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Google Guava BloomFilter

When the Guava project released version 11.0, one of the new additions was the BloomFilter class. A BloomFilter is a unique data-structure used to indicate if an element is contained ...
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Busting PermGen Myths

In my latest post I explained the reasons that can cause the java.lang.OutOfMemoryError: PermGen space crashes. Now it is time to talk about possible solutions to the problem. Or, ...
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Agile is Not for Everyone

Someone asked me again about self-assessments for their agile transition. That got me thinking about this problem of transitioning to agile. I don’t believe agile is for everyone ...
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TaskletStep Oriented Processing in Spring Batch

Many enterprise applications require batch processing to process billions of transactions every day. These big transaction sets have to be processed without performance problems. Spring ...
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ActiveMQ: Understanding Memory Usage

As indicated by some recent mailing list emails and a lot of info returned from Google, ActiveMQ’s SystemUsage and particularly the MemoryUsage functionality has left some people ...
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Session Timeout Handling on JSF AJAX request

Session Timeout Handling on JSF AJAX request When we develop JSF application with AJAX behaviour, we may experience the problem in handling timeout scenario of Ajax request. For example, ...
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A very light Groovy based web application project template

A very light Groovy based web application project template You might have heard of the project Grails is a Groovy version of Ruby on Rails like framework that let you create web application ...
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What is a PermGen leak?

What follows is a practical introduction to a specific type of memory problems in Java applications. Namely – we will analyze the errors that cause the java.lang.OutOfMemoryError: ...
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Git: Committing vs Pushing vs Stashing – OR: “what to do if I just want to work locally”

Many people ask me for advice when they’re trying to modify some code locally without the changes finding their way into the remote repository or – gods forbid – the production. ...
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Recycle Bin in Database

Oracle introduced in database 10g new feature called ‘Recycle Bin’ to store the dropped database objects. If any table is dropped then any associated object to this table ...
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