public void addACL()

in priam/src/main/java/com/netflix/priam/aws/AWSMembership.java [166:202]
33 lines of code
5 McCabe index (conditional complexity)

    public void addACL(Collection<String> listIPs, int from, int to) {
        AmazonEC2 client = null;
        try {
            client = getEc2Client();
            List<IpPermission> ipPermissions = new ArrayList<>();
            ipPermissions.add(
                    new IpPermission()
                            .withFromPort(from)
                            .withIpProtocol("tcp")
                            .withIpRanges(listIPs)
                            .withToPort(to));

            if (isClassic()) {
                client.authorizeSecurityGroupIngress(
                        new AuthorizeSecurityGroupIngressRequest(
                                config.getACLGroupName(), ipPermissions));
                if (logger.isInfoEnabled()) {
                    logger.info("Done adding ACL to classic: " + StringUtils.join(listIPs, ","));
                }
            } else {
                AuthorizeSecurityGroupIngressRequest sgIngressRequest =
                        new AuthorizeSecurityGroupIngressRequest();
                sgIngressRequest.withGroupId(getVpcGoupId());
                // fetch SG group id for vpc account of the running instance.
                client.authorizeSecurityGroupIngress(
                        sgIngressRequest.withIpPermissions(
                                ipPermissions)); // Adding peers' IPs as ingress to the running
                // instance SG
                if (logger.isInfoEnabled()) {
                    logger.info("Done adding ACL to vpc: " + StringUtils.join(listIPs, ","));
                }
            }

        } finally {
            if (client != null) client.shutdown();
        }
    }