JournalGarbageCollector (Jackrabbit Oak 1.62.0 API)

java.lang.Object
- org.apache.jackrabbit.oak.plugins.document.JournalGarbageCollector

```
public class JournalGarbageCollector
extends java.lang.Object
```
The JournalGarbageCollector can clean up JournalEntries that are older than a particular age.
It would typically be invoked in conjunction with the VersionGarbageCollector but must not be confused with that one - 'journal' refers to the separate collection that contains changed paths per background writes used for observation.

Constructor Summary

Constructors
Constructor Description

JournalGarbageCollector(DocumentNodeStore nodeStore, long maxRevisionAgeMillis)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`int`	`gc()`	Deletes entries in the journal that are older than `getMaxRevisionAgeMillis()`.
`Revision`	`getTailRevision()`

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

- Constructor Detail
  - JournalGarbageCollector
```
public JournalGarbageCollector(DocumentNodeStore nodeStore,
                               long maxRevisionAgeMillis)
```
- Method Detail
  - gc
```
public int gc()
```
    Deletes entries in the journal that are older than getMaxRevisionAgeMillis().
    
    Returns:
    
    the number of entries that have been removed
  - getTailRevision
```
public Revision getTailRevision()
```