content: /*
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you 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 org.apache.beam.it.gcp.datastore;
  
  import java.time.Instant;
  import java.time.ZoneId;
  import java.time.format.DateTimeFormatter;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.CaseFormat;
  
  /** Utilities to make working with Datastore easier. */
  final class DatastoreUtils {
    private DatastoreUtils() {}
  
    /**
     * Creates a topic name.
     *
     * <p>If there are uppercase characters in {@code prefix}, then this will convert them into a dash
     * followed by the lowercase equivalent of that letter.
     *
     * <p>The topic name will normally be unique, but this is not guaranteed if multiple topics with
     * the same prefix are created in a short period of time.
     *
     * @param prefix a prefix for the topic
     * @return the prefix plus some way of identifying it separate from other topics with the same
     *     prefix
     */
    static String createTestId(String prefix) {
      String convertedPrefix =
          CaseFormat.UPPER_CAMEL.converterTo(CaseFormat.LOWER_HYPHEN).convert(prefix);
      String formattedTimestamp =
          DateTimeFormatter.ofPattern("yyyyMMddHHmmssSSS")
              .withZone(ZoneId.of("UTC"))
              .format(Instant.now());
      return String.format("%s-%s", convertedPrefix, formattedTimestamp);
    }
  }
  