void init()

in emr-user-role-mapper-application/src/main/java/com/amazon/aws/emr/mapping/MappingInvoker.java [52:84]
32 lines of code
4 McCabe index (conditional complexity)

    void init() {
        try {
            String className = applicationConfiguration.getProperty(Constants.ROLE_MAPPER_CLASS,
                Constants.ROLE_MAPPING_DEFAULT_CLASSNAME);
            log.info("Trying to load {}", className);
            if (isS3BasedProviderImpl(className)) {
                // For our default mapper implementation we need at least the S3 bucket name and key
                Constructor c = Class.forName(className)
                    .getConstructor(String.class, String.class, PrincipalResolver.class);
                String bucketName = applicationConfiguration
                    .getProperty(Constants.ROLE_MAPPING_S3_BUCKET, null);
                String key = applicationConfiguration
                    .getProperty(Constants.ROLE_MAPPING_S3_KEY, null);
                roleMapperProvider = (UserRoleMapperProvider) c
                    .newInstance(bucketName, key, principalResolver);
                log.info("Successfully created the mapper using {}/{}", bucketName, key);
            } else {
                Class clazz = Class.forName(className);
                roleMapperProvider = (UserRoleMapperProvider) clazz.newInstance();
            }
            roleMapperProvider.init(applicationConfiguration.asMap());
            log.info("Initialized the mapper.");
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | NoSuchMethodException | InvocationTargetException e) {
            log.error("Could not load the mapper " + e.getMessage());
            throw new RuntimeException("Could not load the mapper class", e);
        } catch (Throwable t) {
          log.error("Could not load the mapper " + t.getMessage());
          throw new RuntimeException("Could not load the mapper class", t);
        }
        int refreshIntervalMins = Integer.parseInt(applicationConfiguration.getProperty
                (Constants.ROLE_MAPPPING_REFRESH_INTERVAL_MIN, Constants.ROLE_MAPPPING_DEFAULT_REFRESH_INTERVAL_MIN));
        createRefreshTask(Math.max(Constants.ROLE_MAPPING_MIN_REFRESH_INTERVAL_MIN, refreshIntervalMins));
    }