mirror of
https://github.com/GNS3/gns3-server
synced 2024-11-24 17:28:08 +00:00
50 lines
1.7 KiB
Python
50 lines
1.7 KiB
Python
#
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# Copyright (C) 2017 GNS3 Technologies Inc.
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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from gns3server.controller.controller_error import ControllerError
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import logging
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log = logging.getLogger(__name__)
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def get_next_application_id(projects, computes):
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"""
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Calculates free application_id from given nodes
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:param projects: all projects managed by controller
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:param computes: all computes used by the project
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:raises HTTPConflict when exceeds number
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:return: integer first free id
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"""
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nodes = []
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# look for application id for in all nodes across all opened projects that share the same computes
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for project in projects.values():
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if project.status == "opened":
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nodes.extend(list(project.nodes.values()))
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used = {n.properties["application_id"] for n in nodes if n.node_type == "iou" and n.compute.id in computes}
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pool = set(range(1, 512))
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try:
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application_id = (pool - used).pop()
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return application_id
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except KeyError:
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raise ControllerError(
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"Cannot create a new IOU node (limit of 512 nodes across all opened projects using the same computes)"
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)
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