[GitHub] [flink] GJL commented on a change in pull request #10152: [FLINK-14466][runtime] Let YarnJobClusterEntrypoint use user code class loader

[GitBox <gi...@apache.org>]

GJL commented on a change in pull request #10152: [FLINK-14466][runtime] Let YarnJobClusterEntrypoint use user code class loader
URL: https://github.com/apache/flink/pull/10152#discussion_r345184839
 
 

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 File path: flink-runtime/src/test/java/org/apache/flink/runtime/entrypoint/component/FileJobGraphRetrieverTest.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.runtime.entrypoint.component;
+
+import org.apache.flink.api.common.JobID;
+import org.apache.flink.configuration.Configuration;
+import org.apache.flink.runtime.jobgraph.JobGraph;
+import org.apache.flink.runtime.jobgraph.JobVertex;
+import org.apache.flink.util.FileUtils;
+import org.apache.flink.util.FlinkException;
+import org.apache.flink.util.function.FunctionUtils;
+
+import org.junit.BeforeClass;
+import org.junit.ClassRule;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+
+import java.io.File;
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.net.URL;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+import static java.nio.file.StandardOpenOption.CREATE;
+import static org.apache.flink.runtime.entrypoint.component.FileJobGraphRetriever.JOB_GRAPH_FILE_PATH;
+import static org.hamcrest.Matchers.containsInAnyOrder;
+import static org.junit.Assert.assertThat;
+
+
+
+/**
+ * Tests for the {@link FileJobGraphRetriever}.
+ */
+public class FileJobGraphRetrieverTest {
+
+	@Rule
+	public final TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+	@ClassRule
+	public static final TemporaryFolder TEMPORARY_FOLDER = new TemporaryFolder();
+
+	private static final Configuration configuration = new Configuration();
+
+	private static Path jarFileInJobGraph;
+
+	@BeforeClass
+	public static void init() throws IOException {
+		final Path jobGraphPath = TEMPORARY_FOLDER.newFile(JOB_GRAPH_FILE_PATH.defaultValue()).toPath();
+
+		jarFileInJobGraph = TEMPORARY_FOLDER.newFile("jar_file_in_job_graph.jar").toPath();
+
+		final JobVertex source = new JobVertex("source");
+		final JobVertex target = new JobVertex("target");
+		final JobGraph jobGraph = new JobGraph(new JobID(), "test", source, target);
+
+		jobGraph.setClasspaths(Arrays.asList(jarFileInJobGraph.toUri().toURL()));
 
 Review comment:
   For single elements, you can use `Collections.singletonList()`, which returns an immutable list.

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