Hi all, I'm coming from dev@commons list and was redirected there by Marco, the discussion is available on our archives ([1])
Long story short, I'm looking for a core DAG library which is dependency free (~100K is ok for the stack, more will need to bring a lot of value ;)). My need is "simple" but very generic (so shareable) and should be strong (so better if shared and reused instead of coded by app): 1. load/build a graph (DAG actually) model 2. be able to navigate in the model to capture nodes (mainly upstream browsing in my case but downstream will be useful quite quickly) 3. create a new DAG by "mutating" (copy of an immutable model is not an issue) the original graph 4. dump back the newly obtained graph I did a quick prototype at [2] - please ignore the specificity of the model loading using JSON-B and modelisation using ports which is likely specific to my case (?). The interesting piece of code (core logic) is this class [3] and the findUpStream method usage of the DAG. In terms of logic it is very close to what Spark does when it "pushes down" some filter/predicates in a source during a plan computation (that's why it is called this way in the PoC). Therefore my question to Jena are: 1. Does it somehow overlap with Jena goals (even if low level)? 2. Can it be extracted in a jena-graph (core would maybe depend on it?) without guava, slf4j implementation (api is ok) and base dependencies? Concretely jena-graph+slf4j-api are ok for me, more wouldn't. 3. Is a graph modelization not RDF specific ok and would it be stable for consumers? [1] https://markmail.org/search/?q=graph%20status%20list%3Aorg.apache.commons.dev%2F#query:graph%20status%20list%3Aorg.apache.commons.dev%2F+page:1+mid:pxecs5y3ezmfztbj+state:results [2] https://github.com/rmannibucau/drag [3] https://github.com/rmannibucau/drag/blob/master/src/main/java/com/github/rmannibucau/graph/drag/rule/PushdownRule.java Romain Manni-Bucau @rmannibucau <https://twitter.com/rmannibucau> | Blog <https://rmannibucau.metawerx.net/> | Old Blog <http://rmannibucau.wordpress.com> | Github <https://github.com/rmannibucau> | LinkedIn <https://www.linkedin.com/in/rmannibucau> | Book <https://www.packtpub.com/application-development/java-ee-8-high-performance>
