root / qa / qa_config.py @ 3fc175f0
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# Copyright (C) 2007 Google 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 2 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, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# 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, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""QA configuration.
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"""
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import simplejson |
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import qa_error |
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cfg = None
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options = None
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def Load(path): |
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"""Loads the passed configuration file.
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"""
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global cfg
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f = open(path, 'r') |
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try:
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cfg = simplejson.load(f) |
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finally:
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f.close() |
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Validate() |
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def Validate(): |
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if len(cfg['nodes']) < 1: |
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raise qa_error.Error("Need at least one node") |
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if len(cfg['instances']) < 1: |
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raise qa_error.Error("Need at least one instance") |
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def get(name, default=None): |
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return cfg.get(name, default)
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def TestEnabled(test): |
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"""Returns True if the given test is enabled."""
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return cfg.get('tests', {}).get(test, False) |
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def GetMasterNode(): |
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return cfg['nodes'][0] |
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def AcquireInstance(): |
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"""Returns an instance which isn't in use.
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"""
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# Filter out unwanted instances
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tmp_flt = lambda inst: not inst.get('_used', False) |
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instances = filter(tmp_flt, cfg['instances']) |
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del tmp_flt
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if len(instances) == 0: |
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raise qa_error.OutOfInstancesError("No instances left") |
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inst = instances[0]
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inst['_used'] = True |
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return inst
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def ReleaseInstance(inst): |
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inst['_used'] = False |
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def AcquireNode(exclude=None): |
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"""Returns the least used node.
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"""
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master = GetMasterNode() |
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# Filter out unwanted nodes
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# TODO: Maybe combine filters
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if exclude is None: |
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nodes = cfg['nodes'][:]
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elif isinstance(exclude, (list, tuple)): |
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nodes = filter(lambda node: node not in exclude, cfg['nodes']) |
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else:
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nodes = filter(lambda node: node != exclude, cfg['nodes']) |
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tmp_flt = lambda node: node.get('_added', False) or node == master |
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nodes = filter(tmp_flt, nodes)
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del tmp_flt
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if len(nodes) == 0: |
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raise qa_error.OutOfNodesError("No nodes left") |
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# Get node with least number of uses
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def compare(a, b): |
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result = cmp(a.get('_count', 0), b.get('_count', 0)) |
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if result == 0: |
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result = cmp(a['primary'], b['primary']) |
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return result
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nodes.sort(cmp=compare) |
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node = nodes[0]
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node['_count'] = node.get('_count', 0) + 1 |
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return node
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def ReleaseNode(node): |
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node['_count'] = node.get('_count', 0) - 1 |