SERVER-27938 Rename all OperationContext variables to opCtx

This commit is an automated rename of all whole word instances of txn,
_txn, and txnPtr to opCtx, _opCtx, and opCtxPtr, respectively in all
.cpp and .h files in src/mongo.

1 files changed, 73 insertions, 71 deletions

diff --git a/src/mongo/db/cloner.cpp b/src/mongo/db/cloner.cpp
index 6aa2f1cdb33..439d3ac574c 100644
--- a/src/mongo/db/cloner.cpp
+++ b/src/mongo/db/cloner.cpp
@@ -137,24 +137,25 @@ BSONObj Cloner::getIdIndexSpec(const std::list<BSONObj>& indexSpecs) {
 Cloner::Cloner() {}
 
 struct Cloner::Fun {
-    Fun(OperationContext* txn, const string& dbName) : lastLog(0), txn(txn), _dbName(dbName) {}
+    Fun(OperationContext* opCtx, const string& dbName)
+        : lastLog(0), opCtx(opCtx), _dbName(dbName) {}
 
     void operator()(DBClientCursorBatchIterator& i) {
         invariant(from_collection.coll() != "system.indexes");
 
         // XXX: can probably take dblock instead
-        unique_ptr<ScopedTransaction> scopedXact(new ScopedTransaction(txn, MODE_X));
-        unique_ptr<Lock::GlobalWrite> globalWriteLock(new Lock::GlobalWrite(txn->lockState()));
+        unique_ptr<ScopedTransaction> scopedXact(new ScopedTransaction(opCtx, MODE_X));
+        unique_ptr<Lock::GlobalWrite> globalWriteLock(new Lock::GlobalWrite(opCtx->lockState()));
         uassert(
             ErrorCodes::NotMaster,
             str::stream() << "Not primary while cloning collection " << from_collection.ns()
                           << " to "
                           << to_collection.ns(),
-            !txn->writesAreReplicated() ||
-                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(txn, to_collection));
+            !opCtx->writesAreReplicated() ||
+                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(opCtx, to_collection));
 
         // Make sure database still exists after we resume from the temp release
-        Database* db = dbHolder().openDb(txn, _dbName);
+        Database* db = dbHolder().openDb(opCtx, _dbName);
 
         bool createdCollection = false;
         Collection* collection = NULL;
@@ -166,10 +167,10 @@ struct Cloner::Fun {
                                   << "]",
                     !createdCollection);
             MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-                txn->checkForInterrupt();
+                opCtx->checkForInterrupt();
 
-                WriteUnitOfWork wunit(txn);
-                Status s = userCreateNS(txn,
+                WriteUnitOfWork wunit(opCtx);
+                Status s = userCreateNS(opCtx,
                                         db,
                                         to_collection.toString(),
                                         from_options,
@@ -179,7 +180,7 @@ struct Cloner::Fun {
                 wunit.commit();
                 collection = db->getCollection(to_collection);
             }
-            MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "createCollection", to_collection.ns());
+            MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "createCollection", to_collection.ns());
         }
 
         const bool isSystemViewsClone = to_collection.isSystemDotViews();
@@ -193,27 +194,27 @@ struct Cloner::Fun {
                         log() << "clone " << to_collection << ' ' << numSeen;
                     lastLog = now;
                 }
-                txn->checkForInterrupt();
+                opCtx->checkForInterrupt();
 
                 scopedXact.reset();
                 globalWriteLock.reset();
 
-                CurOp::get(txn)->yielded();
+                CurOp::get(opCtx)->yielded();
 
-                scopedXact.reset(new ScopedTransaction(txn, MODE_X));
-                globalWriteLock.reset(new Lock::GlobalWrite(txn->lockState()));
+                scopedXact.reset(new ScopedTransaction(opCtx, MODE_X));
+                globalWriteLock.reset(new Lock::GlobalWrite(opCtx->lockState()));
 
                 // Check if everything is still all right.
-                if (txn->writesAreReplicated()) {
+                if (opCtx->writesAreReplicated()) {
                     uassert(28592,
                             str::stream() << "Cannot write to ns: " << to_collection.ns()
                                           << " after yielding",
                             repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(
-                                txn, to_collection));
+                                opCtx, to_collection));
                 }
 
                 // TODO: SERVER-16598 abort if original db or collection is gone.
-                db = dbHolder().get(txn, _dbName);
+                db = dbHolder().get(opCtx, _dbName);
                 uassert(28593,
                         str::stream() << "Database " << _dbName << " dropped while cloning",
                         db != NULL);
@@ -262,13 +263,13 @@ struct Cloner::Fun {
             verify(collection);
             ++numSeen;
             MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-                txn->checkForInterrupt();
+                opCtx->checkForInterrupt();
 
-                WriteUnitOfWork wunit(txn);
+                WriteUnitOfWork wunit(opCtx);
 
                 BSONObj doc = tmp;
                 OpDebug* const nullOpDebug = nullptr;
-                Status status = collection->insertDocument(txn, doc, nullOpDebug, true);
+                Status status = collection->insertDocument(opCtx, doc, nullOpDebug, true);
                 if (!status.isOK() && status.code() != ErrorCodes::DuplicateKey) {
                     error() << "error: exception cloning object in " << from_collection << ' '
                             << redact(status) << " obj:" << redact(doc);
@@ -278,7 +279,7 @@ struct Cloner::Fun {
                     wunit.commit();
                 }
             }
-            MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "cloner insert", to_collection.ns());
+            MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "cloner insert", to_collection.ns());
             RARELY if (time(0) - saveLast > 60) {
                 log() << numSeen << " objects cloned so far from collection " << from_collection;
                 saveLast = time(0);
@@ -299,7 +300,7 @@ struct Cloner::Fun {
     }
 
     time_t lastLog;
-    OperationContext* txn;
+    OperationContext* opCtx;
     const string _dbName;
 
     int64_t numSeen;
@@ -313,7 +314,7 @@ struct Cloner::Fun {
 
 /* copy the specified collection
 */
-void Cloner::copy(OperationContext* txn,
+void Cloner::copy(OperationContext* opCtx,
                   const string& toDBName,
                   const NamespaceString& from_collection,
                   const BSONObj& from_opts,
@@ -324,7 +325,7 @@ void Cloner::copy(OperationContext* txn,
     LOG(2) << "\t\tcloning collection " << from_collection << " to " << to_collection << " on "
            << _conn->getServerAddress() << " with filter " << redact(query.toString());
 
-    Fun f(txn, toDBName);
+    Fun f(opCtx, toDBName);
     f.numSeen = 0;
     f.from_collection = from_collection;
     f.from_options = from_opts;
@@ -335,7 +336,7 @@ void Cloner::copy(OperationContext* txn,
 
     int options = QueryOption_NoCursorTimeout | (opts.slaveOk ? QueryOption_SlaveOk : 0);
     {
-        Lock::TempRelease tempRelease(txn->lockState());
+        Lock::TempRelease tempRelease(opCtx->lockState());
         _conn->query(stdx::function<void(DBClientCursorBatchIterator&)>(f),
                      from_collection.ns(),
                      query,
@@ -349,11 +350,11 @@ void Cloner::copy(OperationContext* txn,
                           << to_collection.ns()
                           << " with filter "
                           << query.toString(),
-            !txn->writesAreReplicated() ||
-                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(txn, to_collection));
+            !opCtx->writesAreReplicated() ||
+                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(opCtx, to_collection));
 }
 
-void Cloner::copyIndexes(OperationContext* txn,
+void Cloner::copyIndexes(OperationContext* opCtx,
                          const string& toDBName,
                          const NamespaceString& from_collection,
                          const BSONObj& from_opts,
@@ -372,8 +373,8 @@ void Cloner::copyIndexes(OperationContext* txn,
                           << " to "
                           << to_collection.ns()
                           << " (Cloner)",
-            !txn->writesAreReplicated() ||
-                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(txn, to_collection));
+            !opCtx->writesAreReplicated() ||
+                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(opCtx, to_collection));
 
 
     if (indexesToBuild.empty())
@@ -381,16 +382,16 @@ void Cloner::copyIndexes(OperationContext* txn,
 
     // We are under lock here again, so reload the database in case it may have disappeared
     // during the temp release
-    Database* db = dbHolder().openDb(txn, toDBName);
+    Database* db = dbHolder().openDb(opCtx, toDBName);
 
     Collection* collection = db->getCollection(to_collection);
     if (!collection) {
         MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-            txn->checkForInterrupt();
+            opCtx->checkForInterrupt();
 
-            WriteUnitOfWork wunit(txn);
+            WriteUnitOfWork wunit(opCtx);
             Status s = userCreateNS(
-                txn,
+                opCtx,
                 db,
                 to_collection.toString(),
                 from_opts,
@@ -401,7 +402,7 @@ void Cloner::copyIndexes(OperationContext* txn,
             invariant(collection);
             wunit.commit();
         }
-        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "createCollection", to_collection.ns());
+        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "createCollection", to_collection.ns());
     }
 
     // TODO pass the MultiIndexBlock when inserting into the collection rather than building the
@@ -409,7 +410,7 @@ void Cloner::copyIndexes(OperationContext* txn,
     // from creation to completion without yielding to ensure the index and the collection
     // matches. It also wouldn't work on non-empty collections so we would need both
     // implementations anyway as long as that is supported.
-    MultiIndexBlock indexer(txn, collection);
+    MultiIndexBlock indexer(opCtx, collection);
     indexer.allowInterruption();
 
     indexer.removeExistingIndexes(&indexesToBuild);
@@ -419,20 +420,20 @@ void Cloner::copyIndexes(OperationContext* txn,
     auto indexInfoObjs = uassertStatusOK(indexer.init(indexesToBuild));
     uassertStatusOK(indexer.insertAllDocumentsInCollection());
 
-    WriteUnitOfWork wunit(txn);
+    WriteUnitOfWork wunit(opCtx);
     indexer.commit();
-    if (txn->writesAreReplicated()) {
+    if (opCtx->writesAreReplicated()) {
         const string targetSystemIndexesCollectionName = to_collection.getSystemIndexesCollection();
         const char* createIndexNs = targetSystemIndexesCollectionName.c_str();
         for (auto&& infoObj : indexInfoObjs) {
             getGlobalServiceContext()->getOpObserver()->onCreateIndex(
-                txn, createIndexNs, infoObj, false);
+                opCtx, createIndexNs, infoObj, false);
         }
     }
     wunit.commit();
 }
 
-bool Cloner::copyCollection(OperationContext* txn,
+bool Cloner::copyCollection(OperationContext* opCtx,
                             const string& ns,
                             const BSONObj& query,
                             string& errmsg,
@@ -474,22 +475,22 @@ bool Cloner::copyCollection(OperationContext* txn,
     auto sourceIndexes = _conn->getIndexSpecs(nss.ns(), QueryOption_SlaveOk);
     auto idIndexSpec = getIdIndexSpec(sourceIndexes);
 
-    ScopedTransaction transaction(txn, MODE_IX);
-    Lock::DBLock dbWrite(txn->lockState(), dbname, MODE_X);
+    ScopedTransaction transaction(opCtx, MODE_IX);
+    Lock::DBLock dbWrite(opCtx->lockState(), dbname, MODE_X);
 
     uassert(ErrorCodes::PrimarySteppedDown,
             str::stream() << "Not primary while copying collection " << ns << " (Cloner)",
-            !txn->writesAreReplicated() ||
-                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(txn, nss));
+            !opCtx->writesAreReplicated() ||
+                repl::getGlobalReplicationCoordinator()->canAcceptWritesFor(opCtx, nss));
 
-    Database* db = dbHolder().openDb(txn, dbname);
+    Database* db = dbHolder().openDb(opCtx, dbname);
 
     if (shouldCreateCollection) {
         MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-            txn->checkForInterrupt();
+            opCtx->checkForInterrupt();
 
-            WriteUnitOfWork wunit(txn);
-            Status status = userCreateNS(txn, db, ns, options, true, idIndexSpec);
+            WriteUnitOfWork wunit(opCtx);
+            Status status = userCreateNS(opCtx, db, ns, options, true, idIndexSpec);
             if (!status.isOK()) {
                 errmsg = status.toString();
                 // abort write unit of work
@@ -497,7 +498,7 @@ bool Cloner::copyCollection(OperationContext* txn,
             }
             wunit.commit();
         }
-        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "createCollection", ns);
+        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "createCollection", ns);
     } else {
         LOG(1) << "No collection info found for ns:" << nss.toString()
                << ", host:" << _conn->getServerAddress();
@@ -506,7 +507,7 @@ bool Cloner::copyCollection(OperationContext* txn,
     // main data
     CloneOptions opts;
     opts.slaveOk = true;
-    copy(txn, dbname, nss, options, idIndexSpec, nss, opts, Query(query).snapshot());
+    copy(opCtx, dbname, nss, options, idIndexSpec, nss, opts, Query(query).snapshot());
 
     /* TODO : copyIndexes bool does not seem to be implemented! */
     if (!shouldCopyIndexes) {
@@ -514,7 +515,7 @@ bool Cloner::copyCollection(OperationContext* txn,
     }
 
     // indexes
-    copyIndexes(txn, dbname, NamespaceString(ns), options, sourceIndexes, NamespaceString(ns));
+    copyIndexes(opCtx, dbname, NamespaceString(ns), options, sourceIndexes, NamespaceString(ns));
 
     return true;
 }
@@ -564,21 +565,21 @@ StatusWith<std::vector<BSONObj>> Cloner::filterCollectionsForClone(
 }
 
 Status Cloner::createCollectionsForDb(
-    OperationContext* txn,
+    OperationContext* opCtx,
     const std::vector<CreateCollectionParams>& createCollectionParams,
     const std::string& dbName) {
-    Database* db = dbHolder().openDb(txn, dbName);
+    Database* db = dbHolder().openDb(opCtx, dbName);
     for (auto&& params : createCollectionParams) {
         auto options = params.collectionInfo["options"].Obj();
         const NamespaceString nss(dbName, params.collectionName);
 
         uassertStatusOK(userAllowedCreateNS(dbName, params.collectionName));
         MONGO_WRITE_CONFLICT_RETRY_LOOP_BEGIN {
-            txn->checkForInterrupt();
-            WriteUnitOfWork wunit(txn);
+            opCtx->checkForInterrupt();
+            WriteUnitOfWork wunit(opCtx);
 
             Status createStatus =
-                userCreateNS(txn,
+                userCreateNS(opCtx,
                              db,
                              nss.ns(),
                              options,
@@ -590,12 +591,12 @@ Status Cloner::createCollectionsForDb(
 
             wunit.commit();
         }
-        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(txn, "createCollection", nss.ns());
+        MONGO_WRITE_CONFLICT_RETRY_LOOP_END(opCtx, "createCollection", nss.ns());
     }
     return Status::OK();
 }
 
-Status Cloner::copyDb(OperationContext* txn,
+Status Cloner::copyDb(OperationContext* opCtx,
                       const std::string& toDBName,
                       const string& masterHost,
                       const CloneOptions& opts,
@@ -603,7 +604,7 @@ Status Cloner::copyDb(OperationContext* txn,
                       std::vector<BSONObj> collectionsToClone) {
     massert(10289,
             "useReplAuth is not written to replication log",
-            !opts.useReplAuth || !txn->writesAreReplicated());
+            !opts.useReplAuth || !opCtx->writesAreReplicated());
 
     auto statusWithMasterHost = ConnectionString::parse(masterHost);
     if (!statusWithMasterHost.isOK()) {
@@ -616,7 +617,7 @@ Status Cloner::copyDb(OperationContext* txn,
     std::vector<HostAndPort> csServers = cs.getServers();
     for (std::vector<HostAndPort>::const_iterator iter = csServers.begin(); iter != csServers.end();
          ++iter) {
-        if (!repl::isSelf(*iter, txn->getServiceContext()))
+        if (!repl::isSelf(*iter, opCtx->getServiceContext()))
             continue;
 
         masterSameProcess = true;
@@ -648,7 +649,7 @@ Status Cloner::copyDb(OperationContext* txn,
 
             _conn = std::move(con);
         } else {
-            _conn.reset(new DBDirectClient(txn));
+            _conn.reset(new DBDirectClient(opCtx));
         }
     }
 
@@ -661,7 +662,7 @@ Status Cloner::copyDb(OperationContext* txn,
     if (opts.createCollections) {
         // getCollectionInfos may make a remote call, which may block indefinitely, so release
         // the global lock that we are entering with.
-        Lock::TempRelease tempRelease(txn->lockState());
+        Lock::TempRelease tempRelease(opCtx->lockState());
         std::list<BSONObj> initialCollections = _conn->getCollectionInfos(
             opts.fromDB, ListCollectionsFilter::makeTypeCollectionFilter());
         auto status = filterCollectionsForClone(opts, initialCollections);
@@ -687,7 +688,7 @@ Status Cloner::copyDb(OperationContext* txn,
     // Get index specs for each collection.
     std::map<StringData, std::list<BSONObj>> collectionIndexSpecs;
     {
-        Lock::TempRelease tempRelease(txn->lockState());
+        Lock::TempRelease tempRelease(opCtx->lockState());
         for (auto&& params : createCollectionParams) {
             const NamespaceString nss(opts.fromDB, params.collectionName);
             auto indexSpecs =
@@ -701,15 +702,16 @@ Status Cloner::copyDb(OperationContext* txn,
         }
     }
 
-    uassert(ErrorCodes::NotMaster,
-            str::stream() << "Not primary while cloning database " << opts.fromDB
-                          << " (after getting list of collections to clone)",
-            !txn->writesAreReplicated() ||
-                repl::getGlobalReplicationCoordinator()->canAcceptWritesForDatabase(txn, toDBName));
+    uassert(
+        ErrorCodes::NotMaster,
+        str::stream() << "Not primary while cloning database " << opts.fromDB
+                      << " (after getting list of collections to clone)",
+        !opCtx->writesAreReplicated() ||
+            repl::getGlobalReplicationCoordinator()->canAcceptWritesForDatabase(opCtx, toDBName));
 
     if (opts.syncData) {
         if (opts.createCollections) {
-            Status status = createCollectionsForDb(txn, createCollectionParams, toDBName);
+            Status status = createCollectionsForDb(opCtx, createCollectionParams, toDBName);
             if (!status.isOK()) {
                 return status;
             }
@@ -729,7 +731,7 @@ Status Cloner::copyDb(OperationContext* txn,
             if (opts.snapshot)
                 q.snapshot();
 
-            copy(txn,
+            copy(opCtx,
                  toDBName,
                  from_name,
                  params.collectionInfo["options"].Obj(),
@@ -749,7 +751,7 @@ Status Cloner::copyDb(OperationContext* txn,
             const NamespaceString to_name(toDBName, params.collectionName);
 
 
-            copyIndexes(txn,
+            copyIndexes(opCtx,
                         toDBName,
                         from_name,
                         params.collectionInfo["options"].Obj(),