Memorynotfound Java Programming Tutorials
This tutorial demonstrates how to forward listener results using the @SendTo annotation using Spring Kafka, Spring Boot and Maven. We can use static typed topics, runtime expressions or application initialization expressions. Take a look...
In the following tutorial we demonstrate how to configure Spring Kafka with Spring Boot. Spring Boot uses sensible default to configure Spring Kafka. We can override these defaults using the application.yml property file. Project...
In the following tutorial we demonstrate how to setup a batch listener using Spring Kafka, Spring Boot and Maven. We start by configuring the BatchListener. You can optionally configure a BatchErrorHandler. We also demonstrate...
The following tutorial demonstrates how to send and receive a Java Object as a JSON byte[] to and from Apache Kafka using Spring Kafka, Spring Boot and Maven. We’ll send a Java Object as...
In this tutorial we demonstrate how to add/read custom headers to/from a Kafka Message using Spring Kafka. We start by adding headers using either Message<?> or ProducerRecord<String, String>. Followed by reading the values inside...
This tutorial demonstrates how to send and receive messages from Spring Kafka. We start by creating a Spring Kafka Producer which is able to send messages to a Kafka topic. Next we create a...
In this tutorial we demonstrate how to create a Spring Security Remember Me Hashing Authentication application. Remember me authentication is a feature that allows web sites to remember the identity of a user between...
This tutorial demonstrates how to configure Spring Security to use In Memory Authentication. We can easily customize the Spring Security AuthenticationManager to use Spring Security in memory authentication and add multiple users with different...
This tutorial demonstrates a Field Matching Bean Validation Annotation Example. When you are building forms you may come across a requirement to validate/compare if different fields inside a form are equal to another field...
This tutorial demonstrates how to integrate Google ReCaptcha into a Java Spring Web Application. reCAPTCHA is used to verify if the current computer is a human, preventing bots from automatically submitting forms. We integrated...
This tutorial demonstrates how to forward listener results using the @SendTo annotation using Spring Kafka, Spring Boot and Maven. We can use static typed topics, runtime expressions or application initialization expressions. Take a look...
In the following tutorial we demonstrate how to configure Spring Kafka with Spring Boot. Spring Boot uses sensible default to configure Spring Kafka. We can override these defaults using the application.yml property file. Project...
In the following tutorial we demonstrate how to setup a batch listener using Spring Kafka, Spring Boot and Maven. We start by configuring the BatchListener. You can optionally configure a BatchErrorHandler. We also demonstrate...
The following tutorial demonstrates how to send and receive a Java Object as a JSON byte[] to and from Apache Kafka using Spring Kafka, Spring Boot and Maven. We’ll send a Java Object as...
In this tutorial we demonstrate how to add/read custom headers to/from a Kafka Message using Spring Kafka. We start by adding headers using either Message<?> or ProducerRecord<String, String>. Followed by reading the values inside...
This tutorial demonstrates how to send and receive messages from Spring Kafka. We start by creating a Spring Kafka Producer which is able to send messages to a Kafka topic. Next we create a...
This tutorial demonstrates how to extract images from a PDF document in Java using Apache PDFBox. Maven Dependencies We use Apache Maven to manage our project dependencies. Make sure the following dependencies reside on...
This tutorial demonstrates how to convert a PDF document to images in Java using Apache PDFBox. Maven Dependencies We use Apache Maven to manage our project dependencies. Make sure the following dependencies reside on...
This tutorial demonstrates how to add a password and encrypt a PDF document in Java using Apache PDFBox. We also show how to decrypt a password protected PDF document. Maven Dependencies We use Apache...
This tutorial demonstrates how to add a watermark to a PDF document in Java using Apache PDFBox. Maven Dependencies We use Apache Maven to manage our project dependencies. Make sure the following dependencies reside...
