ReductionDataReservation (Solr 9.0.0 analytics API)

java.lang.Object
- org.apache.solr.analytics.stream.reservation.ReductionDataReservation<A,E>

Direct Known Subclasses:

BooleanReservation, DoubleReservation, FloatReservation, IntReservation, LongReservation, ReductionCheckedDataReservation, ReductionDataArrayReservation, StringReservation
```
public abstract class ReductionDataReservation<A,E>
extends Object
```
A reservation allows a ReductionDataCollector to specify a piece of data it needs to export from the shard.

Field Summary

Fields
Modifier and Type Field Description

protected A applier

protected E extractor

Constructor Summary

Constructors
Modifier Constructor Description

protected ReductionDataReservation(A applier, E extractor)

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`abstract ReductionDataReader<A>`	`createReadStream(DataInput input)`	Generate a `ReductionDataReader` that merges the set of data this reservation represents.
`abstract ReductionDataWriter<E>`	`createWriteStream(DataOutput output)`	Generate a `ReductionDataWriter` that exports the set of data this reservation represents.

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

- Field Detail
  - applier
```
protected final A applier
```
  - extractor
```
protected final E extractor
```
- Constructor Detail
  - ReductionDataReservation
```
protected ReductionDataReservation(A applier,
                                   E extractor)
```
- Method Detail
  - createReadStream
```
public abstract ReductionDataReader<A> createReadStream(DataInput input)
```
    Generate a ReductionDataReader that merges the set of data this reservation represents.
    
    Parameters:
    
    input - the shard input stream
    
    Returns:
    
    a reader from the given input
  - createWriteStream
```
public abstract ReductionDataWriter<E> createWriteStream(DataOutput output)
```
    Generate a ReductionDataWriter that exports the set of data this reservation represents.
    
    Parameters:
    
    output - the shard output stream
    
    Returns:
    
    a writer to the given output