ProcessWindowFunction.Context (Flink : Runtime 2.0.0 API)

java.lang.Object
- org.apache.flink.streaming.api.functions.windowing.ProcessWindowFunction.Context

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

InternalProcessApplyWindowContext, InternalProcessWindowContext, InternalProcessWindowContext

Enclosing class:

ProcessWindowFunction<IN,OUT,KEY,W extends Window>
```
public abstract class ProcessWindowFunction.Context
extends Object
implements Serializable
```
The context holding window metadata.

See Also:

Serialized Form

Constructor Summary

Constructors
Constructor Description

Context()

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract long`	`currentProcessingTime()`	Returns the current processing time.
`abstract long`	`currentWatermark()`	Returns the current event-time watermark.
`abstract org.apache.flink.api.common.state.KeyedStateStore`	`globalState()`	State accessor for per-key global state.
`abstract <X> void`	`output(org.apache.flink.util.OutputTag<X> outputTag, X value)`	Emits a record to the side output identified by the `OutputTag`.
`abstract W`	`window()`	Returns the window that is being evaluated.
`abstract org.apache.flink.api.common.state.KeyedStateStore`	`windowState()`	State accessor for per-key and per-window state.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - Context
```
public Context()
```
- Method Detail
  - window
```
public abstract W window()
```
    Returns the window that is being evaluated.
  - currentProcessingTime
```
public abstract long currentProcessingTime()
```
    Returns the current processing time.
  - currentWatermark
```
public abstract long currentWatermark()
```
    Returns the current event-time watermark.
  - windowState
```
public abstract org.apache.flink.api.common.state.KeyedStateStore windowState()
```
    State accessor for per-key and per-window state.
    NOTE:If you use per-window state you have to ensure that you clean it up by implementing ProcessWindowFunction#clear(Context).
  - globalState
```
public abstract org.apache.flink.api.common.state.KeyedStateStore globalState()
```
    State accessor for per-key global state.
  - output
```
public abstract <X> void output(org.apache.flink.util.OutputTag<X> outputTag,
                                X value)
```
    Emits a record to the side output identified by the OutputTag.
    
    Parameters:
    
    outputTag - the OutputTag that identifies the side output to emit to.
    
    value - The record to emit.