From 1494809af5624d7076b70087da8f81f31c6f61e7 Mon Sep 17 00:00:00 2001
From: BenWhitehead <BenWhitehead@users.noreply.github.com>
Date: Thu, 29 Aug 2024 15:54:40 -0400
Subject: [PATCH] fix: make
 ParallelCompositeUploadBlobWriteSessionConfig.ExecutorSupplier#cachedPool a
 singleton (#2691)

---
 .../ParallelCompositeUploadBlobWriteSessionConfig.java    | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java b/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
index 33ff739969..498947385e 100644
--- a/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
+++ b/google-cloud-storage/src/main/java/com/google/cloud/storage/ParallelCompositeUploadBlobWriteSessionConfig.java
@@ -452,7 +452,7 @@ private ExecutorSupplier() {}
      */
     @BetaApi
     public static ExecutorSupplier cachedPool() {
-      return new CachedSupplier();
+      return CachedSupplier.INSTANCE;
     }
 
     /**
@@ -529,12 +529,18 @@ private void writeObject(ObjectOutputStream out) throws IOException {
 
     private static class CachedSupplier extends ExecutorSupplier implements Serializable {
       private static final long serialVersionUID = 7768210719775319260L;
+      private static final CachedSupplier INSTANCE = new CachedSupplier();
 
       @Override
       Executor get() {
         ThreadFactory threadFactory = newThreadFactory();
         return Executors.newCachedThreadPool(threadFactory);
       }
+
+      /** prevent java serialization from using a new instance */
+      private Object readResolve() {
+        return INSTANCE;
+      }
     }
 
     private static class FixedSupplier extends ExecutorSupplier implements Serializable {