org.apache.beam.runners.flink.translation.wrappers.streaming.state

Class FlinkStateInternals<K>

java.lang.Object

org.apache.beam.runners.flink.translation.wrappers.streaming.state.FlinkStateInternals<K>

All Implemented Interfaces:

org.apache.beam.runners.core.StateInternals

public class FlinkStateInternals<K>
extends java.lang.Object
implements org.apache.beam.runners.core.StateInternals

StateInternals that uses a Flink KeyedStateBackend to manage state.

Note: In the Flink streaming runner the key is always encoded using an Coder and stored in a ByteBuffer.

Constructor Summary

Constructors

Constructor and Description
FlinkStateInternals(org.apache.flink.runtime.state.KeyedStateBackend<java.nio.ByteBuffer> flinkStateBackend, org.apache.beam.sdk.coders.Coder<K> keyCoder)

Method Summary

Modifier and Type	Method and Description
K	getKey()
<T extends org.apache.beam.sdk.state.State> T	state(org.apache.beam.runners.core.StateNamespace namespace, org.apache.beam.runners.core.StateTag<T> address, org.apache.beam.sdk.state.StateContext<?> context)
org.joda.time.Instant	watermarkHold() Returns the minimum over all watermark holds.

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.beam.runners.core.StateInternals

state

Constructor Detail

FlinkStateInternals

public FlinkStateInternals(org.apache.flink.runtime.state.KeyedStateBackend<java.nio.ByteBuffer> flinkStateBackend,
                           org.apache.beam.sdk.coders.Coder<K> keyCoder)
                    throws java.lang.Exception

Throws:

java.lang.Exception

Method Detail

watermarkHold

public org.joda.time.Instant watermarkHold()

Returns the minimum over all watermark holds.

getKey

public K getKey()

Specified by:

getKey in interface org.apache.beam.runners.core.StateInternals

state

public <T extends org.apache.beam.sdk.state.State> T state(org.apache.beam.runners.core.StateNamespace namespace,
                                                           org.apache.beam.runners.core.StateTag<T> address,
                                                           org.apache.beam.sdk.state.StateContext<?> context)

Specified by:

state in interface org.apache.beam.runners.core.StateInternals