[GitHub] kl0u commented on a change in pull request #6957: [FLINK-10627][E2E tests] Test s3 output for streaming file sink

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kl0u commented on a change in pull request #6957: [FLINK-10627][E2E tests] Test s3 output for streaming file sink
URL: https://github.com/apache/flink/pull/6957#discussion_r230066827
 
 

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 File path: flink-end-to-end-tests/flink-e2e-test-utils/src/main/java/org/apache/flink/streaming/tests/util/s3/S3UtilProgram.java
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+/*
+ * 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.flink.streaming.tests.util.s3;
+
+import org.apache.flink.api.java.utils.ParameterTool;
+
+import com.amazonaws.services.s3.AmazonS3;
+import com.amazonaws.services.s3.AmazonS3ClientBuilder;
+import com.amazonaws.services.s3.model.DeleteObjectsRequest;
+import com.amazonaws.services.s3.model.S3ObjectSummary;
+import com.amazonaws.services.s3.transfer.KeyFilter;
+import com.amazonaws.services.s3.transfer.TransferManager;
+import com.amazonaws.services.s3.transfer.TransferManagerBuilder;
+
+import java.io.File;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+import java.util.function.Consumer;
+import java.util.function.Predicate;
+import java.util.stream.Collectors;
+
+/**
+ * S3 utilities.
+ *
+ * <p>Usage: java -jar S3UtilProgram.jar args.
+ *
+ * <p>Note: {@code S3UtilProgram.Action.lineNumber*} actions are applicable only
+ * to valid non-compressed CSV comma separated files.
+ *
+ * <p>Program parameters:
+ * <ul>
+ *     <li>action (string, required): Action to perform, see {@link S3UtilProgram.Action}.</li>
+ *     <li>bucket (string, required): Bucket where s3 objects reside.</li>
+ *     <li>s3file (string, required for single object actions): s3 object key.</li>
+ *     <li>s3prefix (string, required for actions over objects grouped by key prefix): s3 key prefix.</li>
+ *     <li>s3filePrefix (string, optional for downloadByPrefix or numberOfLinesByPrefix): s3 file name prefix w/o directory to filter files by name.</li>
+ *     <li>localFile (string, required for single file actions): local file path.</li>
+ *     <li>localFolder (string, required for actions over folders): local folder path.</li>
+ *     <li>parallelism (int, default 10): parallelism for parallelizable actions (e.g. {@code numberOfLinesByPrefix}).</li>
+ * </ul>
+ */
+class S3UtilProgram {
+	enum Action {
+		listByPrefix,
+		downloadFile,
+		downloadByPrefix,
+		deleteFile,
+		deleteByPrefix,
+		numberOfLinesInFile,
+		numberOfLinesByPrefix
+	}
+
+	private static final Map<Action, Consumer<ParameterTool>> handlers;
+	static {
+		Map<Action, Consumer<ParameterTool>> handlersMutable = new HashMap<>();
+		handlersMutable.put(Action.listByPrefix, S3UtilProgram::listByPrefix);
+		handlersMutable.put(Action.downloadFile, S3UtilProgram::downloadFile);
+		handlersMutable.put(Action.downloadByPrefix, S3UtilProgram::downloadByPrefix);
+		handlersMutable.put(Action.deleteFile, S3UtilProgram::deleteFile);
+		handlersMutable.put(Action.deleteByPrefix, S3UtilProgram::deleteByPrefix);
+		handlersMutable.put(Action.numberOfLinesInFile, S3UtilProgram::numberOfLinesInFile);
+		handlersMutable.put(Action.numberOfLinesByPrefix, S3UtilProgram::numberOfLinesByPrefix);
+		handlers = Collections.unmodifiableMap(handlersMutable);
+	}
+
+	private static final String countQuery = "select count(*) from s3object";
+
+	public static void main(String[] args) {
+		final ParameterTool params = ParameterTool.fromArgs(args);
+		final Action action = Action.valueOf(params.getRequired("action"));
+		handlers.get(action).accept(params);
+	}
+
+	private static void listByPrefix(ParameterTool params) {
+		final String bucket = params.getRequired("bucket");
+		final String s3prefix = params.getRequired("s3prefix");
+		listByPrefix(bucket, s3prefix).forEach(System.out::println);
+	}
+
+	private static List<String> listByPrefix(final String bucket, final String s3prefix) {
+		return AmazonS3ClientBuilder.defaultClient().listObjects(bucket, s3prefix).getObjectSummaries()
+			.stream().map(S3ObjectSummary::getKey).collect(Collectors.toList());
+	}
+
+	private static void downloadFile(ParameterTool params) {
+		final String bucket = params.getRequired("bucket");
+		final String s3file = params.getRequired("s3file");
+		final String localFile = params.getRequired("localFile");
+		TransferManager tx = TransferManagerBuilder.defaultTransferManager();
+		try {
+			tx.download(bucket, s3file, new File(localFile)).waitForCompletion();
+		} catch (InterruptedException e) {
+			System.out.println("Transfer interrupted");
+		} finally {
+			tx.shutdownNow();
+		}
+	}
+
+	private static void downloadByPrefix(ParameterTool params) {
+		final String bucket = params.getRequired("bucket");
+		final String s3prefix = params.getRequired("s3prefix");
+		final String localFolder = params.getRequired("localFolder");
+		final String s3filePrefix = params.get("s3filePrefix", "");
+		TransferManager tx = TransferManagerBuilder.defaultTransferManager();
+		Predicate<String> keyPredicate = getKeyFilterByFileNamePrefix(s3filePrefix);
+		KeyFilter keyFilter = s3filePrefix.isEmpty() ? KeyFilter.INCLUDE_ALL :
+			objectSummary -> keyPredicate.test(objectSummary.getKey());
+		try {
+			tx.downloadDirectory(bucket, s3prefix, new File(localFolder), keyFilter).waitForCompletion();
+		} catch (InterruptedException e) {
+			System.out.println("Transfer interrupted");
+		} finally {
+			tx.shutdownNow();
+		}
+	}
+
+	private static Predicate<String> getKeyFilterByFileNamePrefix(String s3filePrefix) {
 
 Review comment:
   Rename to `getKeysWithFilenamePrefix`.

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