Method called for each message received.
Method called for each message received.
message send by upstream tasks
Method called with the task is initialized.
Method called with the task is initialized.
startTime that can be used to decide from when a source producer task should replay the data source, or from when a processor task should recover its checkpoint data in to in-memory state.
Method called when task is under clean up.
Method called when task is under clean up. This can be used to cleanup resource when the application finished.
handler for unmanaged message
For managed message(type of Message), the sender mean nothing, you should not use this directory
For managed message(type of Message), the sender mean nothing, you should not use this directory
For unmanaged message, the sender represent the sender actor
the sender