clintropolis commented on code in PR #19535: URL: https://github.com/apache/druid/pull/19535#discussion_r3415430556
########## processing/src/main/java/org/apache/druid/segment/PartialBundleAcquirer.java: ########## @@ -0,0 +1,48 @@ +/* + * 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.druid.segment; + +import com.google.common.util.concurrent.ListeningExecutorService; + +import java.io.Closeable; + +/** + * Context object that bundles together pieces of cache-layer machinery needed to do on-demand partial segment loading: + * <ol> + * <li>A hook for acquiring a hold on the cache-layer bundle.</li> + * <li>The executor on which partial downloads should run.</li> + * </ol> + */ +public interface PartialBundleAcquirer +{ + /** + * Acquire a hold on the cache-layer bundle with the given name. The returned {@link Closeable} releases the hold + * when closed (the bundle itself stays in the cache for re-use by subsequent acquires). + * <p> + * Implementations should be safe to call concurrently for different bundle names. Review Comment: clarified -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
