Endpoint for handling FCS (version 2) requests

[wojciechrauk]

This branch enables FCS version 2 functionality for Kontext under "/fcs/v2" path.

[wojciechrauk]

Sorry for late reply, right now only basic functionalities of FCS v2 are implemented (the same that were present for version 1), the changes revolve mostly around minor differences in data presentation between versions.

[kosarko]

@wojciechrauk Sorry for the delays; we did deploy it on a dev instance and tried it with the aggregator. There was some error (recordPacking seems to be missing? see below), maybe @dietervu has other details.

        "https://lindat.mff.cuni.cz/services/kontext-staging/staging/fcs/v2" : {
          "version" : "VERSION_2",
          "rootCollections" : [ ],
          "maxConcurrentRequests" : 4,
          "diagnostics" : { },
          "errors" : {
            "ParseError at [row,col]:[2,254]\nMessage: expected element '{http://docs.oasis-open.org/ns/search-ws/sruResponse}recordPacking', but found '{http://docs.oasis-open.org/ns/search-ws/sruResponse}recordXMLEscaping'" : {
              "exception" : {
                "klass" : "eu.clarin.sru.client.SRUClientException",
                "message" : "ParseError at [row,col]:[2,254]\nMessage: expected element '{http://docs.oasis-open.org/ns/search-ws/sruResponse}recordPacking', but found '{http://docs.oasis-open.org/ns/search-ws/sruResponse}recordXMLEscaping'",
                "cause" : null
              },
              "context" : "https://lindat.mff.cuni.cz/services/kontext-staging/staging/fcs/v2?operation=explain&version=1.2&x-fcs-endpoint-description=true",
              "counter" : 1
            }
          },
          "avgQueueTime" : 0.001,
          "maxQueueTime" : 0.001,
          "avgExecutionTime" : 0.308,
          "maxExecutionTime" : 0.308,
          "numberOfRequests" : 1
        }
      },

[wojciechrauk]

Thank you! I'll try to see into it shortly :)

[wojciechrauk]

Hi! I believe the error could have been caused by aggregator expecting FCS v1.2 "context" : "https://lindat.mff.cuni.cz/services/kontext-staging/staging/fcs/v2?operation=explain&version=1.2&x-fcs-endpoint-description=true"

I've added handling for FCS v1.2 in FCS v2.0, aggregator should be able to choose which version it's going to use.

Also, sorry for 6 months of inactivity.