[question] persistance how ? how can hangfire backgrund jobs/tasks survive against application restart shutdown ?

[blackholeearth]

i read that hangfire tasks/jobs can survive agains application restart/shutdowns ? it says that for persistance , hangfire uses mssql , sqllite , litedb , postgresql, or your-fav-db.

im more interested in this: how can hangfire convert my task (c# code block, ) into string . is it possible in c# ?? or did i misunderstood ?

[morrislaw715]

In my project, I keep the jobid, jobtype and cron express in database as a config. Then call back the job from database. Everything work fine after restart.

using (SqlConnection conn = new(strConstr))

{
    conn.Open();
    using (SqlCommand cmd = new("HangFire.RecurringJob", conn))
    {
        cmd.CommandType = CommandType.StoredProcedure;
        using (SqlDataReader dr = cmd.ExecuteReader())
        {
            while (dr.Read())
            {
                string? jobid = dr["jobid"].ToString();
                string? cron = dr["Cron"].ToString();
                RecurringJob.AddOrUpdate(jobid, () => JobType.AutoMail(jobid), cron, TimeZoneInfo.Local);

            };
        };
    };
    conn.Close();

};

[blackholeearth]

Ok. So you are not converting actual piece of code. I'm Relieved.

just the job id. Thanks.