public Applications getApplicationDeltas()

in eureka-core/src/main/java/com/netflix/eureka/registry/AbstractInstanceRegistry.java [872:921]
46 lines of code
7 McCabe index (conditional complexity)

    public Applications getApplicationDeltas() {
        GET_ALL_CACHE_MISS_DELTA.increment();
        Applications apps = new Applications();
        apps.setVersion(responseCache.getVersionDelta().get());
        Map<String, Application> applicationInstancesMap = new HashMap<String, Application>();
        write.lock();
        try {
            Iterator<RecentlyChangedItem> iter = this.recentlyChangedQueue.iterator();
            logger.debug("The number of elements in the delta queue is : {}",
                    this.recentlyChangedQueue.size());
            while (iter.hasNext()) {
                Lease<InstanceInfo> lease = iter.next().getLeaseInfo();
                InstanceInfo instanceInfo = lease.getHolder();
                logger.debug(
                        "The instance id {} is found with status {} and actiontype {}",
                        instanceInfo.getId(), instanceInfo.getStatus().name(), instanceInfo.getActionType().name());
                Application app = applicationInstancesMap.get(instanceInfo
                        .getAppName());
                if (app == null) {
                    app = new Application(instanceInfo.getAppName());
                    applicationInstancesMap.put(instanceInfo.getAppName(), app);
                    apps.addApplication(app);
                }
                app.addInstance(new InstanceInfo(decorateInstanceInfo(lease)));
            }

            boolean disableTransparentFallback = serverConfig.disableTransparentFallbackToOtherRegion();

            if (!disableTransparentFallback) {
                Applications allAppsInLocalRegion = getApplications(false);

                for (RemoteRegionRegistry remoteRegistry : this.regionNameVSRemoteRegistry.values()) {
                    Applications applications = remoteRegistry.getApplicationDeltas();
                    for (Application application : applications.getRegisteredApplications()) {
                        Application appInLocalRegistry =
                                allAppsInLocalRegion.getRegisteredApplications(application.getName());
                        if (appInLocalRegistry == null) {
                            apps.addApplication(application);
                        }
                    }
                }
            }

            Applications allApps = getApplications(!disableTransparentFallback);
            apps.setAppsHashCode(allApps.getReconcileHashCode());
            return apps;
        } finally {
            write.unlock();
        }
    }