Hello Quan, On 19/07/2021 17:59, Quan tran hong wrote: > Hi, > I am starting to implement ThreadIdGuessingAlgorithm for the distributed > module. Because this is a breaking change and I am new to Cassandra also, > therefore I want to have some discussion with you about how to do this. As long as we introduce a new table there is no reason that it creates breaking change, but getting the format right will ease our life down the line. > > For the ones who did not catch up with this work, please have a look at > JMAP Threads specs [1] and my work related to this [2]. > > So my ideas on how to do this: > - Add a needed inputs Cassandra Table for guessing threadId algorithm. > Maybe a table likes: > CREATE TABLE ThreadRelatedTable ( > threadId timeuuid, > messageId timeuuid, > mimeMessageIds SET<text>, > subject text, > PRIMARY KEY (mimeMessageIds, subject) > ); > - Whenever we guess threadId for a new message, we access this table and do > the matching query to get related threadId(if there is) or decide new > message should have a new threadId. > - Whenever we save a new message, we save the thread-related data to this > table. > > This is my first come-up idea. Please express your thoughts about this. Collections are an advanced data modeling tool, that should be used with caution. I am not sure using it in a PRIMARY KEY is a good idea. I am not sure that does what you want (the full primary key should be specified to know which node hold the data.
Also, once you found the message related to a thread you want to validate that the subject matches. This can be done on application side (James), and avoids complicated data model. I encourage you to validate your data model using a Cassandra in docker and executing CQL commands locally with CQLSH tool to simulate the queries you whish to do, and learn about your data model before even starting to implement it. IMO sharing CQL commands for creating the table, inserting data in it, and retrieving data from it would be a great follow up to this email. How would you populate the data of that table? Best regards, Benoit > > Best regards, > > Quan > > [1] https://jmap.io/spec-mail.html#threads > [2] https://issues.apache.org/jira/browse/JAMES-3516 > --------------------------------------------------------------------- To unsubscribe, e-mail: server-dev-unsubscr...@james.apache.org For additional commands, e-mail: server-dev-h...@james.apache.org
