public void removeACL()

in priam/src/main/java/com/netflix/priam/aws/AWSMembership.java [237:274]
34 lines of code
5 McCabe index (conditional complexity)

    public void removeACL(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.revokeSecurityGroupIngress(
                        new RevokeSecurityGroupIngressRequest(
                                config.getACLGroupName(), ipPermissions));
                if (logger.isInfoEnabled()) {
                    logger.info(
                            "Done removing from ACL within classic env for running instance: "
                                    + StringUtils.join(listIPs, ","));
                }
            } else {
                RevokeSecurityGroupIngressRequest req = new RevokeSecurityGroupIngressRequest();
                // fetch SG group id for vpc account of the running instance.
                req.withGroupId(getVpcGoupId());
                // Adding peers' IPs as ingress to the running instance SG
                client.revokeSecurityGroupIngress(req.withIpPermissions(ipPermissions));
                if (logger.isInfoEnabled()) {
                    logger.info(
                            "Done removing from ACL within vpc env for running instance: "
                                    + StringUtils.join(listIPs, ","));
                }
            }

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