[FLINK-16057] Add ContinuousFileReaderOperator IO Benchmark

Author: Roman Khachatryan

src/main/java/org/apache/flink/benchmark/ContinuousFileReaderOperatorIoBenchmark.java

@@ -0,0 +1,73 @@
+/*
+ * 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.benchmark;
+
+import org.apache.flink.api.common.io.FileInputFormat;
+import org.apache.flink.api.common.restartstrategy.RestartStrategies;
+import org.apache.flink.api.java.io.TextInputFormat;
+import org.apache.flink.core.fs.Path;
+import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
+import org.apache.flink.streaming.api.functions.sink.DiscardingSink;
+import org.apache.flink.util.Preconditions;
+import org.openjdk.jmh.annotations.Benchmark;
+import org.openjdk.jmh.annotations.OperationsPerInvocation;
+import org.openjdk.jmh.annotations.Param;
+import org.openjdk.jmh.annotations.Setup;
+
+import java.io.File;
+import java.nio.file.Paths;
+
+@OperationsPerInvocation(value = ContinuousFileReaderOperatorIoBenchmark.RECORDS_PER_INVOCATION)
+public class ContinuousFileReaderOperatorIoBenchmark extends BenchmarkBase {
+
+    public static final int RECORDS_PER_INVOCATION = 1000_000;
+    private static final long CHECKPOINT_INTERVAL_MS = 100;
+
+    private FileInputFormat<?> fileReader;
+    private File path;
+
+    /**
+     * Name of the folder where the text files are located. Can be an arbitrary string but the total number of characters
+     * should match {@link #RECORDS_PER_INVOCATION}. Here, the following pattern is used: txt-nr_files-nr_lines-nr_symbols.
+     */
+    @Param({"txt-100-1000-10", "txt-1000-100-10"})
+    public String folder;
+
+    @Setup
+    public void setUp() {
+        java.nio.file.Path p = folder.startsWith("/") ? Paths.get(folder) : Paths.get("src/main/resources/", folder);
+        path = p.toAbsolutePath().toFile();
+        Preconditions.checkArgument(path.exists() && path.isDirectory() && path.canExecute(), "%s doesn't exist, is not a directory, or isn't readable", path);
+        fileReader = new TextInputFormat(new Path(path.toString()));
+    }
+
+    @Benchmark
+    public void readFiles(FlinkEnvironmentContext context) throws Exception {
+        StreamExecutionEnvironment env = context.env;
+
+        env.enableCheckpointing(CHECKPOINT_INTERVAL_MS)
+            .setParallelism(1)
+            .readFile(fileReader, path.toString())
+            .addSink(new DiscardingSink<>());
+
+        env.setRestartStrategy(new RestartStrategies.NoRestartStrategyConfiguration());
+
+        env.execute();
+    }
+
+}