dongjoon-hyun commented on a change in pull request #27380: [SPARK-30669][SS] Introduce AdmissionControl APIs for StructuredStreaming URL: https://github.com/apache/spark/pull/27380#discussion_r373271899
########## File path: sql/catalyst/src/main/java/org/apache/spark/sql/connector/read/streaming/ReadAllAvailable.java ########## @@ -0,0 +1,41 @@ +/* + * 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.spark.sql.connector.read.streaming; + +import org.apache.spark.annotation.Evolving; + +/** + * Represents a {@link ReadLimit} where the {@link MicroBatchStream} must scan all the data + * available at the streaming source. This is meant to be a hard specification as being able + * to return all available data is necessary for Trigger.Once() to work correctly. + * If a source is unable to scan all available data, then it must throw an error. + * + * @see SupportsAdmissionControl#latestOffset(Offset, ReadLimit) + * @since 3.0.0 + */ +@Evolving +public final class ReadAllAvailable implements ReadLimit { + static final ReadAllAvailable SINGLETON = new ReadAllAvailable(); Review comment: I believe that we can change that,too. I'll make a follow-up for that. ---------------------------------------------------------------- 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. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
