public class ServiceContext {

    String ACCOUNT_SERVICE, SESSION_SERVICE, SEARCH_SERVICE;

    public void setACCOUNT_SERVICE(String ACCOUNT_SERVICE) {
        this.ACCOUNT_SERVICE = ACCOUNT_SERVICE;
    }

    public void setSESSION_SERVICE(String SESSION_SERVICE) {
        this.SESSION_SERVICE = SESSION_SERVICE;
    }

    public void setSEARCH_SERVICE(String SEARCH_SERVICE) {
        this.SEARCH_SERVICE = SEARCH_SERVICE;
    }

    public String getACCOUNT_SERVICE() {
        return ACCOUNT_SERVICE;
    }

    public String getSESSION_SERVICE() {
        return SESSION_SERVICE;
    }

    public String getSEARCH_SERVICE() {
        return SEARCH_SERVICE;
    }
    
    public String toString() { return ACCOUNT_SERVICE + " " + SESSION_SERVICE + " " + SEARCH_SERVICE;}
}

public class ServiceContextFactory {

    public static ServiceContext createContext() {
        return new ServiceContext();
    }
}

public class LayerA {

    private static ServiceContext context;

    public LayerA() {
        context = ServiceContextFactory.createContext();
    }

    public static ServiceContext getContext() {
        return context;
    }

    public void addAccountInfo(String accountService) {
        context.setACCOUNT_SERVICE(accountService);
    }
}

public class LayerB {

    private static ServiceContext context;

    public LayerB(LayerA layerA) {
        this.context = layerA.getContext();
    }

    public static ServiceContext getContext() {
        return context;
    }

    public void addSessionInfo(String sessionService) {
        context.setSESSION_SERVICE(sessionService);
    }
}

public class LayerC {

    public static ServiceContext context;

    public LayerC(LayerB layerB) {
        this.context = layerB.getContext();
    }

    public static ServiceContext getContext() {
        return context;
    }

    public void addSearchInfo(String searchService) {
        context.setSEARCH_SERVICE(searchService);
    }
}

var layerA = new LayerA();
layerA.addAccountInfo(SERVICE);
LOGGER.info("Context = {}",layerA.getContext());
var layerB = new LayerB(layerA);
layerB.addSessionInfo(SERVICE);
LOGGER.info("Context = {}",layerB.getContext());
var layerC = new LayerC(layerB);
layerC.addSearchInfo(SERVICE);
LOGGER.info("Context = {}",layerC.getContext());

Context = SERVICE null null
Context = SERVICE SERVICE null
Context = SERVICE SERVICE SERVICE