public ManageHandlersResult execute()

in core/src/main/java/org/apache/karaf/cellar/core/control/ManageHandlersCommandHandler.java [50:97]
42 lines of code
12 McCabe index (conditional complexity)

    public ManageHandlersResult execute(ManageHandlersCommand command) {
        ManageHandlersResult result = new ManageHandlersResult(command.getId());

        BundleContext bundleContext = ((BundleReference) getClass().getClassLoader()).getBundle().getBundleContext();
        ServiceReference[] references = new ServiceReference[0];
        try {
            references = bundleContext.getServiceReferences(EventHandler.class.getName(), EventHandler.MANAGED_FILTER);
            if (references != null && references.length > 0) {
                for (ServiceReference ref : references) {
                    EventHandler handler = (EventHandler) bundleContext.getService(ref);

                    // unproxy if required (due to the Service Guard of Karaf 3.0.x)
                    if (proxyManager.isProxy(handler)) {
                        handler = (EventHandler) proxyManager.unwrap(handler).call();
                    }

                    if (command.getHandlerName() == null) {
                        result.getHandlers().put(handler.getClass().getName(), handler.getSwitch().getStatus().name());
                    } else {
                        if (command.getHandlerName().equals(handler.getClass().getName())) {
                            if (command.getStatus() != null) {
                                if (command.getStatus()) {
                                    // persist the handler switch status to configuration admin
                                    persist(handler.getClass().getName(), SwitchStatus.ON);
                                    handler.getSwitch().turnOn();
                                } else {
                                    // persist the handler switch status to configuration admin
                                    persist(handler.getClass().getName(), SwitchStatus.OFF);
                                    handler.getSwitch().turnOff();
                                }
                            }
                            result.getHandlers().put(handler.getClass().getName(), handler.getSwitch().getStatus().name());
                            break;
                        }
                    }
                }
            }
        } catch (Exception e) {
            LOGGER.error("Can't get the current handlers status", e);
        } finally {
            if (references != null) {
                for (ServiceReference ref : references) {
                    bundleContext.ungetService(ref);
                }
            }
        }
        return result;
    }