public void handleEvent()

in event/src/main/java/org/apache/karaf/cellar/event/LocalEventListener.java [36:84]
40 lines of code
13 McCabe index (conditional complexity)

    public void handleEvent(Event event) {

        // ignore log entry event
        if (event.getTopic().startsWith("org/osgi/service/log/LogEntry"))
            return;

        // check if the producer is ON
        if (eventProducer.getSwitch().getStatus().equals(SwitchStatus.OFF)) {
            LOGGER.debug("CELLAR EVENT: cluster event producer is OFF");
            return;
        }

        try {
            if (event != null && event.getTopic() != null) {
                Set<Group> groups = null;
                try {
                    groups = groupManager.listLocalGroups();
                } catch (Exception e) {
                    LOGGER.warn("Failed to list local groups. Is Cellar uninstalling ?");
                    return;
                }

                // filter already processed events
                if (hasEventProperty(event, Constants.EVENT_PROCESSED_KEY)) {
                    if (event.getProperty(Constants.EVENT_PROCESSED_KEY).equals(Constants.EVENT_PROCESSED_VALUE)) {
                        LOGGER.debug("CELLAR EVENT: filtered out event {}", event.getTopic());
                        return;
                    }
                }

                if (groups != null && !groups.isEmpty()) {
                    for (Group group : groups) {
                        String topicName = event.getTopic();
                        Map<String, Serializable> properties = getEventProperties(event);
                        if (isAllowed(group, Constants.CATEGORY, topicName, EventType.OUTBOUND)) {
                            // broadcast the event
                            ClusterEvent clusterEvent = new ClusterEvent(topicName, properties);
                            clusterEvent.setSourceGroup(group);
                            clusterEvent.setSourceNode(clusterManager.getNode());
                            clusterEvent.setLocal(clusterManager.getNode());
                            eventProducer.produce(clusterEvent);
                        } else LOGGER.trace("CELLAR EVENT: event {} is marked as BLOCKED OUTBOUND for cluster group {}", topicName, group.getName());
                    }
                }
            }
        } catch (Exception e) {
            LOGGER.error("CELLAR EVENT: failed to handle event", e);
        }
    }