public static List createComponentStages()

in bigtop-manager-server/src/main/java/org/apache/bigtop/manager/server/command/helper/ComponentStageHelper.java [57:116]
55 lines of code
14 McCabe index (conditional complexity)

    public static List<Stage> createComponentStages(
            Map<String, List<String>> componentHosts, List<Command> commands, CommandDTO commandDTO) {
        List<Stage> stages = new ArrayList<>();
        List<String> componentNames = new ArrayList<>(componentHosts.keySet());
        List<String> todoList = getTodoList(componentNames, commands);

        for (String componentCommand : todoList) {
            String[] split = componentCommand.split("-");
            String componentName = split[0].toLowerCase();
            Command command = Command.valueOf(split[1].toUpperCase());

            List<String> hostnames = componentHosts.get(componentName);
            if (CollectionUtils.isEmpty(hostnames)) {
                continue;
            }

            StageContext stageContext;
            switch (command) {
                case ADD:
                    stageContext = createStageContext(componentName, hostnames, commandDTO);
                    stages.add(new ComponentAddStage(stageContext));
                    break;
                case START:
                    if (!StackUtils.isClientComponent(componentName)) {
                        stageContext = createStageContext(componentName, hostnames, commandDTO);
                        stages.add(new ComponentStartStage(stageContext));
                    }
                    break;
                case STOP:
                    if (!StackUtils.isClientComponent(componentName)) {
                        stageContext = createStageContext(componentName, hostnames, commandDTO);
                        stages.add(new ComponentStopStage(stageContext));
                    }
                    break;
                case CHECK:
                    if (!StackUtils.isClientComponent(componentName)) {
                        stageContext = createStageContext(componentName, List.of(hostnames.get(0)), commandDTO);
                        stages.add(new ComponentCheckStage(stageContext));
                    }
                    break;
                case CONFIGURE:
                    stageContext = createStageContext(componentName, hostnames, commandDTO);
                    stages.add(new ComponentConfigureStage(stageContext));
                    break;
                case INIT:
                    stageContext = createStageContext(componentName, hostnames, commandDTO);
                    stages.add(new ComponentInitStage(stageContext));
                    break;
                case PREPARE:
                    // Prepare phase runs after component started, client component shouldn't create this.
                    if (!StackUtils.isClientComponent(componentName)) {
                        stageContext = createStageContext(componentName, hostnames, commandDTO);
                        stages.add(new ComponentPrepareStage(stageContext));
                    }
                    break;
            }
        }

        return stages;
    }