Improve Azure App Configuration error handling

ojdbc-provider-azure/src/main/java/oracle/jdbc/provider/azure/authentication/TokenCredentialFactory.java

@@ -139,13 +139,14 @@ public Resource<TokenCredential> request(ParameterSet parameterSet) {
    * used are configured by the parameters of the given {@code parameters}.
    * Supported parameters are defined by the class variables in
    * {@link TokenCredentialFactory}.
-   * @param parameters parameters that configure credentials. Not null.
+   * @param parameterSet parameters that configure credentials. Not null.
    * @return Credentials configured by parameters
    */
   private static TokenCredential getCredential(ParameterSet parameterSet) {
 
     AzureAuthenticationMethod authenticationMethod =
-      parameterSet.getRequired(AUTHENTICATION_METHOD);
+      parameterSet.contains(AUTHENTICATION_METHOD)
+        ? parameterSet.getRequired(AUTHENTICATION_METHOD) : AzureAuthenticationMethod.DEFAULT;
 
     switch (authenticationMethod) {
       case DEFAULT:
@@ -227,7 +228,7 @@ private static InteractiveBrowserCredential interactiveCredentials(
    * the Azure SDK's
    * {@link com.azure.identity.EnvironmentCredential} class.
    * </p>
-   * @param parameterSet Optional parameters. Not null.
+   * @param parameters Optional parameters. Not null.
    * @return Credentials for a service principal. Not null.
    * @throws IllegalStateException If a required parameter is not configured.
    */

ojdbc-provider-azure/src/main/java/oracle/jdbc/provider/azure/configuration/AzureAppConfigurationProvider.java

@@ -58,6 +58,8 @@
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
+import java.io.UncheckedIOException;
+import java.sql.SQLException;
 import java.util.Objects;
 import java.util.Properties;
 
@@ -110,37 +112,42 @@ public class AzureAppConfigurationProvider
    *         Configuration
    */
   @Override
-  public Properties getConnectionProperties(String location) {
+  public Properties getConnectionProperties(String location) throws SQLException {
     // If the location was already consulted, re-use the properties
     Properties cachedProp = CACHE.get(location);
     if (Objects.nonNull(cachedProp)) {
       return cachedProp;
     }
 
-    Properties properties = getRemoteProperties(location);
-    if (properties.containsKey(CONFIG_TTL_JSON_OBJECT_NAME)) {
-      // Remove the TTL information from the properties, if presents
-      long configTimeToLive = Long.parseLong(
-        properties.getProperty(CONFIG_TTL_JSON_OBJECT_NAME));
-
-      properties.remove(CONFIG_TTL_JSON_OBJECT_NAME);
-
-      CACHE.put(
-        location,
-        properties,
-        configTimeToLive,
-        () -> this.refreshProperties(location),
-        MS_REFRESH_TIMEOUT,
-        MS_RETRY_INTERVAL);
-    } else {
-      CACHE.put(location,
-        properties,
-        () -> this.refreshProperties(location),
-        MS_REFRESH_TIMEOUT,
-        MS_RETRY_INTERVAL);
-    }
+    try {
+      Properties properties = getRemoteProperties(location);
+      if (properties.containsKey(CONFIG_TTL_JSON_OBJECT_NAME)) {
+        // Remove the TTL information from the properties, if presents
+        long configTimeToLive = Long.parseLong(
+                properties.getProperty(CONFIG_TTL_JSON_OBJECT_NAME));
+
+        properties.remove(CONFIG_TTL_JSON_OBJECT_NAME);
+
+        CACHE.put(
+                location,
+                properties,
+                configTimeToLive,
+                () -> this.refreshProperties(location),
+                MS_REFRESH_TIMEOUT,
+                MS_RETRY_INTERVAL);
+      } else {
+        CACHE.put(location,
+                properties,
+                () -> this.refreshProperties(location),
+                MS_REFRESH_TIMEOUT,
+                MS_RETRY_INTERVAL);
+      }
 
-    return properties;
+      return properties;
+    } catch (UncheckedIOException | AzureException e) {
+      throw new SQLException("Unable to load Azure App Configuration at " + location, e
+      );
+    }
   }
 
   /**

ojdbc-provider-azure/src/test/java/oracle/jdbc/provider/azure/configuration/AzureAppConfigurationProviderTest.java

@@ -146,6 +146,12 @@ public void testCachePurged() throws SQLException {
     }
   }
 
+  @Test
+  public void testInvalidConfiguration() {
+    String invalidUrl = "jdbc:oracle:thin:@config-azure://invalid-config";
+    assertThrows(SQLException.class, () -> tryConnection(invalidUrl), "Should throw an SQLException");
+  }
+
   /**
    * Helper function: try to get connection form specified url
    */