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5.X Change Log

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grant lodge edited this page Apr 11, 2023 · 39 revisions

5.7.0

🔬 Experimental/Preview changes

  • the Neo4j.Driver.Experimental namespace has been renamed to Neo4j.Driver.Preview. This will be a compile-time breaking change for any code using this namespace. No functionality has been changed.

⭐ New Features

  • Introduce IDriver.TryVerifyConnectivityAsync #693 #See issue
  • Notifications Updates #691 Introduce better notifications, and configuration(Docs).

NotificationSeverity

Introduce NotificationSeverity enum represents to represent a notification's severity level.

Severities:

  • Warning
  • Information
  • Unknown

5.7 API Doc

NotificationCategory

Introduce NotificationCategory enum represents to represent a notification's category.

Categories:

  • Hint
  • Unrecognized
  • Unsupported
  • Performance
  • Deprecation
  • Generic
  • Unknown

5.7 API Doc

Notification

The INotification interface extended with 4 new properties:

  • NotificationSeverity SeverityLevel
  • string RawSeverityLevel
  • NotificationCategory Category
  • string RawCategory

The Raw prefixed properties return an unparsed string representation returned by the server. In case of an unrecognised values, both SeverityLevel and Category will be Unknown. This may happen if a new value is introduced in a future server version and a previous driver version does not support it. Additionally, Unknown may be returned when driver communicates with a server version that does not supply these values.

Deprecation ⚠️

The Severity property has been deprecated in favour of the RawSeverityLevel property.

5.7 API Doc

NotificationConfig

Introduce INotificationConfig type has been introduced to allow notification preferences management. By default, the server determines what notifications are provided to the driver. However, user can set a minimum severity level and/or a set of disabled notification categories to manage its expectations. This feature is only supported on Bolt protocol version 5.2(Introduced in server 5.7) and above.

Both the Config and the SessionConfig support this new configuration, configured with builders:

Introduce Severity(API Docs) & Category(API Docs) enums for configuration.

Notification Configuration Hierarchy

Servers will assess which notifications to emit based on a hierarchy, using the most recently declared values.

using var driver = GraphDatabase.Driver("neo4j+s//auradb", AuthToken, cb => cb.WithNotificationsDisabled());
using var session = driver.AsyncSession();
...
var summary = await cursor.ConsumeAsync();
// No notifications should be emitted.
// This is useful for helping the server optimize operations as the server doesn't need to assess for any notifications.
// Notifications are not sent over the wire too meaning less data! 
Debug.Assert(summary.Notifications.Count() == 0);

Severity configuration sets the minimum level of a notification, while category confugration is used to disable a category.

using var driver = GraphDatabase.Driver("neo4j+s//auradb", AuthToken, cb => cb.WithNotifications(Severity.Warning, null));
using var session = driver.AsyncSession(scb => scb.WithNotifications(null, new []{Category.Performance}));
...
var summary = await cursor.ConsumeAsync();
// no Information or performance notifications emitted.
Debug.Assert(summary.Notifications.Count(x => 
        x.NotificationCategory == NotificationCategory.Performance ||
        x.NotificationSeverity == NotificationSeverity.Information) == 0);

if you require to enable a previously disabled categories for a session you can emit it from disabledCategories parameter.

using var driver = GraphDatabase.Driver("neo4j+s//auradb", AuthToken, cb => cb.WithNotifications(null, new []{Category.Performance}));
using var session = driver.AsyncSession(scb => scb.WithNotifications(null, new Category[]{}));
...
var summary = await cursor.ConsumeAsync();
// Notifications can contain anything again!

Bolt

This update includes support for both 5.1 and 5.2 versions. The latter is required for the full support of the new notification updates.

5.6.0

No changes.

5.5.0

🔧 Fixes

  • The IsRetriable property on exceptions is now public

🔬 Experimental changes

  • The ExecutableQuery API has been added to the Experimental namespace (see here for more information)

5.4.0

🔧 Fixes

  • Add documentation for SessionConfigBuilder.WithDatabase and SessionConfig.Database
  • Exclude test code in snyk code analysis
  • TestKit backend: exclude txMeta from Cypher types
  • Add new exception types and change to explicitly identifying fast fail errors

5.3.0

🔬 Experimental bookmark manager changes:

  • Remove database notions from bookmark manager.
  • Fix Bookmark manager references outside of Neo4j.Driver.Experimental namespace.
  • When replacing LastBookmark with LastBookmarks we accidentally removed the old property, not following the planned deprecation policy. It is now restored and marked as obsolete, and due for removal in 6.0 of the driver.
  • Simplify creation of bookmark manager with default config.

5.2.0

🔬 Experimental change

  • Fixed an issue bookmark manager experimental classes: correctly exposing WithBookmarkManager to use bookmark managers on session configuration(#654).

5.1.0

No changes.

5.0.0

No changes.

5.0.0 (Beta02)

final tidying for major release.

Nuget

⭐ New Features

  • Introduce Experimental Bookmark Manager. (Not recommended for production use currently.) (#632)
    • Using Neo4j.Driver.Experimental.GraphDatabase.BookmarkManagerFactory users can create an IBookmarkManager.
    • IBookmarkManager can be passed to SessionConfigBuilder when creating a creating a session by using the Neo4j.Driver.Experimental.ExperimentalExtensions to add WithBookmarkManager to SessionConfigBuilder.
    • The Experimental methods will be finalized as:
      • Neo4j.Driver.Experimental.GraphDatabase.BookmarkManagerFactory -> Neo4j.Driver.GraphDatabase.BookmarkManagerFactory
      • Neo4j.Driver.Experimental.ExperimentalExtensions -> Neo4j.Driver.SessionConfigBuilder.

🔧 Fixes

  • Transaction lifetimes. (#640)
    • ⚠️ remaining managed transactions have been deprecated and replaced, removing the ability to commit or rollback transactions inside the unit of work scope.
      • ISession.ReadTransaction -> ISession.ExecuteRead
      • ISession.WriteTransaction -> ISession.ExecuteWrite
      • IRxSession.ReadTransaction -> IRxSession.ExecuteRead
      • IRxSession.WriteTransaction -> IRxSession.ExecuteWrite

🧹 Clean-up

  • Removal of 4.X Deprecations
    • Removal of IServerInfo.Version (#638)

5.0.0 (Beta01)

This release introduces full support for Neo4j 5.0 Servers.

Nuget

👏 .NET 6 Support

We now release for .NET 6.0 and .NET Standard 2.0.

⭐ New Features

  • Support for Bolt protocol version 5.0
    • ⚠️ Deprecate all IEntity integer ids replacing them with string ids:
      • IEntity.Id -> IEntity.ElementId
      • INode.Id -> INode.ElementId
      • IRelationship.Id -> IRelationship.ElementId
      • IRelationship.EndNodeId -> IRelationship.EndNodeElementId
      • IRelationship.StartNodeId -> IRelationship.StartNodeElementId
        (#573 #591 #600 #618)
    • Utc Encoding of ZonedDateTime (#630 #637)
  • SSL Configuration(#585)
    • SSL certificate trust rules can be set on driver initialization using ConfigBuilder.WithCertificateTrustRule
      • CertificateTrustRule.TrustSystem
        • Will verify certificates against the system's Certificate Authority store.
      • CertificateTrustRule.TrustList
        • Users can specify a collection of X509Certificate2 or paths to load as trusted certificates.
      • CertificateTrustRule.TrustAny
        • Will trust any SSL Cert.
    • ⚠️ Users can not use both ConfigBuilder.WithCertificateTrustRule and +s/+ssc in the url scheme at the same time.
  • Added Driver.GetServerInfoAsync. (#605)
    • Will verify connectivity and return a IServerInfo detailing server summary.
  • Added CanBeRetried to Exception. (#613)
    • All errors from driver that can be resolved by retrying an operation will return true.
  • Add IsOpen to Result cursors. (#610)
    • IsOpen will return if the underlying cursor is open to read records; Attempting to read from a closed cursor will throw a ResultConsumedException.
  • Connection Acquisition Timeout (#588)
    • ConfigBuilder.WithConnectionAcquisitionTimeout allows users to set maximum wait time to get a connection from the pool or create a new connection on driver initialization.
    • ⚠️ default: 60 seconds

🔧 Fixes

  • Transaction lifetimes. (#612)
    • ⚠️ Async managed transactions have been deprecated and replaced, removing the ability to commit or rollback transactions inside the unit of work scope.
      • IAsyncSession.ReadTransactionAsync -> IAsyncSession.ExecuteReadAsync
      • IAsyncSession.WriteTransactionAsync -> IAsyncSession.ExecuteWriteAsync
    • Attempting close a transaction after it has been closed will now throw a TransactionClosedException.
  • Rename Bookmark to Bookmarks. (#609)
    • ⚠️ Due to a mix of language Bookmark and all references to bookmarks have been pluralized as it allows for multiple values.
    • Bookmark -> Bookmarks
    • Session.LastBookmark -> Session.LastBookmarks
    • SessionConfigBuilder.WithBookmarks(Bookmark[]) -> SessionConfigBuilder.WithBookmarks(Bookmarks[])
  • Transaction timeout (#574)
    • TransactionConfigBuilder.WithTimeout now accepts Nullable<TimeSpan> for timeout.
      • ⚠️ null will use the server's default transaction timeout.
      • ⚠️ TimeSpan.Zero will remove timeout from transaction.
  • No longer throwing when using APOC procedures in a profiled query. (#633)
  • Discovery exceptions. (#594)
  • Error message handling. (#592)

Full Changelog: https://github.com/neo4j/neo4j-dotnet-driver/compare/4.4.0...5.0.0-beta01

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