Package org.apache.nifi.cdc.event.io

Interface EventWriter<T extends EventInfo>

All Known Implementing Classes:

AbstractEventWriter

public interface EventWriter<T extends EventInfo>

An interface to write an event to the process session. Note that a single event may produce multiple flow files.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	APPLICATION_JSON
static final String	CDC_EVENT_TYPE_ATTRIBUTE
static final String	SEQUENCE_ID_KEY

Method Summary

Modifier and Type	Method	Description
long	writeEvent(org.apache.nifi.processor.ProcessSession session, String transitUri, T eventInfo, long currentSequenceId, org.apache.nifi.processor.Relationship relationship, EventWriterConfiguration eventWriterConfiguration)	Writes the given event to the process session, possibly via transferring it to the specified relationship (usually used for success)

Field Details

APPLICATION_JSON

static final String APPLICATION_JSON

See Also:

• Constant Field Values

SEQUENCE_ID_KEY

static final String SEQUENCE_ID_KEY

See Also:

• Constant Field Values

CDC_EVENT_TYPE_ATTRIBUTE

static final String CDC_EVENT_TYPE_ATTRIBUTE

See Also:

• Constant Field Values

Method Details

writeEvent

long writeEvent(org.apache.nifi.processor.ProcessSession session,
 String transitUri,
 T eventInfo,
 long currentSequenceId,
 org.apache.nifi.processor.Relationship relationship,
 EventWriterConfiguration eventWriterConfiguration)

Writes the given event to the process session, possibly via transferring it to the specified relationship (usually used for success)

Parameters:

session - The session to write the event to

transitUri - The URI indicating the source MySQL system from which the specified event is associated

eventInfo - The event data

currentSequenceId - The current sequence ID

relationship - A relationship to transfer any flowfile(s) to

eventWriterConfiguration - A configuration object used for FlowFile management (how many events to write to each FlowFile, e.g.)

Returns:

a sequence ID, usually incremented from the specified current sequence ID by the number of FlowFiles transferred and/or committed