Executes the Client Calls. |
| */ |
| @Override |
| public Void call() throws Exception { |
| |
| OzoneAddress address = new OzoneAddress(uri); |
| address.ensureBucketAddress(); |
| OzoneClient client = address.createClient(createOzoneConfiguration()); |
| |
| String volumeName = address.getVolumeName(); |
| String bucketName = address.getBucketName(); |
| |
| if (maxKeys < 1) { |
| throw new IllegalArgumentException( |
| "the length should be a positive number"); |
| } |
| |
| if (isVerbose()) { |
| System.out.printf("Volume Name : %s%n", volumeName); |
| System.out.printf("bucket Name : %s%n", bucketName); |
| } |
| |
| OzoneVolume vol = client.getObjectStore().getVolume(volumeName); |
| OzoneBucket bucket = vol.getBucket(bucketName); |
| Iterator<? extends OzoneKey> keyIterator = bucket.listKeys(prefix, |
| startKey); |
| |
| int maxKeyLimit = maxKeys; |
| |
| int counter = 0; |
| while (maxKeys > 0 && keyIterator.hasNext()) { |
| OzoneKey ozoneKey = keyIterator.next(); |
| ObjectPrinter.printObjectAsJson(ozoneKey); |
| maxKeys -= 1; |
| counter++; |
| } |
| |
| // More keys were returned notify about max length |
| if (keyIterator.hasNext()) { |
| System.out.println("Listing first " + maxKeyLimit + " entries of the " + |
| "result. Use --length (-l) to override max returned keys."); |
| } else if (isVerbose()) { |
| System.out.printf("Found : %d keys for bucket %s in volume : %s ", |
| counter, bucketName, volumeName); |
| } |
| |
| return null; |
| } |
| |
| } |