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README
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The Data Broker (DB) abstraction
The CN-Infra Data Broker abstraction (see the diagram below) is based on two APIs:
- The Broker API - used by app plugins to PULL (i.e. retrieve) data from a data store or PUSH (i.e. write) data into the data store. Data can be retrieved for a specific key or by running a query. Data can be written for a specific key. Multiple writes can be executed in a transaction.
- The Watcher API - used by app plugins to WATCH data on a specified key. Watching means to monitor for data changes and be notified as soon as a change occurs.
The Broker & Watcher APIs abstract common database operations implemented by different databases (ETCD, Redis, Cassandra). Still, there are major differences between keyval-based & sql-based databases. Therefore the Broker & Watcher Go interfaces are defined in each package separately; while the method names for a given operation are the same, the method arguments are different.
Documentation
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Overview ¶
Package db is the parent package for the Data Broker client implementations for various key-value and SQL data stores.
Source Files
Directories
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| Path | Synopsis |
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Package keyval provides an abstraction of a key-value data store and defines the keyval data broker API.
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Package keyval provides an abstraction of a key-value data store and defines the keyval data broker API. |
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etcdv3
Package etcdv3 implements the key-value Data Broker client API for the etcdv3 key-value data store.
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Package etcdv3 implements the key-value Data Broker client API for the etcdv3 key-value data store. |
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etcdv3/mocks
Package mocks implements an embedded etcdv3 mock used in unit & integration tests.
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Package mocks implements an embedded etcdv3 mock used in unit & integration tests. |
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kvproto
Package kvproto provides a wrapper that simplifies the storing and retrieving of proto-modelled data into/from a key-value data store.
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Package kvproto provides a wrapper that simplifies the storing and retrieving of proto-modelled data into/from a key-value data store. |
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plugin
Package plugin contains a keyval plugin skeleton used in various key-value data store clients (e.g.
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Package plugin contains a keyval plugin skeleton used in various key-value data store clients (e.g. |
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redis
Package redis is the implementation of the key-value Data Broker client API for the Redis key-value data store.
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Package redis is the implementation of the key-value Data Broker client API for the Redis key-value data store. |
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Package sql provides an abstraction of a data store that supports an SQL-like query language and defines the SQL data broker API.
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Package sql provides an abstraction of a data store that supports an SQL-like query language and defines the SQL data broker API. |
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cassandra
Package cassandra is the implementation of the SQL Data Broker client API for the Cassandra data store.
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Package cassandra is the implementation of the SQL Data Broker client API for the Cassandra data store. |
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