From e333b6d5d38b0cbafde6d65ce590c4acd68137db Mon Sep 17 00:00:00 2001
From: Maciej Sokol <maciej.sokol@ericsson.com>
Date: Thu, 14 Sep 2023 13:25:36 +0200
Subject: [PATCH] Document more ways to override driver config

---
 .../impl/LocalNativeConnectionProvider.java      |  4 +++-
 docs/SETUP.md                                    | 16 +++++++++++++---
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/connection.impl/src/main/java/com/ericsson/bss/cassandra/ecchronos/connection/impl/LocalNativeConnectionProvider.java b/connection.impl/src/main/java/com/ericsson/bss/cassandra/ecchronos/connection/impl/LocalNativeConnectionProvider.java
index f8d1b3fbe..c9ac49a3b 100644
--- a/connection.impl/src/main/java/com/ericsson/bss/cassandra/ecchronos/connection/impl/LocalNativeConnectionProvider.java
+++ b/connection.impl/src/main/java/com/ericsson/bss/cassandra/ecchronos/connection/impl/LocalNativeConnectionProvider.java
@@ -221,7 +221,9 @@ private static CqlSession createSession(final Builder builder)
             {
                 sessionBuilder.withMetricRegistry(builder.myMeterRegistry);
             }
-            sessionBuilder.withConfigLoader(loaderBuilder.build());
+            DriverConfigLoader driverConfigLoader = loaderBuilder.build();
+            LOG.debug("Driver configuration: {}", driverConfigLoader.getInitialConfig().getDefaultProfile().entrySet());
+            sessionBuilder.withConfigLoader(driverConfigLoader);
             return sessionBuilder.build();
         }
 
diff --git a/docs/SETUP.md b/docs/SETUP.md
index 6db5da9a7..e0be679d4 100644
--- a/docs/SETUP.md
+++ b/docs/SETUP.md
@@ -182,10 +182,12 @@ More information about the custom connection provider can be found [here](STANDA
 
 For more advanced use-cases, it's possible to override the java-driver configuration,
 please see [reference configuration](https://docs.datastax.com/en/developer/java-driver/4.17/manual/core/configuration/reference/) for available configuration options.
-To override default java-driver configuration, make sure `application.conf` file is available on the class path.
-The easiest way to do this is by simply putting `application.conf` file in the `conf` directory of ecChronos.
+To override default java-driver configuration,
+follow any of the supported methods documented at [datastax docs](https://docs.datastax.com/en/developer/java-driver/4.17/manual/core/configuration/#default-implementation-typesafe-config).
 
-Example:
+Examples:
+
+`application.conf` in `conf` directory of ecChronos:
 
 ```
 datastax-java-driver {
@@ -198,6 +200,14 @@ datastax-java-driver {
 }
 ```
 
+system properties (you can put these in `jvm.options` file of ecChronos:
+
+```
+-Ddatastax-java-driver.advanced.prepared-statements.prepare-on-all-nodes=false -Ddatastax-java-driver.advanced.prepared-statements.reprepare-on-up.enabled=false
+```
+
+
+
 ## Running ecChronos
 
 To run ecChronos execute `bin/ecc` or `bin/ecctool start` from the root directory.