/// <summary>
/// Configures the specified context.
/// </summary>
/// <param name="context">The context.</param>
public void Configure(MongoEntityBuilder <BreakfastItem> context)
{
context.Indexes.Add("name_unique",
Builders <BreakfastItem> .IndexKeys.Ascending(x => x.Name),
o => o.Unique().WithCaseInsensitiveCollation());
context.Seed.Add(Seed);
}
/// <summary>
/// Gets the MongoDB collection for the specified type.
/// </summary>
/// <typeparam name="TEntity">The type of the entity.</typeparam>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns></returns>
public async Task <IMongoCollection <TEntity> > GetCollectionAsync <TEntity>(CancellationToken cancellationToken = default)
where TEntity : MongoEntity
{
if (_disposed)
{
throw new ObjectDisposedException(nameof(MongoContext));
}
var collectionName = _options.Value.GetCollectionName <TEntity>();
var collection = _database.GetCollection <TEntity>(collectionName);
if (_bootstrappedCollections.Contains(typeof(TEntity)))
{
return(collection);
}
try
{
await _semaphore.WaitAsync(cancellationToken);
if (_bootstrappedCollections.Contains(typeof(TEntity)))
{
return(collection);
}
var configurations = _serviceProvider.GetServices <IMongoEntityConfiguration <TEntity> >();
var builder = new MongoEntityBuilder <TEntity>();
foreach (var configuration in configurations)
{
configuration.Configure(builder);
}
// Indexes.
var indexTasks = builder.Indexes.Select(index =>
collection.Indexes.CreateOneAsync(index, null, cancellationToken));
await Task.WhenAll(indexTasks);
// Seeds.
var seedTasks = builder.Seed.Select(async seed =>
{
var cursor = await collection.FindAsync(
Builders <TEntity> .Filter.IdEq(seed.Id),
cancellationToken: cancellationToken);
if (await cursor.AnyAsync(cancellationToken))
{
return;
}
await collection.InsertOneAsync(seed, cancellationToken: cancellationToken);
});
await Task.WhenAll(seedTasks);
_bootstrappedCollections.Add(typeof(TEntity));
return(collection);
}
finally
{
_semaphore.Release();
}
}