refactor: check log level before logging

Author: karenc-bq

wrapper/src/main/java/com/amazon/awslabs/jdbc/hostlistprovider/AuroraHostListProvider.java

@@ -540,6 +540,10 @@ private void validateHostPatternSetting(String hostPattern) {
   }
 
   private void logTopology(final List<HostSpec> topology) {
+    if (!LOGGER.isLoggable(Level.FINER)) {
+      return;
+    }
+
     StringBuilder msg = new StringBuilder();
     for (int i = 0; i < topology.size(); i++) {
       HostSpec hostInfo = topology.get(i);

wrapper/src/main/java/com/amazon/awslabs/jdbc/plugin/failover/ClusterAwareWriterFailoverHandler.java

@@ -35,6 +35,7 @@
 import java.util.concurrent.Executors;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
@@ -448,6 +449,10 @@ private void performFinalCleanup() {
     }
 
     private void logTopology() {
+      if (!LOGGER.isLoggable(Level.FINER)) {
+        return;
+      }
+
       StringBuilder msg = new StringBuilder();
       for (int i = 0; i < this.currentTopology.size(); i++) {
         HostSpec hostInfo = this.currentTopology.get(i);