how application connection auto redirect when meeting mysql group replication write node fail

As we known, MySQL Group Replication(GR) is coming in MySQL 5.7.17 ! We are doing some research on it and recently we have one question :

How application(always Java) connections(Connection Pool) auto redirect when meeting mysql group replication write node fail(Single-Primary Mode)?

Is there any solutions to sovle the question above?

After some research, this and this, just tell us how to make write-read router with GR.