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.sdk.schemas.io;
  
  import static org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Preconditions.checkArgument;
  
  import java.util.List;
  import java.util.Map;
  import org.apache.beam.sdk.annotations.Internal;
  import org.apache.beam.sdk.transforms.PTransform;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.PDone;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.base.Splitter;
  
  /** Helper to generate a DLQ transform to write PCollection<Failure> to an external system. */
  @Internal
  public final class GenericDlq {
    private GenericDlq() {}
  
    private static final Map<String, GenericDlqProvider> PROVIDERS =
        Providers.loadProviders(GenericDlqProvider.class);
  
    @SuppressWarnings("dereference.of.nullable")
    public static PTransform<PCollection<Failure>, PDone> getDlqTransform(String fullConfig) {
      List<String> strings = Splitter.on(":").limit(2).splitToList(fullConfig);
      checkArgument(
          strings.size() == 2, "Invalid config, must start with `identifier:`. %s", fullConfig);
      String key = strings.get(0);
      String config = strings.get(1).trim();
      GenericDlqProvider provider = PROVIDERS.get(key);
      checkArgument(
          provider != null, "Invalid config, no DLQ provider exists with identifier `%s`.", key);
      return provider.newDlqTransform(config);
    }
  }
  