protected Object doExecute()

in shell/src/main/java/org/apache/karaf/cellar/shell/handler/HandlersSupport.java [32:98]
58 lines of code
15 McCabe index (conditional complexity)

    protected Object doExecute(String handlerName, List<String> nodeIdsOrAliases, Boolean status) throws Exception {

        ManageHandlersCommand command = new ManageHandlersCommand(clusterManager.generateId());
        command.setTimeout(timeout * 1000);

        // looking for nodes and check if exist
        Set<Node> recipientList = new HashSet<Node>();
        if (nodeIdsOrAliases != null && !nodeIdsOrAliases.isEmpty()) {
            for (String nodeIdOrAlias : nodeIdsOrAliases) {
                Node node = clusterManager.findNodeByIdOrAlias(nodeIdOrAlias);
                if (node == null) {
                    System.err.println("Cluster node " + nodeIdOrAlias + " doesn't exist");
                } else {
                    recipientList.add(node);
                }
            }
        } else {
            if (status == null) {
                // in case of status display, select all nodes
                recipientList = clusterManager.listNodes();
            } else {
                // in case of status change, select only the local node
                recipientList.add(clusterManager.getNode());
            }
        }

        if (recipientList.size() < 1) {
            return null;
        }

        command.setDestination(recipientList);
        command.setHandlerName(handlerName);
        command.setStatus(status);

        Map<Node, ManageHandlersResult> results = executionContext.execute(command);
        if (results == null || results.isEmpty()) {
            System.out.println("No result received within given timeout");
        } else {
            ShellTable table = new ShellTable();
            table.column(" ");
            table.column("Node");
            table.column("Status");
            table.column("Event Handler");
            for (Map.Entry<Node,ManageHandlersResult> handlersResultEntry : results.entrySet()) {
                Node node = handlersResultEntry.getKey();
                String local = "";
                if (node.equals(clusterManager.getNode())) {
                    local = "x";
                }
                ManageHandlersResult result = handlersResultEntry.getValue();
                if (result != null && result.getHandlers() != null) {

                    for (Map.Entry<String,String>  handlerEntry: result.getHandlers().entrySet()) {
                        String handler =  handlerEntry.getKey();
                        String s = handlerEntry.getValue();
                        String nodeName = node.getAlias();
                        if (nodeName == null) {
                            nodeName = node.getId();
                        }
                        table.addRow().addContent(local, nodeName, s, handler);
                    }
                }
            }
            table.print(System.out);
        }
        return null;
    }