public async Task <bool> PutMessageIfNotDuplicateAsync(ChatMessageRow row)
{
var putReq = new PutItemRequest()
{
TableName = this.tableName,
Item = ToAttributeValueMap(row),
ConditionExpression = "attribute_not_exists(messageId)",
};
try
{
await this.ddb.PutItemAsync(putReq);
}
catch (ConditionalCheckFailedException cex)
{
return(false);
}
return(true);
}
public async Task UpdateChatMessageAsync(ChatMessageRow row) => await this.context.SaveAsync(row, this.config);
private Dictionary <string, AttributeValue> ToAttributeValueMap(ChatMessageRow row) => this.context.ToDocument(row).ToAttributeMap();
