|Enum Constant and Description|
A BOUNDED stream is a stream with finite records.
A CONTINUOUS_UNBOUNDED stream is a stream with infinite records.
|Modifier and Type||Method and Description|
Returns the enum constant of this type with the specified name.
Returns an array containing the constants of this enum type, in the order they are declared.
clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf
public static final Boundedness BOUNDED
In the context of sources, a BOUNDED stream expects the source to put a boundary of the records it emits. Such boundaries could be number of records, number of bytes, elapsed time, and so on. Such indication of how to bound a stream is typically passed to the sources via configurations. When the sources emit a BOUNDED stream, Flink may leverage this property to do specific optimizations in the execution.
Unlike unbounded streams, the bounded streams are usually order insensitive. That means the source implementations may not have to keep track of the event times or watermarks. Instead, a higher throughput would be preferred.
public static final Boundedness CONTINUOUS_UNBOUNDED
In the context of sources, an infinite stream expects the source implementation to run without an upfront indication to Flink that they will eventually stop. The sources may eventually be terminated when users cancel the jobs or some source-specific condition is met.
A CONTINUOUS_UNBOUNDED stream may also eventually stop at some point. But before that happens, Flink always assumes the sources are going to run forever.
public static Boundedness values()
for (Boundedness c : Boundedness.values()) System.out.println(c);
public static Boundedness valueOf(String name)
Copyright © 2014–2021 The Apache Software Foundation. All rights reserved.