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.kafka.coordinator.transaction;
  
  
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.server.common.NodeToControllerChannelManager;
  
  import java.util.function.Supplier;
  
  /**
   * ProducerIdManager is the part of the transaction coordinator that provides ProducerIds in a unique way
   * such that the same producerId will not be assigned twice across multiple transaction coordinators.
   * <p>
   * ProducerIds are managed by the controller. When requesting a new range of IDs, we are guaranteed to receive
   * a unique block.
   */
  public interface ProducerIdManager {
  
      long generateProducerId() throws Exception;
  
      static ProducerIdManager rpc(int brokerId,
                                   Time time,
                                   Supplier<Long> brokerEpochSupplier,
                                   NodeToControllerChannelManager controllerChannel) {
          return new RPCProducerIdManager(brokerId, time, brokerEpochSupplier, controllerChannel);
      }
  }
  