Refactor wasm bindings to use consistent interface names as in native (#195)

* Refactored wasm bindings code
 - Replaced TranslationModel, TranslationRequest and TranslationResult
    with Service, ResponseOptions and Response
 - Corresponding documentation changes
 - Names of the bindings files changed
 - Moved Vector<Response> definition in Response specific bindings
   file

src/translator/service.h

@@ -105,7 +105,7 @@ class Service {
   /// recommended to work with futures and translate() API.
   ///
   /// @param [in] source: rvalue reference of the string to be translated
-  /// @param [in] translationRequest: ResponseOptions indicating whether or not
+  /// @param [in] responseOptions: ResponseOptions indicating whether or not
   /// to include some member in the Response, also specify any additional
   /// configurable parameters.
   std::vector<Response> translateMultiple(std::vector<std::string> &&source, ResponseOptions responseOptions);

wasm/CMakeLists.txt

@@ -1,7 +1,7 @@
 add_executable(bergamot-translator-worker
-    bindings/TranslationModelBindings.cpp
-    bindings/TranslationRequestBindings.cpp
-    bindings/TranslationResultBindings.cpp
+    bindings/service_bindings.cpp
+    bindings/response_options_bindings.cpp
+    bindings/response_bindings.cpp
 )
 
 # Generate version file that can be included in the wasm artifacts

wasm/README.md

@@ -63,27 +63,27 @@ var alignedShortlistMemory = constructAlignedMemoryFromBuffer(shortListBuffer, 6
 var alignedVocabsMemoryList = new Module.AlignedMemoryList;
 downloadedVocabBuffers.forEach(item => alignedVocabsMemoryList.push_back(constructAlignedMemoryFromBuffer(item, 64)));
 
-// Instantiate the TranslationModel
-const model = new Module.TranslationModel(modelConfig, alignedModelMemory, alignedShortlistMemory, alignedVocabsMemoryList);
+// Instantiate the Translation Service
+const translationService = new Module.Service(modelConfig, alignedModelMemory, alignedShortlistMemory, alignedVocabsMemoryList);
 
-// Instantiate the arguments of translate() API i.e. TranslationRequest and input (vector<string>)
-const request = new Module.TranslationRequest();
+// Instantiate the arguments of translate() API i.e. ResponseOptions and input (vector<string>)
+const responseOptions = new Module.ResponseOptions();
 const input = new Module.VectorString;
 
 // Initialize the input
 input.push_back("Hola"); input.push_back("Mundo");
 
-// translate the input; the result is a vector<TranslationResult>
-const result = model.translate(input, request);
+// translate the input; the result is a vector<Response>
+const result = translationService.translate(input, responseOptions);
 
-// Print original and translated text from each entry of vector<TranslationResult>
+// Print original and translated text from each entry of vector<Response>
 for (let i = 0; i < result.size(); i++) {
     console.log(' original=' + result.get(i).getOriginalText() + ', translation=' + result.get(i).getTranslatedText());
 }
 
 // Don't forget to clean up the instances
-model.delete();
-request.delete();
+translationService.delete();
+responseOptions.delete();
 input.delete();
 ```
 

wasm/bindings/TranslationRequestBindings.cpp

@@ -1,15 +0,0 @@
-/*
- * Bindings for TranslationRequest class
- *
- */
-
-#include <emscripten/bind.h>
-
-#include "response_options.h"
-
-typedef marian::bergamot::ResponseOptions TranslationRequest;
-
-using namespace emscripten;
-
-// Binding code
-EMSCRIPTEN_BINDINGS(translation_request) { class_<TranslationRequest>("TranslationRequest").constructor<>(); }

wasm/bindings/TranslationResultBindings.cpp

@@ -1,22 +0,0 @@
-/*
- * Bindings for TranslationResult class
- *
- */
-
-#include <emscripten/bind.h>
-
-#include <vector>
-
-#include "response.h"
-
-typedef marian::bergamot::Response TranslationResult;
-
-using namespace emscripten;
-
-// Binding code
-EMSCRIPTEN_BINDINGS(translation_result) {
-  class_<TranslationResult>("TranslationResult")
-      .constructor<>()
-      .function("getOriginalText", &TranslationResult::getOriginalText)
-      .function("getTranslatedText", &TranslationResult::getTranslatedText);
-}

wasm/bindings/response_bindings.cpp

@@ -0,0 +1,24 @@
+/*
+ * Bindings for Response class
+ *
+ */
+
+#include <emscripten/bind.h>
+
+#include <vector>
+
+#include "response.h"
+
+typedef marian::bergamot::Response Response;
+
+using namespace emscripten;
+
+// Binding code
+EMSCRIPTEN_BINDINGS(response) {
+  class_<Response>("Response")
+      .constructor<>()
+      .function("getOriginalText", &Response::getOriginalText)
+      .function("getTranslatedText", &Response::getTranslatedText);
+
+  register_vector<Response>("VectorResponse");
+}

wasm/bindings/response_options_bindings.cpp

@@ -0,0 +1,15 @@
+/*
+ * Bindings for ResponseOptions class
+ *
+ */
+
+#include <emscripten/bind.h>
+
+#include "response_options.h"
+
+typedef marian::bergamot::ResponseOptions ResponseOptions;
+
+using namespace emscripten;
+
+// Binding code
+EMSCRIPTEN_BINDINGS(response_options) { class_<ResponseOptions>("ResponseOptions").constructor<>(); }

wasm/bindings/service_bindings.cpp

@@ -1,18 +1,14 @@
 /*
- * TranslationModelBindings.cpp
- *
- * Bindings for TranslationModel class
+ * Bindings for Service class
  */
 
 #include <emscripten/bind.h>
 
-#include "response.h"
 #include "service.h"
 
 using namespace emscripten;
 
-typedef marian::bergamot::Service TranslationModel;
-typedef marian::bergamot::Response TranslationResult;
+typedef marian::bergamot::Service Service;
 typedef marian::bergamot::AlignedMemory AlignedMemory;
 
 val getByteArrayView(AlignedMemory& alignedMemory) {
@@ -29,7 +25,7 @@ EMSCRIPTEN_BINDINGS(aligned_memory) {
 }
 
 // When source and target vocab files are same, only one memory object is passed from JS to
-// avoid allocating memory twice for the same file. However, the constructor of the TranslationModel
+// avoid allocating memory twice for the same file. However, the constructor of the Service
 // class still expects 2 entries in this case, where each entry has the shared ownership of the
 // same AlignedMemory object. This function prepares these smart pointer based AlignedMemory objects
 // for unique AlignedMemory objects passed from JS.
@@ -56,21 +52,18 @@ marian::bergamot::MemoryBundle prepareMemoryBundle(AlignedMemory* modelMemory, A
   return memoryBundle;
 }
 
-TranslationModel* TranslationModelFactory(const std::string& config, AlignedMemory* modelMemory,
-                                          AlignedMemory* shortlistMemory,
-                                          std::vector<AlignedMemory*> uniqueVocabsMemories) {
-  return new TranslationModel(config,
-                              std::move(prepareMemoryBundle(modelMemory, shortlistMemory, uniqueVocabsMemories)));
+Service* ServiceFactory(const std::string& config, AlignedMemory* modelMemory, AlignedMemory* shortlistMemory,
+                        std::vector<AlignedMemory*> uniqueVocabsMemories) {
+  return new Service(config, std::move(prepareMemoryBundle(modelMemory, shortlistMemory, uniqueVocabsMemories)));
 }
 
-EMSCRIPTEN_BINDINGS(translation_model) {
-  class_<TranslationModel>("TranslationModel")
-      .constructor(&TranslationModelFactory, allow_raw_pointers())
-      .function("translate", &TranslationModel::translateMultiple)
-      .function("isAlignmentSupported", &TranslationModel::isAlignmentSupported);
+EMSCRIPTEN_BINDINGS(translation_service) {
+  class_<Service>("Service")
+      .constructor(&ServiceFactory, allow_raw_pointers())
+      .function("translate", &Service::translateMultiple)
+      .function("isAlignmentSupported", &Service::isAlignmentSupported);
   // ^ We redirect Service::translateMultiple to WASMBound::translate instead. Sane API is
   // translate. If and when async comes, we can be done with this inconsistency.
 
   register_vector<std::string>("VectorString");
-  register_vector<TranslationResult>("VectorTranslationResult");
 }

wasm/test_page/bergamot.html

@@ -80,8 +80,8 @@ En consecuencia, durante el año 2011 se introdujeron 180 proyectos de ley que r
     return alignedMemory;
   }
 
-  var translationModel, request, input = undefined;
-  const constructTranslationModel = async (from, to) => {
+  var translationService, responseOptions, input = undefined;
+  const constructTranslationService = async (from, to) => {
 
     const languagePair = `${from}${to}`;
 
@@ -162,10 +162,10 @@ gemm-precision: int8shift
       var alignedVocabsMemoryList = new Module.AlignedMemoryList;
       downloadedVocabBuffers.forEach(item => alignedVocabsMemoryList.push_back(constructAlignedMemoryFromBuffer(item, 64)));
 
-      // Instantiate the TranslationModel
-      if (translationModel) translationModel.delete();
-      console.debug("Creating TranslationModel with config:", modelConfig);
-      translationModel = new Module.TranslationModel(modelConfig, alignedModelMemory, alignedShortlistMemory, alignedVocabsMemoryList);
+      // Instantiate the Translation Service
+      if (translationService) translationService.delete();
+      console.debug("Creating Translation Service with config:", modelConfig);
+      translationService = new Module.Service(modelConfig, alignedModelMemory, alignedShortlistMemory, alignedVocabsMemoryList);
     } catch (error) {
       log(error);
     }
@@ -173,8 +173,8 @@ gemm-precision: int8shift
 
   const translate = (paragraphs) => {
 
-    // Instantiate the arguments of translate() API i.e. TranslationRequest and input (vector<string>)
-    var request = new Module.TranslationRequest();
+    // Instantiate the arguments of translate() API i.e. ResponseOptions and input (vector<string>)
+    var responseOptions = new Module.ResponseOptions();
     let input = new Module.VectorString;
 
     // Initialize the input
@@ -188,14 +188,14 @@ gemm-precision: int8shift
     // Access input (just for debugging)
     console.log('Input size=', input.size());
 
-    // Translate the input; the result is a vector<TranslationResult>
-    let result = translationModel.translate(input, request);
+    // Translate the input; the result is a vector<Response>
+    let result = translationService.translate(input, responseOptions);
     const translatedParagraphs = [];
     for (let i = 0; i < result.size(); i++) {
       translatedParagraphs.push(result.get(i).getTranslatedText());
     }
     console.log({ translatedParagraphs });
-    request.delete();
+    responseOptions.delete();
     input.delete();
     return translatedParagraphs;
   }
@@ -206,10 +206,10 @@ gemm-precision: int8shift
     const from = lang.substring(0, 2);
     const to = lang.substring(2, 4);
     let start = Date.now();
-    await constructTranslationModel(from, to);
-    log(`translation model ${from}${to} construction took ${(Date.now() - start) / 1000} secs`);
+    await constructTranslationService(from, to);
+    log(`translation service ${from}${to} construction took ${(Date.now() - start) / 1000} secs`);
     document.querySelector("#load").disabled = false;
-    //log('Model Alignment:', translationModel.isAlignmentSupported());
+    //log('Model Alignment:', translationService.isAlignmentSupported());
   });
 
   const translateCall = () => {