CellSelector

```
public final class CellSelector

                    
```
Canonical multi-region cell-selection algorithm. Pinned by libs/mobile-sdk/tests/drift/cell-selection.json.
Order of operations:
- If preferredRegion is set AND that endpoint is healthy → pick it.
- Else if autoRegionDetection → probe every healthy /health, pick lowest latency.
- Else → sort healthy endpoints by priority asc, pick first.
- Else → null (caller fails closed; no events transmitted).
Health checks run on a 60s tick; if the active cell turns unhealthy the selector re-runs the algorithm and updates the active endpoint in place.

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`public class`	`CellSelector.Companion`

Constructor Summary

Constructors
Constructor	Description
`CellSelector(List<CellEndpoint> endpoints, CellRegion preferredRegion, Boolean autoRegionDetection, OkHttpClient httpClient)`

Method Summary

Modifier and Type	Method	Description
`final CellEndpoint`	`select()`	Run the selection algorithm.
`final CellEndpoint`	`active()`	Current active cell.
`final CellEndpoint`	`runHealthChecks()`	Run health checks against every endpoint.

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

- Constructor Detail
  - CellSelector
```
CellSelector(List<CellEndpoint> endpoints, CellRegion preferredRegion, Boolean autoRegionDetection, OkHttpClient httpClient)
```
- Method Detail
  - select
```
 final CellEndpoint select()
```
    Run the selection algorithm. Blocks for at most ~2s per healthy cell when autoRegionDetection is enabled; returns immediately otherwise. Caller should invoke off the main thread.
  - active
```
 final CellEndpoint active()
```
    Current active cell. Null until select has been called.
  - runHealthChecks
```
 final CellEndpoint runHealthChecks()
```
    Run health checks against every endpoint. Flip their healthy flag. If the active endpoint turned unhealthy, re-run selection.