kafka InternalQueryResultUtil 源码
kafka InternalQueryResultUtil 代码
文件路径：/streams/src/main/java/org/apache/kafka/streams/query/internals/InternalQueryResultUtil.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.query.internals;
import org.apache.kafka.common.annotation.InterfaceStability.Unstable;
import org.apache.kafka.streams.query.QueryResult;
/**
* Internal utility class to support operations the Kafka Streams framework needs to
* perform on {@link QueryResult}s.
*/
@Unstable
public final class InternalQueryResultUtil {
// uninstantiable utility class
public InternalQueryResultUtil() {}
/**
* Creates a new `QueryResult` preserving the execution info
* and position of the provided result.
*/
public static <R> QueryResult<R> copyAndSubstituteDeserializedResult(
final QueryResult<?> rawResult,
final R deserializedResult) {
if (rawResult.isFailure()) {
throw new IllegalArgumentException(
"Callers must avoid calling this method on a failed result."
);
} else {
return new SucceededQueryResult<>(
deserializedResult,
rawResult.getExecutionInfo(),
rawResult.getPosition()
);
}
}
}
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