business process modelling what is a node

#Business process modelling what is a node code

Identify object flows and nodes - typically not shown EXCEPT if info captured by system in one. Node.js process model increases the performance and scalability with a few caveats. Business Process Modelling with Activity Diagrams. The following figure illustrates asynchronous web server model using Node.js. Internally, Node.js uses libev for the event loop which in turn uses internal C++ thread pool to provide asynchronous I/O. When asynchronous I/O work completes then it processes the request further and sends the response.Īn event loop is constantly watching for the events to be raised for an asynchronous job and executing callback function when the job completes. So, this single thread doesn't have to wait for the request to complete and is free to handle the next request.

All the user requests to your web application will be handled by a single thread and all the I/O work or long running job is performed asynchronously for a particular request.

#Business process modelling what is a node code

Node.js runs in a single process and the application code runs in a single thread and thereby needs less resources than other platforms. Node.js processes user requests differently when compared to a traditional web server model. Traditional Web Server Model Node.js Process Model Dedicated thread executes a particular request and does not return to thread pool until it completes the execution and returns a response. If no thread is available in the thread pool at any point of time then the request waits till the next available thread. In the traditional web server model, each request is handled by a dedicated thread from the thread pool. In this section, we will learn about the Node.js process model and understand why we should use Node.js.