All Known Implementing Classes:

InMemoryPendingAckStore, MLPendingAckStore
```
public interface PendingAckStore
```
To store transaction pending ack.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.util.concurrent.CompletableFuture<java.lang.Void>`	`appendAbortMark(org.apache.pulsar.client.api.transaction.TxnID txnID, org.apache.pulsar.common.api.proto.CommandAck.AckType ackType)`	Append the pending ack abort mark to the ack persistent store.
`java.util.concurrent.CompletableFuture<java.lang.Void>`	`appendCommitMark(org.apache.pulsar.client.api.transaction.TxnID txnID, org.apache.pulsar.common.api.proto.CommandAck.AckType ackType)`	Append the pending ack commit mark to the ack persistent store.
`java.util.concurrent.CompletableFuture<java.lang.Void>`	`appendCumulativeAck(org.apache.pulsar.client.api.transaction.TxnID txnID, org.apache.bookkeeper.mledger.impl.PositionImpl position)`	Append the cumulative pending ack operation to the ack persistent store.
`java.util.concurrent.CompletableFuture<java.lang.Void>`	`appendIndividualAck(org.apache.pulsar.client.api.transaction.TxnID txnID, java.util.List<org.apache.commons.lang3.tuple.MutablePair<org.apache.bookkeeper.mledger.impl.PositionImpl,java.lang.Integer>> positions)`	Append the individual pending ack operation to the ack persistent store.
`java.util.concurrent.CompletableFuture<java.lang.Void>`	`closeAsync()`	Close the transaction pending ack store.
`void`	`replayAsync(PendingAckHandleImpl pendingAckHandle, java.util.concurrent.ExecutorService executorService)`	Replay pending ack to recover the pending ack subscription pending ack state.

Method Detail

replayAsync
```
void replayAsync(PendingAckHandleImpl pendingAckHandle,
                 java.util.concurrent.ExecutorService executorService)
```
Replay pending ack to recover the pending ack subscription pending ack state.

Parameters:

pendingAckHandle - the handle of pending ack

executorService - the replay executor service

closeAsync
```
java.util.concurrent.CompletableFuture<java.lang.Void> closeAsync()
```
Close the transaction pending ack store.

Returns:

a future represents the result of this operation

appendIndividualAck

java.util.concurrent.CompletableFuture<java.lang.Void> appendIndividualAck(org.apache.pulsar.client.api.transaction.TxnID txnID,
                                                                           java.util.List<org.apache.commons.lang3.tuple.MutablePair<org.apache.bookkeeper.mledger.impl.PositionImpl,java.lang.Integer>> positions)

Append the individual pending ack operation to the ack persistent store.

Parameters:: txnID - TxnID transaction id.; positions - List the list of position and batch size.
Returns:: a future represents the result of this operation

appendCumulativeAck

java.util.concurrent.CompletableFuture<java.lang.Void> appendCumulativeAck(org.apache.pulsar.client.api.transaction.TxnID txnID,
                                                                           org.apache.bookkeeper.mledger.impl.PositionImpl position)

Append the cumulative pending ack operation to the ack persistent store.

Parameters:: txnID - TxnID transaction id.; position - PositionImpl the pending ack position.
Returns:: a future represents the result of this operation

appendCommitMark

java.util.concurrent.CompletableFuture<java.lang.Void> appendCommitMark(org.apache.pulsar.client.api.transaction.TxnID txnID,
                                                                        org.apache.pulsar.common.api.proto.CommandAck.AckType ackType)

Append the pending ack commit mark to the ack persistent store.

Parameters:: txnID - TxnID the transaction id for add commit mark.; ackType - CommandAck.AckType the ack type of the commit.
Returns:: a future represents the result of this operation

appendAbortMark

java.util.concurrent.CompletableFuture<java.lang.Void> appendAbortMark(org.apache.pulsar.client.api.transaction.TxnID txnID,
                                                                       org.apache.pulsar.common.api.proto.CommandAck.AckType ackType)

Append the pending ack abort mark to the ack persistent store.

Parameters:: txnID - Position the txnID; ackType - CommandAck.AckType the ack type of the abort.
Returns:: a future represents the result of this operation

Interface PendingAckStore