17.1.1 Loading a Graph

The following describes the steps for loading a graph:

1. Create a Session and an Analyst.
   • JShell
   • Java
   • Python

   cd /opt/oracle/graph/
   ./bin/opg4j
   // starting the shell will create an implicit session and analyst

   import oracle.pgx.api.*;
   import oracle.pgx.api.mllib.DeepWalkModel;
   import oracle.pgx.api.frames.*;

   # starting the Python shell will create an implicit session and analyst

2. Load the graph.

   Note:

   Though the DeepWalk algorithm implementation can be applied to directed or undirected graphs, currently only undirected random walks are considered.
   • JShell
   • Java
   • Python

   opg4j> var instance = GraphServer.getInstance("https://localhost:7007", "<username>", "<password>".toCharArray())
   opg4j> var session=instance.createSession("mySession")
   opg4j> var graph = session.readGraphByName("<graph_name>",GraphSource.PG_VIEW)

   ServerInstance instance = GraphServer.getInstance("https://localhost:7007", "<username>", "<password>".toCharArray());
   PgxSession session = instance.createSession("my-session");
   PgxGraph graph = session.readGraphByName("<graph_name>",GraphSource.PG_VIEW);

   instance = graph_server.get_instance("https://localhost:7007","<username>","<password>")
   session = instance.create_session("my_session")
   graph = session.read_graph_by_name("<graph_name>", "pg_view")