Examples with RefreshEvent org.springframework.cloud.endpoint.event.RefreshEvent used on opensource projects

Example 1 with RefreshEvent

use of org.springframework.cloud.endpoint.event.RefreshEvent in project spring-cloud-consul by spring-cloud.

the class ConfigWatch method watchConfigKeyValues.

@Scheduled(fixedDelayString = "${spring.cloud.consul.config.watch.delay:1000}")
@Timed(value = "consul.watch-config-keys")
public void watchConfigKeyValues() {
    if (this.running.get()) {
        for (String context : this.consulIndexes.keySet()) {
            // turn the context into a Consul folder path (unless our config format are FILES)
            if (properties.getFormat() != FILES && !context.endsWith("/")) {
                context = context + "/";
            }
            try {
                Long currentIndex = this.consulIndexes.get(context);
                if (currentIndex == null) {
                    currentIndex = -1L;
                }
                // use the consul ACL token if found
                String aclToken = properties.getAclToken();
                if (StringUtils.isEmpty(aclToken)) {
                    aclToken = null;
                }
                Response<List<GetValue>> response = this.consul.getKVValues(context, aclToken, new QueryParams(this.properties.getWatch().getWaitTime(), currentIndex));
                // reducing churn if there wasn't anything
                if (response.getValue() != null && !response.getValue().isEmpty()) {
                    Long newIndex = response.getConsulIndex();
                    if (newIndex != null && !newIndex.equals(currentIndex)) {
                        // don't publish the same index again, don't publish the first time (-1) so index can be primed
                        if (!this.consulIndexes.containsValue(newIndex) && !currentIndex.equals(-1L)) {
                            RefreshEventData data = new RefreshEventData(context, currentIndex, newIndex);
                            this.publisher.publishEvent(new RefreshEvent(this, data, data.toString()));
                        }
                        this.consulIndexes.put(context, newIndex);
                    }
                }
            } catch (Exception e) {
                // only fail fast on the initial query, otherwise just log the error
                if (firstTime && this.properties.isFailFast()) {
                    log.error("Fail fast is set and there was an error reading configuration from consul.");
                    ReflectionUtils.rethrowRuntimeException(e);
                } else if (log.isTraceEnabled()) {
                    log.trace("Error querying consul Key/Values for context '" + context + "'", e);
                } else if (log.isWarnEnabled()) {
                    // simplified one line log message in the event of an agent failure
                    log.warn("Error querying consul Key/Values for context '" + context + "'. Message: " + e.getMessage());
                }
            }
        }
    }
    firstTime = false;
}