Trending Tech Topics

What is Mongo DB MongoDB is an open-source document database and leading NoSQL database. MongoDB is written in C++. MongoDB is a  cross-platform ,  document-oriented  database that provides,  high performance, high availability, and easy scalability . MongoDB works on the concept of collection and document. Database The database is a physical container for collections Collection A collection is a group of MongoDB documents. It is the equivalent of an RDBMS table Document A document is a set of key-value pairs. Documents have a dynamic schema. Documents in the same collection do not need to have the same set of fields or structure, and common fields in a collection's documents may hold different types of data. _id Field of a Document _id is a 12 bytes hexadecimal number which assures the uniqueness of every document. You can provide _id while inserting the document. If you don’t provide then MongoDB provides a unique id for every document. These ...

Essential Features of Spring Boot  What is Spring Boot Create stand-alone Java applications, which contains an embedded tomcat server. It is a Spring-based production-ready project initializer. It reduces the requirement to write a lot of configuration and boilerplate code. 1. AutoConfiguration In a modern-day Spring application, which uses Java-based configuration, you need to add the following two methods into your Configuration class @Bean  public JdbcTemplate jdbcTempalte(DateSource ds){       return new JdbcTempalte(ds);  }  @Bean  public DataSource dataSource(){   return new EmbeddedDatabaseBuilder()  .setType(EmbeddedDatabaseType.H2)   .addScripts('ddl.sql', 'data.sql')  .build();  }              But, more importantly, this is a piece of code which many of us have written irrespective of our application. I mean, this code is not unique and every sin...

https://stackoverflow.com/questions/56085797/i-cant-identify-the-errorjava-invalid-source-release-11-please-help-me

What is Restful Web Service? REST  stands for  REpresentational State Transfer This  is used to build Web services that are lightweight, maintainable, and scalable in nature. A service which is built on the REST architecture is called a  RESTful  service. The underlying  protocol  for REST is  HTTP , which is the basic web protocol.  It revolves around resource where every component is a resource and a resource is accessed by a common interface using HTTP standard methods. REST  is a way to access resources which are contained in a particular environment. For example, you could have a server that could be hosting important documents or images or videos. All of these are sort of resources. If a client, say a web browser needs any of these resources, it should request from the server to access these resources. Now REST defines a way on how these resources can be accessed. The key points of a RESTful implementation are...