From 1d7e4e143d2c1c147c5e7c9229032a427aca2e00 Mon Sep 17 00:00:00 2001
From: Hailong Wen <hailongwen@google.com>
Date: Thu, 14 Mar 2024 04:42:53 +0000
Subject: [PATCH] feat: allow attempt direct path xds via env var

---
 .../com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java     | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java b/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
index 0f4b2275717..29de1fe1ff5 100644
--- a/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
+++ b/google-cloud-spanner/src/main/java/com/google/cloud/spanner/spi/v1/GapicSpannerRpc.java
@@ -354,6 +354,11 @@ public GapicSpannerRpc(final SpannerOptions options) {
                   options.isAttemptDirectPath()
                       && !Objects.equals(
                           options.getScopedCredentials(), NoCredentials.getInstance()));
+      String directPathXdsEnv = System.getenv("GOOGLE_SPANNER_ENABLE_DIRECT_ACCESS");
+      boolean isAttemptDirectPathXds = Boolean.parseBoolean(directPathXdsEnv);
+      if (isAttemptDirectPathXds) {
+        defaultChannelProviderBuilder.setAttemptDirectPathXds();
+      }
       if (options.isUseVirtualThreads()) {
         ExecutorService executor =
             tryCreateVirtualThreadPerTaskExecutor("spanner-virtual-grpc-executor");