public void onManagementBecomingMaster()

in software/webapp/src/main/java/org/apache/brooklyn/entity/webapp/DynamicWebAppFabricImpl.java [35:82]
41 lines of code
5 McCabe index (conditional complexity)

    public void onManagementBecomingMaster() {
        // Enricher attribute setup.  A way of automatically discovering these (but avoiding
        // averaging things like HTTP port and response codes) would be neat.
        List<? extends List<? extends AttributeSensor<? extends Number>>> summingEnricherSetup = ImmutableList.of(
                ImmutableList.of(REQUEST_COUNT, REQUEST_COUNT),
                ImmutableList.of(ERROR_COUNT, ERROR_COUNT),
                ImmutableList.of(REQUESTS_PER_SECOND_LAST, REQUESTS_PER_SECOND_LAST),
                ImmutableList.of(REQUESTS_PER_SECOND_IN_WINDOW, REQUESTS_PER_SECOND_IN_WINDOW),
                ImmutableList.of(TOTAL_PROCESSING_TIME, TOTAL_PROCESSING_TIME)
        );
        
        List<? extends List<? extends AttributeSensor<? extends Number>>> averagingEnricherSetup = ImmutableList.of(
                ImmutableList.of(REQUEST_COUNT, REQUEST_COUNT_PER_NODE),
                ImmutableList.of(ERROR_COUNT, ERROR_COUNT_PER_NODE),
                ImmutableList.of(REQUESTS_PER_SECOND_LAST, REQUESTS_PER_SECOND_LAST_PER_NODE),
                ImmutableList.of(REQUESTS_PER_SECOND_IN_WINDOW, REQUESTS_PER_SECOND_IN_WINDOW_PER_NODE),
                ImmutableList.of(TOTAL_PROCESSING_TIME, TOTAL_PROCESSING_TIME_PER_NODE)
        );
        
        for (List<? extends AttributeSensor<? extends Number>> es : summingEnricherSetup) {
            AttributeSensor<? extends Number> t = es.get(0);
            AttributeSensor<? extends Number> total = es.get(1);
            enrichers().add(Enrichers.builder()
                    .aggregating(t)
                    .publishing(total)
                    .fromMembers()
                    .computingSum()
                    .build());
        }
        
        for (List<? extends AttributeSensor<? extends Number>> es : averagingEnricherSetup) {
            @SuppressWarnings("unchecked")
            AttributeSensor<Number> t = (AttributeSensor<Number>) es.get(0);
            @SuppressWarnings("unchecked")
            AttributeSensor<Double> average = (AttributeSensor<Double>) es.get(1);
            
            // TODO This needs to respond to changes in FABRIC_SIZE as well, to recalculate
            enrichers().add(Enrichers.builder()
                    .transforming(t)
                    .publishing(average)
                    .computing(new Function<Number, Double>() {
                            @Override public Double apply(@Nullable Number input) {
                                Integer size = getAttribute(DynamicWebAppFabric.FABRIC_SIZE);
                                return (size != null && input != null) ? (input.doubleValue() / size) : null;
                            }})
                    .build());
        }
    }