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0001 /* 0002 * Licensed to the Apache Software Foundation (ASF) under one or more 0003 * contributor license agreements. See the NOTICE file distributed with 0004 * this work for additional information regarding copyright ownership. 0005 * The ASF licenses this file to You under the Apache License, Version 2.0 0006 * (the "License"); you may not use this file except in compliance with 0007 * the License. You may obtain a copy of the License at 0008 * 0009 * http://www.apache.org/licenses/LICENSE-2.0 0010 * 0011 * Unless required by applicable law or agreed to in writing, software 0012 * distributed under the License is distributed on an "AS IS" BASIS, 0013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 0014 * See the License for the specific language governing permissions and 0015 * limitations under the License. 0016 */ 0017 0018 package org.apache.spark.sql.connector.read.streaming; 0019 0020 import org.apache.spark.annotation.Evolving; 0021 0022 /** 0023 * Represents a {@link ReadLimit} where the {@link MicroBatchStream} must scan all the data 0024 * available at the streaming source. This is meant to be a hard specification as being able 0025 * to return all available data is necessary for Trigger.Once() to work correctly. 0026 * If a source is unable to scan all available data, then it must throw an error. 0027 * 0028 * @see SupportsAdmissionControl#latestOffset(Offset, ReadLimit) 0029 * @since 3.0.0 0030 */ 0031 @Evolving 0032 public final class ReadAllAvailable implements ReadLimit { 0033 static final ReadAllAvailable INSTANCE = new ReadAllAvailable(); 0034 0035 private ReadAllAvailable() {} 0036 0037 @Override 0038 public String toString() { 0039 return "All Available"; 0040 } 0041 }
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