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How to check if the process is running on Linux in Java


In this article, we will learn how to check whether a specific process is running on Linux in Java. There is a case where we have to check before executing the tasks whether a specific process is currently running or not. Read More »

Spring Boot – Pagination, Sorting operations


While developing any spring boot API, We create many rest endpoints for the CRUD operation on data, which deals with large volume of data. Because of the large volume, fetching of records from database takes more time. To overcome this types of cases we have some options in hand. Set limit for every request. Use pagination in fetching the records ... Read More »

Set globally multiple header parameters in Swagger


In this article, we will learn how to set multiple header parameters globally in a Spring Boot application. Why do we need it? There are cases where we want the client to send multiple header parameters along with the one auth token, these parameters may be useful to validate the token or may be required along with the token to ... Read More »

CVE-2021-44228 Spring Boot and Log4j2 Vulnerability


What is CVE-2021-44228? CVE-2021-44228 is a vulnerability impacting all the applications written in Java and using the component Apache Log4j2 for logging. This vulnerability allows the unauthenticated remote code execution using the JNDI Lookup. Log4j2 is widely used directly or through dependencies in almost every Java application. These application includes almost all the enterprise level application and almost all the ... Read More »

Enable the access logs in Spring Boot for embedded tomcat server


Access logs contains the information about the request received and response sent to the client. It contains all the important data which are required to analyze the type of request coming to the application. Below are the steps which is required to configure the tomcat access logs for the Spring Boot application. Settings in application.properties file These are the common ... Read More »

Create a custom favicon in Spring Boot application


In this article, we will learn how to configure custom favicon in the spring boot application. Favicon is the iconic representation of any website. It is placed in the address bar of any web browser. Spring boot provides option to create custom favicon for your website. First create a favicon for your website, place it in the resources directory of ... Read More »

Configure Logback in Spring-Boot Application for Logging


In this article, we will learn how to configure logback in the spring boot application for logging and how to configure Logback with specifications including console and file output separately, and here we will also learn to use the rolling file policy to avoid generating large size log files and after a certain threshold size limit it will be back ... Read More »

Configure Spring RestTemplate with OkHttp3 in Spring Boot Application


Okhttp3 is a popular HTTP client implementation for Java and we can easily embed it in our Spring Boot RestTemplate abstraction. Below is the Bean definition which binds the instance of Okhttp3 client with RestTemplate. Now to integrate in our implementation class we just need to autowire the Resttemplate to use this customized Okhttp3 based resttemplate. How to use RestTemplate ... Read More »

Configure Spring RestTemplate with HttpClient in the Spring Boot Application


In this post we will learn how to configure Spring RestTemplate with HttpClient in the Spring boot Applications. This example supports both HTTP and HTTPS. It Uses a connection-pool configurations to re-use connections and save overhead of creating connections. It has configurable request and socket timeouts, keep-alive strategy and also close idle connection strategy to monitor inactive connections and clean ... Read More »

Autowiring Components from external jars in Spring Boot Project


In an Spring Boot project, sometimes we have to autowire components which are available in another jar or in another module which is added as a jar in the main module of the project. Considering the use case of my spring boot application, I created my Spring Boot project, using maven modules. One of the modules was called daolayer, one ... Read More »