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from gremlin_python.driver import request |
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from gremlin_python.process import traversal |
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class AsyncRemoteTraversalSideEffects(traversal.TraversalSideEffects): |
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def __init__(self, side_effect, client): |
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self._side_effect = side_effect |
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self._client = client |
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self._keys = set() |
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self._side_effects = {} |
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self._closed = False |
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async def __getitem__(self, key): |
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if isinstance(key, slice): |
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raise TypeError( |
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'AsyncRemoteTraversalSideEffects does not support slicing') |
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return await self.get(key) |
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async def keys(self): |
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"""Get side effect keys associated with Traversal""" |
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if not self._closed: |
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message = request.RequestMessage( |
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'traversal', 'keys', |
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{'sideEffect': self._side_effect, |
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'aliases': self._client.aliases}) |
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result_set = await self._client.submit(message) |
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results = await result_set.all() |
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self._keys = set(results) |
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return self._keys |
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async def get(self, key): |
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"""Get side effects associated with a specific key""" |
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if not self._side_effects.get(key): |
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if not self._closed: |
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results = await self._get(key) |
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self._side_effects[key] = results |
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self._keys.add(key) |
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else: |
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return None |
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return self._side_effects[key] |
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async def _get(self, key): |
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message = request.RequestMessage( |
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'traversal', 'gather', |
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{'sideEffect': self._side_effect, 'sideEffectKey': key, |
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'aliases': self._client.aliases}) |
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result_set = await self._client.submit(message) |
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return await self._aggregate_results(result_set) |
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async def close(self): |
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"""Release side effects""" |
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if not self._closed: |
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message = request.RequestMessage( |
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'traversal', 'close', |
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{'sideEffect': self._side_effect, |
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'aliases': {'g': self._client.aliases}}) |
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result_set = await self._client.submit(message) |
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self._closed = True |
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return await result_set.one() |
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async def _aggregate_results(self, result_set): |
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aggregates = {'list': [], 'set': set(), 'map': {}, 'bulkset': {}, |
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'none': None} |
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results = None |
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async for msg in result_set: |
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if results is None: |
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aggregate_to = result_set.aggregate_to |
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results = aggregates.get(aggregate_to, []) |
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# on first message, get the right result data structure |
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# if there is no update to a structure, then the item is the result |
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if results is None: |
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results = msg |
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# updating a map is different than a list or a set |
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elif isinstance(results, dict): |
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if aggregate_to == "map": |
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results.update(msg) |
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else: |
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results[msg.object] = msg.bulk |
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elif isinstance(results, set): |
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results.update(msg) |
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# flat add list to result list |
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else: |
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results.append(msg) |
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if results is None: |
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results = [] |
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return results |
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goblin-ogm /
aiogremlin
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