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Distributed Cache in Hadoop MapReduce
Sometimes when you are running a MapReduce job your Map task and (or) reduce task may require some extra data in terms of a file, a jar or a zipped file in order to do their processing. In such...
View ArticleOutputCommitter in Hadoop
In a distributed environment like Hadoop framework it is important to track the success or failure of all the tasks running on different nodes. The whole job should be marked as successfully finished...
View ArticleTips for improving MapReduce performance
In this post some of the tips for improving MapReduce job performance are given. Three areas where you can look for improving the MapReduce performance are.The Map taskThe Reduce task. Configuration of...
View ArticleHow to Sort a HashMap in Java
In this post we’ll see how to sort a HashMap in Java which is by design an unordered collection. You can sort a HashMap on either the keys or the values. So, let’s see example code to sort HashMap on...
View ArticleHow to Loop Through HashSet in Java
In this post we’ll see how you can iterate any Set implementation like HashSet in Java. To loop through a HashSet you have following options, you can choose based on your requirement or the Java...
View ArticleHashSet in Java
HashSet in Java is the implementation of the Set interface and it is an unordered collection meaning insertion order is not maintained in a HashSet. Following are the important points about the HashSet...
View ArticleTransaction Management in Spring
This post gives an overview of Spring transaction management.What is transactionIn an application transaction is a sequence of events with all or none proposition. That is either all the events...
View ArticleSpring Transaction Attributes - Propagation And Isolation Level Settings
When you declare a transaction in Spring transaction management you can define certain attributes for that transaction. These attributes define how the transaction will function. Spring transaction...
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Spring Transaction Management JDBC Example Using @Transactional Annotation
In the post Transaction Management in Spring we have already seen the details about transaction management in Spring. In this post, building on that knowledge we’ll see an example of transaction...
View ArticleSpring Batch Processing Using JDBCTemplate batchUpdate() Method
If you have a large number of similar queries it is better to process them in a batch. Processing them as a batch provides better performance as you send a group of queries in a single network...
View ArticleSpring Batch Processing With List of Objects in batchUpdate() Method
In the post Spring Batch Processing Using JDBCTemplate batchUpdate() Method we have already seen how you can use batchUpdate() method with BatchPreparedStatementSetter interface for processing similar...
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Adding Tomcat Server to Eclipse
This post shows how you can add Apache Tomcat server to the Eclipse IDE and start and stop it from Eclipse IDE itself.Downloading Apache Tomcat Server If you don’t have Tomcat server yet you can...
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Spring Web MVC Example With Annotations
In this post we’ll see a Spring web MVC example which is one step better than hello world Spring web MVC example as we’ll create two views (JSPs), that will give you a better idea about the controller...
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Spring Web MVC Tutorial
This Spring web MVC tutorial gives an overview of Spring web MVC and what all components are there in the Spring MVC framework.Spring MVCSpring web MVC as the name suggests follows the MVC...
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Spring Web MVC Java Configuration Example
In the post Spring Web MVC Example With Annotations we saw a Spring MVC example with XML configuration, here we’ll create the same MVC application using Spring MVC Java configuration. In this Spring...
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Spring MVC Example With @PathVaribale - Creating Dynamic URL
In this Spring web MVC example we’ll see how request data can be passed to the controller using @PathVariable annotation along with @RequestMapping annotation.@RequestMapping with @PathVariable...
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Spring MVC Example With @RequestParam Annotation
In this Spring web MVC example with @RequestParam annotation we’ll see how request data can be passed to the controller using @RequestParam annotation along with @RequestMapping annotation....
View ArticleConnection Pooling With Apache DBCP Spring Example
This post shows how to provide JDBC connection pooling using Apache DBCP data source in Spring framework. DB used in this example is MySQL.Maven dependency for...
View ArticleConnection Pooling Using C3P0 Spring Example
This post shows how to provide JDBC connection pooling using C3P0 data source in Spring framework. DB used in this example is MySQL.Maven dependency for...
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Spring MVC Form Example With Bean Validation
In this post we’ll see a Spring MVC form processing example along with bean validation. Technologies usedFollowing is the list of tools used for the Spring web MVC example.Spring 5.0.8 Release (Spring...
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