public some stuff in Vortex-datafusion

Author: xudong963

vortex-datafusion/src/persistent/cache.rs

@@ -20,7 +20,7 @@ use vortex::stats::{Precision, Stat};
 use vortex::utils::aliases::DefaultHashBuilder;
 
 #[derive(Clone)]
-pub(crate) struct VortexFileCache {
+pub struct VortexFileCache {
     file_cache: Cache<FileKey, VortexFile, DefaultHashBuilder>,
     segment_cache: Cache<SegmentKey, ByteBuffer, DefaultHashBuilder>,
     session: Arc<VortexSession>,
@@ -50,6 +50,7 @@ struct SegmentKey {
 }
 
 impl VortexFileCache {
+    /// Create a new [`VortexFileCache`] with the given size.
     pub fn new(size_mb: usize, segment_size_mb: usize, session: Arc<VortexSession>) -> Self {
         let file_cache = Cache::builder()
             .max_capacity(size_mb as u64 * (1 << 20))

vortex-datafusion/src/persistent/mod.rs

@@ -9,6 +9,7 @@ mod opener;
 mod sink;
 mod source;
 
+pub use cache::VortexFileCache;
 pub use format::{VortexFormat, VortexFormatFactory, VortexOptions};
 pub use source::VortexSource;
 

vortex-datafusion/src/persistent/source.rs

@@ -56,7 +56,8 @@ pub struct VortexSource {
 }
 
 impl VortexSource {
-    pub(crate) fn new(file_cache: VortexFileCache, metrics: VortexMetrics) -> Self {
+    /// Creates a new VortexSource instance.
+    pub fn new(file_cache: VortexFileCache, metrics: VortexMetrics) -> Self {
         Self {
             file_cache,
             metrics,