TupleFieldTimestampExtractor (Storm 2.7.1 API)

java.lang.Object
- org.apache.storm.topology.TupleFieldTimestampExtractor

All Implemented Interfaces:

Serializable, TimestampExtractor
```
public final class TupleFieldTimestampExtractor
extends Object
implements TimestampExtractor
```
A TimestampExtractor that extracts timestamp from a specific field in the tuple.

See Also:

Serialized Form

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`long`	`extractTimestamp(Tuple tuple)`	Return the tuple timestamp indicating the time when the event happened.
`static TupleFieldTimestampExtractor`	`of(String fieldName)`
`String`	`toString()`

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

- Method Detail
  - of
```
public static TupleFieldTimestampExtractor of(String fieldName)
```
  - extractTimestamp
```
public long extractTimestamp(Tuple tuple)
```
    Description copied from interface: TimestampExtractor
    
    Return the tuple timestamp indicating the time when the event happened.
    
    Specified by:
    
    extractTimestamp in interface TimestampExtractor
    
    Parameters:
    
    tuple - the tuple
    
    Returns:
    
    the timestamp
  - toString
```
public String toString()
```
    Overrides:
    
    toString in class Object