MemoryDiscovery

Discovery service that keeps connections in memory.

Implements: IDiscovery, IReconfigurable

Description

The MemoryDiscovery class allows you to create discovery services that keep connections in memory.

Configuration parameters

[connection key 1]:
… : connection parameters for key 1
[connection key 2]:
… : connection parameters for key N

Constructors

Creates a new instance of discovery service.

public constructor(config: ConfigParams = null)

config: ConfigParams - (optional) configuration with connection parameters.

Instance methods

configure

Configures component by passing configuration parameters.

public MemoryDiscovery(ConfigParams config)

config: ConfigParams - configuration parameters to be set.

readConnections

Reads connections from configuration parameters. Each section represents an individual Connection params

public void readConnections(ConfigParams config)

connections: ConfigParams - configuration parameters to be read

register

Registers connection parameters into the discovery service.

public void register(IContext context, String key, ConnectionParams connection)

context: IContext - (optional) a context to trace execution through call chain.
key: string - a key to uniquely identify the connection parameters.
connection: ConnectionParams - a connection to be registered.

resolveAll

Resolves all connection parameters by their key.

public List<ConnectionParams> resolveAll(IContext context, String key)

context: IContext - (optional) a context to trace execution through call chain.
key: String - a key to uniquely identify the connections.
returns: List<ConnectionParams> - a list with resolved connections.

resolveOne

Resolves a single connection parameters by its key.

public ConnectionParams resolveOne(IContext context, String key)

context: IContext - (optional) a context to trace execution through call chain.
key: String - a key to uniquely identify the connection.
returns: Promise<ConnectionParams> - a resolved connection.

Examples

{
  ConfigParams config = ConfigParams.fromTuples(
       "key1.host", "10.1.1.100",
       "key1.port", "8080",
       "key2.host", "10.1.1.100",
       "key2.port", "8082"
  );
 
  MemoryDiscovery discovery = new MemoryDiscovery();
  discovery.readConnections(config);
 
  discovery.resolve("123", "key1");
  }