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ScheduleMessageUsingSpringBootRESTAPI

RESTful web service that schedules messages to be printed

#How to Build the project Step1: Go to the project structure where POM.xml file resides and open the command prompt and run he below command to generate the project dependecies step2: mvn clean install -DskipTests

#How to Run the project Step1: After compliation and bild of project, we need to run the project using command line tool or IDE (IntelLIJ) Step2: Using command line window, stay on project structure folder where POM.xm file reside and runt he command below Step3: mvn spring-boot:run Step4: Above command will runt he spring boot project and deploy into embedded tomcat server on custom port number 8080 image

#How to access project on browser #1. SWAGGER - Swagger is an Interface Description Language for describing RESTful APIs expressed using JSON.

Step1: run he url - http://localhost:8088/swagger-ui.html#/ Step2: Where we can see the swagger dashboard consist of List of operation of HTTP methods like GET, POST, DLEETE and list of REST Api operation developed Step3: To ScheduleMessage, access the url "http://localhost:8088/swagger-ui.html#!/message-controller/scheduleMessageUsingPOST", in which it uses HTTP POST method to creat the message body and deliveryDate of message with below payload Expected Value:

{
  "deliveryDate": "2021-07-13T16:09:46.295Z",
  "message": "string"
}

Step4: Similarly to the above steps, we can do HTTP operations like GET, POST, DELETE, PUT, UPDATE, DELETE ALL and GET ALL by using the Listed Operation using Swagger API image

#How to Run the H2 Database using Browser H2 Database - H2 is a relational database management system written in Java. It can be embedded in Java applications or run in client-server mode using Spring Boot. Step1: After running the Application sucessfull and UP, Hit the below url in browser to access the H2 database Step2: http://localhost:8088/h2-ui Step3: use JDBC url - jdbc:h2:file:~/testdb and hit on button "connect"//to store in file database on disk Step4: Where it provide SQL query box and list of tables image

#How Scheduler works and print the schedule messages on to Console Scheduler in integrated into Spring boot Application using the cron expression to run for every 1 minute time interval, in which it will fetch the message which are scheduled. image