そのため、私のプログラムの詳細をできるだけ一般的に説明すると同時に、一般的な要点を理解しようとします。JobManager と JobWorkers という 2 つの重要なオブジェクトがあります。JobWorker には、完了するまで一定の間隔で実行するタスクがあります。ジョブが開始されることはないため、ジョブが完了したときに何が起こるかは無視します。JobManager のタイマーはオフに設定されていますが、JobWorker タイマーは開始されていません。以下は、状況を理解するのに役立つ疑似コードです。
public class JobWorker
{
private String jobName;
private Timer timer;
private Calendar startTime;
public JobWorker(String jobName, Calendar startTime, otherFields)
{
this.jobName = jobName;
this.startTime = startTime;
this.timer = new Timer("EmailJob" + jobName + "-timer");
//set other fields
}
public void start()
{
timer.schedule(new TimerTask(){
public void run()
{
//Do stuff - this is where nothing is happening
}
}, 0, 60000);
}
//Equals method and other stuff
}
public class JobManager
{
private List<JobWorker> activeWorkers = new ArrayList<JobWorker>();
private List<JobWorker> pausedWorkers = new ArrayList<JobWorker>();
private Timer timer;
public JobManager()
{
//loads workers from database
timer = new Timer("JobManager-timer");
loadJobs();
timer.schedule(new TimerTask(){
public void run()
{
//I see this statement every minute as expected
logger.info("EmailJobManager timer run started.");
for(JobWorker worker : pausedWorkers)
{
Calendar c = new GregorianCalendar();
//I can see worker.getStartTime() in client gui so I know that they have already passed
if(c.compareTo(worker.getStartTime()) > 0)
{
//Never see these log statements
logger.info("Memory Address in manager timer loop 2 for " + worker.getEmailJobName() + " ({})", worker.toString());
SimpleDateFormat sdf = new SimpleDateFormat("MM/dd/yy - HH:mm");
logger.info("Comparing current time ({}) to JobWorker " + worker.getJobName() + " start time ({})", sdf.format(c.getTime()), sdf.format(worker.getStartDate()));
activeWorkers.add(worker);
pausedWorkers.remove(worker);
worker.start();
}
}
}
}, 0, 60000);
}
public void addWorker(necessary fields)
{
//Create JobWorker newWorker = new JobWorker(jobName, blah blah)
pausedWorkers.add(newWorker);
}
/**
* Checks to see if any jobs were not completed as expected due to hardware error. Recreates the EmailJob and EmailJobWorker responsible.
*/
private void loadJobs()
{
String SQL = "SELECT * FROM email_jobs";
List<Map<String, Object>> rows = jt.queryForList(SQL);
for(Map<String, Object> row : rows)
{
JobWorker worker = new JobWorker(stuff it needs from SQL);
//I see these debug statements
logger.info("Worker " + worker.getJobName() + " has been added to pausedWorkers list with memory address ({})", worker.toString());
pausedWorkers.add(worker);
logger.info("Job " + jobName + " loaded sucessfully.");
}
}
JobWorker メモリ アドレス (基本的に Object.toString) を出力して、それらのディープ/シャロー コピーに異常があるかどうかを確認するために、さらにデバッグ ステートメントを追加します。何か案は？
編集：さて、何が起こっているのか完全に途方に暮れています。これが完全なクラスです。
そこには敏感なものは何もないので心配はいりません。
これが私が持っているログ出力です:
2012-04-17 16:34:18,548 INFO [http-bio-8081-exec-97] c.c.e.EmailJobWorker [EmailJobWorker.java:98] EmailJobWorker test was created sucessfully. (batchSize, timeInterval, currentId, startTime) (1, 5, 1, 04/17/12 - 15:15)
2012-04-17 16:34:18,552 INFO [http-bio-8081-exec-97] c.c.e.EmailJobManager [EmailJobManager.java:297] Worker test has been added to pausedWorkers list with memory address (EmailJobWorker@7e7df7d)
2012-04-17 16:34:18,552 INFO [http-bio-8081-exec-97] c.c.e.EmailJobManager [EmailJobManager.java:301] EmailJob test loaded sucessfully.
2012-04-17 16:34:18,557 INFO [http-bio-8081-exec-97] c.c.e.EmailJobWorker [EmailJobWorker.java:98] EmailJobWorker test2 was created sucessfully. (batchSize, timeInterval, currentId, startTime) (1, 5, 1, 04/17/12 - 15:15)
2012-04-17 16:34:18,558 INFO [http-bio-8081-exec-97] c.c.e.EmailJobManager [EmailJobManager.java:297] Worker test2 has been added to pausedWorkers list with memory address (EmailJobWorker@349be26c)
2012-04-17 16:34:18,558 INFO [http-bio-8081-exec-97] c.c.e.EmailJobManager [EmailJobManager.java:301] EmailJob test2 loaded sucessfully.
2012-04-17 16:34:18,558 INFO [http-bio-8081-exec-97] c.c.e.EmailJobManager [EmailJobManager.java:117] EmailJobManager timer started sucesfully. (sleepTime) (1)
2012-04-17 16:34:18,559 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:74] EmailJobManager timer run started.
2012-04-17 16:34:18,561 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:85] Size of pausedWorkers: 2
2012-04-17 16:34:18,561 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:89] Memory Address in manager timer loop 2 for test (EmailJobWorker@7e7df7d)
2012-04-17 16:34:19,501 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:34:31,984 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:34:34,562 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:35:04,840 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:35:19,501 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:35:31,984 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:35:34,562 INFO [EmailJobManager] c.c.e.EmailJobManager [EmailJobManager.java:75] EmailJobManager timer run started.
2012-04-17 16:36:04,840 INFO [EmailJobManager] c.c.e.EmailJobManager
ご覧のとおり、EmailJobManager は 1 回しか作成されず、JobWorkers のタイマーがオフになることはありませんが、タイマーは 1 分ごとにオフになっているわけではありません。