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.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FlinkStateInternals.EarlyBinder Eagerly create user state to work around https://jira.apache.org/jira/browse/FLINK-12653.

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()
java.lang.Long	minWatermarkHoldMs() Returns the minimum over all watermark holds.
<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)

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

minWatermarkHoldMs

public java.lang.Long minWatermarkHoldMs()

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