LogLevelPoller for Consul

[rasheedamir]

Requirements:

• The log level can be changed on runtime without requiring a restart of the application.
• There can be global log levels but then individual applications can override those log levels.

For inspiration we can look into following:

https://github.com/intappx/consul-archaius/blob/master/src/main/java/com/intapp/archaius/consul/ConsulConfigurationSource.java https://github.com/boundary/archaius-consul/blob/master/src/main/java/com/boundary/config/ConsulWatchedConfigurationSource.java https://github.com/researchgate/archaius-consul/blob/master/src/main/java/net/researchgate/archaius/ConsulConfigurationSource.java

    @RequestMapping(value = RestPath.API_VERSION_1_LOG,
            method = RequestMethod.PUT)
    @ResponseStatus(HttpStatus.NO_CONTENT)
    @Timed
    public void changeLevel(@RequestBody LoggerDTO jsonLogger)
    {
        LoggerContext context = (LoggerContext) LoggerFactory.getILoggerFactory();
        context.getLogger(jsonLogger.getName()).setLevel(Level.valueOf(jsonLogger.getLevel()));
    }