# | Copyright 2012-2016 Karlsruhe Institute of Technology
# |
# | Licensed under the Apache License, Version 2.0 (the "License");
# | you may not use this file except in compliance with the License.
# | You may obtain a copy of the License at
# |
# |     http://www.apache.org/licenses/LICENSE-2.0
# |
# | Unless required by applicable law or agreed to in writing, software
# | distributed under the License is distributed on an "AS IS" BASIS,
# | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# | See the License for the specific language governing permissions and
# | limitations under the License.

from grid_control.backends.wms_multi import MultiWMS
from grid_control.utils.thread_tools import tchain
from python_compat import ifilter, imap

class ThreadedMultiWMS(MultiWMS):
	def _forwardCall(self, args, assignFun, callFun):
		argMap = self._getMapID2Backend(args, assignFun)
		def makeGenerator(wmsPrefix):
			return callFun(self._wmsMap[wmsPrefix], argMap[wmsPrefix])
		activeWMS = ifilter(lambda wmsPrefix: wmsPrefix in argMap, self._wmsMap)
		for result in tchain(imap(makeGenerator, activeWMS)):
			yield result
