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samples: Bit Reversed Sequence support (#2559)
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samples/snippets/src/main/java/com/example/spanner/AlterSequenceSample.java
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| /* | ||
| * Copyright 2023 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.spanner; | ||
|
|
||
| // [START spanner_alter_sequence] | ||
| import com.google.cloud.spanner.DatabaseAdminClient; | ||
| import com.google.cloud.spanner.DatabaseClient; | ||
| import com.google.cloud.spanner.DatabaseId; | ||
| import com.google.cloud.spanner.ResultSet; | ||
| import com.google.cloud.spanner.Spanner; | ||
| import com.google.cloud.spanner.SpannerExceptionFactory; | ||
| import com.google.cloud.spanner.SpannerOptions; | ||
| import com.google.cloud.spanner.Statement; | ||
| import com.google.common.collect.ImmutableList; | ||
| import java.util.Objects; | ||
| import java.util.concurrent.ExecutionException; | ||
| import java.util.concurrent.TimeUnit; | ||
| import java.util.concurrent.TimeoutException; | ||
|
|
||
| public class AlterSequenceSample { | ||
| static void alterSequence() { | ||
| // TODO(developer): Replace these variables before running the sample. | ||
| final String projectId = "my-project"; | ||
| final String instanceId = "my-instance"; | ||
| final String databaseId = "my-database"; | ||
| alterSequence(projectId, instanceId, databaseId); | ||
| } | ||
|
|
||
| static void alterSequence(String projectId, String instanceId, String databaseId) { | ||
| try (Spanner spanner = | ||
| SpannerOptions.newBuilder().setProjectId(projectId).build().getService()) { | ||
| final DatabaseAdminClient dbAdminClient = spanner.getDatabaseAdminClient(); | ||
|
|
||
| dbAdminClient | ||
| .updateDatabaseDdl( | ||
| instanceId, | ||
| databaseId, | ||
| ImmutableList.of( | ||
| "ALTER SEQUENCE Seq SET OPTIONS " | ||
| + "(skip_range_min = 1000, skip_range_max = 5000000)"), | ||
| null) | ||
| .get(5, TimeUnit.MINUTES); | ||
|
|
||
| System.out.println( | ||
| "Altered Seq sequence to skip an inclusive range between 1000 and 5000000"); | ||
|
|
||
| final DatabaseClient dbClient = | ||
| spanner.getDatabaseClient(DatabaseId.of(projectId, instanceId, databaseId)); | ||
|
|
||
| Long insertCount = | ||
| dbClient | ||
| .readWriteTransaction() | ||
| .run( | ||
| transaction -> { | ||
| try (ResultSet rs = | ||
| transaction.executeQuery( | ||
| Statement.of( | ||
| "INSERT INTO Customers (CustomerName) VALUES " | ||
| + "('Lea'), ('Catalina'), ('Smith') " | ||
| + "THEN RETURN CustomerId"))) { | ||
| while (rs.next()) { | ||
| System.out.printf( | ||
| "Inserted customer record with CustomerId: %d\n", rs.getLong(0)); | ||
| } | ||
| return Objects.requireNonNull(rs.getStats()).getRowCountExact(); | ||
| } | ||
| }); | ||
| System.out.printf("Number of customer records inserted is: %d\n", insertCount); | ||
| } catch (ExecutionException e) { | ||
| // If the operation failed during execution, expose the cause. | ||
| throw SpannerExceptionFactory.asSpannerException(e.getCause()); | ||
| } catch (InterruptedException e) { | ||
| // Throw when a thread is waiting, sleeping, or otherwise occupied, | ||
| // and the thread is interrupted, either before or during the activity. | ||
| throw SpannerExceptionFactory.propagateInterrupt(e); | ||
| } catch (TimeoutException e) { | ||
| // If the operation timed out propagate the timeout | ||
| throw SpannerExceptionFactory.propagateTimeout(e); | ||
| } | ||
| } | ||
| } | ||
| // [END spanner_alter_sequence] |
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