All Known Implementing Classes:

LuceneIncrementalIndexManager
```
@LuceneIndependent
@Internal
public interface IncrementalIndexManager
```
This manager is responsible for manipulating single Lucene directory and single index queue. All operations which are local to this index and don't depend on other indexes should live here.

Since:

7.9.0

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`void`	`addTask(ConfluenceIndexTask task)`	Adds a new task to the index queue
`default boolean`	`flushQueue()`	Flushes the index queue, processing all of the tasks.
`boolean`	`flushQueue(IndexManager.IndexQueueFlushMode flushMode)`	Flushes the index queue, processing a batch of the tasks
`@Nullable FlushStatistics`	`getLastNonEmptyFlushStats()`
`int`	`getQueueSize()`
`long`	`getSizeInBytes()`
`boolean`	`isFlushing()`	Returns true if the index queue is currently being flushed.
`default void`	`refreshIndex()`	Refresh the index immediately, which publishes its most recent changes and makes them available for searching.
`void`	`resetIndexQueue()`	Resets the index queue removes all entries from the queue without processing them.

- Method Detail
  - isFlushing
```
boolean isFlushing()
```
    Returns true if the index queue is currently being flushed.
    
    Returns:
    
    true if flushing, false otherwise.
  - flushQueue
```
boolean flushQueue(IndexManager.IndexQueueFlushMode flushMode)
```
    Flushes the index queue, processing a batch of the tasks
    
    Parameters:
    
    flushMode - - whether to flush the entire queue, or just one batch of batchsize as specified by the system property index.queue.batch.size
    
    Returns:
    
    whether the flush actually took place
  - flushQueue
```
default boolean flushQueue()
```
    Flushes the index queue, processing all of the tasks.
    
    Returns:
    
    whether the flush actually took place
  - resetIndexQueue
```
void resetIndexQueue()
```
    Resets the index queue removes all entries from the queue without processing them.
  - getLastNonEmptyFlushStats
```
@Nullable FlushStatistics getLastNonEmptyFlushStats()
```
    Returns:
    
    the information about last queue flush. null if no flush has occured from system start.
  - getQueueSize
```
int getQueueSize()
```
    Returns:
    
    the number of pending items in the corresponding index queue
    
    Since:
    
    7.9.0
  - addTask
```
void addTask(ConfluenceIndexTask task)
```
    Adds a new task to the index queue
  - refreshIndex
```
default void refreshIndex()
                   throws IOException
```
    Refresh the index immediately, which publishes its most recent changes and makes them available for searching. This method is only applicable to the OpenSearch platform.
    
    Throws:
    
    IOException
  - getSizeInBytes
```
long getSizeInBytes()
```
    Returns:
    
    size of the index in bytes
    
    Since:
    
    8.8.0

Interface IncrementalIndexManager

Method Summary

Method Detail

isFlushing

flushQueue

flushQueue

resetIndexQueue

getLastNonEmptyFlushStats

getQueueSize

addTask

refreshIndex

getSizeInBytes