Package org.apache.storm.trident.spout
Class OpaquePartitionedTridentSpoutExecutor.Coordinator
java.lang.Object
org.apache.storm.trident.spout.OpaquePartitionedTridentSpoutExecutor.Coordinator
- All Implemented Interfaces:
ITridentSpout.BatchCoordinator<Object>
- Enclosing class:
- OpaquePartitionedTridentSpoutExecutor
public class OpaquePartitionedTridentSpoutExecutor.Coordinator
extends Object
implements ITridentSpout.BatchCoordinator<Object>
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoidclose()Release any resources from this coordinator.initializeTransaction(long txid, Object prevMetadata, Object currMetadata) Create metadata for this particular transaction id which has never been emitted before.booleanisReady(long txid) hint to Storm if the spout is ready for the transaction id.voidsuccess(long txid) This attempt committed successfully, so all state for this commit and before can be safely cleaned up.
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Constructor Details
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Coordinator
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Method Details
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initializeTransaction
Description copied from interface: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.
- Specified by:
initializeTransactionin interfaceITridentSpout.BatchCoordinator<Object>- Parameters:
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 attempt- Returns:
- the metadata for this new transaction
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close
public void close()Description copied from interface:ITridentSpout.BatchCoordinatorRelease any resources from this coordinator.- Specified by:
closein interfaceITridentSpout.BatchCoordinator<Object>
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success
public void success(long txid) Description copied from interface:ITridentSpout.BatchCoordinatorThis attempt committed successfully, so all state for this commit and before can be safely cleaned up.- Specified by:
successin interfaceITridentSpout.BatchCoordinator<Object>- Parameters:
txid- transaction id that completed
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isReady
public boolean isReady(long txid) Description copied from interface:ITridentSpout.BatchCoordinatorhint to Storm if the spout is ready for the transaction id.- Specified by:
isReadyin interfaceITridentSpout.BatchCoordinator<Object>- Parameters:
txid- the id of the transaction- Returns:
- true, if the spout is ready for the given transaction id
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