Hi JJ, Sorry for the lag first of all and thanks for the hint. I'll try it in a way that I do as much as I can on js side in a wrapper class in which each c++ method has its js counterpart. That way I can just get the wrapper's js instance via emscripten::val and call the js counterpart methods from the c++ ones. I hope it'll fit the bill.
Best regards, r0ller 2016. október 10., hétfő 20:24:35 UTC+2 időpontban jj a következőt írta: > > These types of activities are best done directly in JS side, with e.g. a > --js-library myMongoLibrary.js integration, rather than attempting to adapt > each JS code line to be called from C++ (in a JNI-style fashion). The JS > libraries allow storing both state and functions on JS side, which makes it > easier to store database objects and other things that don't need to be > marshalled over to C++ side, but can be pointed to via using some kind of > custom opaque handle. See the Emscripten src/library_xxx.js files for > example usage, they use this facility. > > 2016-10-10 17:24 GMT+03:00 <r0l...@freemail.hu <javascript:>>: > >> Hi All, >> >> I'm trying to instantiate a mongodb client and open it via >> emscripten::val but I'm already stuck at the beginning:( What I'm trying >> achieve first, is step 3 of this mongodb doc: >> https://docs.mongodb.com/getting-started/node/client/ which is this js >> oneliner: "var MongoClient = require('mongodb').MongoClient;" >> >> In the consturctor of my c++ class I have: >> >> js_db::js_db(){ >> emscripten::val require = emscripten::val::global("require"); >> emscripten::val mongoModule = require(std::string("mongodb")); >> emscripten::val mongoClient = mongoModule.MongoClient(); >> //TODO: register objIDs in global objectTracker table; >> } >> >> The error I get is: "no member named 'MongoClient' in 'emscripten::val' >> ". What am I doing wrong? Why don't I get it in case of mongoModule? >> >> What I'd like to achieve then, based on this earlier suggestion of this >> group ( >> https://groups.google.com/d/msg/emscripten-discuss/7-i5pRK7edQ/-MrCNVAuCAAJ >> ) is to call mongoClient.connect() like: >> >> void js_db::open(const std::string& db_uri){ >> this->db_uri=db_uri; >> EM_ASM_({ >> var db_uri = Module.Pointer_stringify($0); >> var mongoClient = objectTracker[$1]; >> //TODO: MongoClient.connect(db_uri, function(err, db) >> },db_uri.c_str(),mongoClientObjId); >> } >> >> Thanks for any help in advance! >> >> Best regards, >> r0ller >> >> -- You received this message because you are subscribed to the Google Groups "emscripten-discuss" group. To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
