Implemented tpu_vm_stop and tpu_vm_start samples, created tests

Author: TetyanaYahodska

tpu/src/main/java/tpu/StartTpuVm.java

@@ -0,0 +1,59 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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 tpu;
+
+//[START tpu_vm_start]
+import com.google.cloud.tpu.v2.Node;
+import com.google.cloud.tpu.v2.NodeName;
+import com.google.cloud.tpu.v2.StartNodeRequest;
+import com.google.cloud.tpu.v2.TpuClient;
+import java.io.IOException;
+import java.util.concurrent.ExecutionException;
+
+public class StartTpuVm {
+
+  public static void main(String[] args)
+      throws IOException, ExecutionException, InterruptedException {
+    // TODO(developer): Replace these variables before running the sample.
+    // Project ID or project number of the Google Cloud project you want to create a node.
+    String projectId = "YOUR_PROJECT_ID";
+    // The zone in which to create the TPU.
+    // For more information about supported TPU types for specific zones,
+    // see https://cloud.google.com/tpu/docs/regions-zones
+    String zone = "europe-west4-a";
+    // The name for your TPU.
+    String nodeName = "YOUR_TPY_NAME";
+
+    startTpuVm(projectId, zone, nodeName);
+  }
+
+  // Starts a TPU VM with the specified name in the given project and zone.
+  public static void startTpuVm(String projectId, String zone, String nodeName)
+      throws IOException, ExecutionException, InterruptedException {
+    // Initialize client that will be used to send requests. This client only needs to be created
+    // once, and can be reused for multiple requests.
+    try (TpuClient tpuClient = TpuClient.create()) {
+      String name = NodeName.of(projectId, zone, nodeName).toString();
+
+      StartNodeRequest request = StartNodeRequest.newBuilder().setName(name).build();
+      Node response = tpuClient.startNodeAsync(request).get();
+
+      System.out.printf("TPU VM started: %s\n", response.getName());
+    }
+  }
+}
+//[END tpu_vm_start]

tpu/src/main/java/tpu/StopTpuVm.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2024 Google LLC
+ *
+ * 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 tpu;
+
+//[START tpu_vm_stop]
+import com.google.cloud.tpu.v2.Node;
+import com.google.cloud.tpu.v2.NodeName;
+import com.google.cloud.tpu.v2.StopNodeRequest;
+import com.google.cloud.tpu.v2.TpuClient;
+import java.io.IOException;
+import java.util.concurrent.ExecutionException;
+
+public class StopTpuVm {
+
+  public static void main(String[] args)
+      throws IOException, ExecutionException, InterruptedException {
+    // TODO(developer): Replace these variables before running the sample.
+    // Project ID or project number of the Google Cloud project you want to create a node.
+    String projectId = "YOUR_PROJECT_ID";
+    // The zone in which to create the TPU.
+    // For more information about supported TPU types for specific zones,
+    // see https://cloud.google.com/tpu/docs/regions-zones
+    String zone = "europe-west4-a";
+    // The name for your TPU.
+    String nodeName = "YOUR_TPY_NAME";
+
+    stopTpuVm(projectId, zone, nodeName);
+  }
+
+  // Stops a TPU VM with the specified name in the given project and zone.
+  public static void stopTpuVm(String projectId, String zone, String nodeName)
+      throws IOException, ExecutionException, InterruptedException {
+    // Initialize client that will be used to send requests. This client only needs to be created
+    // once, and can be reused for multiple requests.
+    try (TpuClient tpuClient = TpuClient.create()) {
+      String name = NodeName.of(projectId, zone, nodeName).toString();
+
+      StopNodeRequest request = StopNodeRequest.newBuilder().setName(name).build();
+      Node response = tpuClient.stopNodeAsync(request).get();
+
+      System.out.printf("TPU VM stopped: %s\n", response.getName());
+    }
+  }
+}
+//[END tpu_vm_stop]
+

tpu/src/test/java/tpu/TpuVmIT.java

@@ -16,6 +16,8 @@
 
 package tpu;
 
+import static com.google.cloud.tpu.v2.Node.State.READY;
+import static com.google.cloud.tpu.v2.Node.State.STOPPED;
 import static com.google.common.truth.Truth.assertThat;
 import static com.google.common.truth.Truth.assertWithMessage;
 import static org.junit.Assert.assertNotNull;
@@ -96,4 +98,23 @@ public void testGetTpuVm() throws IOException {
     assertNotNull(node);
     assertThat(node.getName()).isEqualTo(NODE_PATH_NAME);
   }
+
+
+  @Test
+  @Order(2)
+  public void testStopTpuVm() throws IOException, ExecutionException, InterruptedException {
+    StopTpuVm.stopTpuVm(PROJECT_ID, ZONE, NODE_NAME);
+    Node node = GetTpuVm.getTpuVm(PROJECT_ID, ZONE, NODE_NAME);
+
+    assertThat(node.getState()).isEqualTo(STOPPED);
+  }
+
+  @Test
+  @Order(3)
+  public void testStartTpuVm() throws IOException, ExecutionException, InterruptedException {
+    StartTpuVm.startTpuVm(PROJECT_ID, ZONE, NODE_NAME);
+    Node node = GetTpuVm.getTpuVm(PROJECT_ID, ZONE, NODE_NAME);
+
+    assertThat(node.getState()).isEqualTo(READY);
+  }
 }