start session event

Change-Id: I822c4da7bf0ffda21ed2638ff648ad792ee17f24
terminate session event

Change-Id: Iaa56d210b0e5c4a75545d40595225b2e3625a3f5
compiled successfully

Change-Id: Ie7b0eee6fd4f55df08256cb117021dc09f1bc653
work thread

Change-Id: I0f3b0e6bca792f20880992600d7ed4cc404d3e83
12/1

Change-Id: I7f3199ed6e9202f14a1611666a6b7e1589a6c549