Examples with Transaction com.ctrip.framework.apollo.tracer.spi.Transaction used on opensource projects

Example 26 with Transaction

use of com.ctrip.framework.apollo.tracer.spi.Transaction in project apollo by ctripcorp.

the class PortalMetaDomainService method updateMetaServerAddresses.

private void updateMetaServerAddresses(String metaServerAddresses) {
    logger.debug("Selecting meta server address for: {}", metaServerAddresses);
    Transaction transaction = Tracer.newTransaction("Apollo.MetaService", "refreshMetaServerAddress");
    transaction.addData("Url", metaServerAddresses);
    try {
        List<String> metaServers = Lists.newArrayList(metaServerAddresses.split(","));
        // random load balancing
        Collections.shuffle(metaServers);
        boolean serverAvailable = false;
        for (String address : metaServers) {
            address = address.trim();
            // check whether /services/config is accessible
            if (NetUtil.pingUrl(address + "/services/config")) {
                // select the first available meta server
                selectedMetaServerAddressCache.put(metaServerAddresses, address);
                serverAvailable = true;
                logger.debug("Selected meta server address {} for {}", address, metaServerAddresses);
                break;
            }
        }
        // we need to make sure the map is not empty, e.g. the first update might be failed
        if (!selectedMetaServerAddressCache.containsKey(metaServerAddresses)) {
            selectedMetaServerAddressCache.put(metaServerAddresses, metaServers.get(0).trim());
        }
        if (!serverAvailable) {
            logger.warn("Could not find available meta server for configured meta server addresses: {}, fallback to: {}", metaServerAddresses, selectedMetaServerAddressCache.get(metaServerAddresses));
        }
        transaction.setStatus(Transaction.SUCCESS);
    } catch (Throwable ex) {
        transaction.setStatus(ex);
        throw ex;
    } finally {
        transaction.complete();
    }
}