Add list_tasks sample for Batch

Author: Shnatsel

batch/list/list_tasks.js

@@ -0,0 +1,74 @@
+// Copyright 2022 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
+//
+//     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.
+
+'use strict';
+
+/**
+ * Get a list of all jobs defined in given region.
+ *
+ * @param {string} projectId - ID or number of the Google Cloud project you want to use.
+ * @param {string} region - The Google Cloud region to use, e.g. 'us-central1'
+ * @param {string} jobName - ID used to uniquely identify the Job within this project and region.
+ *  This field should contain at most 63 characters.
+ *  Only alphanumeric characters or '-' are accepted.
+ *  The '-' character cannot be the first or the last one.
+ * @param {string} groupName - name of the group of tasks. Usually it's `group0`.
+ */
+function main(projectId, region, jobName, groupName) {
+  // [START batch_list_tasks]
+  /**
+   * TODO(developer): Uncomment and replace these variables before running the sample.
+   */
+  // const projectId = 'YOUR_PROJECT_ID';
+  /**
+   * The region that hosts the job.
+   */
+  // const region = 'us-central-1';
+  /**
+   * The name of the job which tasks you want to list.
+   */
+  // const jobName = 'YOUR_JOB_NAME';
+  /**
+   * The name of the group of tasks. Usually it's `group0`.
+   */
+  // const groupName = 'group0';
+
+  // Imports the Batch library
+  const batchLib = require('@google-cloud/batch');
+
+  // Instantiates a client
+  const batchClient = new batchLib.v1.BatchServiceClient();
+
+  async function callListTasks() {
+    // Construct request
+    const request = {
+      parent: `projects/${projectId}/locations/${region}/jobs/${jobName}/taskGroups/${groupName}`,
+    };
+
+    // Run request
+    const iterable = await batchClient.listTasksAsync(request);
+    for await (const response of iterable) {
+      console.log(response);
+    }
+  }
+
+  callListTasks();
+  // [END batch_list_tasks]
+}
+
+process.on('unhandledRejection', err => {
+  console.error(err.message);
+  process.exitCode = 1;
+});
+main(...process.argv.slice(2));