[FLINK-17266] Make WorkerResourceSpec serializable

The MesosWorkerStore requires that the WorkerResourceSpec is serializable
because it stores it as part of MesosWorkerStore.Worker in serialized format.

This closes apache#11821.

flink-mesos/src/test/java/org/apache/flink/mesos/runtime/clusterframework/store/MesosWorkerStoreTest.java

@@ -0,0 +1,51 @@
+/*
+ * 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:https://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.mesos.runtime.clusterframework.store;
+
+import org.apache.flink.runtime.resourcemanager.WorkerResourceSpec;
+import org.apache.flink.util.InstantiationUtil;
+import org.apache.flink.util.TestLogger;
+
+import org.apache.mesos.Protos;
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
+
+/**
+ * Tests for the {@link MesosWorkerStore}.
+ */
+public class MesosWorkerStoreTest extends TestLogger {
+
+ /**
+ * Tests that {@link MesosWorkerStore.Worker} is serializable.
+ */
+ @Test
+ public void workerIsSerializable() {
+ final Protos.TaskID taskId = Protos.TaskID.newBuilder().setValue("foobar").build();
+ final WorkerResourceSpec workerResourceSpec = new WorkerResourceSpec.Builder().build();
+ final Protos.SlaveID slaveId = Protos.SlaveID.newBuilder().setValue("barfoo").build();
+ final String hostname = "foobar";
+
+ final MesosWorkerStore.Worker worker = MesosWorkerStore.Worker.newWorker(taskId, workerResourceSpec);
+ final MesosWorkerStore.Worker launchedWorker = worker.launchWorker(slaveId, hostname);
+
+ assertTrue(InstantiationUtil.isSerializable(worker));
+ assertTrue(InstantiationUtil.isSerializable(launchedWorker));
+ }
+}

flink-runtime/src/main/java/org/apache/flink/runtime/resourcemanager/WorkerResourceSpec.java

@@ -23,12 +23,15 @@
 import org.apache.flink.runtime.clusterframework.TaskExecutorProcessSpec;
 import org.apache.flink.util.Preconditions;
 
+import java.io.Serializable;
 import java.util.Objects;
 
 /**
  * Resource specification of a worker, mainly used by SlotManager requesting from ResourceManager.
  */
-public class WorkerResourceSpec {
+public final class WorkerResourceSpec implements Serializable {
+
+ private static final long serialVersionUID = 1L;
 
  public static final WorkerResourceSpec ZERO = new Builder().build();