In this tutorial we will start a thread on the application startup using spring bean.So we will start the thread using @PostConstruct annotation on the method. So this makes sure that the annotated method is called before the Spring bean is put into service. And we will be using executor service to start a thread. … Read more
I was recently working on an application that used hibernate for db access and lucene for storing and searching text. This combination was really great. It made searching really fast. And tomcat was used as the application container.Sometimes I used to get this exception on redeploy: And also tomcat used to complain that it could … Read more
Today we are showing how to instantiate lucene using spring. We will be using annotations for instating the spring bean. Lets jump directly to the example class to see how it is done So the above class is a singleton spring bean. The annotation PostConstruct on the method init make sure that lucene IndexWriter is started on the startup. … Read more
In the last tutorial, i showed how to write a java object to an XML file and to convert an XML file to a java object.Today we are looking at a tutorial by which we can convert a java object to an XML and store that XML in a string rather than a file. In … Read more
What is scrum? Scrum is an agile methodology that tries to overcome the issues with waterfall concept.What is a standup meeting? Standup meetings are daily meetings in which all the team gives status about the three questions: 1. What did i do yesterday? 2. What is blocking me? 3. What am i doing today? This … Read more
maven 3.x has bought in a great feature, the possibility of parallel builds. mvn -T 4 clean install # Builds with 4 threads mvn -T 1C clean install # 1 thread per cpu core mvn -T 1.5C clean install # 1.5 thread per cpu co I have been doing some experiments with this parallel builds … Read more
As we moved to the latest version of the log4j. We were using log4j 1.x and now we upgraded to log4j 2.x. We have 4 webapps in single tomcat container and they all share the same log4j2.xml. This log4j2.xml is provided at the startup of the tomcat container using the property “log4j.configurationFile”. property In log4j2.xml we had … Read more
Here is an example of a configuration which would write all the logs to a file and once a size limit has been reached it will create a history file for the logs in a folder. So let us see the xml configuration then: So the above configuration will create a tomcat.log file in the … Read more
I used to get this maven warning all the time for a project with maven 3.3.3 I have a top level project Parent1 and Parent2. Here I will explain the modules I have and how i tried to use them: And module 2 created by me as another project Whenever i changed module2 I used … Read more
In this tutorial we see how to generate a random number using the Random class in java and using the method Random().nextInt(int bound). We will create a class named RandomIntegerGenerator. In this class we will use Random().nextInt(int bound) . It generates a random integer from 0 (inclusive) to bound (exclusive). Here we will set the bound … Read more
