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
|
/**
* Tests that point-in-time pre- and post-images are retrieved for update/replace/delete operations
* performed in a transaction and non-atomic "applyOps" command.
* @tags: [
* requires_fcv_60,
* uses_transactions,
* ]
*/
(function() {
"use strict";
load("jstests/libs/change_stream_util.js"); // For ChangeStreamTest.
load("jstests/libs/collection_drop_recreate.js"); // For assertDropAndRecreateCollection.
load("jstests/libs/fixture_helpers.js"); // For FixtureHelpers.isMongos.
load("jstests/libs/transactions_util.js"); // For TransactionsUtil.runInTransaction.
const testDB = db.getSiblingDB(jsTestName());
const cst = new ChangeStreamTest(testDB);
const coll = assertDropAndRecreateCollection(
testDB, "coll", {changeStreamPreAndPostImages: {enabled: true}});
const collOther = assertDropAndRecreateCollection(testDB, "coll_regular");
// Verifies that change stream cursor 'changeStreamCursor' returns events defined in array
// 'expectedEvents' in any order.
function assertChangeEventsReturned(changeStreamCursor, expectedEvents) {
function toChangeEvent(event) {
const {_id, operationType, preImage, postImage} = event;
let result = {
documentKey: {_id},
ns: {db: testDB.getName(), coll: coll.getName()},
operationType,
};
if (preImage != undefined) {
result.fullDocumentBeforeChange = preImage;
}
if (postImage != undefined) {
result.fullDocument = postImage;
}
return result;
}
cst.assertNextChangesEqualUnordered(
{cursor: changeStreamCursor, expectedChanges: expectedEvents.map(toChangeEvent)});
}
assert.commandWorked(coll.insert([{_id: 1, a: 1}, {_id: 2, a: 1}, {_id: 3, a: 1}]));
// Open a change stream on the test collection with pre- and post-images requested.
const changeStreamCursor = cst.startWatchingChanges({
pipeline: [
{$changeStream: {fullDocumentBeforeChange: 'whenAvailable', fullDocument: 'whenAvailable'}}
],
collection: coll
});
// Gets collections used in the test for database 'db'. In some passthroughs the collections get
// sharded on 'getCollection()' invocation and it must happen when a transaction is not active.
function getCollections(db) {
return {coll: db[coll.getName()], otherColl: db[collOther.getName()]};
}
jsTestLog("Testing a transaction consisting of a single 'applyOps' entry.");
TransactionsUtil.runInTransaction(testDB, getCollections, function(db, {coll, otherColl}) {
assert.commandWorked(coll.updateOne({_id: 1}, {$inc: {a: 1}}));
assert.commandWorked(coll.replaceOne({_id: 2}, {a: "Long string"}));
assert.commandWorked(coll.deleteOne({_id: 3}));
});
assertChangeEventsReturned(changeStreamCursor, [
{_id: 1, operationType: "update", preImage: {_id: 1, a: 1}, postImage: {_id: 1, a: 2}},
{
_id: 2,
operationType: "replace",
preImage: {_id: 2, a: 1},
postImage: {_id: 2, a: "Long string"}
},
{_id: 3, operationType: "delete", preImage: {_id: 3, a: 1}},
]);
jsTestLog("Testing a transaction consisting of multiple 'applyOps' entries.");
const largeStringSizeInBytes = 15 * 1024 * 1024;
const largeString = "b".repeat(largeStringSizeInBytes);
assert.commandWorked(coll.insert([{_id: 3, a: 1}]));
TransactionsUtil.runInTransaction(testDB, getCollections, function(db, {coll, otherColl}) {
assert.commandWorked(otherColl.insert({b: largeString}));
assert.commandWorked(coll.updateOne({_id: 1}, {$inc: {a: 1}}));
assert.commandWorked(otherColl.insert({b: largeString}));
assert.commandWorked(coll.replaceOne({_id: 2}, {a: 1}));
// Issue a second modification operation on the same document within the transaction.
assert.commandWorked(coll.updateOne({_id: 2}, {$inc: {a: 1}}));
assert.commandWorked(coll.deleteOne({_id: 3}));
assert.commandWorked(otherColl.insert({b: largeString}));
});
assertChangeEventsReturned(changeStreamCursor, [
{_id: 3, operationType: "insert", postImage: {_id: 3, a: 1}},
{_id: 1, operationType: "update", preImage: {_id: 1, a: 2}, postImage: {_id: 1, a: 3}},
{
_id: 2,
operationType: "replace",
preImage: {_id: 2, a: "Long string"},
postImage: {_id: 2, a: 1}
},
{_id: 2, operationType: "update", preImage: {_id: 2, a: 1}, postImage: {_id: 2, a: 2}},
{_id: 3, operationType: "delete", preImage: {_id: 3, a: 1}},
]);
jsTestLog("Testing a transaction consisting of multiple 'applyOps' entries with large pre-images.");
const largePreImageSizeInBytes = 7 * 1024 * 1024;
const largePreImageValue = "c".repeat(largePreImageSizeInBytes);
assert.commandWorked(coll.insert([{_id: 3, a: largePreImageValue}]));
TransactionsUtil.runInTransaction(testDB, getCollections, function(db, {coll, otherColl}) {
assert.commandWorked(coll.updateOne({_id: 3}, {$set: {b: 1}}));
assert.commandWorked(coll.deleteOne({_id: 3}));
});
assertChangeEventsReturned(changeStreamCursor, [
{_id: 3, operationType: "insert", postImage: {_id: 3, a: largePreImageValue}},
{
_id: 3,
operationType: "update",
preImage: {_id: 3, a: largePreImageValue},
postImage: {_id: 3, a: largePreImageValue, b: 1}
},
{
_id: 3,
operationType: "delete",
preImage: {_id: 3, a: largePreImageValue, b: 1},
},
]);
// "applyOps" command can only be issued on a replica set.
if (!FixtureHelpers.isMongos(testDB)) {
jsTestLog("Testing non-atomic 'applyOps' command.");
assert.commandWorked(coll.insert([{_id: 5, a: 1}, {_id: 6, a: 1}]));
assert.commandWorked(testDB.runCommand({
applyOps: [
{op: "u", ns: coll.getFullName(), o2: {_id: 5}, o: {$v: 2, diff: {u: {a: 2}}}},
{op: "d", ns: coll.getFullName(), o: {_id: 6}}
],
allowAtomic: false,
}));
assertChangeEventsReturned(changeStreamCursor, [
{_id: 5, operationType: "insert", postImage: {_id: 5, a: 1}},
{_id: 6, operationType: "insert", postImage: {_id: 6, a: 1}},
{_id: 5, operationType: "update", preImage: {_id: 5, a: 1}, postImage: {_id: 5, a: 2}},
{_id: 6, operationType: "delete", preImage: {_id: 6, a: 1}},
]);
}
})();
|
