GCJournal (Jackrabbit Oak 1.76.0 API)

java.lang.Object
- org.apache.jackrabbit.oak.segment.file.GCJournal

```
public class GCJournal
extends Object
```
Persists the repository size and the reclaimed size following a cleanup operation in the gc.log file with the format: 'repoSize, reclaimedSize, timestamp, gc generation, gc full generation (since Oak 1.8), number of nodes compacted, root id (since Oak 1.8)'.

Nested Class Summary

Nested Classes
Modifier and Type Class Description

static class GCJournal.GCJournalEntry

Constructor Summary

Constructors
Constructor Description

GCJournal(@NotNull GCJournalFile journalFile)

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`persist(long reclaimedSize, long repoSize, @NotNull GCGeneration gcGeneration, long nodes, @NotNull RecordId root)`	Persists the repository stats (current size, reclaimed size, gc generation, number of compacted nodes) following a cleanup operation for a successful compaction.
`GCJournal.GCJournalEntry`	`read()`	Returns the latest entry available
`Collection<GCJournal.GCJournalEntry>`	`readAll()`	Returns all available entries from the journal

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

- Constructor Detail
  - GCJournal
```
public GCJournal(@NotNull
                 @NotNull GCJournalFile journalFile)
```
- Method Detail
  - persist
```
public void persist(long reclaimedSize,
                    long repoSize,
                    @NotNull
                    @NotNull GCGeneration gcGeneration,
                    long nodes,
                    @NotNull
                    @NotNull RecordId root)
```
    Persists the repository stats (current size, reclaimed size, gc generation, number of compacted nodes) following a cleanup operation for a successful compaction. NOOP if the gcGeneration is the same as the one persisted previously.
    
    Parameters:
    
    reclaimedSize - size reclaimed by cleanup
    
    repoSize - current repo size
    
    gcGeneration - gc generation
    
    nodes - number of compacted nodes
    
    root - record id of the compacted root node
  - read
```
public GCJournal.GCJournalEntry read()
```
    Returns the latest entry available
  - readAll
```
public Collection<GCJournal.GCJournalEntry> readAll()
```
    Returns all available entries from the journal