一个使用ABAP Push Channel开发的乒乓球游戏，可以双打
https://ldciag.jerry.corp:44354/sap/bc/apc_test/ping_pong/game?sap-client=001
Then player A and player B enter the game separately by running report RS_APC_PING_PONG.
Click start to join the game and up and down to move the tray.