feat: configure textgrid host from env, reuse tgsearch client

src/tg-fcs-endpoint/service.py

@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: MIT
 
 from typing import Any, Dict, List, Optional, Union
+from os import getenv
 import logging
 
 from flask import Flask, Response, request
@@ -17,7 +18,8 @@ from clarin.sru.fcs.xml.writer import FCSRecordXMLStreamWriter
 
 from clarin.sru.exception import SRUException
 
-from tgclients import TextgridSearch
+from tgclients import TextgridSearch, TextgridConfig
+from tgclients.config import PROD_SERVER
 from tgclients.databinding.tgsearch import (
     Response as SearchResponse,
     ResultType,
@@ -56,6 +58,14 @@ MIMETYPE_TEI_XML = "application/x-tei+xml"
 logger = logging.getLogger(__name__)
 app = Flask(__name__)
 
+# config textgrid server urls from env
+TEXTGRID_HOST = getenv('TEXTGRID_HOST', PROD_SERVER)
+TGREP_HOST = getenv('TGREP_HOST', 'https://textgridrep.org')
+
+# only instantiate tgsearch once globally, for connection and databinding reuse
+tgconf = TextgridConfig(TEXTGRID_HOST)
+tgsearch = TextgridSearch(tgconf)
+
 
 def _cql2cqp(query: CQLQuery) -> str:
     node: Union[cql.parser.CQLTriple, cql.parser.CQLSearchClause] = (
@@ -212,8 +222,7 @@ class TgFCSEndpointSearchEngine(SimpleEndpointSearchEngineBase):
             # print("search within project: ", request.request.tg_project_id)
             project_filter = f"project.id:{request.request.tg_project_id}"
 
-        search = TextgridSearch()
-        results = search.search(
+        results = tgsearch.search(
             query,
             limit=request.get_maximum_records(),
             start=request.get_start_record(),