Difference between revisions of "SimpleGraph"
| Line 114: | Line 114: | ||
=== converting the graph to graphviz === | === converting the graph to graphviz === | ||
The graph is now available and can be traversed to create a graphviz version of it. We use | The graph is now available and can be traversed to create a graphviz version of it. We use | ||
| − | the {{Rythm}} template engine to do so. Within Rythm you can use Java code. | + | the {{Link|target=Rythm}} template engine to do so. Within Rythm you can use Java code. |
| − | + | Basically we try out the code in the | |
| + | [https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/src/test/java/com/bitplan/simplegraph/TestRythm.java TestRythm JUnit test] and then use it in the Rythm template | ||
| + | [https://github.com/BITPlan/com.bitplan.simplegraph/blob/master/src/main/rythm/graphvizTree.rythm graphvizTree.rythm] | ||
}} | }} | ||
Revision as of 18:04, 13 January 2018
SimpleGraph
SimpleGraph is an open source project that allows to wrap Systems APIs in a way that graph algorithms and storage can be applied. As an implementation Apache Gremlin/Tinkerpop is used.
FileSystem example
Basics
A Filesystem is a graph. It consists of File and Directory nodes
There is parent-child relation between Directories and their subfiles. A Directory may contain files and directories. A file is always leaf of the the tree. A directory may be a leaf if it's empty. In our example we'll go from directories to the containing elements via the "files" edge/relation and from the files/directories to their parents via the "parent" edge.
Example goal
We'd like to analyze some part of a filesystem and we'll use the "src" directory of the SimpleGraph project's source code as a starting point.
The graph below shows the source code structure for the SimpleGraph project with the root of the tree being the "src" directory. The nodes are clickable and will lead you to the corresponding file representation on github.
Example FileSystem Graph or "src" directory
explanation
creating the graph
This graph visualization has been produced with the following Java lines which make sure that the "src" Directory can be handled as a gremlin graph:
// create a new FileSystem acces supplying the result as a SimpleSystem API
SimpleSystem fs=new FileSystem();
// connect to this system with no extra information (e.g. no credentials) and move to the "src" node
SimpleNode start = fs.connect("").moveTo("src");
// do gremlin style out traversals recusively to any depth
start.recursiveOut("files",Integer.MAX_VALUE);
converting the graph to graphviz
The graph is now available and can be traversed to create a graphviz version of it. We use the Rythm template engine to do so. Within Rythm you can use Java code. Basically we try out the code in the TestRythm JUnit test and then use it in the Rythm template graphvizTree.rythm