exmaple2.java

    @Override
    // if you want to do atomic update over cache entry
    public void updateAlertEntry(String serviceId, String serviceCode, AlertEntry alertEntry) {
        //get the JSR cache reference 
        final Cache<String, List<AlertEntry>> alertsCache = getAlertsCache();
        // then invoke atomic update on the cache entry 
        alertsCache.invoke(serviceId, (mutableEntry, objects) -> {
            if (mutableEntry.exists() && mutableEntry.getValue() != null) {
                logger.debug("updating alert entry into the cache store invoke: {},{}",serviceId,serviceCode);
                final List<AlertEntry> alertEntries = mutableEntry.getValue();
                // remove only if it has the error code
                alertEntries.removeIf(alertEntry1 -> alertEntry1.getErrorCode().equals(serviceCode));
                alertEntries.add(alertEntry);
                mutableEntry.setValue(alertEntries);
            }else{
                throw new ResourceNotFoundException(String.format("Alert for %s with %s not found", serviceId,serviceCode));
            }
            // by api design nothing needed here
            return null;
        });
    }