New features and bug fixes:
- MongoDB 3.4 Support
- New URI and read preference option, "maxStalenessSeconds"
- Set MongoDB client handshake data with mongoc_client_set_appname or
mongoc_client_pool_set_appname.
- writeConcern and readConcern enhancements.
- Collation allows users to specify language-specific rules for string
comparison when sorting documents.
- mongoc_collection_count_with_opts uses the collection's read
preference if none is passed in
- Improved TLS support
- Fixed LibreSSL (libssl) support
- Added LibreSSL (libtls) support
- Fixed Secure Channel build on VS 2010
- OpenSSL now supports SNI (all others already do)
- Additional features for Application Performance Monitoring
- New functions accept flexible options as a BSON document.
- mongoc_collection_find is now deprecated in favor of
mongoc_collection_find_with_opts.
- New helper function to include read concern in one of the above
function's options parameter: mongoc_read_concern_append.
- mongoc_client_command no longer applies the client's read preference
and read concern by default. Same change for mongoc_database_command
and mongoc_collection_command.
- mongoc_collection_count_with_opts now applies the collection's read
preference if no read preference is provided
- mongoc_collection_create_index and mongoc_collection_drop_index now
apply the collection's write concern.
- mongoc_collection_create_index_with_opts now applies the collection's
write concern if none is specified in "opts"
- connectTimeoutMS timer now begins after DNS resolution, and resets for
each interface attempted (e.g., if the driver first tries IPv6, then
IPv4).
- New error code MONGOC_ERROR_DUPLICATE_KEY.
- mongoc_collection_find no longer treats the "filter" key specially in
queries - querying for a document with a key named "filter" is the
same now as any other key.
- The server description parameter to the following functions is
"const":
- mongoc_server_description_host
- mongoc_server_description_id
- mongoc_server_description_ismaster
- mongoc_server_description_round_trip_time
- mongoc_server_description_type
- Exported symbols are no longer declared in seperate export files.
- mongoc no longer crashes when multi roundtrip bulk operation fails.
- Added support for the new readConcernLevel "linearizable".
- Clients now check for misformatted "readPreferenceTags" in URI.
- New CMake option ENABLE_TRACING allows debug output, which before had
only been available with "configure --enable-tracing".
- Bugfix: "PossiblePrimary"-type replicas could be selected for reads
- Bugfixes: The random number generator used to select servers is now
properly seeded, and secondary queries are now properly distributed
according to localThresholdMS, not just to the lowest-latency secondary.
The latency estimate is reset after a connection error.
- Fix crashes in mongoc_topology_invalidate_server and
mongoc_client_kill_cursor.
- mongoc_collection_insert, mongoc_collection_update,
mongoc_collection_remove consistently use domain MONGOC_ERROR_BSON,
code MONGOC_ERROR_BSON_INVALID if passed oversized BSON, and
MONGOC_ERROR_COLLECTION for other errors. mongoc_bulk_operation_execute
continues to use MONGOC_ERROR_COMMAND for all errors.
- If mongoc_client_pool_t fails to start its scanner thread in the
background, it logs and aborts instead of silently continuing, then
failing to connect.
- The driver now updates its view of the whole topology with information
from each new connection handshake.
- Improved error reporting when the driver fails to reach the server,
and correctly distinguish "connection error" and "connection timeout".
Deprecations:
- mongoc_collection_find is deprecated for
mongoc_collection_find_with_opts.
Removed configure flags:
- --enable-experimental has been removed. All previously experimental
features are now always on.
- The configure option "--enable-hardening" had had no effect. It is
removed in favor of system-wide compiler configuration.
51ddde52f1