public async Task <bool> CreateCollectionIfNotExistsAsync(string cosmosDatabase, string cosmosColection, int docDBRUs, CosmosOperation operation)
{
bool status = false;
try
{
this.requestOptions = this.GetDocDbOptions(docDBRUs);
var uri = $"/dbs/{cosmosDatabase}/colls/{cosmosColection}";
await this.client.ReadDocumentCollectionAsync(uri, this.requestOptions);
status = true;
}
catch (DocumentClientException)
{
await this.CreateCollectionAsync(cosmosDatabase, cosmosColection, docDBRUs, operation.ToString());
status = true;
}
return(status);
}
private async Task CreateCollectionAsync(string cosmosDatabase, string cosmosCollection, int docDBRUs, CosmosOperation operation)
{
try
{
var collection = new DocumentCollection {
Id = cosmosCollection
};
var index = Microsoft.Azure.Documents.Index.Range(DataType.String, -1);
var indexing = new IndexingPolicy(index)
{
IndexingMode = IndexingMode.Consistent
};
collection.IndexingPolicy = indexing;
if (operation == CosmosOperation.Device)
{
collection.PartitionKey.Paths.Add("/deviceId");
}
var dbUri = "/dbs/" + cosmosDatabase;
this.requestOptions = this.GetDocDbOptions(docDBRUs);
await this.client.CreateDocumentCollectionAsync(dbUri, collection, this.requestOptions);
}
catch (DocumentClientException)
{
// If the collection is already created it will throw a DocumentClientException and we do not want to handle that
// So we do not throw this exception
}
catch (Exception e)
{
throw new ApplicationException("Error while creating DocumentDb collection", e);
}
}