ConditionalWriter (Apache Accumulo Core 2.0.0 API)

All Superinterfaces:

AutoCloseable
```
public interface ConditionalWriter
extends AutoCloseable
```
ConditionalWriter provides the ability to do efficient, atomic read-modify-write operations on rows. These operations are performed on the tablet server while a row lock is held.

Since:

1.6.0

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class ConditionalWriter.Result

static class ConditionalWriter.Status

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`	release any resources (like threads pools) used by conditional writer
`Iterator<ConditionalWriter.Result>`	`write(Iterator<ConditionalMutation> mutations)`	This method returns one result for each mutation passed to it.
`ConditionalWriter.Result`	`write(ConditionalMutation mutation)`	This method has the same thread safety guarantees as `write(Iterator)`

- Method Detail
  - write
```
Iterator<ConditionalWriter.Result> write(Iterator<ConditionalMutation> mutations)
```
    This method returns one result for each mutation passed to it. This method is thread safe. Multiple threads can safely use a single conditional writer. Sharing a conditional writer between multiple threads may result in batching of request to tablet servers.
    
    Returns:
    
    Result for each mutation submitted. The mutations may still be processing in the background when this method returns, if so the iterator will block.
  - write
```
ConditionalWriter.Result write(ConditionalMutation mutation)
```
    This method has the same thread safety guarantees as write(Iterator)
    
    Returns:
    
    Result for the submitted mutation
  - close
```
void close()
```
    release any resources (like threads pools) used by conditional writer
    
    Specified by:
    
    close in interface AutoCloseable