From 110a296f00ee71dec863983f96cb0c916e8cb156 Mon Sep 17 00:00:00 2001
From: Michael Gibney <michael@michaelgibney.net>
Date: Wed, 13 Sep 2023 14:20:10 -0400
Subject: [PATCH] add hook for Directory impls to directly supply their size
 (#141)

---
 .../src/java/org/apache/solr/core/DirectoryFactory.java    | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/solr/core/src/java/org/apache/solr/core/DirectoryFactory.java b/solr/core/src/java/org/apache/solr/core/DirectoryFactory.java
index 34bed4dc50e..b860d4608c3 100644
--- a/solr/core/src/java/org/apache/solr/core/DirectoryFactory.java
+++ b/solr/core/src/java/org/apache/solr/core/DirectoryFactory.java
@@ -265,7 +265,14 @@ public boolean isAbsolute(String path) {
     return Path.of(path).isAbsolute();
   }
 
+  public interface SizeAware {
+    long size() throws IOException;
+  }
+
   public static long sizeOfDirectory(Directory directory) throws IOException {
+    if (directory instanceof SizeAware) {
+      return ((SizeAware) directory).size();
+    }
     final String[] files = directory.listAll();
     long size = 0;