You need to set up your project and environment go be able to use the Workflow API Services

<component-import name="Comala Workflows API" key="workflowService" interface="com.comalatech.workflow.WorkflowService"/>
<component-import name="Comala State Services" key="stateService" interface="com.comalatech.workflow.StateService"/>
<component-import name="Comala Tasks Services" key="taskService" interface="com.comalatech.workflow.TaskService"/>
<component-import name="Comala Approvals Services" key="approvalService" interface="com.comalatech.workflow.ApprovalService"/>
<component-import name="Comala Document Activity API" key="documentActivitySevice" interface="com.comalatech.workflow.DocumentActivityService"/>

public class ShowStateMacro extends BaseMacro {

    private PageManager pageManager;

    private StateService stateService;

    public boolean hasBody() {
        return false;
    }

    public RenderMode getBodyRenderMode() {
        return RenderMode.NO_RENDER;
    }

    public String execute(Map parameters, String body, RenderContext renderContext) throws MacroException {
        AbstractPage page = (AbstractPage) ((PageContext)renderContext).getEntity();
        boolean isPublishedState = "releaseview".equalsIgnoreCase(ActionContext.getContext().getName());
        
        State state;
        if (isPublishedState) {
            state = stateService.getPublishedState(page);
        } else {
            state = stateService.getCurrentState(page);
        } if (state == null) {
            throw new MacroException("page does not have published state"); 
        }
        Map<String,Object> contextMap = MacroUtils.defaultVelocityContext();
        contextMap.put("state",state);
        contextMap.put("page",page);
        contextMap.put("pageManger",pageManager);
        return VelocityUtils.getRenderedTemplate("templates/com/comalatech/confluence/workflowutils/state.vm", contextMap);
    }

    public void setStateService(StateService stateService) {
        this.stateService = stateService;
    }

    public void setPageManager(PageManager pageManager) {
        this.pageManager = pageManager;
    }
}

@ComponentImport
private WorkflowService workflowService;