1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
from sqlalchemy.orm import unitofwork
"""Dumps out a string representation of a UOWTask structure"""
class UOWDumper(unitofwork.UOWExecutor):
def __init__(self, task, buf, verbose=False):
self.verbose = verbose
self.indent = 0
self.task = task
self.buf = buf
self.starttask = task
self.headers = {}
self.execute(None, task)
def execute(self, trans, task, isdelete=None):
oldstarttask = self.starttask
oldheaders = self.headers
self.starttask = task
self.headers = {}
try:
i = self._indent()
if len(i):
i += "-"
#i = i[0:-1] + "-"
if task.circular is not None:
self.buf.write(self._indent() + "\n")
self.buf.write(i + " " + self._repr_task(task))
self.buf.write(" (contains cyclical sub-tasks)")
else:
self.buf.write(self._indent() + "\n")
self.buf.write(i + " " + self._repr_task(task))
self.buf.write(" (" + (isdelete and "delete " or "save/update ") + "phase) \n")
self.indent += 1
super(UOWDumper, self).execute(trans, task, isdelete)
finally:
self.indent -= 1
if self.starttask.is_empty():
self.buf.write(self._indent() + " |- (empty task)\n")
else:
self.buf.write(self._indent() + " |----\n")
self.buf.write(self._indent() + "\n")
self.starttask = oldstarttask
self.headers = oldheaders
def save_objects(self, trans, task):
# sort elements to be inserted by insert order
def comparator(a, b):
if a.obj is None:
x = None
elif not hasattr(a.obj, '_sa_insert_order'):
x = None
else:
x = a.obj._sa_insert_order
if b.obj is None:
y = None
elif not hasattr(b.obj, '_sa_insert_order'):
y = None
else:
y = b.obj._sa_insert_order
return cmp(x, y)
l = list(task.polymorphic_tosave_elements)
l.sort(comparator)
for rec in l:
if rec.listonly:
continue
self.header("Save elements"+ self._inheritance_tag(task))
self.buf.write(self._indent() + "- " + self._repr_task_element(rec) + "\n")
self.closeheader()
def delete_objects(self, trans, task):
for rec in task.polymorphic_todelete_elements:
if rec.listonly:
continue
self.header("Delete elements"+ self._inheritance_tag(task))
self.buf.write(self._indent() + "- " + self._repr_task_element(rec) + "\n")
self.closeheader()
def _inheritance_tag(self, task):
if not self.verbose:
return ""
elif task is not self.starttask:
return (" (inheriting task %s)" % self._repr_task(task))
else:
return ""
def header(self, text):
"""Write a given header just once."""
if not self.verbose:
return
try:
self.headers[text]
except KeyError:
self.buf.write(self._indent() + "- " + text + "\n")
self.headers[text] = True
def closeheader(self):
if not self.verbose:
return
self.buf.write(self._indent() + "- ------\n")
def execute_dependency(self, transaction, dep, isdelete):
self._dump_processor(dep, isdelete)
def execute_save_steps(self, trans, task):
super(UOWDumper, self).execute_save_steps(trans, task)
def execute_delete_steps(self, trans, task):
super(UOWDumper, self).execute_delete_steps(trans, task)
def execute_dependencies(self, trans, task, isdelete=None):
super(UOWDumper, self).execute_dependencies(trans, task, isdelete)
def execute_childtasks(self, trans, task, isdelete=None):
self.header("Child tasks" + self._inheritance_tag(task))
super(UOWDumper, self).execute_childtasks(trans, task, isdelete)
self.closeheader()
def execute_cyclical_dependencies(self, trans, task, isdelete):
self.header("Cyclical %s dependencies" % (isdelete and "delete" or "save"))
super(UOWDumper, self).execute_cyclical_dependencies(trans, task, isdelete)
self.closeheader()
def execute_per_element_childtasks(self, trans, task, isdelete):
super(UOWDumper, self).execute_per_element_childtasks(trans, task, isdelete)
def execute_element_childtasks(self, trans, element, isdelete):
self.header("%s subelements of UOWTaskElement(%s)" % ((isdelete and "Delete" or "Save"), hex(id(element))))
super(UOWDumper, self).execute_element_childtasks(trans, element, isdelete)
self.closeheader()
def _dump_processor(self, proc, deletes):
if deletes:
val = proc.targettask.polymorphic_todelete_elements
else:
val = proc.targettask.polymorphic_tosave_elements
if self.verbose:
self.buf.write(self._indent() + " |- %s attribute on %s (UOWDependencyProcessor(%d) processing %s)\n" % (
repr(proc.processor.key),
("%s's to be %s" % (self._repr_task_class(proc.targettask), deletes and "deleted" or "saved")),
hex(id(proc)),
self._repr_task(proc.targettask))
)
elif False:
self.buf.write(self._indent() + " |- %s attribute on %s\n" % (
repr(proc.processor.key),
("%s's to be %s" % (self._repr_task_class(proc.targettask), deletes and "deleted" or "saved")),
)
)
if len(val) == 0:
if self.verbose:
self.buf.write(self._indent() + " |- " + "(no objects)\n")
for v in val:
self.buf.write(self._indent() + " |- " + self._repr_task_element(v, proc.processor.key, process=True) + "\n")
def _repr_task_element(self, te, attribute=None, process=False):
if te.obj is None:
objid = "(placeholder)"
else:
if attribute is not None:
objid = "%s(%s).%s" % (te.obj.__class__.__name__, hex(id(te.obj)), attribute)
else:
objid = "%s(%s)" % (te.obj.__class__.__name__, hex(id(te.obj)))
if self.verbose:
return "%s (UOWTaskElement(%s, %s))" % (objid, hex(id(te)), (te.listonly and 'listonly' or (te.isdelete and 'delete' or 'save')))
elif process:
return "Process %s" % (objid)
else:
return "%s %s" % ((te.isdelete and "Delete" or "Save"), objid)
def _repr_task(self, task):
if task.mapper is not None:
if task.mapper.__class__.__name__ == 'Mapper':
name = task.mapper.class_.__name__ + "/" + task.mapper.local_table.name + "/" + str(task.mapper.entity_name)
else:
name = repr(task.mapper)
else:
name = '(none)'
if task.circular_parent:
return ("UOWTask(%s->%s, %s)" % (hex(id(task.circular_parent)), hex(id(task)), name))
else:
return ("UOWTask(%s, %s)" % (hex(id(task)), name))
def _repr_task_class(self, task):
if task.mapper is not None and task.mapper.__class__.__name__ == 'Mapper':
return task.mapper.class_.__name__
else:
return '(none)'
def _repr(self, obj):
return "%s(%s)" % (obj.__class__.__name__, hex(id(obj)))
def _indent(self):
return " |" * self.indent
|
