[SCB-425] Add an easier way to read configurations

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Duplicate
• Component/s: Java-Chassis
• Assignee: Unassigned
• Reporter: liubao
• Created: 22/Mar/18 08:04
• Updated: 03/Feb/19 07:31
• Resolved: 03/Feb/19 07:31

Description

Background:

Read configurations for microservice or operation is quite common in code, e.g.

config = CONSUMER_FAULTINJECTION + serviceName + ".schemas." + schema + "."
+ CONSUMER_FAULTINJECTION_POLICY_PROTOCOLS + invocation.getTransport().getName() + "." + key;
value = getConfigValue(config);
if ((value != FAULT_INJECTION_DEFAULT_VALUE)) {
return value;
}
config = CONSUMER_FAULTINJECTION + serviceName + "." + CONSUMER_FAULTINJECTION_POLICY_PROTOCOLS
+ invocation.getTransport().getName() + "." + key;
value = getConfigValue(config);
if ((value != FAULT_INJECTION_DEFAULT_VALUE)) {
return value;
}
config = CONSUMER_FAULTINJECTION_GLOBAL + CONSUMER_FAULTINJECTION_POLICY_PROTOCOLS
+ invocation.getTransport().getName() + "." + key;

This code is very long and add callbacks if hard for user code. 

 

Suggestions:

We need a easier way to read configurations, code snippets: 

@Configuration(name="cse.myconfiguration")
class MyConfiguration
{
   @Configuration(name="prop1")
   String prop1;
   @Configuration(name="prop2")
   String prop2;
}

MyConfiguration configuration = ConfigurationFactory.getReference(invocation.getQualifiedMicroserviceName())