added /streams support
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Sandy Walsh
parent
f176d68ad8
commit
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@ -13,6 +13,10 @@
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import ConfigParser
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import traceback
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import falcon
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import simport
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@ -24,11 +28,11 @@ class NotImplemented(Exception):
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pass
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def _load_implementations(impl_map, versions, config):
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def _load_implementations(impl_map, versions, config, scratchpad):
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for version in versions:
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target = config.get('v%d_impl' % version)
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target = config.get('global', 'v%d_impl' % version)
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klass = simport.load(target)
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impl_map[version] = klass()
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impl_map[version] = klass(config, scratchpad)
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def _initialize(enabled_versions, implementation_map):
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@ -45,32 +49,58 @@ def _initialize(enabled_versions, implementation_map):
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if not impl:
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raise NotImplemented("No implementation available for Quincy"
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" version %d" % version)
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print "Version %d using %s" % (version, impl)
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routes.append(klass(version, api, impl))
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# TODO(sandy): We need to create the /v1
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# ...
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# /vN
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# TODO(sandy): We need to create the top-level /v1, ... /vN
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# resources here too.
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return api
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# There may have been prior versions
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# but they could be deprecated and dropped.
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# Only the versions specified here define
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# the currently supported StackTach.v3 API.
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enabled_versions = [1, 2]
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def _get_api(config_location=None):
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print "Using config_location=%s (None means default impl)" % config_location
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# The default implementation is internal and works with
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# a fake/static set of data.
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local_config = {'v1_impl': 'v1_impl:Impl',
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'v2_impl': 'v2_impl:Impl'}
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# The default implementation is internal and works with
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# a fake/static set of data.
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local_config = ConfigParser.ConfigParser()
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local_config.add_section('global')
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local_config.set('global', 'v1_impl', 'v1_impl:Impl')
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local_config.set('global', 'v2_impl', 'v2_impl:Impl')
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impl_map = {}
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_load_implementations(impl_map, enabled_versions, local_config)
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# There may have been prior versions
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# but they could be deprecated and dropped.
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# Only the versions specified here define
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# the currently supported StackTach.v3 API.
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enabled_versions = [1, 2]
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# TODO(sandy): Overlay the impl_map with the implementations
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# specified in the config file.
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# config = ...
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# _load_implementations(impl_map, enabled_versions, config)
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if config_location:
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config = ConfigParser.ConfigParser()
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config.read(config_location)
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enabled_versions = [int(x) for x in
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config.get('global', 'enabled_versions')
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.split(',')]
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api = _initialize(enabled_versions, impl_map)
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# Rather than every implementation duplicate resources, the
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# scratchpad is a shared storage area all the implementations
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# can use to share things (like pipeline drivers, etc).
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scratchpad = {}
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impl_map = {}
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_load_implementations(impl_map, enabled_versions, local_config,
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scratchpad)
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if config_location:
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# Overlay the impl_map with the implementations
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# specified in the config file.
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_load_implementations(impl_map, enabled_versions, config,
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scratchpad)
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return _initialize(enabled_versions, impl_map)
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def get_api(config_location=None):
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try:
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return _get_api(config_location)
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except Exception as e:
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print "Error getting API:", traceback.format_exc()
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return None
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@ -15,6 +15,8 @@
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import json
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from dateutil import parser
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import common
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@ -29,20 +31,45 @@ class StreamCollection(common.FalconBase):
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# younger_than
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# state
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# trigger_name
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# id
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# distinquishing_traits - find stream by dtrait values.
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#
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# Actions on a Stream:
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# details - get full details on stream (including distriquishing traits)
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# events - get the events collected for this stream.
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# details - get full details on stream (including events &
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# distriquishing traits)
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def on_get(self, req, resp):
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streams = self.impl.get_streams(resp)
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dicts = [stream.to_dict() for stream in streams]
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resp.body = json.dumps(dicts)
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older_than = req.get_param('older_than')
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younger_than = req.get_param('younger_than')
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state = req.get_param('state')
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trigger = req.get_param('trigger_name')
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traits = req.get_param('distinquishing_traits')
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if older_than:
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older_than = parser.parse(older_than)
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if younger_than:
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younger_than = parser.parse(younger_than)
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streams = self.impl.get_streams(older_than=older_than,
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younger_than=younger_than,
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state=state,
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trigger_name=trigger,
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distinquishing_traits=traits)
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resp.body = json.dumps(streams)
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class StreamItem(common.FalconBase):
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pass
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def on_get(self, req, resp, stream_id, action=None):
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details = action == 'details'
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stream = self.impl.get_stream(stream_id, details)
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resp.body = json.dumps(stream.to_dict())
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def on_delete(self, req, resp, stream_id):
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self.impl.delete_stream(stream_id)
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def on_put(self, req, resp, stream_id, action=None):
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reset = action == 'reset'
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self.impl.reset_stream(stream_id)
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class Schema(object):
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@ -61,3 +88,5 @@ class Schema(object):
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self.stream_collection)
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self.api.add_route('%s/streams/{stream_id}' % self._v(),
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self.stream_item)
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self.api.add_route('%s/streams/{stream_id}/{action}' % self._v(),
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self.stream_item)
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@ -23,17 +23,40 @@ class Stream(object):
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self.stream_id = stream_id
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self.trigger_name = trigger_name
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self.state = state
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self.distinquishing_traits = []
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def to_dict(self):
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return {"last_updated": str(self.last_updated),
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"stream_id": self.stream_id,
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"trigger_name": self.trigger_name,
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"state": self.state}
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"state": self.state,
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"distinquishing_traits": self.distinquishing_traits}
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class Impl(object):
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def get_stream(self, resp):
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sid = str(uuid.uuid4())
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return [Stream(sid, "EOD-Exists", "Collecting")
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Stream(sid, "EOD-Exists", "Error")
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Stream(sid, "Request-ID", "Ready")]
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def __init__(self, config, scratchpad):
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self.config = config
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self.scratchpad = scratchpad
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def get_streams(self, **kwargs):
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"""kwargs may be:
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older_than
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younger_than
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state
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trigger_name
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distinquishing_traits
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"""
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x = [Stream(str(uuid.uuid4()), "EOD-Exists", "Collecting"),
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Stream(str(uuid.uuid4()), "EOD-Exists", "Error"),
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Stream(str(uuid.uuid4()), "Request-ID", "Ready")]
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return [stream.to_dict() for stream in x]
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def get_stream(self, stream_id, details):
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return Stream(str(uuid.uuid4()), "Request-ID", "Ready")
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def delete_stream(self, stream_id):
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pass
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def reset_stream(self, stream_id):
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pass
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@ -1,2 +1,3 @@
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python-dateutil
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falcon
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simport >= 0.0.dev0
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