Download JAR files tagged by upfront with all dependencies

The pomlint mojo helps enforcing a certain style in Maven projects. This is particular useful in a multi-module project maintained by large teams of developers. Often best practices are ignored when the project becomes busy. This leads to pom structures that are hard to maintain and thus degrade the projects agility. By having a linter enforce the rules upfront many of the simple mistakes can be avoided.

This small library provides an optimized solution to a problem where tasks for a particular key need to be processed sequentially as they arrive. This kind of problem can be solved by a SingleThreadExecutor, however it is not efficient. The issue is that the tasks for unrelated keys are not being processed in parallel, instead they are put into a queue common to all keys and wait for the single thread to execute them. This library allows them to be executed concurrently. Moreover this library works well in a situation where all the possible keys and their number is not known upfront.

The Java JDK includes various means of creating/consuming compressed files. What is missing is easy way of creating lazy streamed zip archive, in spirit of java.util.zip.DeflaterInputStream. This implementation relies on the fact that the PKZIP specification allows archiving data streams of sizes not known upfront. This implies that the archives produced will be readable only by tools aware of this trick. Notably, java.util.zip.ZipInputStream is OK with that, so we use it to test compatibility.