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Flows that are kept for overnight observation:
- Save their Checkpoint.status as 'HOSPITALIZED' in the database
- Save the error that caused the hospitalization in the database
A new Event was added for this reason. Whenever the hospital determines
a flow for hospitalization, it adds this Event in the flow's fiber queue.
When processed it creates a new DB transaction, stores the checkpoint status along with
the error, and it adds a 'FlowContinuation.ProcessEvents' continuation so that the fiber keeps
processing events (effectively since there are no more events in the fiber's channel, the fiber will suspend).
Flows that error:
- Their checkpoints are kept in the database
- Save their Checkpoint.status as 'FAILED'
- Save the error that caused the error in the database
Upon erroring, the flow's Checkpoint.status gets updated('FAILED') and the checkpoint is stored
in the database instead of getting removed. The flow then propagates the error to counterparties,
sets its future with the error and gets removed from memory.
Corda
Corda is an open source blockchain project, designed for business from the start. Only Corda allows you to build interoperable blockchain networks that transact in strict privacy. Corda's smart contract technology allows businesses to transact directly, with value.
Features
- Smart contracts that can be written in Java and other JVM languages
- Flow framework to manage communication and negotiation between participants
- Peer-to-peer network of nodes
- "Notary" infrastructure to validate uniqueness and sequencing of transactions without global broadcast
- Enables the development and deployment of distributed apps called CorDapps
- Written in Kotlin, targeting the JVM
Getting started
- Read the Getting Started documentation
- Run the Example CorDapp
- Read about Corda's Key Concepts
- Follow the Hello, World! tutorial
Useful links
- Project Website
- Mailing List
- Documentation
- Stack Overflow Tag
- Slack Channel
- Meetups
- Training Courses
Contributing
Corda is an open-source project and contributions are welcome!
To find out how to contribute, please see our contributing docs.
License
Acknowledgements
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