CompactOnLaunchCallback (Realm 10.10.1)

All Known Implementing Classes:

DefaultCompactOnLaunchCallback
```
public interface CompactOnLaunchCallback
```
This interface is used to determine if a Realm file should be compacted the first time the file is opened and before the instance is returned.
Note that compacting a file can take a while, so compacting should generally only be done on a background thread or when used in combination with Realm.getInstanceAsync(RealmConfiguration, io.realm.Realm.Callback).

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`boolean`	`shouldCompact(long totalBytes, long usedBytes)`	This method determines if the Realm file should be compacted before opened and returned to the user.

- Method Detail
  - shouldCompact
```
boolean shouldCompact(long totalBytes,
                      long usedBytes)
```
    This method determines if the Realm file should be compacted before opened and returned to the user. It is passed the total file size (data + free space) and the bytes used by data in the file.
    
    Parameters:
    
    totalBytes - the total file size (data + free space).
    
    usedBytes - the total bytes used by data in the file.
    
    Returns:
    
    {code true} to indicate an attempt to compact the file should be made. Otherwise, the compaction will be skipped.