IWALBuffer (IoTDB Server 0.14.0-preview2 API)

All Superinterfaces:

java.lang.AutoCloseable

All Known Implementing Classes:

AbstractWALBuffer, WALBuffer
```
public interface IWALBuffer
extends java.lang.AutoCloseable
```
This class serializes and flushes WALEntry. If search is enabled, the order of search index should be protected by the upper layer, and the value should start from 1.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`close()`
`long`	`getCurrentSearchIndex()`	Get current search index
`long`	`getCurrentWALFileSize()`	Get current wal file's size
`long`	`getCurrentWALFileVersion()`	Get current log version id
`boolean`	`isAllWALEntriesConsumed()`
`void`	`waitForFlush()`	Wait for next flush operation done
`boolean`	`waitForFlush(long time, java.util.concurrent.TimeUnit unit)`	Wait for next flush operation done
`void`	`write(WALEntry walEntry)`	Write WALEntry into wal buffer.

- Method Detail
  - write
```
void write(WALEntry walEntry)
```
    Write WALEntry into wal buffer.
    
    Parameters:
    
    walEntry - info will be written into wal buffer
  - getCurrentWALFileVersion
```
long getCurrentWALFileVersion()
```
    Get current log version id
  - getCurrentWALFileSize
```
long getCurrentWALFileSize()
```
    Get current wal file's size
  - getCurrentSearchIndex
```
long getCurrentSearchIndex()
```
    Get current search index
  - close
```
void close()
```
    Specified by:
    
    close in interface java.lang.AutoCloseable
  - waitForFlush
```
void waitForFlush()
           throws java.lang.InterruptedException
```
    Wait for next flush operation done
    
    Throws:
    
    java.lang.InterruptedException
  - waitForFlush
```
boolean waitForFlush(long time,
                     java.util.concurrent.TimeUnit unit)
              throws java.lang.InterruptedException
```
    Wait for next flush operation done
    
    Throws:
    
    java.lang.InterruptedException
  - isAllWALEntriesConsumed
```
boolean isAllWALEntriesConsumed()
```