/// <summary>
/// Initialises a new instance of the <see cref="AttachmentTypeMapping{TDocument,TAttachment}" /> class.
/// </summary>
/// <param name="attachmentName">The attachment name.</param>
/// <param name="documentMapping">The document mapping.</param>
/// <param name="reader">The attachment reader.</param>
/// <param name="writer">The attachment writer.</param>
internal AttachmentTypeMapping(
string attachmentName,
DocumentTypeMapping <TDocument> documentMapping,
Func <Stream, TAttachment> reader,
Func <TAttachment, Stream> writer)
{
if (attachmentName == null)
{
throw new ArgumentNullException(nameof(attachmentName));
}
if (documentMapping == null)
{
throw new ArgumentNullException(nameof(documentMapping));
}
if (reader == null)
{
throw new ArgumentNullException(nameof(reader));
}
if (writer == null)
{
throw new ArgumentNullException(nameof(writer));
}
AttachmentName = attachmentName;
DocumentMapping = documentMapping;
Reader = reader;
Writer = writer;
}
public IQueryable <TDbDocument> CreateQuery <TDocument>(
DocumentTypeMapping <TDocument> mapping,
string query,
IEnumerable <DbParameter> parameters = null)
{
FeedOptions queryOptions = new FeedOptions
{
MaxItemCount = -1,
EnableCrossPartitionQuery = true
};
var contentKey = CreateContentKey(mapping);
string selectStatement = $"SELECT * FROM {DbAccess.DbConfig.CollectionName} as c WHERE is_defined(c.{contentKey})";
if (query != null)
{
// Perform substitution on references to the internal document. '[x].' is replaced while excluding
// occurrences in a string.
string substitutedClause = Regex.Replace(query, "\\[x\\]\\.(?=[^']*(?:'[^']*'[^']*)*$)", $"c.{contentKey}.");
selectStatement = $"{selectStatement} AND ({substitutedClause})";
}
if (!DbAccess.QueryPolicy.IsQueryValid(selectStatement))
{
throw new NebulaStoreException("Failed to create document query");
}
var querySpec = CreateQuerySpec(selectStatement, parameters);
return(MakeClientCall(
() => DbAccess.DbClient.CreateDocumentQuery <TDbDocument>(CollectionUri, querySpec, queryOptions),
"Failed to create document query"));
}
protected bool TryGetDocumentContent <TDocument>(
DbDocument document,
DocumentTypeMapping <TDocument> mapping,
out TDocument result,
out DocumentReadFailureDetails failure)
{
try
{
result = document.GetPropertyValue <TDocument>(CreateContentKey(mapping));
}
catch (JsonSerializationException e)
{
result = default(TDocument);
failure = new DocumentReadFailureDetails("Failed to deserialise document", e.Message);
return(false);
}
if (result == null)
{
failure = new DocumentReadFailureDetails("Failed to deserialise document", "Missing document content body");
return(false);
}
failure = null;
return(true);
}
/// <summary>
/// Initialises a new instance of the <see cref="AttachmentTypeMappingBuilder{TDocument,TAttachment}"/> class.
/// </summary>
/// <param name="attachmentName">The attachment name.</param>
/// <param name="documentMapping">The document type mapping.</param>
internal AttachmentTypeMappingBuilder(string attachmentName, DocumentTypeMapping <TDocument> documentMapping)
{
if (attachmentName == null)
{
throw new ArgumentNullException(nameof(attachmentName));
}
if (documentMapping == null)
{
throw new ArgumentNullException(nameof(documentMapping));
}
_attachmentName = attachmentName;
_documentMapping = documentMapping;
}
protected string CreateDbRecordId <TDocument>(DocumentTypeMapping <TDocument> mapping, params string[] values)
{
if (values.Length == 0)
{
throw new ArgumentException("At least one value required", nameof(values));
}
// The db record id must be globally unique. That is ensured by generating a GUID here that is based off
// a string that includes the service name, store name and document name as well as the document id and
// version. Having the id generated deterministically like this allows us to ensure that multiple clients
// for the same store, fails when racing on updating a particular document (with the same id).
var prefix = CreateContentKey(mapping);
return(GuidUtility.Create(GuidUtility.UrlNamespace, prefix + "_" + string.Join("_", values)).ToString());
}
protected void SetDocumentContentFromExisting <TDocument>(
DbDocument dbDocument,
DbDocument existingDocument,
DocumentTypeMapping <TDocument> mapping)
{
var contentKey = CreateContentKey(mapping);
var contentValue = existingDocument.GetPropertyValue <object>(contentKey);
try
{
dbDocument.SetPropertyValue(contentKey, contentValue);
}
catch (JsonException e)
{
throw new NebulaStoreException("Failed to serialise document content", e);
}
}
protected string CreateContentKey <TDocument>(DocumentTypeMapping <TDocument> mapping)
{
return(_dbAccess.ConfigManager.CreateDocumentContentKey(_config.StoreName, mapping.DocumentName));
}
protected void SetDocumentContent <TDocument>(DbDocument dbDocument, TDocument content, DocumentTypeMapping <TDocument> mapping)
{
try
{
dbDocument.SetPropertyValue(CreateContentKey(mapping), content);
}
catch (JsonException e)
{
throw new NebulaStoreException("Failed to serialise document content", e);
}
}
