org.apache.flink.streaming.connectors.kafka.internals

类 KafkaTopicPartitionStateSentinel

java.lang.Object

org.apache.flink.streaming.connectors.kafka.internals.KafkaTopicPartitionStateSentinel

@Internal
public class KafkaTopicPartitionStateSentinel
extends Object

Magic values used to represent special offset states before partitions are actually read.

The values are all negative. Negative offsets are not used by Kafka (invalid), so we pick a number that is probably (hopefully) not used by Kafka as a magic number for anything else.

字段概要

字段

限定符和类型	字段和说明
static long	EARLIEST_OFFSET Magic number that defines the partition should start from the earliest offset.
static long	GROUP_OFFSET Magic number that defines the partition should start from its committed group offset in Kafka.
static long	LATEST_OFFSET Magic number that defines the partition should start from the latest offset.
static long	OFFSET_NOT_SET Magic number that defines an unset offset.

构造器概要

构造器

构造器和说明
KafkaTopicPartitionStateSentinel()

方法概要

限定符和类型	方法和说明
static boolean	isSentinel(long offset)

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

OFFSET_NOT_SET

public static final long OFFSET_NOT_SET

Magic number that defines an unset offset.

另请参阅:

常量字段值

EARLIEST_OFFSET

public static final long EARLIEST_OFFSET

Magic number that defines the partition should start from the earliest offset.

This is used as a placeholder so that the actual earliest offset can be evaluated lazily when the partition will actually start to be read by the consumer.

另请参阅:

常量字段值

LATEST_OFFSET

public static final long LATEST_OFFSET

Magic number that defines the partition should start from the latest offset.

This is used as a placeholder so that the actual latest offset can be evaluated lazily when the partition will actually start to be read by the consumer.

另请参阅:

常量字段值

GROUP_OFFSET

public static final long GROUP_OFFSET

Magic number that defines the partition should start from its committed group offset in Kafka.

This is used as a placeholder so that the actual committed group offset can be evaluated lazily when the partition will actually start to be read by the consumer.

另请参阅:

常量字段值

构造器详细资料

KafkaTopicPartitionStateSentinel

public KafkaTopicPartitionStateSentinel()

方法详细资料

isSentinel

public static boolean isSentinel(long offset)