SaveAsSync?

[kpetrow]

I needed to implement a SaveAsSync due to using a jbin in a module that couldn't work well with a call back. I can add a PR to implement a SaveAsSync if any interest.

return proto.saveAsSync = promising(function(dest, mimeType, callback) {
       if ("string" == typeof dest) {
           var buffer = this.read("blob", 0);
           is(buffer, Buffer) || (buffer = new Buffer(buffer)), require("fs").writeFileSync(dest, buffer);
       } else callback(new TypeError("Unsupported storage type."));
   }), jBinary;

[RReverser]

It won't be portable across platforms. Why do you need it though? You can just not pass any callback if you prefer to, it will save file nevertheless.

[kpetrow]

I load in a point cloud(60-200MB binary final of int16's). Then query ~10 million position and apply the positions to the point cloud. The positions come in a stream from mysql server. Then at certain intervals write out the point cloud. I need to stop the mysql stream in order to output the file if being written async to ensure the point cloud isnt modified during output. When sync i can maintain the stream synchronously. I can do a pause in the stream, then pass in call back to resume when outputs the last file, but I think its really messed compared to sync write and doesnt save any time since I need to pause the database stream.

  CONNECTION_POOL = mysql.createConnection({
     connectionLimit: 10,
     host: server_name,
     user: user_name,
     password: password,
     database: schema,
     connectTimeout: 99999999999,
     multipleStatements: true,
     .........
     ..........
 });
 var myObjects, myObject = {};
 myObject.header = module.loadUsingJBin_and_other_stuff('up_to_200MbBinaryFile');
 myObject.myMassiveArray = module.loadUsingArrayBuffer_and_other_stuff('up_to_200MbBinaryFile');

 var positionStream = CONNECTION_POOL.query(myQuery)
 positionStream.on('result', function(currentPositionRow) {
     // this includes spawning multiple myObject's all with their own myMassiveArray
     myObjects = doStuff(myObject, currentPositionRow);

     // if time is write we need to output all the point clouds made
     if (currentPositionRow.time > outputTime && previousPositionRow.time < outputTime) {
         // We could add a puase here
         //CONNECTION_POOL.Pause();
         for (var i = 1; i < myObjects.length; i++) {
             // Conenction pool is paused, do i really want to deal with callback hell for async file write ?
             // callBack = (last) ? function (CONNECTION_POOL) { CONNECTION_POOL.Pause() } : 'NOT_TIME';
             module.WriteUsingJBin(outputTime, myObjects[i] /*, callBack*/ );
         }
     }
 })

I have tried cloning off the object to write but I get memory overflow, because the database stream and math is way faster then the write and garbage collection. Open for any suggestions.