Hello
For those of you interested in GC here is a class I have in a B4J server:
Regards
John.
EDIT: Please note that in this example the frequency is set to 1 minute, this is just to allow you see the memory metrics. I don't recommend that you use this frequency in a production environment.
For those of you interested in GC here is a class I have in a B4J server:
B4X:
Sub Class_Globals
Private tmrHook As Timer
Private gcTime As Long
Private freq_gc As Int = 1
End Sub
Public Sub Initialize
' // 3 seconds
tmrHook.Initialize("tmrHook", 3000)
tmrHook.Enabled = True
threadName = getcurrentThreadName
' // set the initial GC time
gcTime =DateTime.Now + (DateTime.TicksPerMinute * freq_gc)
writelog("Background Hello Helper Thread Started, GC Frequency Check Every " & freq_gc & " Minutes" )
StartMessageLoop '<- don't forget!
End Sub
Sub tmrHook_Tick
' // do GC
If gcTime < DateTime.Now Then
process_gc
' // set next time
gcTime =DateTime.Now + (DateTime.TicksPerMinute * freq_gc)
End If
End Sub
Sub process_gc
Dim jo As JavaObject = Me
log("Total designated memory " & jo.RunMethod("getTotal",Null))
log("Before GC, Java heap currently used by instantiated objects " & jo.RunMethod("getUsed",Null))
log("Before GC, Current allocated free memory " & jo.RunMethod("getAllocatedFree",Null))
jo.RunMethod("do_garbage_collection",Null)
log("After GC, Current allocated free memory " & jo.RunMethod("getAllocatedFree",Null))
log("After GC, Java heap currently used by instantiated objects " & jo.RunMethod("getUsed",Null))
End Sub
Sub getcurrentThreadName As String
Dim t As JavaObject
Return t.InitializeStatic("java.lang.Thread").RunMethodJO("currentThread", Null).RunMethod("getName", Null)
End Sub
#if java
import java.util.*;
public void do_garbage_collection() {
Runtime rs = Runtime.getRuntime();
rs.gc();
}
public long getAllocatedFree() {
Runtime rs = Runtime.getRuntime();
return rs.freeMemory();
}
public long getAllocatedTotal() {
Runtime rs = Runtime.getRuntime();
return rs.totalMemory();
}
public long getUsed() {
Runtime rs = Runtime.getRuntime();
return rs.totalMemory() - rs.freeMemory();
}
public long getTotal() {
Runtime rs = Runtime.getRuntime();
return rs.maxMemory();
}
#End IfRegards
John.
EDIT: Please note that in this example the frequency is set to 1 minute, this is just to allow you see the memory metrics. I don't recommend that you use this frequency in a production environment.
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