patrickstuedi commented on a change in pull request #11557: URL: https://github.com/apache/kafka/pull/11557#discussion_r761770579
########## File path: streams/src/main/java/org/apache/kafka/streams/state/internals/StoreQueryUtils.java ########## @@ -0,0 +1,65 @@ +/* + * 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.internals; + +import org.apache.kafka.streams.processor.StateStore; +import org.apache.kafka.streams.processor.StateStoreContext; +import org.apache.kafka.streams.processor.api.RecordMetadata; +import org.apache.kafka.streams.query.Position; +import org.apache.kafka.streams.query.PositionBound; +import org.apache.kafka.streams.query.Query; +import org.apache.kafka.streams.query.QueryResult; + +public final class StoreQueryUtils { + + // make this class uninstantiable + private StoreQueryUtils() { + } + + @SuppressWarnings("unchecked") + public static <R> QueryResult<R> handleBasicQueries( + final Query<R> query, + final PositionBound positionBound, + final boolean collectExecutionInfo, + final StateStore store) { + + final QueryResult<R> result; + final long start = collectExecutionInfo ? System.nanoTime() : -1L; + // TODO: position tracking + if (query instanceof PingQuery) { + result = (QueryResult<R>) QueryResult.forResult(true); Review comment: How do we ensure type R matches the type of template type of the store? -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org
