BUG: Indy versions <= 0.24.0
Versions of Indy up to and including 0.24.0 have a bug in the Depgraph add-on. If you have not saved your first workspace (by discovering a dependency graph) and you try to list the workspaces on the system, it will throw a NullPointerException. The issue is tracked in Indy #223.
Examples
Listing the workspaces stored in the system is straightforward:
Using the Java Client API
WorkspaceList listing = module.listWorkspaces();
for( String wsid: listing.getWorkspaces() ){
System.out.printf( "Got workspace: %s\n", wsid );
}
Using the REST API
$ curl -i \
-H 'Accept: application/json' \
http://localhost:8080/api/depgraph/ws
HTTP/1.1 200 OK
Connection: keep-alive
Transfer-Encoding: chunked
Content-Type: application/json
Date: Thu, 17 Sep 2015 21:37:38 GMT
{
"workspaces": [
"my-workspace"
]
}