Package org.apache.datafusion

Class CacheManagerOptions

java.lang.Object

org.apache.datafusion.CacheManagerOptions

public final class CacheManagerOptions
extends Object

Configuration for DataFusion's built-in CacheManager. Pass an instance to SessionContextBuilder.cacheManager(CacheManagerOptions) to turn on any of the three upstream-provided caches at session construction time.

The three caches are independent; calling one setter does not affect the others. A setter that is never called leaves the upstream default in place — so existing callers that don't touch this builder see no behavioral change.

• CacheManagerOptions.Builder.fileMetadataCache(long) — caches file-embedded metadata (e.g. parquet footers / page metadata). Backed by DefaultFilesMetadataCache with the supplied byte cap.
• CacheManagerOptions.Builder.listFilesCache(long, Duration) — caches results of object-store list operations. Backed by DefaultListFilesCache with the supplied byte cap and optional TTL (null = infinite).
• CacheManagerOptions.Builder.fileStatisticsCache(boolean) — caches per-file row counts and column statistics. Backed by DefaultFileStatisticsCache; no bytewise cap exists upstream.

This v1 surface configures the built-in cache implementations. Plugging custom Java cache implementations through a JNI upcall path is intentionally out of scope — every cache lookup is a hot path during scans, and routing them through Java would defeat the cache.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final class	CacheManagerOptions.Builder	Builder for CacheManagerOptions.

Method Summary

Modifier and Type	Method	Description
static CacheManagerOptions.Builder	builder()	Begin building a CacheManagerOptions instance.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

builder

public static CacheManagerOptions.Builder builder()

Begin building a CacheManagerOptions instance.