1
2 /**
3 * Copyright (C) 2018-present MongoDB, Inc.
4 *
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the Server Side Public License, version 1,
7 * as published by MongoDB, Inc.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * Server Side Public License for more details.
13 *
14 * You should have received a copy of the Server Side Public License
15 * along with this program. If not, see
16 * <http://www.mongodb.com/licensing/server-side-public-license>.
17 *
18 * As a special exception, the copyright holders give permission to link the
19 * code of portions of this program with the OpenSSL library under certain
20 * conditions as described in each individual source file and distribute
21 * linked combinations including the program with the OpenSSL library. You
22 * must comply with the Server Side Public License in all respects for
23 * all of the code used other than as permitted herein. If you modify file(s)
24 * with this exception, you may extend this exception to your version of the
25 * file(s), but you are not obligated to do so. If you do not wish to do so,
26 * delete this exception statement from your version. If you delete this
27 * exception statement from all source files in the program, then also delete
28 * it in the license file.
29 */
30
31 #include "mongo/platform/basic.h"
32
33 #include "mongo/s/client/shard_local.h"
34
35 #include "mongo/client/read_preference.h"
36 #include "mongo/db/catalog/catalog_raii.h"
37 #include "mongo/db/client.h"
38 #include "mongo/db/query/cursor_response.h"
39 #include "mongo/db/query/find_and_modify_request.h"
40 #include "mongo/db/repl/replication_coordinator_global.h"
41 #include "mongo/db/repl/replication_coordinator_mock.h"
42 #include "mongo/db/service_context_d_test_fixture.h"
43 #include "mongo/db/write_concern_options.h"
44 #include "mongo/s/client/shard_registry.h"
45 #include "mongo/stdx/memory.h"
46
47 namespace mongo {
48 namespace {
49
50 class ShardLocalTest : public ServiceContextMongoDTest {
51 protected:
52 ServiceContext::UniqueOperationContext _opCtx;
53 std::unique_ptr<ShardLocal> _shardLocal;
54
55 /**
56 * Sets up and runs a FindAndModify command with ShardLocal's runCommand. Finds a document in
57 * namespace "nss" that matches "find" and updates the document with "set". Upsert and new are
58 * set to true in the FindAndModify request.
59 */
60 StatusWith<Shard::CommandResponse> runFindAndModifyRunCommand(NamespaceString nss,
61 BSONObj find,
62 BSONObj set);
63 /**
64 * Facilitates running a find query by supplying the redundant parameters. Finds documents in
65 * namespace "nss" that match "query" and returns "limit" (if there are that many) number of
66 * documents in "sort" order.
67 */
68 StatusWith<Shard::QueryResponse> runFindQuery(NamespaceString nss,
69 BSONObj query,
70 BSONObj sort,
71 boost::optional<long long> limit);
72
73 /**
74 * Returns the index definitions that exist for the given collection.
75 */
76 StatusWith<std::vector<BSONObj>> getIndexes(NamespaceString nss);
77
78 private:
79 void setUp() override;
80 void tearDown() override;
81 };
82
setUp()83 void ShardLocalTest::setUp() {
84 ServiceContextMongoDTest::setUp();
85 Client::initThreadIfNotAlready();
86 _opCtx = getGlobalServiceContext()->makeOperationContext(&cc());
87 serverGlobalParams.clusterRole = ClusterRole::ConfigServer;
88 _shardLocal = stdx::make_unique<ShardLocal>(ShardRegistry::kConfigServerShardId);
89 const repl::ReplSettings replSettings = {};
90 repl::setGlobalReplicationCoordinator(
91 new repl::ReplicationCoordinatorMock(_opCtx->getServiceContext(), replSettings));
92 ASSERT_OK(
93 repl::getGlobalReplicationCoordinator()->setFollowerMode(repl::MemberState::RS_PRIMARY));
94 }
95
tearDown()96 void ShardLocalTest::tearDown() {
97 _opCtx.reset();
98 ServiceContextMongoDTest::tearDown();
99 repl::setGlobalReplicationCoordinator(nullptr);
100 }
101
runFindAndModifyRunCommand(NamespaceString nss,BSONObj find,BSONObj set)102 StatusWith<Shard::CommandResponse> ShardLocalTest::runFindAndModifyRunCommand(NamespaceString nss,
103 BSONObj find,
104 BSONObj set) {
105 FindAndModifyRequest findAndModifyRequest = FindAndModifyRequest::makeUpdate(nss, find, set);
106 findAndModifyRequest.setUpsert(true);
107 findAndModifyRequest.setShouldReturnNew(true);
108 findAndModifyRequest.setWriteConcern(WriteConcernOptions(
109 WriteConcernOptions::kMajority, WriteConcernOptions::SyncMode::UNSET, Seconds(15)));
110
111 return _shardLocal->runCommandWithFixedRetryAttempts(
112 _opCtx.get(),
113 ReadPreferenceSetting{ReadPreference::PrimaryOnly},
114 nss.db().toString(),
115 findAndModifyRequest.toBSON(),
116 Shard::RetryPolicy::kNoRetry);
117 }
118
getIndexes(NamespaceString nss)119 StatusWith<std::vector<BSONObj>> ShardLocalTest::getIndexes(NamespaceString nss) {
120 auto response = _shardLocal->runCommandWithFixedRetryAttempts(
121 _opCtx.get(),
122 ReadPreferenceSetting{ReadPreference::PrimaryOnly},
123 nss.db().toString(),
124 BSON("listIndexes" << nss.coll().toString()),
125 Shard::RetryPolicy::kIdempotent);
126 if (!response.isOK()) {
127 return response.getStatus();
128 }
129 if (!response.getValue().commandStatus.isOK()) {
130 return response.getValue().commandStatus;
131 }
132
133 auto cursorResponse = CursorResponse::parseFromBSON(response.getValue().response);
134 if (!cursorResponse.isOK()) {
135 return cursorResponse.getStatus();
136 }
137 return cursorResponse.getValue().getBatch();
138 }
139
140 /**
141 * Takes a FindAndModify command's BSON response and parses it for the returned "value" field.
142 */
extractFindAndModifyNewObj(const BSONObj & responseObj)143 BSONObj extractFindAndModifyNewObj(const BSONObj& responseObj) {
144 const auto& newDocElem = responseObj["value"];
145 ASSERT(!newDocElem.eoo());
146 ASSERT(newDocElem.isABSONObj());
147 return newDocElem.Obj();
148 }
149
runFindQuery(NamespaceString nss,BSONObj query,BSONObj sort,boost::optional<long long> limit)150 StatusWith<Shard::QueryResponse> ShardLocalTest::runFindQuery(NamespaceString nss,
151 BSONObj query,
152 BSONObj sort,
153 boost::optional<long long> limit) {
154 return _shardLocal->exhaustiveFindOnConfig(_opCtx.get(),
155 ReadPreferenceSetting{ReadPreference::PrimaryOnly},
156 repl::ReadConcernLevel::kMajorityReadConcern,
157 nss,
158 query,
159 sort,
160 limit);
161 }
162
TEST_F(ShardLocalTest,RunCommand)163 TEST_F(ShardLocalTest, RunCommand) {
164 NamespaceString nss("admin.bar");
165 StatusWith<Shard::CommandResponse> findAndModifyResponse = runFindAndModifyRunCommand(
166 nss, BSON("fooItem" << 1), BSON("$set" << BSON("fooRandom" << 254)));
167
168 Shard::CommandResponse commandResponse = unittest::assertGet(findAndModifyResponse);
169 BSONObj newDocument = extractFindAndModifyNewObj(commandResponse.response);
170
171 ASSERT_EQUALS(1, newDocument["fooItem"].numberInt());
172 ASSERT_EQUALS(254, newDocument["fooRandom"].numberInt());
173 }
174
TEST_F(ShardLocalTest,FindOneWithoutLimit)175 TEST_F(ShardLocalTest, FindOneWithoutLimit) {
176 NamespaceString nss("admin.bar");
177
178 // Set up documents to be queried.
179 StatusWith<Shard::CommandResponse> findAndModifyResponse = runFindAndModifyRunCommand(
180 nss, BSON("fooItem" << 1), BSON("$set" << BSON("fooRandom" << 254)));
181 ASSERT_OK(findAndModifyResponse.getStatus());
182 findAndModifyResponse = runFindAndModifyRunCommand(
183 nss, BSON("fooItem" << 3), BSON("$set" << BSON("fooRandom" << 452)));
184 ASSERT_OK(findAndModifyResponse.getStatus());
185
186 // Find a single document.
187 StatusWith<Shard::QueryResponse> response =
188 runFindQuery(nss, BSON("fooItem" << 3), BSONObj(), boost::none);
189 Shard::QueryResponse queryResponse = unittest::assertGet(response);
190
191 std::vector<BSONObj> docs = queryResponse.docs;
192 const unsigned long size = 1;
193 ASSERT_EQUALS(size, docs.size());
194 BSONObj foundDoc = docs[0];
195 ASSERT_EQUALS(3, foundDoc["fooItem"].numberInt());
196 ASSERT_EQUALS(452, foundDoc["fooRandom"].numberInt());
197 }
198
TEST_F(ShardLocalTest,FindManyWithLimit)199 TEST_F(ShardLocalTest, FindManyWithLimit) {
200 NamespaceString nss("admin.bar");
201
202 // Set up documents to be queried.
203 StatusWith<Shard::CommandResponse> findAndModifyResponse = runFindAndModifyRunCommand(
204 nss, BSON("fooItem" << 1), BSON("$set" << BSON("fooRandom" << 254)));
205 ASSERT_OK(findAndModifyResponse.getStatus());
206 findAndModifyResponse = runFindAndModifyRunCommand(
207 nss, BSON("fooItem" << 2), BSON("$set" << BSON("fooRandom" << 444)));
208 ASSERT_OK(findAndModifyResponse.getStatus());
209 findAndModifyResponse = runFindAndModifyRunCommand(
210 nss, BSON("fooItem" << 3), BSON("$set" << BSON("fooRandom" << 452)));
211 ASSERT_OK(findAndModifyResponse.getStatus());
212
213 // Find 2 of 3 documents.
214 StatusWith<Shard::QueryResponse> response =
215 runFindQuery(nss, BSONObj(), BSON("fooItem" << 1), 2LL);
216 Shard::QueryResponse queryResponse = unittest::assertGet(response);
217
218 std::vector<BSONObj> docs = queryResponse.docs;
219 const unsigned long size = 2;
220 ASSERT_EQUALS(size, docs.size());
221 BSONObj firstDoc = docs[0];
222 ASSERT_EQUALS(1, firstDoc["fooItem"].numberInt());
223 ASSERT_EQUALS(254, firstDoc["fooRandom"].numberInt());
224 BSONObj secondDoc = docs[1];
225 ASSERT_EQUALS(2, secondDoc["fooItem"].numberInt());
226 ASSERT_EQUALS(444, secondDoc["fooRandom"].numberInt());
227 }
228
TEST_F(ShardLocalTest,FindNoMatchingDocumentsEmpty)229 TEST_F(ShardLocalTest, FindNoMatchingDocumentsEmpty) {
230 NamespaceString nss("admin.bar");
231
232 // Set up a document.
233 StatusWith<Shard::CommandResponse> findAndModifyResponse = runFindAndModifyRunCommand(
234 nss, BSON("fooItem" << 1), BSON("$set" << BSON("fooRandom" << 254)));
235 ASSERT_OK(findAndModifyResponse.getStatus());
236
237 // Run a query that won't find any results.
238 StatusWith<Shard::QueryResponse> response =
239 runFindQuery(nss, BSON("fooItem" << 3), BSONObj(), boost::none);
240 Shard::QueryResponse queryResponse = unittest::assertGet(response);
241
242 std::vector<BSONObj> docs = queryResponse.docs;
243 const unsigned long size = 0;
244 ASSERT_EQUALS(size, docs.size());
245 }
246
TEST_F(ShardLocalTest,CreateIndex)247 TEST_F(ShardLocalTest, CreateIndex) {
248 NamespaceString nss("config.foo");
249
250 ASSERT_EQUALS(ErrorCodes::NamespaceNotFound, getIndexes(nss).getStatus());
251
252 Status status =
253 _shardLocal->createIndexOnConfig(_opCtx.get(), nss, BSON("a" << 1 << "b" << 1), true);
254 // Creating the index should implicitly create the collection
255 ASSERT_OK(status);
256
257 auto indexes = unittest::assertGet(getIndexes(nss));
258 // There should be the index we just added as well as the _id index
259 ASSERT_EQ(2U, indexes.size());
260
261 // Making an identical index should be a no-op.
262 status = _shardLocal->createIndexOnConfig(_opCtx.get(), nss, BSON("a" << 1 << "b" << 1), true);
263 ASSERT_OK(status);
264 indexes = unittest::assertGet(getIndexes(nss));
265 ASSERT_EQ(2U, indexes.size());
266
267 // Trying to make the same index as non-unique should fail.
268 status = _shardLocal->createIndexOnConfig(_opCtx.get(), nss, BSON("a" << 1 << "b" << 1), false);
269 ASSERT_EQUALS(ErrorCodes::IndexOptionsConflict, status);
270 indexes = unittest::assertGet(getIndexes(nss));
271 ASSERT_EQ(2U, indexes.size());
272 }
273
274 } // namespace
275 } // namespace mongo
276