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.kstream.internals.graph;
  
  import org.apache.kafka.streams.processor.internals.InternalTopologyBuilder;
  
  import java.time.Duration;
  import java.util.Arrays;
  
  /**
   * Represents a join between a KStream and a KTable or GlobalKTable
   */
  
  public class StreamTableJoinNode<K, V, VOut> extends GraphNode {
  
      private final String[] storeNames;
      private final ProcessorParameters<K, V, K, VOut> processorParameters;
      private final String otherJoinSideNodeName;
      private final Duration gracePeriod;
  
      public StreamTableJoinNode(final String nodeName,
                                 final ProcessorParameters<K, V, K, VOut> processorParameters,
                                 final String[] storeNames,
                                 final String otherJoinSideNodeName,
                                 final Duration gracePeriod) {
          super(nodeName);
  
          // in the case of Stream-Table join the state stores associated with the KTable
          this.storeNames = storeNames;
          this.processorParameters = processorParameters;
          this.otherJoinSideNodeName = otherJoinSideNodeName;
          this.gracePeriod = gracePeriod;
      }
  
      @Override
      public String toString() {
          return "StreamTableJoinNode{" +
                 "storeNames=" + Arrays.toString(storeNames) +
                 ", processorParameters=" + processorParameters +
                 ", otherJoinSideNodeName='" + otherJoinSideNodeName + '\'' +
                 "} " + super.toString();
      }
  
      @Override
      public void writeToTopology(final InternalTopologyBuilder topologyBuilder) {
          final String processorName = processorParameters.processorName();
  
          // Stream - Table join (Global or KTable)
          processorParameters.addProcessorTo(topologyBuilder, parentNodeNames());
  
          // Steam - KTable join only
          if (otherJoinSideNodeName != null) {
              topologyBuilder.connectProcessorAndStateStores(processorName, storeNames);
              if (gracePeriod != null) {
                  for (final String storeName : storeNames) {
                      if (!topologyBuilder.isStoreVersioned(storeName)) {
                          throw new IllegalArgumentException("KTable must be versioned to use a grace period in a stream table join.");
                      }
                      if (gracePeriod.toMillis() > topologyBuilder.historyRetention(storeName)) {
                          throw new IllegalArgumentException("History retention must be at least grace period.");
                      }
                  }
              }
          }
  
      }
  }
  