Small fixes

Author: emmyzhou-db

databricks-sdk-java/src/main/java/com/databricks/sdk/core/oauth/RefreshableTokenSource.java

@@ -213,7 +213,7 @@ protected Token getTokenAsync() {
    * Trigger an asynchronous refresh of the token if not already in progress and last refresh
    * succeeded.
    */
-  protected synchronized void triggerAsyncRefresh() {
+  private synchronized void triggerAsyncRefresh() {
     // Check token state to avoid triggering a refresh if another thread has already refreshed it
     if (!refreshInProgress && lastRefreshSucceeded && getTokenState(token) != TokenState.FRESH) {
       refreshInProgress = true;

databricks-sdk-java/src/main/java/com/databricks/sdk/core/oauth/Token.java

@@ -70,7 +70,7 @@ public String getAccessToken() {
   }
 
   /**
-   * Returns the expiry time of the token as a LocalDateTime.
+   * Returns the expiry time of the token as a Instant.
    *
    * @return the expiry time
    */

databricks-sdk-java/src/test/java/com/databricks/sdk/core/oauth/DataPlaneTokenSourceTest.java

@@ -194,6 +194,7 @@ void testDataPlaneTokenSource(
       assertEquals(expectedToken.getAccessToken(), token.getAccessToken());
       assertEquals(expectedToken.getTokenType(), token.getTokenType());
       assertEquals(expectedToken.getRefreshToken(), token.getRefreshToken());
+      assertTrue(expectedToken.getExpiry().isAfter(Instant.now()));
     }
   }
 

databricks-sdk-java/src/test/java/com/databricks/sdk/core/oauth/FileTokenCacheTest.java

@@ -54,6 +54,7 @@ void testSaveAndLoadToken() {
     assertEquals("access-token", loadedToken.getAccessToken());
     assertEquals("Bearer", loadedToken.getTokenType());
     assertEquals("refresh-token", loadedToken.getRefreshToken());
+    assertEquals(expiry, loadedToken.getExpiry());
   }
 
   @Test