Added name for thread pool

input-stream/src/main/java/software/amazon/s3/analyticsaccelerator/S3SeekableInputStreamFactory.java

@@ -36,6 +36,7 @@
 import software.amazon.s3.analyticsaccelerator.io.physical.impl.PhysicalIOImpl;
 import software.amazon.s3.analyticsaccelerator.request.ObjectClient;
 import software.amazon.s3.analyticsaccelerator.request.ObjectMetadata;
+import software.amazon.s3.analyticsaccelerator.util.NamedThreadFactory;
 import software.amazon.s3.analyticsaccelerator.util.ObjectFormatSelector;
 import software.amazon.s3.analyticsaccelerator.util.OpenStreamInformation;
 import software.amazon.s3.analyticsaccelerator.util.S3URI;
@@ -62,6 +63,7 @@ public class S3SeekableInputStreamFactory implements AutoCloseable {
   private final ExecutorService threadPool;
 
   private static final Logger LOG = LoggerFactory.getLogger(S3SeekableInputStreamFactory.class);
+  private static final String THREAD_FACTORY_NAME = "s3-analytics-accelerator-";
 
   /**
    * Creates a new instance of {@link S3SeekableInputStreamFactory}. This factory should be used to
@@ -87,7 +89,8 @@ public S3SeekableInputStreamFactory(
     // TODO: calling applications should be able to pass in a thread pool if they so wish
     this.threadPool =
         Executors.newFixedThreadPool(
-            configuration.getPhysicalIOConfiguration().getThreadPoolSize());
+            configuration.getPhysicalIOConfiguration().getThreadPoolSize(),
+            new NamedThreadFactory(THREAD_FACTORY_NAME, true));
     this.objectBlobStore =
         new BlobStore(
             objectClient,

input-stream/src/main/java/software/amazon/s3/analyticsaccelerator/util/NamedThreadFactory.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed 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 software.amazon.s3.analyticsaccelerator.util;
+
+import java.util.concurrent.ThreadFactory;
+import java.util.concurrent.atomic.AtomicInteger;
+
+/** ThreadFactory that creates named threads with configurable daemon status. */
+public class NamedThreadFactory implements ThreadFactory {
+  private final AtomicInteger threadNumber = new AtomicInteger(1);
+  private final String namePrefix;
+  private final boolean daemon;
+
+  /**
+   * Constructor
+   *
+   * @param namePrefix name
+   * @param daemon is daemon
+   */
+  public NamedThreadFactory(String namePrefix, boolean daemon) {
+    this.namePrefix = namePrefix;
+    this.daemon = daemon;
+  }
+
+  @Override
+  public Thread newThread(Runnable r) {
+    Thread t = new Thread(r, namePrefix + threadNumber.getAndIncrement());
+    t.setDaemon(daemon);
+    return t;
+  }
+}

input-stream/src/test/java/software/amazon/s3/analyticsaccelerator/util/NamedThreadFactoryTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Licensed 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 software.amazon.s3.analyticsaccelerator.util;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+import org.junit.jupiter.api.Test;
+
+class NamedThreadFactoryTest {
+
+  @Test
+  void testThreadNaming() {
+    NamedThreadFactory factory = new NamedThreadFactory("test-", true);
+
+    Thread thread1 = factory.newThread(() -> {});
+    Thread thread2 = factory.newThread(() -> {});
+
+    assertEquals("test-1", thread1.getName());
+    assertEquals("test-2", thread2.getName());
+  }
+
+  @Test
+  void testDaemonThread() {
+    NamedThreadFactory factory = new NamedThreadFactory("daemon-", true);
+
+    Thread thread = factory.newThread(() -> {});
+
+    assertTrue(thread.isDaemon());
+  }
+}