SegmentBufferMonitor (Oak Segment Tar 1.22.13 API)

java.lang.Object
- org.apache.jackrabbit.oak.segment.SegmentBufferMonitor

```
public class SegmentBufferMonitor
extends Object
```
This class exposes CounterStats for allocations and de-allocations of Buffer instances:
- DIRECT_BUFFER_COUNT: number of allocated direct byte buffers.
- DIRECT_BUFFER_CAPACITY: total capacity of the allocated direct byte buffers.
- HEAP_BUFFER_COUNT: number of allocated heap byte buffers.
- HEAP_BUFFER_CAPACITY: total capacity of the allocated heap byte buffers.
Users of this class call trackAllocation(Buffer) to update above statistics.

Field Summary

Fields
Modifier and Type	Field	Description
`static String`	`DIRECT_BUFFER_CAPACITY`	Total capacity of the allocated direct byte buffers.
`static String`	`DIRECT_BUFFER_COUNT`	Number of allocated direct byte buffers
`static String`	`HEAP_BUFFER_CAPACITY`	Total capacity of the allocated heap byte buffers.
`static String`	`HEAP_BUFFER_COUNT`	Number of allocated heap byte buffers

Constructor Summary

Constructors
Constructor	Description
`SegmentBufferMonitor(@NotNull org.apache.jackrabbit.oak.stats.StatisticsProvider statisticsProvider)`	Create a new instance using the passed `statisticsProvider` to expose buffer allocations.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`trackAllocation(@NotNull org.apache.jackrabbit.oak.commons.Buffer buffer)`	Track the allocation of a `buffer` and update the exposed statistics.

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

- Field Detail
  - DIRECT_BUFFER_COUNT
```
public static final String DIRECT_BUFFER_COUNT
```
    Number of allocated direct byte buffers
    
    See Also:
    
    Constant Field Values
  - DIRECT_BUFFER_CAPACITY
```
public static final String DIRECT_BUFFER_CAPACITY
```
    Total capacity of the allocated direct byte buffers.
    
    See Also:
    
    Constant Field Values
  - HEAP_BUFFER_COUNT
```
public static final String HEAP_BUFFER_COUNT
```
    Number of allocated heap byte buffers
    
    See Also:
    
    Constant Field Values
  - HEAP_BUFFER_CAPACITY
```
public static final String HEAP_BUFFER_CAPACITY
```
    Total capacity of the allocated heap byte buffers.
    
    See Also:
    
    Constant Field Values
- Constructor Detail
  - SegmentBufferMonitor
```
public SegmentBufferMonitor(@NotNull
                            @NotNull org.apache.jackrabbit.oak.stats.StatisticsProvider statisticsProvider)
```
    Create a new instance using the passed statisticsProvider to expose buffer allocations.
    
    Parameters:
    
    statisticsProvider -
- Method Detail
  - trackAllocation
```
public void trackAllocation(@NotNull
                            @NotNull org.apache.jackrabbit.oak.commons.Buffer buffer)
```
    Track the allocation of a buffer and update the exposed statistics.
    
    Parameters:
    
    buffer -