Why we do not have constructor in servlet?

Why we do not have constructor in servlet?

Servlet implementation classes can have constructor but they should be using init() method to initialize Servlet because of two reasons, first you cannot declare constructors on interface in Java, which means you cannot enforce this requirement to any class which implements Servlet interface and second, Servlet require …

Do we have a constructor in servlet?

Yes definitely we can have a constructor inside the servlet but the only one disadvantage when we define a Constructor servlet cannot get the initial parameters and hence we use init() method to initialize a servlet.

Why do we need a constructor in a servlet if we use the init method?

This is the reason we need init() method. The constructor is not part of the servlet lifecycle. So, in order to provide a new servlet any information about itself and its environment, a server had to call a servlet’s init() method and pass along an object that implements the ServletConfig interface.

Who is responsible for writing a constructor in servlet?

Who is responsible for writing a constructor? Container is responsible for writing constructor without arguments in servlet. 44.

Is servlet a singleton?

A Servlet is not a singleton class. But it is a informal specification( without any restriction on Servlet class by making it singleton) that the Servlet container must use only one instance per Servlet declaration.

How many servlet instances are created for multiple requests?

How many servlet instances are created when multiple requests arrive simultaneously? Only one instance will be created for every servlet. Generally servlet instantiation is done by the container.

How many requests can a servlet handle?

a) The Servlet container creates one object of that Servlet class. b) Servlet container starts 4 threads on that object representing 4 requests on per request basis. c) Servlet container creates 4 sets of request, response objects on one set per each request. (if any change is occur recompile, reload.)

How many servlet object is created?

1) How many objects of a servlet is created? Only one object at the time of first request by servlet or web container.

How does REST API handle multiple requests client?

Handling Concurrent Requests in a RESTful API

1. User A requests resource 1 via a GET endpoint.
2. User B requests resource 1 via a GET endpoint.
3. User A makes changes on resource 1 and saves its changes via a PUT request.
4. User B makes changes on resource 1, on the same fields as user A, and saves its changes via a PUT request.

How do you handle a large response in REST API?

Delivering Large API Responses As Efficiently As Possible

1. Reduce Size Pagination.
2. Organizing Using Hypermedia.
3. Exactly What They Need With Schema Filtering.
4. Defining Specific Responses Using The Prefer Header.
5. Using Caching To Make Response More Efficient.
6. More Efficiency Through Compression.

How many API calls is too many?

These plans can vary depending on a particular API or a user’s current service plan. But in most cases our servers will reject API requests from a particular application if the request rate exceeds 30 API requests per minute. In this case the client will get an HTTP error with status code 429 “too many requests”.