SerialOp.java

public interface SerialOp<T, U> {
    public SerialHandler getHandler();
    public void setHandler(SerialHandler handler);
    public abstract void execute(T arg1, U arg2);
    public void onSuccess();
    public void onFailure(FailureType type, String reason);
    public void onComplete();
    public long getTimeout();
    public String getTag();
    public boolean autoDequeue();
    public boolean ignoreErrors();
}