public synchronized void run()

in meecrowave-letsencrypt/src/main/java/org/apache/meecrowave/letencrypt/LetsEncryptReloadLifecycle.java [103:159]
49 lines of code
9 McCabe index (conditional complexity)

    public synchronized void run() {
        final KeyPair userKeyPair = loadOrCreateKeyPair(config.getUserKeySize(), config.getUserKeyLocation());
        final KeyPair domainKeyPair = loadOrCreateKeyPair(config.getDomainKeySize(), config.getDomainKey());

        final Session session = new Session(config.getEndpoint());
        try {
            final Account account = new AccountBuilder().agreeToTermsOfService().useKeyPair(userKeyPair).create(session);
            final Order order = account.newOrder().domains(config.getDomains().trim().split(",")).create();
            final boolean updated = order.getAuthorizations().stream().map(authorization -> {
                try {
                    return authorize(authorization);
                } catch (final AcmeException e) {
                    getLogger().error(e.getMessage(), e);
                    return false;
                }
            }).reduce(false, (previous, val) -> previous || val);
            if (!updated) {
                return;
            }

            final CSRBuilder csrBuilder = new CSRBuilder();
            csrBuilder.addDomains(config.getDomains());
            csrBuilder.sign(domainKeyPair);

            try (final Writer writer = new BufferedWriter(new FileWriter(config.getDomainCertificate()))) {
                csrBuilder.write(writer);
            }

            order.execute(csrBuilder.getEncoded());

            try {
                int attempts = config.getRetryCount();
                while (order.getStatus() != Status.VALID && attempts-- > 0) {
                    if (order.getStatus() == Status.INVALID) {
                        throw new AcmeException("Order failed... Giving up.");
                    }
                    Thread.sleep(config.getRetryTimeoutMs());
                    order.update();
                }
            } catch (final InterruptedException ex) {
                getLogger().error(ex.getMessage());
                Thread.currentThread().interrupt();
                return;
            }

            final Certificate certificate = order.getCertificate();
            getLogger().info("Got new certificate " + certificate.getLocation() + " for domain(s) " + config.getDomains());

            try (final Writer writer = new BufferedWriter(new FileWriter(config.getDomainChain()))) {
                certificate.writeCertificate(writer);
            }

            protocol.reloadSslHostConfigs();
        } catch (final AcmeException | IOException ex) {
            getLogger().error(ex.getMessage(), ex);
        }
    }