HttpConnectionResolver

Implements: IReferenceable, IConfigurable

Description

The HttpConnectionResolver class is used to retrieve connections for HTTP-based services and clients.

Important points

• In addition to its regular functions, ConnectionResolver is able to parse http:// URIs and validate connection parameters before returning them.

Configuration parameters

• connection:
  • discovery_key: (optional) key to retrieve the connection from IDiscovery
  • … : other connection parameters
• connections: alternative to connection
  • [connection params 1]: first connection parameters
  • …
  • [connection params N]: Nth connection parameters
  • …

References

• *:discovery:*:*:1.0 - (optional) IDiscovery services to resolve a connection

Fields

Instance methods

configure

Configures component by passing configuration parameters.

public configure(config: ConfigParams): void

• config: ConfigParams - configuration parameters to be set.

register

Registers the given connection in all referenced discovery services. This method can be used for dynamic service discovery.

public register(context: IContext): void

• context: IContext - (optional) a context to trace execution through a call chain.

resolve

Resolves a single component connection. If the connections are configured to be retrieved from Discovery service, it finds a IDiscovery and resolves the connection there.

public resolve(context: IContext): Promise<ConfigParams>

• context: IContext - (optional) a context to trace execution through a call chain.
• returns: Promise<ConfigParams> - resolved connection.

resolveAll

Resolves all component connections. If connections are configured to be retrieved from Discovery service it finds a IDiscovery and resolves the connection there.

resolveAll(context: IContext): Promise<ConfigParams>

• context: IContext - (optional) a context to trace execution through a call chain.
• returns: Promise<ConfigParams> - resolved connections.

setReferences

Sets references to dependent components.

public setReferences(references: IReferences): void

• references: IReferences - references to locate the component dependencies.

Examples

let config = ConfigParams.fromTuples(
     "connection.host", "10.1.1.100",
     "connection.port", 8080
);

let connectionResolver = new HttpConnectionResolver();

connectionResolver.configure(config);
connectionResolver.setReferences(references);

let connection = await connectionResolver.resolve("123");
// Now use connection...

See also

• ConnectionParams

• ConnectionResolver