yukon created COMDEV-251:
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Summary: [RocketMQ] Support Distributed Transactional Messaging
Key: COMDEV-251
URL: https://issues.apache.org/jira/browse/COMDEV-251
Project: Community Development
Issue Type: Improvement
Components: GSoC/Mentoring ideas
Reporter: yukon
In most businesses, transactional messaging is frequently used to make a series
of operations as an atomic transaction.
At present, RocketMQ doesn't support transactional messaging, there is a
potential need for a database implementation to solve the implement transaction
mechanism. But a database system heavyweight and can't meet the
high-performance demand.
In messaging domain, there is a simpler and more efficient distributed
transaction solution than 2PC/XA/3PC protocols:
Implement a TransactionProducer and LocalTransactionChecker, guarantee message
delivery and local transaction operations are atomic.
The following is the simple transactional messaging flow:
1. TransactionProducer sends a half message to the broker. A half message means
it's not confirmed and can't be delivered to the consumer.
2. TransactionProducer executes the specific local transaction.
3. Commit or Rollback the half message according to the status of the local
transaction. A half message will be deleted if it's rollbacked and delivered to
the consumer if it's committed.
The above solution is for reference only, a better solution is welcome.
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