kafka LogTruncationException 源码
kafka LogTruncationException 代码
文件路径：/clients/src/main/java/org/apache/kafka/clients/consumer/LogTruncationException.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.clients.consumer;
import org.apache.kafka.common.TopicPartition;
import java.util.Collections;
import java.util.Map;
/**
* In the event of an unclean leader election, the log will be truncated,
* previously committed data will be lost, and new data will be written
* over these offsets. When this happens, the consumer will detect the
* truncation and raise this exception (if no automatic reset policy
* has been defined) with the first offset known to diverge from what the
* consumer previously read.
*/
public class LogTruncationException extends OffsetOutOfRangeException {
private final Map<TopicPartition, OffsetAndMetadata> divergentOffsets;
public LogTruncationException(String message,
Map<TopicPartition, Long> fetchOffsets,
Map<TopicPartition, OffsetAndMetadata> divergentOffsets) {
super(message, fetchOffsets);
this.divergentOffsets = Collections.unmodifiableMap(divergentOffsets);
}
/**
* Get the divergent offsets for the partitions which were truncated. For each
* partition, this is the first offset which is known to diverge from what the
* consumer read.
*
* Note that there is no guarantee that this offset will be known. It is necessary
* to use {@link #partitions()} to see the set of partitions that were truncated
* and then check for the presence of a divergent offset in this map.
*/
public Map<TopicPartition, OffsetAndMetadata> divergentOffsets() {
return divergentOffsets;
}
}
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