TierBasedSegmentDirectoryLoader (Pinot local segment implementations 1.0.0 API)

java.lang.Object
- org.apache.pinot.segment.local.loader.TierBasedSegmentDirectoryLoader

All Implemented Interfaces:

SegmentDirectoryLoader
```
public class TierBasedSegmentDirectoryLoader
extends Object
implements SegmentDirectoryLoader
```
Implementation of SegmentDirectoryLoader that can move segments across data dirs configured as storage tiers.

Constructor Summary

Constructors
Constructor Description

TierBasedSegmentDirectoryLoader()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`delete(SegmentDirectoryLoaderContext segmentLoaderContext)`	Delete segment data on the last known tier as tracked in the tier track file.
`SegmentDirectory`	`load(URI indexDir, SegmentDirectoryLoaderContext segmentLoaderContext)`	Creates and loads the `SegmentLocalFSDirectory` which is the default implementation of `SegmentDirectory`
`boolean`	`needsTierMigration(String targetTier, String currentTier)`

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

- Constructor Detail
  - TierBasedSegmentDirectoryLoader
```
public TierBasedSegmentDirectoryLoader()
```
- Method Detail
  - load
```
public SegmentDirectory load(URI indexDir,
                             SegmentDirectoryLoaderContext segmentLoaderContext)
                      throws Exception
```
    Creates and loads the SegmentLocalFSDirectory which is the default implementation of SegmentDirectory
    
    Specified by:
    
    load in interface SegmentDirectoryLoader
    
    Parameters:
    
    indexDir - the current segment index directory
    
    segmentLoaderContext - context for instantiation of the SegmentDirectory. The target tier set in context is used to decide which data directory to keep the segment data.
    
    Returns:
    
    instance of SegmentLocalFSDirectory
    
    Throws:
    
    Exception
  - delete
```
public void delete(SegmentDirectoryLoaderContext segmentLoaderContext)
            throws Exception
```
    Delete segment data on the last known tier as tracked in the tier track file.
    
    Specified by:
    
    delete in interface SegmentDirectoryLoader
    
    Throws:
    
    Exception
  - needsTierMigration
```
public boolean needsTierMigration(String targetTier,
                                  String currentTier)
```
    Specified by:
    
    needsTierMigration in interface SegmentDirectoryLoader