[2435] Updating after getting RRsetCollection on DatabaseUpdater must fail

src/lib/datasrc/database.cc

@@ -1600,6 +1600,14 @@ isNSEC3KindType(RRType rrtype, const Rdata& rdata) {
 
 void
 DatabaseUpdater::addRRset(const AbstractRRset& rrset) {
+    if (rrset_collection_) {
+        isc_throw(InvalidOperation,
+                  "Cannot add RRset after an RRsetCollection has been "
+                  "requested for ZoneUpdater for "
+                  << zone_name_ << "/" << zone_class_ << " on "
+                  << db_name_);
+    }
+
     validateAddOrDelete("add", rrset, DELETE, ADD);
 
     // It's guaranteed rrset has at least one RDATA at this point.
@@ -1650,6 +1658,14 @@ DatabaseUpdater::addRRset(const AbstractRRset& rrset) {
 
 void
 DatabaseUpdater::deleteRRset(const AbstractRRset& rrset) {
+    if (rrset_collection_) {
+        isc_throw(InvalidOperation,
+                  "Cannot delete RRset after an RRsetCollection has been "
+                  "requested for ZoneUpdater for "
+                  << zone_name_ << "/" << zone_class_ << " on "
+                  << db_name_);
+    }
+
     // If this is the first operation, pretend we are starting a new delete
     // sequence after adds.  This will simplify the validation below.
     if (diff_phase_ == NOT_STARTED) {

src/lib/datasrc/tests/database_unittest.cc

@@ -4291,4 +4291,54 @@ TEST_F(MockRRsetCollectionTest, findError) {
     }, RRsetCollectionError);
 }
 
+TYPED_TEST_CASE(RRsetCollectionAndUpdaterTest, TestAccessorTypes);
+
+// This test fixture is templated so that we can share (most of) the test
+// cases with different types of data sources.  Note that in test cases
+// we need to use 'this' to refer to member variables of the test class.
+template <typename ACCESSOR_TYPE>
+class RRsetCollectionAndUpdaterTest : public DatabaseClientTest<ACCESSOR_TYPE> {
+public:
+    RRsetCollectionAndUpdaterTest() :
+        DatabaseClientTest<ACCESSOR_TYPE>(),
+        updater_(this->client_->getUpdater(this->zname_, false))
+    {}
+
+    ZoneUpdaterPtr updater_;
+};
+
+TYPED_TEST(RRsetCollectionAndUpdaterTest, updateThrows) {
+    // 1. Addition test
+
+    // addRRset() must not throw.
+    this->updater_->addRRset(*this->rrset_);
+
+    // Now setup a new updater and call getRRsetCollection() on it.
+    this->updater_.reset();
+    this->updater_ = this->client_->getUpdater(this->zname_, false);
+    (void) this->updater_->getRRsetCollection();
+
+    // addRRset() must throw isc::InvalidOperation here.
+    EXPECT_THROW(this->updater_->addRRset(*this->rrset_),
+                 isc::InvalidOperation);
+
+    // 2. Deletion test
+
+    // deleteRRset() must not throw.
+    this->updater_.reset();
+    this->updater_ = this->client_->getUpdater(this->zname_, false);
+    this->updater_->addRRset(*this->rrset_);
+    this->updater_->deleteRRset(*this->rrset_);
+
+    // Now setup a new updater and call getRRsetCollection() on it.
+    this->updater_.reset();
+    this->updater_ = this->client_->getUpdater(this->zname_, false);
+    this->updater_->addRRset(*this->rrset_);
+    (void) this->updater_->getRRsetCollection();
+
+    // deleteRRset() must throw isc::InvalidOperation here.
+    EXPECT_THROW(this->updater_->deleteRRset(*this->rrset_),
+                 isc::InvalidOperation);
+}
+
 }

src/lib/datasrc/zone.h

@@ -819,9 +819,9 @@ public:
     /// \c ZoneUpdater implementation.
     ///
     /// The behavior of the RRsetCollection is similar to the behavior
-    /// of the \c Zonefinder returned by \c getFinder() with regards to
+    /// of the \c Zonefinder returned by \c getFinder().
-    /// adding and deleting RRsets via \c addRRset() and \c
+    /// Implementations of \c ZoneUpdater may not allow adding or
-    /// deleteRRset().
+    /// deleting RRsets after \c getRRsetCollection() is called.
     virtual isc::datasrc::RRsetCollectionBase& getRRsetCollection() = 0;
 
     /// Add an RRset to a zone via the updater
@@ -871,6 +871,10 @@ public:
     /// calls after \c commit() the implementation must throw a
     /// \c DataSourceError exception.
     ///
+    /// Implementations of \c ZoneUpdater may not allow adding or
+    /// deleting RRsets after \c getRRsetCollection() is called. In this
+    /// case, implementations throw an \c InvalidOperation exception.
+    ///
     /// If journaling was requested when getting this updater, it will reject
     /// to add the RRset if the squence doesn't look like and IXFR (see
     /// DataSourceClient::getUpdater). In such case isc::BadValue is thrown.
@@ -942,6 +946,10 @@ public:
     /// calls after \c commit() the implementation must throw a
     /// \c DataSourceError exception.
     ///
+    /// Implementations of \c ZoneUpdater may not allow adding or
+    /// deleting RRsets after \c getRRsetCollection() is called. In this
+    /// case, implementations throw an \c InvalidOperation exception.
+    ///
     /// If journaling was requested when getting this updater, it will reject
     /// to add the RRset if the squence doesn't look like and IXFR (see
     /// DataSourceClient::getUpdater). In such case isc::BadValue is thrown.