New overload in invokeBinding + allow null typeref. (#1159)

Signed-off-by: Artur Souza <asouza.pro@gmail.com>

sdk/src/main/java/io/dapr/client/AbstractDaprClient.java

@@ -270,6 +270,14 @@ abstract class AbstractDaprClient implements DaprClient, DaprPreviewClient {
     return this.invokeBinding(bindingName, operation, data, metadata, TypeRef.get(clazz));
   }
 
+  /**
+   * {@inheritDoc}
+   */
+  @Override
+  public Mono<Void> invokeBinding(InvokeBindingRequest request) {
+    return this.invokeBinding(request, TypeRef.VOID);
+  }
+
   /**
    * {@inheritDoc}
    */

sdk/src/main/java/io/dapr/client/DaprClient.java

@@ -314,6 +314,14 @@ public interface DaprClient extends AutoCloseable {
   <T> Mono<T> invokeBinding(String bindingName, String operation, Object data, Map<String, String> metadata,
                             Class<T> clazz);
 
+  /**
+   * Invokes a Binding operation.
+   *
+   * @param request The binding invocation request.
+   * @return a Mono with void.
+   */
+  Mono<Void> invokeBinding(InvokeBindingRequest request);
+
   /**
    * Invokes a Binding operation.
    *

sdk/src/main/java/io/dapr/client/DaprClientImpl.java

@@ -459,8 +459,10 @@ public class DaprClientImpl extends AbstractDaprClient {
 
       try {
         CloudEvent<T> cloudEvent = new CloudEvent<>();
-        var object =
+        T object = null;
-            DaprClientImpl.this.objectSerializer.deserialize(message.getData().toByteArray(), type);
+        if (type != null) {
+          object = DaprClientImpl.this.objectSerializer.deserialize(message.getData().toByteArray(), type);
+        }
         cloudEvent.setData(object);
         cloudEvent.setDatacontenttype(message.getDataContentType());
         cloudEvent.setId(message.getId());
@@ -528,6 +530,10 @@ public class DaprClientImpl extends AbstractDaprClient {
 
   private <T> Mono<T> getMonoForHttpResponse(TypeRef<T> type, DaprHttp.Response r) {
     try {
+      if (type == null) {
+        return Mono.empty();
+      }
+
       T object = objectSerializer.deserialize(r.getBody(), type);
       if (object == null) {
         return Mono.empty();
@@ -585,6 +591,9 @@ public class DaprClientImpl extends AbstractDaprClient {
             }
 
             try {
+              if (type == null) {
+                return Mono.empty();
+              }
               return Mono.justOrEmpty(objectSerializer.deserialize(it.getData().toByteArray(), type));
             } catch (IOException e) {
               throw DaprException.propagate(e);
@@ -706,13 +715,18 @@ public class DaprClientImpl extends AbstractDaprClient {
       return new State<>(key, error);
     }
 
-    ByteString payload = item.getData();
-    byte[] data = payload == null ? null : payload.toByteArray();
-    T value = stateSerializer.deserialize(data, type);
     String etag = item.getEtag();
     if (etag.equals("")) {
       etag = null;
     }
+
+    T value = null;
+    if (type != null) {
+      ByteString payload = item.getData();
+      byte[] data = payload == null ? null : payload.toByteArray();
+      value = stateSerializer.deserialize(data, type);
+    }
+
     return new State<>(key, value, etag, item.getMetadataMap(), null);
   }
 
@@ -723,7 +737,11 @@ public class DaprClientImpl extends AbstractDaprClient {
       TypeRef<T> type) throws IOException {
     ByteString payload = response.getData();
     byte[] data = payload == null ? null : payload.toByteArray();
-    T value = stateSerializer.deserialize(data, type);
+    T value = null;
+    if (type != null) {
+      value = stateSerializer.deserialize(data, type);
+    }
+
     String etag = response.getEtag();
     if (etag.equals("")) {
       etag = null;
@@ -1108,7 +1126,11 @@ public class DaprClientImpl extends AbstractDaprClient {
     }
     ByteString payload = item.getData();
     byte[] data = payload == null ? null : payload.toByteArray();
-    T value = stateSerializer.deserialize(data, type);
+    T value = null;
+    if (type != null) {
+      value = stateSerializer.deserialize(data, type);
+    }
+
     String etag = item.getEtag();
     if (etag.equals("")) {
       etag = null;

sdk/src/test/java/io/dapr/client/DaprClientGrpcTest.java

@@ -25,6 +25,7 @@ import io.dapr.client.domain.DeleteStateRequest;
 import io.dapr.client.domain.ExecuteStateTransactionRequest;
 import io.dapr.client.domain.GetBulkStateRequest;
 import io.dapr.client.domain.GetStateRequest;
+import io.dapr.client.domain.InvokeBindingRequest;
 import io.dapr.client.domain.PublishEventRequest;
 import io.dapr.client.domain.RuleMetadata;
 import io.dapr.client.domain.State;
@@ -339,6 +340,23 @@ public class DaprClientGrpcTest {
     result.block();
   }
 
+  @Test
+  public void invokeBindingVoidReturnTest() throws IOException {
+    DaprProtos.InvokeBindingResponse.Builder responseBuilder =
+        DaprProtos.InvokeBindingResponse.newBuilder().setData(serialize("OK"));
+    doAnswer((Answer<Void>) invocation -> {
+      StreamObserver<DaprProtos.InvokeBindingResponse> observer = (StreamObserver<DaprProtos.InvokeBindingResponse>) invocation.getArguments()[1];
+      observer.onNext(responseBuilder.build());
+      observer.onCompleted();
+      return null;
+    }).when(daprStub).invokeBinding(any(DaprProtos.InvokeBindingRequest.class), any());
+
+    var request = new InvokeBindingRequest("BindingName", "MyOperation");
+    request.setData("request");
+    Mono<Void> result = client.invokeBinding(request, null);
+    result.block();
+  }
+
   @Test
   public void invokeBindingByteArrayTest() {
     DaprProtos.InvokeBindingResponse.Builder responseBuilder =