1
|
|
|
from aiogremlin.process.traversal import AsyncTraversalStrategies |
2
|
|
|
from aiogremlin.remote.remote_connection import AsyncRemoteStrategy |
3
|
|
|
|
4
|
|
|
from gremlin_python.process import graph_traversal, traversal |
5
|
|
|
|
6
|
|
|
|
7
|
|
|
class AsyncGraphTraversal(graph_traversal.GraphTraversal): |
8
|
|
|
"""Implements async iteration protocol and updates relevant methods""" |
9
|
|
|
|
10
|
|
|
def __aiter__(self): |
11
|
|
|
return self |
12
|
|
|
|
13
|
|
|
async def __anext__(self): |
14
|
|
|
if self.traversers is None: |
15
|
|
|
await self.traversal_strategies.apply_strategies(self) |
16
|
|
|
if self.last_traverser is None: |
17
|
|
|
self.last_traverser = await self.traversers.__anext__() |
18
|
|
|
object = self.last_traverser.object |
19
|
|
|
self.last_traverser.bulk = self.last_traverser.bulk - 1 |
20
|
|
|
if self.last_traverser.bulk <= 0: |
21
|
|
|
self.last_traverser = None |
22
|
|
|
return object |
23
|
|
|
|
24
|
|
|
async def toList(self): |
25
|
|
|
"""Reture results as ``list``.""" |
26
|
|
|
results = [] |
27
|
|
|
async for result in self: |
28
|
|
|
results.append(result) |
29
|
|
|
return results |
30
|
|
|
|
31
|
|
|
async def toSet(self): |
32
|
|
|
"""Return results as ``set``.""" |
33
|
|
|
results = set() |
34
|
|
|
async for result in self: |
35
|
|
|
results.add(result) |
36
|
|
|
return results |
37
|
|
|
|
38
|
|
|
async def iterate(self): |
39
|
|
|
"""Iterate over results.""" |
40
|
|
|
while True: |
41
|
|
|
try: |
42
|
|
|
await self.nextTraverser() |
43
|
|
|
except StopAsyncIteration: |
|
|
|
|
44
|
|
|
return self |
45
|
|
|
|
46
|
|
|
async def nextTraverser(self): |
47
|
|
|
"""Return next traverser.""" |
48
|
|
|
if self.traversers is None: |
49
|
|
|
await self.traversal_strategies.apply_strategies(self) |
50
|
|
|
if self.last_traverser is None: |
51
|
|
|
return await self.traversers.__anext__() |
52
|
|
|
else: |
53
|
|
|
temp = self.last_traverser |
54
|
|
|
self.last_traverser = None |
55
|
|
|
return temp |
56
|
|
|
|
57
|
|
|
async def next(self, amount=None): |
58
|
|
|
"""Return iterator with optionaly defined amount of items.""" |
59
|
|
|
if not amount: |
60
|
|
|
try: |
61
|
|
|
return await self.__anext__() |
62
|
|
|
except StopAsyncIteration: |
|
|
|
|
63
|
|
|
return |
64
|
|
|
results = [] |
65
|
|
|
for i in range(amount): |
66
|
|
|
try: |
67
|
|
|
result = await self.__anext__() |
68
|
|
|
except StopAsyncIteration: |
69
|
|
|
return results |
70
|
|
|
results.append(result) |
71
|
|
|
return results |
72
|
|
|
|
73
|
|
|
|
74
|
|
|
class __(graph_traversal.__): |
75
|
|
|
|
76
|
|
|
graph_traversal = AsyncGraphTraversal |
77
|
|
|
|
78
|
|
|
|
79
|
|
|
class AsyncGraphTraversalSource(graph_traversal.GraphTraversalSource): |
80
|
|
|
|
81
|
|
|
def __init__(self, *args, **kwargs): |
82
|
|
|
super().__init__(*args, **kwargs) |
83
|
|
|
self.graph_traversal = AsyncGraphTraversal |
84
|
|
|
|
85
|
|
|
def withRemote(self, remote_connection): |
86
|
|
|
source = self.get_graph_traversal_source() |
87
|
|
|
source.traversal_strategies.add_strategies([AsyncRemoteStrategy(remote_connection)]) |
88
|
|
|
return source |
89
|
|
|
|
90
|
|
|
def get_graph_traversal_source(self): |
91
|
|
|
return self.__class__( |
92
|
|
|
self.graph, AsyncTraversalStrategies(self.traversal_strategies), |
93
|
|
|
traversal.Bytecode(self.bytecode)) |
94
|
|
|
|