add GetWorkflowExecutionResult as a system nexus endpoint

Makefile

@@ -64,6 +64,7 @@ http-api-docs:
 		--openapiv2_out=openapi \
         --openapiv2_opt=allow_merge=true,merge_file_name=openapiv2,simple_operation_ids=true \
 		temporal/api/workflowservice/v1/* \
+		temporal/api/applicationservice/v1/* \
 		temporal/api/operatorservice/v1/*
 
 	jq --rawfile desc $(OAPI_OUT)/payload_description.txt < $(OAPI_OUT)/openapiv2.swagger.json '.definitions.v1Payload={description: $$desc}' > $(OAPI_OUT)/v2.tmp
@@ -131,6 +132,7 @@ nexus-rpc-yaml: nexus-rpc-yaml-install
 		--nexus-rpc-yaml_opt=include_operation_tags=exposed \
 		--nexus-rpc-yaml_out=. \
 		temporal/api/workflowservice/v1/* \
+		temporal/api/applicationservice/v1/* \
 		temporal/api/operatorservice/v1/*
 
 nexus-rpc-yaml-install:

api-linter.yaml

@@ -42,6 +42,7 @@
 
 - included_paths:
     - "**/workflowservice/v1/service.proto"
+    - "**/applicationservice/v1/service.proto"
     - "**/operatorservice/v1/service.proto"
   disabled_rules:
     - "core::0127::resource-name-extraction" # We extract specific fields in URL since the gRPC API predates the HTTP API -- https://linter.aip.dev/127/resource-name-extraction

nexus/temporal-proto-models-nexusrpc.yaml

@@ -17,3 +17,20 @@ services:
           $pythonRef: temporalio.api.workflowservice.v1.SignalWithStartWorkflowExecutionResponse
           $rubyRef: Temporalio::Api::WorkflowService::V1::SignalWithStartWorkflowExecutionResponse
           $typescriptRef: '@temporalio/api/workflowservice/v1.SignalWithStartWorkflowExecutionResponse'
+  temporal.api.applicationservice.v1.ApplicationService:
+    operations:
+      GetWorkflowExecutionResult:
+        input:
+          $dotnetRef: Temporalio.Api.Applicationservice.V1.GetWorkflowExecutionResultRequest
+          $goRef: go.temporal.io/api/applicationservice/v1.GetWorkflowExecutionResultRequest
+          $javaRef: io.temporal.api.applicationservice.v1.GetWorkflowExecutionResultRequest
+          $pythonRef: temporalio.api.applicationservice.v1.GetWorkflowExecutionResultRequest
+          $rubyRef: Temporalio::Api::Applicationservice::V1::GetWorkflowExecutionResultRequest
+          $typescriptRef: '@temporalio/api/applicationservice/v1.GetWorkflowExecutionResultRequest'
+        output:
+          $dotnetRef: Temporalio.Api.Applicationservice.V1.GetWorkflowExecutionResultResponse
+          $goRef: go.temporal.io/api/applicationservice/v1.GetWorkflowExecutionResultResponse
+          $javaRef: io.temporal.api.applicationservice.v1.GetWorkflowExecutionResultResponse
+          $pythonRef: temporalio.api.applicationservice.v1.GetWorkflowExecutionResultResponse
+          $rubyRef: Temporalio::Api::Applicationservice::V1::GetWorkflowExecutionResultResponse
+          $typescriptRef: '@temporalio/api/applicationservice/v1.GetWorkflowExecutionResultResponse'

openapi/openapiv2.json

@@ -8,6 +8,9 @@
     {
       "name": "WorkflowService"
     },
+    {
+      "name": "ApplicationService"
+    },
     {
       "name": "OperatorService"
     }

temporal/api/applicationservice/v1/request_response.proto

@@ -0,0 +1,31 @@
+syntax = "proto3";
+
+package temporal.api.applicationservice.v1;
+
+option go_package = "go.temporal.io/api/applicationservice/v1;applicationservice";
+option java_package = "io.temporal.api.applicationservice.v1";
+option java_multiple_files = true;
+option java_outer_classname = "RequestResponseProto";
+option ruby_package = "Temporalio::Api::Applicationservice::V1";
+option csharp_namespace = "Temporalio.Api.Applicationservice.V1";
+
+import "temporal/api/common/v1/message.proto";
+import "temporal/api/failure/v1/message.proto";
+
+// (-- api-linter: core::0131::request-name-required=disabled --)
+// (-- api-linter: core::0131::request-unknown-fields=disabled --)
+message GetWorkflowExecutionResultRequest {
+    // The workflow execution to wait for. This is always the latest workflow run for the given workflow ID.
+    // RunID is not required and will be ignored if provided.
+    temporal.api.common.v1.WorkflowExecution execution = 1;
+}
+
+
+message GetWorkflowExecutionResultResponse {
+    // If the workflow execution being waited on completed successfully, the result will be set. If it failed, the failure will be set.
+    // If the workflow execution is still running, neither field will be set.
+    oneof completion_status {
+        temporal.api.common.v1.Payload  result  = 1;
+        temporal.api.failure.v1.Failure failure = 2;
+    }
+}

temporal/api/applicationservice/v1/service.proto

@@ -0,0 +1,38 @@
+syntax = "proto3";
+
+package temporal.api.applicationservice.v1;
+
+option go_package = "go.temporal.io/api/applicationservice/v1;applicationservice";
+option java_package = "io.temporal.api.applicationservice.v1";
+option java_multiple_files = true;
+option java_outer_classname = "ServiceProto";
+option ruby_package = "Temporalio::Api::Applicationservice::V1";
+option csharp_namespace = "Temporalio.Api.Applicationservice.V1";
+
+import "nexusannotations/v1/options.proto";
+import "temporal/api/applicationservice/v1/request_response.proto";
+
+// ApplicationService API defines how Temporal SDKs and other clients interact with the Temporal server.
+service ApplicationService {
+    // GetWorkflowExecutionResult asynchronously waits for an external workflow to complete.
+    //
+    // (-- api-linter: core::0136::prepositions=disabled
+    //     aip.dev/not-precedent: GetWorkflowExecutionResult is the established name for this operation. --)
+    // (-- api-linter: core::0131::http-body=disabled
+    //     aip.dev/not-precedent: This is an async long-poll, not a standard Get; it carries a request body. --)
+    // (-- api-linter: core::0131::http-method=disabled
+    //     aip.dev/not-precedent: POST is used to allow a request body for the long-poll wait. --)
+    // (-- api-linter: core::0131::http-uri-name=disabled
+    //     aip.dev/not-precedent: Uses a custom verb path for the wait operation. --)
+    // (-- api-linter: core::0131::method-signature=disabled
+    //     aip.dev/not-precedent: Request has no `name` field; identifies the workflow by namespace + execution. --)
+    // (-- api-linter: core::0131::response-message-name=disabled
+    //     aip.dev/not-precedent: Returns a dedicated response message, not the workflow resource itself. --)
+    // (-- api-linter: core::0127::resource-name-extraction=disabled
+    //     aip.dev/not-precedent: Path variables use existing workflow_id field, not AIP-122 resource names. --)
+    // (-- api-linter: core::0127::http-annotation=disabled
+    //     aip.dev/not-precedent: Not exposed over HTTP; this is a Nexus-only operation. --)
+  rpc GetWorkflowExecutionResult (GetWorkflowExecutionResultRequest) returns (GetWorkflowExecutionResultResponse) {
+    option (nexusannotations.v1.operation).tags = "exposed";
+  }
+}