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IMongoDatabaseExtensions.cs
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IMongoDatabaseExtensions.cs
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/* Copyright 2018-present MongoDB Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System.Threading;
using System.Threading.Tasks;
using MongoDB.Bson;
using MongoDB.Driver.Core.Misc;
using MongoDB.Driver.Linq;
namespace MongoDB.Driver
{
/// <summary>
/// Extension methods on IMongoDatabase.
/// </summary>
public static class IMongoDatabaseExtensions
{
/// <summary>
/// Begins a fluent aggregation interface.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="options">The options.</param>
/// <returns>
/// A fluent aggregate interface.
/// </returns>
public static IAggregateFluent<NoPipelineInput> Aggregate(this IMongoDatabase database, AggregateOptions options = null)
{
var emptyPipeline = new EmptyPipelineDefinition<NoPipelineInput>(NoPipelineInputSerializer.Instance);
return new DatabaseAggregateFluent<NoPipelineInput>(null, database, emptyPipeline, options ?? new AggregateOptions());
}
/// <summary>
/// Begins a fluent aggregation interface.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="session">The session.</param>
/// <param name="options">The options.</param>
/// <returns>
/// A fluent aggregate interface.
/// </returns>
public static IAggregateFluent<NoPipelineInput> Aggregate(this IMongoDatabase database, IClientSessionHandle session, AggregateOptions options = null)
{
Ensure.IsNotNull(session, nameof(session));
var emptyPipeline = new EmptyPipelineDefinition<NoPipelineInput>(NoPipelineInputSerializer.Instance);
return new DatabaseAggregateFluent<NoPipelineInput>(session, database, emptyPipeline, options ?? new AggregateOptions());
}
/// <summary>
/// Creates a queryable source of documents.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="aggregateOptions">The aggregate options</param>
/// <returns>A queryable source of documents.</returns>
public static IMongoQueryable<NoPipelineInput> AsQueryable(this IMongoDatabase database, AggregateOptions aggregateOptions = null)
{
Ensure.IsNotNull(database, nameof(database));
return AsQueryableHelper(database, session: null, aggregateOptions);
}
/// <summary>
/// Creates a queryable source of documents.
/// </summary>
/// <param name="database">The collection.</param>
/// <param name="session">The session.</param>
/// <param name="aggregateOptions">The aggregate options</param>
/// <returns>A queryable source of documents.</returns>
public static IMongoQueryable<NoPipelineInput> AsQueryable(this IMongoDatabase database, IClientSessionHandle session, AggregateOptions aggregateOptions = null)
{
Ensure.IsNotNull(database, nameof(database));
Ensure.IsNotNull(session, nameof(session));
return AsQueryableHelper(database, session, aggregateOptions);
}
/// <summary>
/// Watches changes on all collection in a database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="options">The options.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A change stream.
/// </returns>
public static IChangeStreamCursor<ChangeStreamDocument<BsonDocument>> Watch(
this IMongoDatabase database,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(database, nameof(database));
var emptyPipeline = new EmptyPipelineDefinition<ChangeStreamDocument<BsonDocument>>();
return database.Watch(emptyPipeline, options, cancellationToken);
}
/// <summary>
/// Watches changes on all collection in a database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="session">The session.</param>
/// <param name="options">The options.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A change stream.
/// </returns>
public static IChangeStreamCursor<ChangeStreamDocument<BsonDocument>> Watch(
this IMongoDatabase database,
IClientSessionHandle session,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(database, nameof(database));
Ensure.IsNotNull(session, nameof(session));
var emptyPipeline = new EmptyPipelineDefinition<ChangeStreamDocument<BsonDocument>>();
return database.Watch(session, emptyPipeline, options, cancellationToken);
}
/// <summary>
/// Watches changes on all collection in a database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="options">The options.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A change stream.
/// </returns>
public static Task<IChangeStreamCursor<ChangeStreamDocument<BsonDocument>>> WatchAsync(
this IMongoDatabase database,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(database, nameof(database));
var emptyPipeline = new EmptyPipelineDefinition<ChangeStreamDocument<BsonDocument>>();
return database.WatchAsync(emptyPipeline, options, cancellationToken);
}
/// <summary>
/// Watches changes on all collection in a database.
/// </summary>
/// <param name="database">The database.</param>
/// <param name="session">The session.</param>
/// <param name="options">The options.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A change stream.
/// </returns>
public static Task<IChangeStreamCursor<ChangeStreamDocument<BsonDocument>>> WatchAsync(
this IMongoDatabase database,
IClientSessionHandle session,
ChangeStreamOptions options = null,
CancellationToken cancellationToken = default(CancellationToken))
{
Ensure.IsNotNull(database, nameof(database));
Ensure.IsNotNull(session, nameof(session));
var emptyPipeline = new EmptyPipelineDefinition<ChangeStreamDocument<BsonDocument>>();
return database.WatchAsync(session, emptyPipeline, options, cancellationToken);
}
// private static methods
private static IMongoQueryable<NoPipelineInput> AsQueryableHelper(IMongoDatabase database, IClientSessionHandle session, AggregateOptions aggregateOptions)
{
var linqProvider = database.Client.Settings.LinqProvider;
aggregateOptions = aggregateOptions ?? new AggregateOptions();
return linqProvider.GetAdapter().AsQueryable(database, session, aggregateOptions);
}
}
}