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.streams.processor.api;
  
  import org.apache.kafka.streams.processor.ConnectedStoreProvider;
  
  import java.util.function.Supplier;
  
  /**
   * A processor supplier that can create one or more {@link FixedKeyProcessor} instances.
   * <p>
   * The supplier should always generate a new instance each time {@link FixedKeyProcessorSupplier#get()} gets called. Creating
   * a single {@link FixedKeyProcessor} object and returning the same object reference in {@link FixedKeyProcessorSupplier#get()} would be
   * a violation of the supplier pattern and leads to runtime exceptions.
   *
   * @param <KIn> the type of input keys
   * @param <VIn> the type of input values
   * @param <VOut> the type of output values
   */
  @FunctionalInterface
  public interface FixedKeyProcessorSupplier<KIn, VIn, VOut>
      extends ConnectedStoreProvider, Supplier<FixedKeyProcessor<KIn, VIn, VOut>> {
  
      /**
       * Return a newly constructed {@link FixedKeyProcessor} instance.
       * The supplier should always generate a new instance each time {@code FixedKeyProcessorSupplier#get()} gets called.
       * <p>
       * Creating a single {@link FixedKeyProcessor} object and returning the same object reference in {@code FixedKeyProcessorSupplier#get()}
       * is a violation of the supplier pattern and leads to runtime exceptions.
       *
       * @return a new {@link FixedKeyProcessor} instance
       */
      FixedKeyProcessor<KIn, VIn, VOut> get();
  }
  