My View Model

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package com.eksad.ddms.gigr.h3.web.viewmodel.checkarea;

import com.eksad.ddms.Gmarkers;
import com.eksad.ddms.gigr.h3.dto.AhassDTO;
import com.eksad.ddms.gigr.h3.dto.StockDTO;
import com.eksad.ddms.gigr.h3.dto.checkarea.CheckAreaDTO;
import com.eksad.ddms.gigr.h3.web.service.checkarea.CheckAreaService;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import org.zkoss.bind.annotation.AfterCompose;
import org.zkoss.bind.annotation.Command;
import org.zkoss.bind.annotation.Init;
import org.zkoss.bind.annotation.NotifyChange;
import org.zkoss.gmaps.Gmaps;
import org.zkoss.gmaps.Gmarker;
import org.zkoss.gmaps.Mapitem;
import org.zkoss.xel.VariableResolver;
import org.zkoss.zk.ui.Component;
import org.zkoss.zk.ui.select.annotation.Wire;
import org.zkoss.zk.ui.util.Composer;
import org.zkoss.zk.ui.util.Template;

/**
 *
 * @author eksad
 */
public class CheckAvailabilityOnAreaVM {
   @Wire
   Gmaps gmaps;
    private Double lat;
    private Double lng;
    List<CheckAreaDTO> areaList=new ArrayList<>();
    CheckAreaService serv;
    @Init
    public void init() {
        gmaps=new Gmaps();
        gmaps.enableBindingAnnotation();
        serv=new CheckAreaService();
        lat=-6.206040;
        lng=106.818771;
        areaList= serv.findNearBy(lat, lng);
        for(CheckAreaDTO area : areaList){
            if(area.getLatitude()!=null && area.getLongitute()!=null){
                Gmarker marker=new Gmarker();
                marker.setLat(area.getLatitude());
                marker.setLng(area.getLongitute());
                marker.setOpen(true);
                marker.setParent(gmaps);
            }
        }
        gmaps.focus();
    }
   @AfterCompose
   @NotifyChange("areaList")
   public void aftercomp(){
        CheckAreaService serv=new CheckAreaService();
        areaList= serv.findNearBy(lat, lng);
        lat=-6.206040;
        lng=106.818771;
        areaList= serv.findNearBy(lat, lng);
        for(CheckAreaDTO area : areaList){
            if(area.getLatitude()!=null && area.getLongitute()!=null){
                Gmarker marker=new Gmarker();
                marker.setLat(area.getLatitude());
                marker.setLng(area.getLongitute());
                marker.setOpen(true);
                marker.setParent(gmaps);
            }
        }

    }

    public Double getLat() {
        return lat;
    }

    public void setLat(Double lat) {
        this.lat = lat;
    }

    public Double getLng() {
        return lng;
    }

    public void setLng(Double lng) {
        this.lng = lng;
    }

    public Gmaps getGmaps() {
        return gmaps;
    }

    public void setGmaps(Gmaps gmaps) {
        this.gmaps = gmaps;
    }

    public List<CheckAreaDTO> getAreaList() {
        return areaList;
    }

    public void setAreaList(List<CheckAreaDTO> areaList) {
        this.areaList = areaList;
    }

}