public void UpdateLeaders(Object state)
{
foreach (Leader leader in leaders)
{
TimeSpan elapsed = DateTime.Now - leader.LastUpdated;
if (elapsed.TotalSeconds < maxDelayinSeconds)
{
continue;
}
// update leader value in the leader db
try
{
using (SyncMonDB db = new SyncMonDB(dbCxnMap[leader.Name]))
{
//if the leader value doesn't exist, insert, otherwise, update
SyncAgent row = (from r in db.SyncAgents where r.Name == leader.Name select r).SingleOrDefault();
if (row == null)
{
row = new SyncAgent();
row.Name = leader.Name;
row.Value = (new Random()).Next(0, 1000);
row.LastUpdated = DateTime.Now;
db.SyncAgents.Add(row);
}
else
{
row.Value = (new Random()).Next(0, 1000);
row.LastUpdated = DateTime.Now;
}
db.SaveChanges();
}
} catch (Exception e)
{
Trace.TraceError("Failed to update leader {0}. {1}", leader.Name, e.Message);
}
}
}
public void UpdateLeaders(Object state)
{
foreach (Leader leader in leaders)
{
TimeSpan elapsed = DateTime.Now - leader.LastUpdated;
if (elapsed.TotalSeconds < maxDelayinSeconds) continue;
// update leader value in the leader db
try
{
using (SyncMonDB db = new SyncMonDB(dbCxnMap[leader.Name]))
{
//if the leader value doesn't exist, insert, otherwise, update
SyncAgent row = (from r in db.SyncAgents where r.Name == leader.Name select r).SingleOrDefault();
if (row == null)
{
row = new SyncAgent();
row.Name = leader.Name;
row.Value = (new Random()).Next(0, 1000);
row.LastUpdated = DateTime.Now;
db.SyncAgents.Add(row);
}
else
{
row.Value = (new Random()).Next(0, 1000);
row.LastUpdated = DateTime.Now;
}
db.SaveChanges();
}
} catch (Exception e)
{
Trace.TraceError("Failed to update leader {0}. {1}", leader.Name, e.Message);
}
}
}
private void QueryState(Object state)
{
//get the Sync table from each DB
Dictionary<string, Dictionary<string, SyncAgent>> syncTables = new Dictionary<string,Dictionary<string, SyncAgent>>();
foreach (string key in dbCxnMap.Keys)
{
try
{
using (SyncMonDB db = new SyncMonDB(dbCxnMap[key]))
{
Dictionary<string, SyncAgent> rows = new Dictionary<string, SyncAgent>();
IEnumerable<SyncAgent> query = (from r in db.SyncAgents select r);
foreach (SyncAgent row in query)
{
rows[row.Name] = row;
}
syncTables[key] = rows;
}
} catch (Exception e)
{
Trace.TraceError("failed to access db {0}: {1}", key, e.Message);
syncTables[key] = null;
}
}
//update the state in memory
foreach (Leader leader in leaders)
{
// find leader's db
Dictionary<string, SyncAgent> rows = syncTables[leader.Name];
if (rows == null) continue; //can't connect to leader's db
// find leader's value in leader's db
leader.Value = rows[leader.Name].Value;
leader.LastUpdated = rows[leader.Name].LastUpdated;
leader.LastUpdatedStr = leader.LastUpdated.ToString("g");
foreach(Follower follower in leader.Followers)
{
// find follower's db
Dictionary<string, SyncAgent> flrows = syncTables[follower.Name];
if (flrows == null) continue; //can't connect to follower's db
follower.Status = StatusCode[2]; //default is out-of-date
if (!flrows.ContainsKey(leader.Name)) continue; //follower doesn't have leader info yet
// find leader's value in follower's db
follower.Value = flrows[leader.Name].Value;
follower.LastUpdated = flrows[leader.Name].LastUpdated;
follower.LastUpdatedStr = follower.LastUpdated.ToString("g");
follower.SyncDelayed = leader.LastUpdated - follower.LastUpdated;
follower.SyncDelayedStr = follower.SyncDelayed.ToString(@"dd\.hh\:mm\:ss") + " days";
if (follower.Value == leader.Value)
follower.Status = StatusCode[0];
else if (follower.SyncDelayed.TotalSeconds < maxDelayinSeconds)
follower.Status = StatusCode[1];
}
};
DumpState();
}
private void QueryState(Object state)
{
//get the Sync table from each DB
Dictionary <string, Dictionary <string, SyncAgent> > syncTables = new Dictionary <string, Dictionary <string, SyncAgent> >();
foreach (string key in dbCxnMap.Keys)
{
try
{
using (SyncMonDB db = new SyncMonDB(dbCxnMap[key]))
{
Dictionary <string, SyncAgent> rows = new Dictionary <string, SyncAgent>();
IEnumerable <SyncAgent> query = (from r in db.SyncAgents select r);
foreach (SyncAgent row in query)
{
rows[row.Name] = row;
}
syncTables[key] = rows;
}
} catch (Exception e)
{
Trace.TraceError("failed to access db {0}: {1}", key, e.Message);
syncTables[key] = null;
}
}
//update the state in memory
foreach (Leader leader in leaders)
{
// find leader's db
Dictionary <string, SyncAgent> rows = syncTables[leader.Name];
if (rows == null)
{
continue; //can't connect to leader's db
}
// find leader's value in leader's db
leader.Value = rows[leader.Name].Value;
leader.LastUpdated = rows[leader.Name].LastUpdated;
leader.LastUpdatedStr = leader.LastUpdated.ToString("g");
foreach (Follower follower in leader.Followers)
{
// find follower's db
Dictionary <string, SyncAgent> flrows = syncTables[follower.Name];
if (flrows == null)
{
continue; //can't connect to follower's db
}
follower.Status = StatusCode[2]; //default is out-of-date
if (!flrows.ContainsKey(leader.Name))
{
continue; //follower doesn't have leader info yet
}
// find leader's value in follower's db
follower.Value = flrows[leader.Name].Value;
follower.LastUpdated = flrows[leader.Name].LastUpdated;
follower.LastUpdatedStr = follower.LastUpdated.ToString("g");
follower.SyncDelayed = leader.LastUpdated - follower.LastUpdated;
follower.SyncDelayedStr = follower.SyncDelayed.ToString(@"dd\.hh\:mm\:ss") + " days";
if (follower.Value == leader.Value)
{
follower.Status = StatusCode[0];
}
else if (follower.SyncDelayed.TotalSeconds < maxDelayinSeconds)
{
follower.Status = StatusCode[1];
}
}
}
;
DumpState();
}
