Package io.pravega.connectors.flink

Class AbstractStreamingWriterBuilder<T,B extends AbstractStreamingWriterBuilder>

java.lang.Object

io.pravega.connectors.flink.AbstractWriterBuilder<B>

io.pravega.connectors.flink.AbstractStreamingWriterBuilder<T,B>

Type Parameters:

T - the element type.

B - the builder type.

All Implemented Interfaces:

java.io.Serializable

Direct Known Subclasses:

FlinkPravegaTableSink.AbstractTableSinkBuilder, FlinkPravegaWriter.Builder, Pravega.TableSinkWriterBuilder

public abstract class AbstractStreamingWriterBuilder<T,B extends AbstractStreamingWriterBuilder>
extends AbstractWriterBuilder<B>

An abstract streaming writer builder. The builder is abstracted to act as the base for both the FlinkPravegaWriter and FlinkPravegaTableSink builders.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
protected static long	DEFAULT_TXN_LEASE_RENEWAL_PERIOD_MILLIS
protected boolean	enableWatermark
protected org.apache.flink.api.common.time.Time	txnLeaseRenewalPeriod
protected PravegaWriterMode	writerMode

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AbstractStreamingWriterBuilder()

Method Summary

Modifier and Type	Method	Description
B	enableWatermark(boolean enableWatermark)	Enable watermark.
B	withTxnLeaseRenewalPeriod(org.apache.flink.api.common.time.Time period)	Sets the transaction lease renewal period.
B	withWriterMode(PravegaWriterMode writerMode)	Sets the writer mode to provide at-least-once or exactly-once guarantees.

Methods inherited from class io.pravega.connectors.flink.AbstractWriterBuilder

builder, enableMetrics, forStream, forStream, getPravegaConfig, isMetricsEnabled, resolveStream, withPravegaConfig

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

DEFAULT_TXN_LEASE_RENEWAL_PERIOD_MILLIS

protected static final long DEFAULT_TXN_LEASE_RENEWAL_PERIOD_MILLIS

See Also:

Constant Field Values

writerMode

protected PravegaWriterMode writerMode

enableWatermark

protected boolean enableWatermark

txnLeaseRenewalPeriod

protected org.apache.flink.api.common.time.Time txnLeaseRenewalPeriod

Constructor Detail

AbstractStreamingWriterBuilder

protected AbstractStreamingWriterBuilder()

Method Detail

withWriterMode

public B withWriterMode(PravegaWriterMode writerMode)

Sets the writer mode to provide at-least-once or exactly-once guarantees.

Parameters:

writerMode - The writer mode of BEST_EFFORT, ATLEAST_ONCE, or EXACTLY_ONCE.

enableWatermark

public B enableWatermark(boolean enableWatermark)

Enable watermark.

Parameters:

enableWatermark - boolean

withTxnLeaseRenewalPeriod

public B withTxnLeaseRenewalPeriod(org.apache.flink.api.common.time.Time period)

Sets the transaction lease renewal period. When the writer mode is set to EXACTLY_ONCE, transactions are used to persist events to the Pravega stream. The transaction interval corresponds to the Flink checkpoint interval. Throughout that interval, the transaction is kept alive with a lease that is periodically renewed. This configuration setting sets the lease renewal period. The default value is 30 seconds.

Parameters:

period - the lease renewal period