8.1.0

Fixed

• Sending envelopes now properly jumps to next node in query plan, if current one is unreachable.
• Fixed stack overflow when cannot determine field type during struct serialization.
• Properly supporting references during struct serialization.

New

• Many types are now Debug.
• HTTP proxy support via the http-proxy feature.
• InvalidProtocol special error for a case when a node doesn't accept requested protocol during handshake.
• ConnectionPoolConfigBuilder for building configuration easily.
• Configurable heartbeat messages to keep connection alive in the pool.

Changed

• Made protocol enums non-exhaustive for future compatibility.
• Session builders are now async and wait for control connection to be ready before returning a session.
• CBytes::new_empty() -> CBytes::new_null(), CBytes::is_empty() -> CBytes::is_null_or_empty().
• Removed Ord, ParialOrd from QueryFlags.
• Using rustls types exported from tokio-rustls, rather than depending on rustls directly.
• Due to an edge case with reconnecting to a seemingly downed node, internal reconnection handling mechanism has been improved.
• Hidden internal structures, which were public but not usable in any way.

7.0.4

Fixed

• Fixed serialization of routing key with known indexes.

7.0.3

Fixed

• Fixed serialization of routing key with known indexes.

Changed

• Deprecated query_with_param() in Pager, in favor of query_with_params().

7.0.1

Fixed

• Overflow when compressed envelope payload exceeds max payload size.
• Integer overflow when not received at least 8 header bytes.

7.0.0

New

• Clone implemented for BodyResReady and BodyReqExecute.

Changed

• Control connection errors are now logged as warnings, since they're recoverable.
• Exposed fields of BodyReqAuthResponse and BodyReqExecute.
• Replaced CInet type with SocketAddr, since it was nothing more than a wrapper.

7.0.0-beta.1

Fixed

• ExponentialReconnectionSchedule duration overflow.
• Forgetting real error type in certain transport error situations.
• Not sending re-preparation statements to correct nodes.
• Infinite set keyspace notification loop.

New

• Protocol V5 support. Please look at official changelog for more information: https://github.com/apache/cassandra/blob/trunk/doc/native_protocol_v5.spec#L1419.
• Support for beta protocols - possibility to connect to beta clusters.
• From<Decimal> for BigInt.
• check_envelope_size for Evelope.
• Error is now Clone.
• FrameEncoder, FrameDecoder and FrameEncodingFactory responsible for encoding/decoding frames on the wire.
• with_frame_encoder_factory Session build option.
• Error impl for CheckEnvelopeSizeError and ParseEnvelopeError.
• New Error variants for more granular error handling.
• Node address in Error::Server variant.

Changed

• Due to naming changes in V5, frame have been renamed to message, Frame to Envelope and a frame now
  corresponds to wrapped envelopes, as defined by the protocol.
• Serialize and FromCursor traits now pass protocol version to implementations.
• Row::from_frame_body renamed to from_body.
• ClusterMetadataManager::find_node renamed to find_node_by_rpc_address for consistency.
• QueryFlags got extended for V5 and now supports Serialize and FromCursor.
• Session builders now validate given configuration and return a Result.
• Transport startup now fails gracefully on unexpected server response.
• CdrsTransport now requires explicit information if messages are a part of initial handshake.
• ResResultBody::as_rows_metadata and ResponseBody::as_rows_metadata now return a reference to the data.
• Hash, PartialEq and PartialOrd for PreparedQuery only take id and result_metadata_id into account,
  since those define equivalence.
• Updated chrono dependency to work around found CVE.

6.2.0

New

• derive feature built into the main crate - no need to explicitly use cdrs_tokio_helpers_derive::* anymore.

6.1.0

New

• #[must_use] on some functions.

Fixed

• Fixed parsing NetworkTopologyStrategy.

6.0.0

This version is a departure from legacy API design, stemming from the sync version migration. Due to large
performance issues and lack of dynamic topology handling in earlier versions, a decision has been made to cut
the ties and focus on delivering the best functionality without legacy burden. The API surface changes are
quite large, but everyone is encouraged to update - the performance improvements and new features cannot be
understated.

New

• Topology-aware load balancing: TopologyAwareNodeDistanceEvaluator and TopologyAwareLoadBalancingStrategy.
• New ReconnectionPolicy used when trying to re-establish connections to downed nodes.
• Error now implements standard Error.
• SessionBuilder introduced as the preferred way to create a session.
• Added missing traits for BatchType and QueryFlags.
• ToString implementation for SimpleServerEvent.
• Standard trait implementations for event frames.
• contains_column, is_empty_by_name and is_empty functions for Row.
• Display implementation for public enums.
• Missing traits for PreparedMetadata, Value, Consistency and ColType.
• New PreparedMetadataFlags.
• New ClusterMetadata representing information about a cluster.
• Extracted protocol functionality to separate cassandra-protocol crate.
• Passing final auth data from the server to SaslAuthenticator.
• SpeculativeExecutionPolicy for speculative execution control.

Changed

• All with_name fields or args in the query API are now bool instead of Option<bool>
• flags field removed from QueryParams (flags are now derived from the other fields at serialization time)
• Rewritten transport layer for massive performance improvements (including removing bb8). This
  involves changing a large portion of public API related to transport and server events.
• Rewritten event mechanism - now you can subscribe to server events via create_event_receiver() in Session.
• Replaced RowsMetadataFlag, QueryFlags and frame::Flags vectors with bitflags.
• Changed Target and ChangeType enums to SchemaChangeTarget and SchemaChangeType.
• The varint type now uses num::BigInt representation (this implies Decimal also uses "big" types).
• Removed unstable-dynamic-cluster feature, since it wasn't working as expected and introduced performance
  penalty. Dynamic topology handling is now built-in.
• Removed AsBytes in favor of new Serialize trait due to performance penalty.
• Removed FromSingleByte and AsByte in favor of From/TryFrom.
• Removed traits along with async-trait dependency: BatchExecutor, ExecExecutor, PrepareExecutor,
  QueryExecutor, GetConnection and CdrsSession. Everything is now embedded directly in Session.
• Load balancing strategy now returns query plans, rather than individual nodes, and operates on cluster metadata.
• Removed SingleNode load balancing strategy.
• Removed empty SimpleError.
• Renamed connect_generic_static to connect_generic.
• Removed GetRetryPolicy.
• Renamed ChangeSchemeOptions to SchemaChangeOptions.
• Protocol version can now be selected at run time.
• Value now directly contains the value in the Some variant instead of a separate body field.
• Consistent naming convention in all builders.
• Split protocol-level parameters from high-level statement parameters (QueryParams vs StatementParams) and
  simplified API.
• add_query_prepared for batch queries now takes PreparedQuery by reference.

5.0.0

New

• Support for stateful SASL authenticators.

Changed

• Using up-to-date lz4 crate (no more unmaintained dependency alerts).