Package io.smallrye.reactive.messaging.kafka.commit

Class DefaultCheckpointMetadata<T>

java.lang.Object

io.smallrye.reactive.messaging.kafka.commit.DefaultCheckpointMetadata<T>

Type Parameters:

T - type of the processing state

All Implemented Interfaces:

CheckpointMetadata<T>

public class DefaultCheckpointMetadata<T>
extends Object
implements CheckpointMetadata<T>

Default implementation of CheckpointMetadata

Constructor Summary

Constructors

Constructor	Description
DefaultCheckpointMetadata(org.apache.kafka.common.TopicPartition topicPartition, long recordOffset, io.smallrye.reactive.messaging.kafka.commit.KafkaCheckpointCommit.CheckpointState<T> checkpointState)

Method Summary

Modifier and Type	Method	Description
static <S> DefaultCheckpointMetadata<S>	fromMessage(org.eclipse.microprofile.reactive.messaging.Message<?> message)
ProcessingState<T>	getCurrent()
ProcessingState<T>	getNext()
long	getRecordOffset()
org.apache.kafka.common.TopicPartition	getTopicPartition()
boolean	isPersistOnAck()
T	setNext(T state)	Set the next processing state to the given state, associated with the current record offset + 1.
T	setNext(T state, boolean persistOnAck)	Set the next processing state to the given state, associated with the current record offset + 1.
T	transform(Supplier<T> initialStateSupplier, Function<T,T> transformation)	See CheckpointMetadata.transform(Supplier, Function, boolean) The state will not be persisted on message acknowledgement.
T	transform(Supplier<T> initialStateSupplier, Function<T,T> transformation, boolean persistOnAck)	Apply the transformation to the current state, if a previous state doesn't exist, start the transformation from the supplied initial state.
T	transform(T initialState, Function<T,T> transformation)	See CheckpointMetadata.transform(Supplier, Function, boolean) The state will not be persisted on message acknowledgement.
T	transform(T initialState, Function<T,T> transformation, boolean persistOnAck)	See CheckpointMetadata.transform(Supplier, Function, boolean)

Methods inherited from class java.lang.Object

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

Constructor Detail

DefaultCheckpointMetadata

public DefaultCheckpointMetadata(org.apache.kafka.common.TopicPartition topicPartition,
                                 long recordOffset,
                                 io.smallrye.reactive.messaging.kafka.commit.KafkaCheckpointCommit.CheckpointState<T> checkpointState)

Method Detail

fromMessage

public static <S> DefaultCheckpointMetadata<S> fromMessage(org.eclipse.microprofile.reactive.messaging.Message<?> message)

getTopicPartition

public org.apache.kafka.common.TopicPartition getTopicPartition()

Specified by:

getTopicPartition in interface CheckpointMetadata<T>

Returns:

the topic-partition of this record

getRecordOffset

public long getRecordOffset()

Specified by:

getRecordOffset in interface CheckpointMetadata<T>

Returns:

the offset of this record

isPersistOnAck

public boolean isPersistOnAck()

Specified by:

isPersistOnAck in interface CheckpointMetadata<T>

Returns:

true if the processing state will be persisted on message acknowledgement

getCurrent

public ProcessingState<T> getCurrent()

Specified by:

getCurrent in interface CheckpointMetadata<T>

Returns:

the current processing state

getNext

public ProcessingState<T> getNext()

Specified by:

getNext in interface CheckpointMetadata<T>

Returns:

the next processing state set during this processing

setNext

public T setNext(T state,
                 boolean persistOnAck)

Description copied from interface: CheckpointMetadata

Set the next processing state to the given state, associated with the current record offset + 1.

Specified by:

setNext in interface CheckpointMetadata<T>

Parameters:

state - the next state

persistOnAck - If true then the state will be persisted on message acknowledgement

Returns:

the previous state

setNext

public T setNext(T state)

Description copied from interface: CheckpointMetadata

Set the next processing state to the given state, associated with the current record offset + 1. The state will not be persisted on message acknowledgement.

Specified by:

setNext in interface CheckpointMetadata<T>

Parameters:

state - the next state

Returns:

the previous state

transform

public T transform(Supplier<T> initialStateSupplier,
                   Function<T,T> transformation,
                   boolean persistOnAck)

Description copied from interface: CheckpointMetadata

Apply the transformation to the current state, if a previous state doesn't exist, start the transformation from the supplied initial state. The state will be associated with the current record offset + 1.

Specified by:

transform in interface CheckpointMetadata<T>

Parameters:

initialStateSupplier - if no previous state does exist, start the transformation from this state.

transformation - the transformation function

persistOnAck - If true then the state will be persisted on message acknowledgement

Returns:

the previous state

transform

public T transform(T initialState,
                   Function<T,T> transformation,
                   boolean persistOnAck)

Description copied from interface: CheckpointMetadata

See CheckpointMetadata.transform(Supplier, Function, boolean)

Specified by:

transform in interface CheckpointMetadata<T>

Parameters:

initialState - if no previous state does exist, start the transformation from this state.

transformation - the transformation function

persistOnAck - If true then the state will be persisted on message acknowledgement

Returns:

the previous state

transform

public T transform(Supplier<T> initialStateSupplier,
                   Function<T,T> transformation)

Description copied from interface: CheckpointMetadata

See CheckpointMetadata.transform(Supplier, Function, boolean) The state will not be persisted on message acknowledgement.

Specified by:

transform in interface CheckpointMetadata<T>

Parameters:

initialStateSupplier - if no previous state does exist, start the transformation from this state.

transformation - the transformation function

Returns:

the previous state

transform

public T transform(T initialState,
                   Function<T,T> transformation)

Description copied from interface: CheckpointMetadata

See CheckpointMetadata.transform(Supplier, Function, boolean) The state will not be persisted on message acknowledgement.

Specified by:

transform in interface CheckpointMetadata<T>

Parameters:

initialState - if no previous state does exist, start the transformation from this state.

transformation - the transformation function

Returns:

the previous state