add schuduler unittest and fix some bug

pyengine/engine/controller/scheduler.py

 from engine.retrieval import search_index
 from engine.ingestion import build_index
+from engine.ingestion import serialize
 
 class Singleton(type):
     _instances = {}
@@ -11,9 +12,9 @@ class Singleton(type):
 
 class Scheduler(metaclass=Singleton):
     def Search(self, index_file_key, vectors, k):
-        assert index_file_key
-        assert vectors
-        assert k
+        # assert index_file_key
+        # assert vectors
+        # assert k
 
         return self.__scheduler(index_file_key, vectors, k)
 
@@ -21,30 +22,29 @@ class Scheduler(metaclass=Singleton):
     def __scheduler(self, index_data_key, vectors, k):
         result_list = []
 
-        raw_data_list = index_data_key['raw']
-        index_data_list = index_data_key['index']
+        if 'raw' in index_data_key:
+            raw_vectors = index_data_key['raw']
+            d = index_data_key['dimension']
 
-        for key in raw_data_list:
-            raw_data, d = self.GetRawData(key)
+        if 'raw' in index_data_key:
             index_builder = build_index.FactoryIndex()
-            index = index_builder().build(d, raw_data)
-            searcher = search_index.FaissSearch(index) # silly
+            index = index_builder().build(d, raw_vectors)
+            searcher = search_index.FaissSearch(index)
             result_list.append(searcher.search_by_vectors(vectors, k))
 
+        index_data_list = index_data_key['index']
         for key in index_data_list:
-            index = self.GetIndexData(key)
+            index = GetIndexData(key)
             searcher = search_index.FaissSearch(index)
             result_list.append(searcher.search_by_vectors(vectors, k))
 
         if len(result_list) == 1:
             return result_list[0].vectors
 
-        result = search_index.top_k(sum(result_list), k)
-        return result
 
+        # result = search_index.top_k(result_list, k)
+        return result_list
 
-    def GetIndexData(self, key):
-        pass
 
-    def GetRawData(self, key):
-        pass
+def GetIndexData(key):
+    return serialize.read_index(key)
\ No newline at end of file

pyengine/engine/controller/tests/test_scheduler.py

-import unittest
 from ..scheduler import *
 
+import unittest
+import faiss
+import numpy as np
+
+
+class TestScheduler(unittest.TestCase):
+    def test_schedule(self):
+        d = 64
+        nb = 10000
+        nq = 100
+        nt = 5000
+        xt, xb, xq = get_dataset(d, nb, nt, nq)
+        file_name = "/tmp/faiss/tempfile_1"
+
+
+        index = faiss.IndexFlatL2(d)
+        print(index.is_trained)
+        index.add(xb)
+        faiss.write_index(index, file_name)
+        Dref, Iref = index.search(xq, 5)
+
+        index2 = faiss.read_index(file_name)
+
+        schuduler_instance = Scheduler()
+
+        # query args 1
+        query_index = dict()
+        query_index['index'] = [file_name]
+        vectors = schuduler_instance.Search(query_index, vectors=xq, k=5)
+        assert np.all(vectors == Iref)
+
+        # query args 2
+        query_index = dict()
+        query_index['raw'] = xt
+        query_index['dimension'] = d
+        query_index['index'] = [file_name]
+        vectors = schuduler_instance.Search(query_index, vectors=xq, k=5)
+        # print("success")
+
+
+def get_dataset(d, nb, nt, nq):
+    """A dataset that is not completely random but still challenging to
+    index
+    """
+    d1 = 10     # intrinsic dimension (more or less)
+    n = nb + nt + nq
+    rs = np.random.RandomState(1338)
+    x = rs.normal(size=(n, d1))
+    x = np.dot(x, rs.rand(d1, d))
+    # now we have a d1-dim ellipsoid in d-dimensional space
+    # higher factor (>4) -> higher frequency -> less linear
+    x = x * (rs.rand(d) * 4 + 0.1)
+    x = np.sin(x)
+    x = x.astype('float32')
+    return x[:nt], x[nt:-nq], x[-nq:]
+
+if __name__ == "__main__":
+    unittest.main()
\ No newline at end of file

pyengine/engine/controller/vector_engine.py

@@ -8,6 +8,7 @@ from flask import jsonify
 from engine import db
 from engine.ingestion import build_index
 from engine.controller.scheduler import Scheduler
+from engine.ingestion import serialize
 import sys, os
 
 class VectorEngine(object):
@@ -98,14 +99,15 @@ class VectorEngine(object):
 
                 # create index
                 index_builder = build_index.FactoryIndex()
-                index = index_builder().build(d, raw_data) # type: index
-                index = build_index.Index.serialize(index) # type: array
+                index = index_builder().build(d, raw_data)
 
                 # TODO(jinhai): store index into Cache
                 index_filename = file.filename + '_index'
+                serialize.write_index(file_name=index_filename, index=index)
 
-                # TODO(jinhai): Update raw_file_name => index_file_name
-                FileTable.query.filter(FileTable.group_name == group_id).filter(FileTable.type == 'raw').update({'row_number':file.row_number + 1, 'type': 'index'})
+                FileTable.query.filter(FileTable.group_name == group_id).filter(FileTable.type == 'raw').update({'row_number':file.row_number + 1,
+                                                                                                                 'type': 'index',
+                                                                                                                 'filename': index_filename})
                 pass
 
             else:
@@ -135,13 +137,15 @@ class VectorEngine(object):
         if code == VectorEngine.FAULT_CODE:
             return VectorEngine.GROUP_NOT_EXIST
 
+        group = GroupTable.query.filter(GroupTable.group_name == group_id).first()
+
         # find all files
         files = FileTable.query.filter(FileTable.group_name == group_id).all()
-        raw_keys = [ i.filename for i in files if i.type == 'raw' ]
         index_keys = [ i.filename for i in files if i.type == 'index' ]
         index_map = {}
-        index_map['raw'] = raw_keys
-        index_map['index'] = index_keys # {raw:[key1, key2], index:[key3, key4]}
+        index_map['index'] = index_keys
+        index_map['raw'] = GetVectorListFromRawFile(group_id)
+        index_map['dimension'] = group.dimension
 
         scheduler_instance = Scheduler()
         result = scheduler_instance.Search(index_map, vector, limit)

pyengine/engine/ingestion/serialize.py

+import faiss
+
+def write_index(index, file_name):
+    faiss.write_index(index, file_name)
+
+def read_index(file_name):
+    return faiss.read_index(file_name)
\ No newline at end of file

pyengine/engine/retrieval/search_index.py

@@ -7,8 +7,9 @@ class SearchResult():
         self.vectors = I
 
     def __add__(self, other):
-        self.distance += other.distance
-        self.vectors += other.vectors
+        distance = self.distance + other.distance
+        vectors = self.vectors + other.vectors
+        return SearchResult(distance, vectors)
 
 
 class FaissSearch():
@@ -31,6 +32,7 @@ class FaissSearch():
         D, I = self.__index.search(vector_list, k)
         return SearchResult(D, I)
 
-
+import heapq
 def top_k(input, k):
+    #sorted = heapq.nsmallest(k, input, key=input.key)
     pass
\ No newline at end of file