StormCrawler is an open source collection of resources for building low-latency, scalable web crawlers on Apache Storm. It is provided under Apache License and is written mostly in Java.
NOTE: These instructions assume that you have Apache Maven installed.
The easiest way to get started is to generate a brand new StormCrawler-based project using :
mvn archetype:generate -DarchetypeGroupId=com.digitalpebble.stormcrawler -DarchetypeArtifactId=storm-crawler-archetype -DarchetypeVersion=1.14
You'll be asked to enter a groupId (e.g. com.mycompany.crawler), an artefactId (e.g. stormcrawler), a version and package name.
This will not only create a fully formed project containing a POM with the dependency above but also the default resource files, a default CrawlTopology class and a configuration file. Enter the directory you just created (should be the same as the artefactId you specified earlier) and follow the instructions on the README file.
Alternatively if you can't or don't want to use the Maven archetype above, you can simply copy the files from archetype-resources.
Have a look at the code of the CrawlTopology class, the crawler-conf.yaml file as well as the files in src/main/resources/, they are all that is needed to run a crawl topology : all the other components come from the core module.
The WIKI is a good place to start your investigations but if you are stuck please use the DigitalPebble mailing list or use the tag stormcrawler on StackOverflow.
DigitalPebble Ltd provide commercial support and consulting for Storm-Crawler.
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