docs(samples): add authorized view tutorial

samples/snippets/src/main/java/com/example/bigquery/AuthorizedViewTutorial.java

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+/*
+ * Copyright 2020 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 com.example.bigquery;
+
+import com.google.cloud.bigquery.Acl;
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.Dataset;
+import com.google.cloud.bigquery.DatasetInfo;
+import com.google.cloud.bigquery.QueryJobConfiguration;
+import com.google.cloud.bigquery.Table;
+import com.google.cloud.bigquery.TableId;
+import com.google.cloud.bigquery.TableInfo;
+import com.google.cloud.bigquery.ViewDefinition;
+import java.util.ArrayList;
+import java.util.List;
+
+// Sample of authorized view tutorial.
+public class AuthorizedViewTutorial {
+
+  public static void runAuthorizedViewTutorial() {
+    // TODO(developer): Replace these variables before running the sample.
+    String projectId = "MY_PROJECT_ID";
+    String sourceDatasetId = "MY_SOURCE_DATASET";
+    String sourceTableId = "MY_SOURCE_TABLE";
+    String sharedDatasetId = "SHARED_VIEWS";
+    String sharedViewId = "MY_VIEW";
+    authorizedViewTutorial(
+        projectId, sourceDatasetId, sourceTableId, sharedDatasetId, sharedViewId);
+  }
+
+  public static void authorizedViewTutorial(
+      String projectId,
+      String sourceDatasetId,
+      String sourceTableId,
+      String sharedDatasetId,
+      String sharedViewId) {
+    try {
+      // Initialize client that will be used to send requests. This client only needs to be created
+      // once, and can be reused for multiple requests.
+      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
+      // [START bigquery_authorized_view_tutorial]
+      // [START bigquery_avt_create_source_dataset]
+      // Create a source dataset to store your table.
+      Dataset sourceDataset = bigquery.create(DatasetInfo.of(sourceDatasetId));
+      // [END bigquery_avt_create_source_dataset]
+
+      // [START bigquery_avt_create_source_table]
+      // Populate a source table
+      String tableQuery =
+          "SELECT commit, author, committer, repo_name"
+              + " FROM `bigquery-public-data.github_repos.commits`"
+              + " LIMIT 1000";
+      QueryJobConfiguration queryConfig =
+          QueryJobConfiguration.newBuilder(tableQuery)
+              .setDestinationTable(TableId.of(sourceDatasetId, sourceTableId))
+              .build();
+      bigquery.query(queryConfig);
+      // [END bigquery_avt_create_source_table]
+
+      // [START bigquery_avt_create_shared_dataset]
+      // Create a separate dataset to store your view
+      Dataset sharedDataset = bigquery.create(DatasetInfo.of(sharedDatasetId));
+      // [END bigquery_avt_create_shared_dataset]
+
+      // [START bigquery_avt_create_view]
+      // Create the view in the new dataset
+      String viewQuery =
+          String.format(
+              "SELECT commit, author.name as author, committer.name as committer, repo_name FROM %s.%s.%s",
+              projectId, sourceDatasetId, sourceTableId);
+
+      ViewDefinition viewDefinition = ViewDefinition.of(viewQuery);
+
+      Table view =
+          bigquery.create(TableInfo.of(TableId.of(sharedDatasetId, sharedViewId), viewDefinition));
+      // [END bigquery_avt_create_view]
+
+      // [START bigquery_avt_shared_dataset_access]
+      // Assign access controls to the dataset containing the view
+      List<Acl> viewAcl = new ArrayList<>(sharedDataset.getAcl());
+      viewAcl.add(Acl.of(new Acl.Group("example-analyst-group@google.com"), Acl.Role.READER));
+      sharedDataset.toBuilder().setAcl(viewAcl).build().update();
+      // [END bigquery_avt_shared_dataset_access]
+
+      // [START bigquery_avt_source_dataset_access]
+      // Authorize the view to access the source dataset
+      List<Acl> srcAcl = new ArrayList<>(sourceDataset.getAcl());
+      srcAcl.add(Acl.of(new Acl.View(view.getTableId())));
+      sourceDataset.toBuilder().setAcl(srcAcl).build().update();
+      // [END bigquery_avt_source_dataset_access]
+      // [END bigquery_authorized_view_tutorial]
+      System.out.println("Authorized view tutorial successfully");
+    } catch (BigQueryException | InterruptedException e) {
+      System.out.println("Authorized view tutorial was not success. \n" + e.toString());
+    }
+  }
+}

samples/snippets/src/test/java/com/example/bigquery/AuthorizedViewTutorialIT.java

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+/*
+ * Copyright 2020 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 com.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+import static junit.framework.TestCase.assertNotNull;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.UUID;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+public class AuthorizedViewTutorialIT {
+
+  private String sourceDatasetId;
+  private String sourceTableId;
+  private String sharedDatasetId;
+  private String sharedViewId;
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  private static final String PROJECT_ID = requireEnvVar("GOOGLE_CLOUD_PROJECT");
+
+  private static String requireEnvVar(String varName) {
+    String value = System.getenv(varName);
+    assertNotNull(
+        "Environment variable " + varName + " is required to perform these tests.",
+        System.getenv(varName));
+    return value;
+  }
+
+  @BeforeClass
+  public static void checkRequirements() {
+    requireEnvVar("GOOGLE_CLOUD_PROJECT");
+  }
+
+  @Before
+  public void setUp() {
+    sourceDatasetId = "SOURCE_DATASET_TEST_" + UUID.randomUUID().toString().substring(0, 8);
+    sourceTableId = "SOURCE_TABLE_TEST_" + UUID.randomUUID().toString().substring(0, 8);
+    sharedDatasetId = "SHARED_DATASET_TEST_" + UUID.randomUUID().toString().substring(0, 8);
+    sharedViewId = "SHARED_VIEW_TEST_" + UUID.randomUUID().toString().substring(0, 8);
+
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    // Clean up
+    DeleteDataset.deleteDataset(PROJECT_ID, sourceDatasetId);
+    DeleteDataset.deleteDataset(PROJECT_ID, sharedDatasetId);
+    System.setOut(null);
+  }
+
+  @Test
+  public void testAuthorizedViewTutorial() {
+    AuthorizedViewTutorial.authorizedViewTutorial(
+        PROJECT_ID, sourceDatasetId, sourceTableId, sharedDatasetId, sharedViewId);
+    assertThat(bout.toString()).contains("Authorized view tutorial successfully");
+  }
+}