fix: Add default values to DaprClientProperties for Spring Boot apps

When starting a Spring Boot application without explicitly setting
DaprClientProperties, fields are now initialized with Dapr's standard
defaults instead of null: httpEndpoint=http://localhost,
grpcEndpoint=localhost, httpPort=3500, grpcPort=50001, apiToken=null.

Fixes #1566

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Siri Varma Vegiraju <svegiraju@Siris-MacBook-Pro.local>

Author: 2 people

dapr-spring/dapr-spring-boot-properties/src/main/java/io/dapr/spring/boot/properties/client/DaprClientProperties.java

@@ -17,10 +17,16 @@
 
 @ConfigurationProperties(prefix = "dapr.client")
 public class DaprClientProperties {
-  private String httpEndpoint;
-  private String grpcEndpoint;
-  private Integer httpPort;
-  private Integer grpcPort;
+
+  public static final String DEFAULT_HTTP_ENDPOINT = "http://localhost";
+  public static final String DEFAULT_GRPC_ENDPOINT = "localhost";
+  public static final int DEFAULT_HTTP_PORT = 3500;
+  public static final int DEFAULT_GRPC_PORT = 50001;
+
+  private String httpEndpoint = DEFAULT_HTTP_ENDPOINT;
+  private String grpcEndpoint = DEFAULT_GRPC_ENDPOINT;
+  private Integer httpPort = DEFAULT_HTTP_PORT;
+  private Integer grpcPort = DEFAULT_GRPC_PORT;
   private String apiToken;
 
   /**

dapr-spring/dapr-spring-boot-properties/src/test/java/io/dapr/spring/boot/properties/client/DaprClientPropertiesTest.java

@@ -26,6 +26,21 @@ public class DaprClientPropertiesTest {
   private final ApplicationContextRunner runner = new ApplicationContextRunner()
       .withUserConfiguration(EnableDaprClientProperties.class);
 
+  @Test
+  @DisplayName("Should have correct default values when using no-arg constructor")
+  public void shouldHaveCorrectDefaults() {
+
+    DaprClientProperties properties = new DaprClientProperties();
+
+    SoftAssertions.assertSoftly(softly -> {
+      softly.assertThat(properties.getHttpEndpoint()).isEqualTo("http://localhost");
+      softly.assertThat(properties.getGrpcEndpoint()).isEqualTo("localhost");
+      softly.assertThat(properties.getHttpPort()).isEqualTo(3500);
+      softly.assertThat(properties.getGrpcPort()).isEqualTo(50001);
+      softly.assertThat(properties.getApiToken()).isNull();
+    });
+  }
+
   @Test
   @DisplayName("Should create DaprClientProperties correctly through constructor")
   public void shouldCreateDaprClientPropertiesCorrectly() {
@@ -49,21 +64,36 @@ public void shouldSetDaprClientPropertiesCorrectly() {
 
     DaprClientProperties properties = new DaprClientProperties();
 
-    properties.setGrpcEndpoint("localhost");
-    properties.setGrpcPort(50001);
-    properties.setHttpEndpoint("http://localhost");
-    properties.setHttpPort(3500);
+    properties.setGrpcEndpoint("custom-host");
+    properties.setGrpcPort(60001);
+    properties.setHttpEndpoint("http://custom-host");
+    properties.setHttpPort(4500);
     properties.setApiToken("ABC");
 
     SoftAssertions.assertSoftly(softAssertions -> {
-      softAssertions.assertThat(properties.getGrpcEndpoint()).isEqualTo("localhost");
-      softAssertions.assertThat(properties.getHttpEndpoint()).isEqualTo("http://localhost");
-      softAssertions.assertThat(properties.getHttpPort()).isEqualTo(3500);
-      softAssertions.assertThat(properties.getGrpcPort()).isEqualTo(50001);
+      softAssertions.assertThat(properties.getGrpcEndpoint()).isEqualTo("custom-host");
+      softAssertions.assertThat(properties.getHttpEndpoint()).isEqualTo("http://custom-host");
+      softAssertions.assertThat(properties.getHttpPort()).isEqualTo(4500);
+      softAssertions.assertThat(properties.getGrpcPort()).isEqualTo(60001);
       softAssertions.assertThat(properties.getApiToken()).isEqualTo("ABC");
     });
   }
 
+  @Test
+  @DisplayName("Should have correct defaults when no properties are configured")
+  public void shouldHaveDefaultsWhenNoPropertiesConfigured() {
+    runner.run(context -> {
+      DaprClientProperties properties = context.getBean(DaprClientProperties.class);
+      SoftAssertions.assertSoftly(softly -> {
+        softly.assertThat(properties.getHttpEndpoint()).isEqualTo("http://localhost");
+        softly.assertThat(properties.getGrpcEndpoint()).isEqualTo("localhost");
+        softly.assertThat(properties.getHttpPort()).isEqualTo(3500);
+        softly.assertThat(properties.getGrpcPort()).isEqualTo(50001);
+        softly.assertThat(properties.getApiToken()).isNull();
+      });
+    });
+  }
+
   @Test
   @DisplayName("Should map DaprClient properties correctly")
   public void shouldMapDaprClientProperties() {