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/*
 * 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.internals;

import java.util.Map;
import java.util.Set;
import org.apache.kafka.streams.StreamsConfig;
import org.apache.kafka.streams.TopologyConfig;
import org.apache.kafka.streams.processor.StateStore;

/**
 * What! Another mechanism for obtaining a {@link StateStore}? This isn't just
 * an abuse of Java-isms... there's good reason for it. Here's how they are
 * interconnected:
 *
 * 
    *
  • {@link org.apache.kafka.streams.state.StoreBuilder} is the innermost * layer to provide state stores and is used directly by the PAPI.
  • * *
  • {@link org.apache.kafka.streams.state.StoreSupplier} is used by the * DSL to provide preconfigured state stores as well as type-safe stores * (e.g. {@link org.apache.kafka.streams.state.KeyValueBytesStoreSupplier}.
  • * *
  • {@link StoreFactory} (this class) is internal and not exposed to * the users. It allows the above store specifications to be wrapped in * an internal interface that can then be configured after the * creation of the Topology but before the stores themselves are created. * This allows Kafka Streams to respect configurations such as * {@link StreamsConfig#DEFAULT_DSL_STORE_CONFIG} even if it isn't passed * to {@link org.apache.kafka.streams.StreamsBuilder#StreamsBuilder(TopologyConfig)}
  • *
*/ public interface StoreFactory { default void configure(final StreamsConfig config) { // do nothing } StateStore build(); long retentionPeriod(); long historyRetention(); Set connectedProcessorNames(); boolean loggingEnabled(); String name(); boolean isWindowStore(); boolean isVersionedStore(); Map logConfig(); StoreFactory withCachingDisabled(); StoreFactory withLoggingDisabled(); boolean isCompatibleWith(StoreFactory storeFactory); }




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