diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/stub/GrpcWorkflowTemplateServiceStub.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/stub/GrpcWorkflowTemplateServiceStub.java
index 5097a73e8e0f..f38098de40e5 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/stub/GrpcWorkflowTemplateServiceStub.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/stub/GrpcWorkflowTemplateServiceStub.java
@@ -24,6 +24,7 @@
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
 import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1.CreateWorkflowTemplateRequest;
 import com.google.cloud.dataproc.v1.DeleteWorkflowTemplateRequest;
@@ -35,12 +36,14 @@
 import com.google.cloud.dataproc.v1.UpdateWorkflowTemplateRequest;
 import com.google.cloud.dataproc.v1.WorkflowMetadata;
 import com.google.cloud.dataproc.v1.WorkflowTemplate;
+import com.google.common.collect.ImmutableMap;
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.GrpcOperationsStub;
 import com.google.protobuf.Empty;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -197,36 +200,102 @@ protected GrpcWorkflowTemplateServiceStub(
         createWorkflowTemplateTransportSettings =
             GrpcCallSettings.<CreateWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(createWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<CreateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(CreateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<GetWorkflowTemplateRequest, WorkflowTemplate>
         getWorkflowTemplateTransportSettings =
             GrpcCallSettings.<GetWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(getWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<GetWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(GetWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("name", String.valueOf(request.getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<InstantiateWorkflowTemplateRequest, Operation>
         instantiateWorkflowTemplateTransportSettings =
             GrpcCallSettings.<InstantiateWorkflowTemplateRequest, Operation>newBuilder()
                 .setMethodDescriptor(instantiateWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<InstantiateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(
+                          InstantiateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("name", String.valueOf(request.getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<InstantiateInlineWorkflowTemplateRequest, Operation>
         instantiateInlineWorkflowTemplateTransportSettings =
             GrpcCallSettings.<InstantiateInlineWorkflowTemplateRequest, Operation>newBuilder()
                 .setMethodDescriptor(instantiateInlineWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<InstantiateInlineWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(
+                          InstantiateInlineWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<UpdateWorkflowTemplateRequest, WorkflowTemplate>
         updateWorkflowTemplateTransportSettings =
             GrpcCallSettings.<UpdateWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(updateWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<UpdateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(UpdateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put(
+                            "template.name", String.valueOf(request.getTemplate().getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<ListWorkflowTemplatesRequest, ListWorkflowTemplatesResponse>
         listWorkflowTemplatesTransportSettings =
             GrpcCallSettings
                 .<ListWorkflowTemplatesRequest, ListWorkflowTemplatesResponse>newBuilder()
                 .setMethodDescriptor(listWorkflowTemplatesMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<ListWorkflowTemplatesRequest>() {
+                      @Override
+                      public Map<String, String> extract(ListWorkflowTemplatesRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<DeleteWorkflowTemplateRequest, Empty> deleteWorkflowTemplateTransportSettings =
         GrpcCallSettings.<DeleteWorkflowTemplateRequest, Empty>newBuilder()
             .setMethodDescriptor(deleteWorkflowTemplateMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<DeleteWorkflowTemplateRequest>() {
+                  @Override
+                  public Map<String, String> extract(DeleteWorkflowTemplateRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("name", String.valueOf(request.getName()));
+                    return params.build();
+                  }
+                })
             .build();
 
     this.createWorkflowTemplateCallable =
diff --git a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/stub/GrpcWorkflowTemplateServiceStub.java b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/stub/GrpcWorkflowTemplateServiceStub.java
index b6b5bea2c846..e4072948a8ac 100644
--- a/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/stub/GrpcWorkflowTemplateServiceStub.java
+++ b/google-cloud-clients/google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1beta2/stub/GrpcWorkflowTemplateServiceStub.java
@@ -24,6 +24,7 @@
 import com.google.api.gax.grpc.GrpcStubCallableFactory;
 import com.google.api.gax.rpc.ClientContext;
 import com.google.api.gax.rpc.OperationCallable;
+import com.google.api.gax.rpc.RequestParamsExtractor;
 import com.google.api.gax.rpc.UnaryCallable;
 import com.google.cloud.dataproc.v1beta2.CreateWorkflowTemplateRequest;
 import com.google.cloud.dataproc.v1beta2.DeleteWorkflowTemplateRequest;
@@ -35,12 +36,14 @@
 import com.google.cloud.dataproc.v1beta2.UpdateWorkflowTemplateRequest;
 import com.google.cloud.dataproc.v1beta2.WorkflowMetadata;
 import com.google.cloud.dataproc.v1beta2.WorkflowTemplate;
+import com.google.common.collect.ImmutableMap;
 import com.google.longrunning.Operation;
 import com.google.longrunning.stub.GrpcOperationsStub;
 import com.google.protobuf.Empty;
 import io.grpc.MethodDescriptor;
 import io.grpc.protobuf.ProtoUtils;
 import java.io.IOException;
+import java.util.Map;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Generated;
 
@@ -197,36 +200,102 @@ protected GrpcWorkflowTemplateServiceStub(
         createWorkflowTemplateTransportSettings =
             GrpcCallSettings.<CreateWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(createWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<CreateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(CreateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<GetWorkflowTemplateRequest, WorkflowTemplate>
         getWorkflowTemplateTransportSettings =
             GrpcCallSettings.<GetWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(getWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<GetWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(GetWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("name", String.valueOf(request.getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<InstantiateWorkflowTemplateRequest, Operation>
         instantiateWorkflowTemplateTransportSettings =
             GrpcCallSettings.<InstantiateWorkflowTemplateRequest, Operation>newBuilder()
                 .setMethodDescriptor(instantiateWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<InstantiateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(
+                          InstantiateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("name", String.valueOf(request.getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<InstantiateInlineWorkflowTemplateRequest, Operation>
         instantiateInlineWorkflowTemplateTransportSettings =
             GrpcCallSettings.<InstantiateInlineWorkflowTemplateRequest, Operation>newBuilder()
                 .setMethodDescriptor(instantiateInlineWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<InstantiateInlineWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(
+                          InstantiateInlineWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<UpdateWorkflowTemplateRequest, WorkflowTemplate>
         updateWorkflowTemplateTransportSettings =
             GrpcCallSettings.<UpdateWorkflowTemplateRequest, WorkflowTemplate>newBuilder()
                 .setMethodDescriptor(updateWorkflowTemplateMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<UpdateWorkflowTemplateRequest>() {
+                      @Override
+                      public Map<String, String> extract(UpdateWorkflowTemplateRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put(
+                            "template.name", String.valueOf(request.getTemplate().getName()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<ListWorkflowTemplatesRequest, ListWorkflowTemplatesResponse>
         listWorkflowTemplatesTransportSettings =
             GrpcCallSettings
                 .<ListWorkflowTemplatesRequest, ListWorkflowTemplatesResponse>newBuilder()
                 .setMethodDescriptor(listWorkflowTemplatesMethodDescriptor)
+                .setParamsExtractor(
+                    new RequestParamsExtractor<ListWorkflowTemplatesRequest>() {
+                      @Override
+                      public Map<String, String> extract(ListWorkflowTemplatesRequest request) {
+                        ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                        params.put("parent", String.valueOf(request.getParent()));
+                        return params.build();
+                      }
+                    })
                 .build();
     GrpcCallSettings<DeleteWorkflowTemplateRequest, Empty> deleteWorkflowTemplateTransportSettings =
         GrpcCallSettings.<DeleteWorkflowTemplateRequest, Empty>newBuilder()
             .setMethodDescriptor(deleteWorkflowTemplateMethodDescriptor)
+            .setParamsExtractor(
+                new RequestParamsExtractor<DeleteWorkflowTemplateRequest>() {
+                  @Override
+                  public Map<String, String> extract(DeleteWorkflowTemplateRequest request) {
+                    ImmutableMap.Builder<String, String> params = ImmutableMap.builder();
+                    params.put("name", String.valueOf(request.getName()));
+                    return params.build();
+                  }
+                })
             .build();
 
     this.createWorkflowTemplateCallable =
diff --git a/google-cloud-clients/google-cloud-dataproc/synth.metadata b/google-cloud-clients/google-cloud-dataproc/synth.metadata
index 451bf17b8513..615106587195 100644
--- a/google-cloud-clients/google-cloud-dataproc/synth.metadata
+++ b/google-cloud-clients/google-cloud-dataproc/synth.metadata
@@ -1,19 +1,19 @@
 {
-  "updateTime": "2019-03-06T08:39:37.112446Z",
+  "updateTime": "2019-03-28T07:40:42.469988Z",
   "sources": [
     {
       "generator": {
         "name": "artman",
-        "version": "0.16.15",
-        "dockerImage": "googleapis/artman@sha256:9caadfa59d48224cba5f3217eb9d61a155b78ccf31e628abef385bc5b7ed3bd2"
+        "version": "0.16.20",
+        "dockerImage": "googleapis/artman@sha256:e3c054a2fb85a12481c722af616c7fb6f1d02d862248385eecbec3e4240ebd1e"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "856117505ff9075b3e9c0b5674113667b6cf9e00",
-        "internalRef": "236931378"
+        "sha": "6a84b3267b0a95e922608b9891219075047eee29",
+        "internalRef": "240640999"
       }
     }
   ],