Imported Upstream version 2.6.11upstream/2.6.11

1 files changed, 123 insertions, 0 deletions

diff --git a/src/mongo/db/ops/update_executor.cpp b/src/mongo/db/ops/update_executor.cpp
new file mode 100644
index 00000000000..5ae9d7fbd24
--- /dev/null
+++ b/src/mongo/db/ops/update_executor.cpp
@@ -0,0 +1,123 @@
+/**
+ *    Copyright (C) 2014 MongoDB Inc.
+ *
+ *    This program is free software: you can redistribute it and/or  modify
+ *    it under the terms of the GNU Affero General Public License, version 3,
+ *    as published by the Free Software Foundation.
+ *
+ *    This program is distributed in the hope that it will be useful,
+ *    but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *    GNU Affero General Public License for more details.
+ *
+ *    You should have received a copy of the GNU Affero General Public License
+ *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ *    As a special exception, the copyright holders give permission to link the
+ *    code of portions of this program with the OpenSSL library under certain
+ *    conditions as described in each individual source file and distribute
+ *    linked combinations including the program with the OpenSSL library. You
+ *    must comply with the GNU Affero General Public License in all respects for
+ *    all of the code used other than as permitted herein. If you modify file(s)
+ *    with this exception, you may extend this exception to your version of the
+ *    file(s), but you are not obligated to do so. If you do not wish to do so,
+ *    delete this exception statement from your version. If you delete this
+ *    exception statement from all source files in the program, then also delete
+ *    it in the license file.
+ */
+
+#include "mongo/platform/basic.h"
+
+#include "mongo/db/ops/update_executor.h"
+
+#include "mongo/db/ops/update.h"
+#include "mongo/db/ops/update_request.h"
+#include "mongo/db/query/canonical_query.h"
+#include "mongo/util/assert_util.h"
+
+namespace mongo {
+
+    UpdateExecutor::UpdateExecutor(const UpdateRequest* request, OpDebug* opDebug) :
+        _request(request),
+        _opDebug(opDebug),
+        _driver(UpdateDriver::Options()),
+        _canonicalQuery(),
+        _isQueryParsed(false),
+        _isUpdateParsed(false) {
+    }
+
+    UpdateExecutor::~UpdateExecutor() {}
+
+    Status UpdateExecutor::prepare() {
+        // We parse the update portion before the query portion because the dispostion of the update
+        // may determine whether or not we need to produce a CanonicalQuery at all.  For example, if
+        // the update involves the positional-dollar operator, we must have a CanonicalQuery even if
+        // it isn't required for query execution.
+        Status status = parseUpdate();
+        if (!status.isOK())
+            return status;
+        status = parseQuery();
+        if (!status.isOK())
+            return status;
+        return Status::OK();
+    }
+
+    UpdateResult UpdateExecutor::execute() {
+        uassertStatusOK(prepare());
+        return update(*_request,
+                      _opDebug,
+                      &_driver,
+                      _canonicalQuery.release());
+    }
+
+    Status UpdateExecutor::parseQuery() {
+        if (_isQueryParsed)
+            return Status::OK();
+
+        dassert(!_canonicalQuery.get());
+        dassert(_isUpdateParsed);
+
+        if (!_driver.needMatchDetails() && CanonicalQuery::isSimpleIdQuery(_request->getQuery())) {
+            _isQueryParsed = true;
+            return Status::OK();
+        }
+
+        CanonicalQuery* cqRaw;
+        Status status = CanonicalQuery::canonicalize(_request->getNamespaceString().ns(),
+                                                     _request->getQuery(),
+                                                     &cqRaw);
+        if (status.isOK()) {
+            _canonicalQuery.reset(cqRaw);
+            _isQueryParsed = true;
+        }
+        else if (status == ErrorCodes::NoClientContext) {
+            // _isQueryParsed is still false, but execute() will try again under the lock.
+            return status = Status::OK();
+        }
+        return status;
+    }
+
+    Status UpdateExecutor::parseUpdate() {
+        if (_isUpdateParsed)
+            return Status::OK();
+
+        const NamespaceString& ns(_request->getNamespaceString());
+
+        // Should the modifiers validate their embedded docs via okForStorage
+        // Only user updates should be checked. Any system or replication stuff should pass through.
+        // Config db docs shouldn't get checked for valid field names since the shard key can have
+        // a dot (".") in it.
+        const bool shouldValidate = !(_request->isFromReplication() ||
+                                      ns.isConfigDB() ||
+                                      _request->isFromMigration());
+
+        _driver.setLogOp(true);
+        _driver.setModOptions(ModifierInterface::Options(_request->isFromReplication(),
+                                                         shouldValidate));
+        Status status = _driver.parse(_request->getUpdates(), _request->isMulti());
+        if (status.isOK())
+            _isUpdateParsed = true;
+        return status;
+    }
+
+}  // namespace mongo