kafka StoreBuilder 源码
kafka StoreBuilder 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/state/StoreBuilder.java
/*
* 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.state;
import org.apache.kafka.streams.processor.StateStore;
import java.util.Map;
/**
* Build a {@link StateStore} wrapped with optional caching and logging.
* @param <T> the type of store to build
*/
public interface StoreBuilder<T extends StateStore> {
/**
* Enable caching on the store.
* @return this
*/
StoreBuilder<T> withCachingEnabled();
/**
* Disable caching on the store.
* @return this
*/
StoreBuilder<T> withCachingDisabled();
/**
* Maintain a changelog for any changes made to the store.
* Use the provided config to set the config of the changelog topic.
* @param config config applied to the changelog topic
* @return this
*/
StoreBuilder<T> withLoggingEnabled(final Map<String, String> config);
/**
* Disable the changelog for store built by this {@link StoreBuilder}.
* This will turn off fault-tolerance for your store.
* By default the changelog is enabled.
* @return this
*/
StoreBuilder<T> withLoggingDisabled();
/**
* Build the store as defined by the builder.
*
* @return the built {@link StateStore}
*/
T build();
/**
* Returns a Map containing any log configs that will be used when creating the changelog for the {@link StateStore}.
* <p>
* Note: any unrecognized configs will be ignored by the Kafka brokers.
*
* @return Map containing any log configs to be used when creating the changelog for the {@link StateStore}
* If {@code loggingEnabled} returns false, this function will always return an empty map
*/
Map<String, String> logConfig();
/**
* @return {@code true} if the {@link StateStore} should have logging enabled
*/
boolean loggingEnabled();
/**
* Return the name of this state store builder.
* This must be a valid Kafka topic name; valid characters are ASCII alphanumerics, '.', '_' and '-'.
*
* @return the name of this state store builder
*/
String name();
}
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