Redis Bridge Component

The Redis Bridge component extends the Bus across multiple nodes.

Data published to subscribed topics on a node's Bus can be exported to a Redis server. The same component can be used to import from Redis topics to a Bus. Thus Bus data in one Xrt instance may be reflected in the Bus of another instance, or data may be exchanged with other Redis-based applications.

Redis Bridge Configuration

The following tables describe the configuration variables to use with the Redis bridge component:

• Redis Bridge Configuration Variables
• Redis Configuration Variables

Redis Bridge Configuration Variables

Parameter	Type	Description	Valid Values	Required Y/N
Bus	String	The name of the Bus component to use	The name of an existing Bus component	Y
Logger	String	The name of the Logger component to use	The name of an existing Logger component	N
QueueSize	Unsigned Integer	The size of the queue for the bus subscriber to hold messages	Default: 4	N
Cookie	Integer	The cookie value for the subscriber	A valid cookie	N
RetryCount	Unsigned Integer	Maximum number of times to retry reconnection	Default: 5	N
RetryInterval	Unsigned Integer	Interval in seconds to attempt reconnection	Default: 1	N
Patterns	Array of Strings	Array of patterns to match on the Bus component to publish to Redis	Pattern, or patterns, to match on the bus	Y
RedisPatterns	Array of Strings	Array of patterns to match for Redis subscription	Pattern, or patterns, to match from Redis	N
RedisConfig	Object	The Redis configuration to use	See Redis Configuration Variables	Y

Redis Configuration Variables

The following table describes the Redis configuration variables:

Parameter	Type	Description	Valid Values	Required
ServerAddress	String	Address of the Redis server to connect	Address of the Redis server, which is running	Y
Port	Unsigned Integer	Port number of the Redis server	Port number, defaults to 6379	N
Username	String	The username to use in authentication and authorization	A valid username, defaults to default	N
Password	String	The password to use in authentication and authorization	A valid password for the specified username	N

Redis Bridge Configuration Example

The following example configures a Redis Bridge component to publish data to Redis on the topics defined in Patterns and subscribes to the topic(s) defined in RedisPatterns to publish data to the bus.

"Patterns": [ "xrt/devices/test/data" ],
"RedisPatterns": ["xrt/devices/bridge/*"],
"RedisConfig":
{
  "ServerAddress": "127.0.0.1",
  "Port":6379,
  "Username":"default",
  "Password":"foobared"
}