Implemented tpu_vm_list sample, created test

Author: TetyanaYahodska

tpu/src/main/java/tpu/ListTpuVms.java

@@ -0,0 +1,52 @@
+/*
+ * 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_list]
+import com.google.cloud.tpu.v2.ListNodesRequest;
+import com.google.cloud.tpu.v2.TpuClient;
+import com.google.cloud.tpu.v2.TpuClient.ListNodesPagedResponse;
+import java.io.IOException;
+
+public class ListTpuVms {
+
+  public static void main(String[] args) throws IOException {
+    // 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";
+
+    listTpuVms(projectId, zone);
+  }
+
+  // Lists TPU VMs in the specified zone.
+  public static ListNodesPagedResponse listTpuVms(String projectId, String zone)
+      throws IOException {
+    // 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 parent = String.format("projects/%s/locations/%s", projectId, zone);
+
+      ListNodesRequest request = ListNodesRequest.newBuilder().setParent(parent).build();
+      return tpuClient.listNodes(request);
+    }
+  }
+}
+//[END tpu_vm_list]

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

@@ -22,10 +22,12 @@
 
 import com.google.api.gax.rpc.NotFoundException;
 import com.google.cloud.tpu.v2.Node;
+import com.google.cloud.tpu.v2.TpuClient;
 import java.io.IOException;
 import java.util.UUID;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
+import org.junit.Assert;
 import org.junit.jupiter.api.AfterAll;
 import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.BeforeAll;
@@ -96,4 +98,15 @@ public void testGetTpuVm() throws IOException {
     assertNotNull(node);
     assertThat(node.getName()).isEqualTo(NODE_PATH_NAME);
   }
+
+  @Test
+  @Order(2)
+  public void testListTpuVm() throws IOException {
+    TpuClient.ListNodesPagedResponse nodesList = ListTpuVms.listTpuVms(PROJECT_ID, ZONE);
+
+    assertNotNull(nodesList);
+    for (Node node : nodesList.iterateAll()) {
+      Assert.assertTrue(node.getName().contains("test-tpu"));
+    }
+  }
 }