andresbeckruiz opened a new pull request, #339:
URL: https://github.com/apache/cassandra-sidecar/pull/339
## CASSSIDECAR-373
Implements `CassandraStorageProvider`, the default Cassandra backed
implementation of the `StorageProvider` interface for durable operational job
state.
## Changes
- `StorageProvider` interface, which adds a provider-agnostic abstraction
for persisting, querying, and coordinating operational jobs
- `OperationalJobRecord` is the data transfer object representing
persisted job state
- `OperationalJobConfiguration` provides configurable table TTL, and in
the future can support remote Cassandra cluster connection
- Three Cassandra table schemas:
- `cluster_ops` — persists and tracks operational jobs (restarts,
upgrades, etc.)
- `cluster_ops_node_state` — tracks per-node status within an operation
- `active_cluster_ops` — provides mutual exclusion of concurrent
operations via LWT
- Database accessors: (`ClusterOpsDatabaseAccessor`,
`ClusterOpsNodeStateDatabaseAccessor`, `ActiveClusterOpsDatabaseAccessor`)
- `CassandraStorageProvider` composes the three accessors, acts as thin
delegation layer
- Unit tests (integration testing will be unlocked with [CASSSIDECAR-375])
## Future Work
- Remote Cassandra cluster storage support
- Future
[CEP-53](https://cwiki.apache.org/confluence/display/CASSANDRA/CEP-53%3A+Cassandra+Rolling+Restarts+via+Sidecar)
work:
- CASSSIDECAR-374: Implement durable operational job tracker
- CASSSIDECAR-375: Add storage provider to enable JVM Distributed
tests for cluster-wide operational jobs
- CASSSIDECAR-377: Implement job coordination for cluster-wide
operations
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