@ManagedBean(name="manager")
@SessionScoped
public class ManagerBean implements Serializable {
  
	private static final long serialVersionUID = 1L;

	private DataBean dataBean = new DataBean();

	private String key;
	private String value;
	
	public Property getSelectedProp() {
		return selectedProp;
	}

	public void setSelectedProp(Property selectedProp) {
		this.selectedProp = selectedProp;
	}

	public String getKey() {
		return key;
	}

	public void setKey(String key) {
		this.key = key;
		System.out.println("key="+key);
	}

	public String getValue() {
		return value;
	}

	public void setValue(String value) {
		this.value = value;
		System.out.println("value="+value);
	}

	public void save() {
		dataBean.put(key, value);
		key = null;
		value = null;
	}
        . . .

action="#{manager.save}"

public void save() {
   dataBean.put(key, value);
   refresh("targetId");
}