Skip to main content

Run Spring Boot application in Standalone Tomcat Server

How to run Spring Boot application on Tomcat


To deploy a Spring Boot application on existing Tomcat Server, or to bundle it as war file and deploy on Tomcat, following changes are required:
  • Change to war packaging in pom.xml:
<packaging>war
  • Application Main class to extend  SpringBootServletInitializer.
  • Override configure method in this class.
               protected SpringApplicationBuilder configure(SpringApplicationBuilder application) {
                       return application.sources(Application.class);
               }
  • Add Tomcat-starter dependency in pom.xml.
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-tomcat</artifactId>
    <scope>provided</scope>
</dependency>
  • Run maven install, war will generate in target folder.
  • Deploy on standalone Tomcat Server.
  • Don't forget to add context root to access the services.

I will be happy to help if you run into some issues, while following above steps. Do drop the comments in the comment section.

<<<<<<<<<<<<<<<<<   Happy Coding >>>>>>>>>>>>>>>>>


Comments

Popular posts from this blog

Add/Modify Header Values in Java HttpServletRequest using Servlet Filters

Add/Modify Header Values in Java HttpServletRequest using Servlet Filters Steps to Modify Request Headers in a Servlet Request. This example will demonstrate how to modify 'Content-Type' header in Java Servlet Filter. In order to achieve this, use a custom wrapper Class, that extends HttpServletRequestWrapper. Thereafter, we need to override certain methods inside this custom Class. getHeader(String name) getHeaders(String name) getHeaderNames() getParameter(final String name) Code snippet for overriding above methods.     @Override     public String getHeader(String name) {     String header = super.getHeader(name); if ("content-type".equalsIgnoreCase(name)){ System.out.println("Adds Header Content-Type as application/json"); return "application/json"; }         return header;     }          @Override     public Enumeration getHeaders(String name) {         List values = Collection

Extracting Data from Twitter using Twitter API (in Python/Pycharm)

Pre-Requisites for this task: User should have a Twitter Account. Phone number should be linked with Twitter Account. ( Ways to Add Phone number in twitter ) Pycharm should be installed. Add Plugin named Tweepy in Pycharm. Obtain Twitter API Key from Twitter. How To Obtain Twitter API key: Go to apps.twitter.com and log in with your Twitter account. Click 'Create a new app' and fill the details. Callback URL is not mandatory. The system will generate an API key and an API secret. Generate an access token on 'Keys and Access Tokens' tab. Four keys will be generated. What exactly to write in Pycharm: import tweepy consumer_key = 'CONSUMER-KEY-FROM-TWITTER' consumer_secret = 'CONSUMER-SECRET-FROM-TWITTER' access_token = 'ACCESS-TOKEN-FROM-TWITTER' access_secret = 'ACCESS-SECRET-FROM-TWITTER' authentication = tweepy.OAuthHandler(consumer_key,consumer_secret) authentication.set_access_token(access_token, access_sec

Fixing Keycloak Error : MediaType not set on path , with response status 200

Using a custom endpoint with Media Type set as 'Application/Json'. When this endpoint is accessed, below error is returned. ERROR [org.keycloak.headers.DefaultSecurityHeadersProvider] (default task-16) MediaType not set on path /auth/realms/my-realm/broker/keycloak-oidc/token, with response status 200 06:31:08,489 ERROR [org.keycloak.services.error.KeycloakErrorHandler] (default task-16) Uncaught server error: javax.ws.rs.InternalServerErrorException: HTTP 500 Internal Server Error at org.keycloak.keycloak-services@10.0.2//org.keycloak.headers.DefaultSecurityHeadersProvider.addHeaders(DefaultSecurityHeadersProvider.java:71) at org.keycloak.keycloak-services@10.0.2//org.keycloak.services.filters.KeycloakSecurityHeadersFilter.filter(KeycloakSecurityHeadersFilter.java:36) The fix for this is to bind the blank response to Application/Json as follows: return Response.ok(json, MediaType.APPLICATION_JSON).build(); Do try it out, and let me know if it works. Do drop some comments is an