public static class BatchSpoutExecutor.EmptyCoordinator extends Object implements ITridentSpout.BatchCoordinator<Object>
| Constructor and Description |
|---|
EmptyCoordinator() |
| Modifier and Type | Method and Description |
|---|---|
void |
close()
Release any resources from this coordinator.
|
Object |
initializeTransaction(long txid,
Object prevMetadata,
Object currMetadata)
Create metadata for this particular transaction id which has never been emitted before.
|
boolean |
isReady(long txid)
hint to Storm if the spout is ready for the transaction id.
|
void |
success(long txid)
This attempt committed successfully, so all state for this commit and before can be safely cleaned up.
|
public Object initializeTransaction(long txid, Object prevMetadata, Object currMetadata)
ITridentSpout.BatchCoordinatorCreate metadata for this particular transaction id which has never been emitted before. The metadata should contain whatever is necessary to be able to replay the exact batch for the transaction at a later point.
The metadata is stored in Zookeeper.
Storm uses JSON encoding to store the metadata. Only simple types such as numbers, booleans, strings, lists, and maps should be used.
initializeTransaction in interface ITridentSpout.BatchCoordinator<Object>txid - The id of the transaction.prevMetadata - The metadata of the previous transactioncurrMetadata - The metadata for this transaction the last time it was initialized. null if this is the first attemptpublic void close()
ITridentSpout.BatchCoordinatorRelease any resources from this coordinator.
close in interface ITridentSpout.BatchCoordinator<Object>public void success(long txid)
ITridentSpout.BatchCoordinatorThis attempt committed successfully, so all state for this commit and before can be safely cleaned up.
success in interface ITridentSpout.BatchCoordinator<Object>txid - transaction id that completedpublic boolean isReady(long txid)
ITridentSpout.BatchCoordinatorhint to Storm if the spout is ready for the transaction id.
isReady in interface ITridentSpout.BatchCoordinator<Object>txid - the id of the transactionCopyright © 2021 The Apache Software Foundation. All rights reserved.