我試圖更新一個持續時間(兩個日期之間的差異被捕獲到)當我將fireDrillEvacTime添加到以下堆棧跟蹤轉儲的渲染時: JBWEB000309: type JBWEB000066: Exception report
JBWEB000068: message <f:ajax> contains an unknown id 'fireDrillStartTime,fireDrillEvacT
所以我想用a4j:poll每秒輪詢一個循環的計數器。 所以,如果我有這樣一個循環: while(fileCount != 100){
//count the # of files in dir, assuming these files are being downloaded to the dir
//so the # of files is always changing