[GitHub] [storm] govind-menon commented on a change in pull request #3244: [STORM-3600] Add caching in Cluster.calculateSharedOffHeapNodeMemory

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govind-menon commented on a change in pull request #3244: [STORM-3600] Add caching in Cluster.calculateSharedOffHeapNodeMemory
URL: https://github.com/apache/storm/pull/3244#discussion_r407732285
 
 

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 File path: storm-server/src/test/java/org/apache/storm/scheduler/resource/strategies/scheduling/TestLargeCluster.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
+ * <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.storm.scheduler.resource.strategies.scheduling;
+
+import org.apache.logging.log4j.Level;
+import org.apache.logging.log4j.core.config.Configurator;
+import org.apache.storm.Config;
+import org.apache.storm.DaemonConfig;
+import org.apache.storm.generated.StormTopology;
+import org.apache.storm.metric.StormMetricsRegistry;
+import org.apache.storm.scheduler.Cluster;
+import org.apache.storm.scheduler.ExecutorDetails;
+import org.apache.storm.scheduler.INimbus;
+import org.apache.storm.scheduler.IScheduler;
+import org.apache.storm.scheduler.SupervisorDetails;
+import org.apache.storm.scheduler.Topologies;
+import org.apache.storm.scheduler.TopologyDetails;
+import org.apache.storm.scheduler.WorkerSlot;
+import org.apache.storm.scheduler.resource.ResourceAwareScheduler;
+import org.apache.storm.scheduler.resource.TestUtilsForResourceAwareScheduler;
+import org.apache.storm.scheduler.resource.normalization.NormalizedResources;
+import org.apache.storm.scheduler.resource.normalization.NormalizedResourcesExtension;
+import org.apache.storm.scheduler.resource.normalization.ResourceMetrics;
+import org.apache.storm.utils.ObjectReader;
+import org.apache.storm.utils.Time;
+import org.apache.storm.utils.Utils;
+import org.junit.Assert;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+@ExtendWith({NormalizedResourcesExtension.class})
+public class TestLargeCluster {
+    private static final Logger LOG = LoggerFactory.getLogger(TestLargeCluster.class);
+
+    public static final String TEST_CLUSTER_NAME = "largeCluster01";
+    public static final String TEST_RESOURCE_PATH = "clusterconf/" + TEST_CLUSTER_NAME;
+
+    private static IScheduler scheduler = null;
+
+    @AfterEach
+    public void cleanup() {
+        if (scheduler != null) {
+            scheduler.cleanup();
+            scheduler = null;
+        }
+    }
+
+    /**
+     * Get the list of serialized topology (*code.ser) and configuration (*conf.ser)
+     * resource files in the path. The resources are sorted so that paired topology and conf
+     * files are sequential. Unpaired files may be ignored by the caller.
+     *
+     * @param path directory in which resources exist.
+     * @return
+     * @throws IOException
+     */
+    public static List<String> getResourceFiles(String path) throws IOException {
+        List<String> fileNames = new ArrayList<>();
+
+        try (
+                InputStream in = getResourceAsStream(path);
+                BufferedReader br = new BufferedReader(new InputStreamReader(in))
+        ) {
+            String resource;
+
+            while ((resource = br.readLine()) != null) {
+                if (resource.endsWith("code.ser") || resource.endsWith("conf.ser")) {
+                    fileNames.add(path + "/" + resource);
+                }
+            }
+            Collections.sort(fileNames);
+        }
+        return fileNames;
+    }
+
+    /**
+     * InputStream to read the fully qualified resource path.
+     *
+     * @param resource
+     * @return
+     */
+    public static InputStream getResourceAsStream(String resource) {
+        final InputStream in = getContextClassLoader().getResourceAsStream(resource);
+        return in == null ? ClassLoader.getSystemClassLoader().getResourceAsStream(resource) : in;
+    }
+
+    /**
+     * Read the contents of the fully qualified resource path.
+     *
+     * @param resource
+     * @return
+     * @throws Exception
+     */
+    public static byte[] getResourceAsBytes(String resource) throws Exception {
+        InputStream in = getResourceAsStream(resource);
+        if (in == null) {
+            return null;
+        }
+        try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
+            while (in.available() > 0) {
+                out.write(in.read());
+            }
+            return out.toByteArray();
 
 Review comment:
   Agreed - try with resources will close as part of the "destructor"

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