Problem with Global Variables Process (BUG or my mistake?)

edgar_ortiz · Feb 23, 2013

I have an application that among other things (which work perfectly)
I need a service that runs every three minutes, perform its function (originally was to obtain GPS data). Within a range of hours (eg 8 to 20 hours).
So many problems encountered I decided to make a small program to test the use of services.

Of course I read and read http://www.b4x.com/forum/basic4andr...-process-activities-life-cycle.html#post37980

Process variables - These variables live as long as the process lives.
You should declare these variables inside sub Process_Globals.
This sub is called once when the process starts (this is true for all activities, not just the first activity).
These variables are the only "public" variables. Which means that they can be accessed from other modules as well.
However, not all types of objects can be declared as process variables.

And I found loss values Global Process Variables.

HTML:

LogCat connected to: B4A-Bridge: samsung GT-S5830M-359971046757729
--------- beginning of /dev/log/system
--------- beginning of /dev/log/main
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
** Service (service1) Create **
** Service (service1) Start **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
Connected to B4A-Bridge (Bluetooth)
Installing file.
PackageAdded: package:test.service
** Activity (main) Create, isFirst = true **
Main - FirstTime
Main.FirstTime -- Database file copied
2013-02-23 10:37:41 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Main.FirstTime','2013-02-23 10:37:41', 'First Time of the Program')
First start of the service
** Activity (main) Resume **
Main.Resume
** Activity (main) Pause, UserClosed = true **
Main.Pause
** Service (work) Create **
2013-02-23 10:37:41 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:37:41', 'Service_Create')
** Service (work) Start **
2013-02-23 10:37:41 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:37:41', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:40:42
2013-02-23 10:37:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:37:42', 'Next Schedule : 2013-02-23 10:40:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:37:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:37:42', 'Service_Destroy')
** Activity (showdata) Create, isFirst = true **
** Activity (showdata) Resume **
** Activity (showdata) Pause, UserClosed = false **
** Service (work) Create **
2013-02-23 10:40:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:40:42', 'Service_Create')
** Service (work) Start **
2013-02-23 10:40:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:40:42', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:43:42
2013-02-23 10:40:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:40:42', 'Next Schedule : 2013-02-23 10:43:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:40:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:40:42', 'Service_Destroy')
** Service (work) Create **
2013-02-23 10:43:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:43:42', 'Service_Create')
** Service (work) Start **
2013-02-23 10:43:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:43:42', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:46:42
2013-02-23 10:43:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:43:42', 'Next Schedule : 2013-02-23 10:46:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:43:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:43:42', 'Service_Destroy')
** Service (work) Create **
2013-02-23 10:46:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:46:42', 'Service_Create')
** Service (work) Start **
2013-02-23 10:46:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:46:42', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:49:42
2013-02-23 10:46:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:46:42', 'Next Schedule : 2013-02-23 10:49:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:46:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:46:42', 'Service_Destroy')
** Service (work) Create **
2013-02-23 10:49:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:49:42', 'Service_Create')
** Service (work) Start **
2013-02-23 10:49:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:49:42', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:52:42
2013-02-23 10:49:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:49:42', 'Next Schedule : 2013-02-23 10:52:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:49:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:49:42', 'Service_Destroy')
** Service (work) Create **
2013-02-23 10:52:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:52:42', 'Service_Create')
** Service (work) Start **
2013-02-23 10:52:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:52:42', 'Service_Start')
Partial wakeLock already held.
Next Schedule : 2013-02-23 10:55:42
2013-02-23 10:52:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:52:42', 'Next Schedule : 2013-02-23 10:55:42')
Service.Work.Check_Running_Programs --- Begin
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **
2013-02-23 10:52:42 Before of write in the database: INSERT INTO sg_t_log (programa, fecha_hora, info) values ('Service.Work','2013-02-23 10:52:42', 'Service_Destroy')
** Service (work) Create **
** Service (work) Start **
Service.Work.Check_Running_Programs --- Begin
INSERT INTO sg_t_data (fecha_hora, info) values (2013-02-23 10:55:42, USER     PID   PPID  VSIZE  RSS     WCHAN    PC         NAME
root      1     0     372    224   ffffffff 00000000 S /init
root      2     0     0      0     ffffffff 00000000 S kthreadd
root      3     2     0      0     ffffffff 00000000 S ksoftirqd/0
root      4     2     0      0     ffffffff 00000000 S watchdog/0
root      5     2     0      0     ffffffff 00000000 S events/0
root      6     2     0      0     ffffffff 00000000 S khelper
root      9     2     0      0     ffffffff 00000000 S async/mgr
root      12    2     0      0     ffffffff 00000000 S suspend
root      226   2     0      0     ffffffff 00000000 S sync_supers
root      228   2     0      0     ffffffff 00000000 S bdi-default
root      230   2     0      0     ffffffff 00000000 S kblockd/0
root      237   2     0      0     ffffffff 00000000 S pmu_events/0
root      257   2     0      0     ffffffff 00000000 S kseriod
root      272   2     0      0     ffffffff 00000000 S kmmcd
root      278   2     0      0     ffffffff 00000000 S DevOutput_wq/0
root      381   2     0      0     ffffffff 00000000 S khungtaskd
root      382   2     0      0     ffffffff 00000000 D kswapd0
root      384   2     0      0     ffffffff 00000000 S aio/0
root      385   2     0      0     ffffffff 00000000 S crypto/0
root      404   2     0      0     ffffffff 00000000 S lcd_wq/0
root      407   2     0      0     ffffffff 00000000 S CSL_LCDC/0
root      411   2     0      0     ffffffff 00000000 S lcd_periodic_re
root      610   2     0      0     ffffffff 00000000 S taos_wq
root      611   2     0      0     ffffffff 00000000 S prox_wq
root      638   2     0      0     ffffffff 00000000 S charing_current
root      643   2     0      0     ffffffff 00000000 S rx_ether_queue
root      650   2     0      0     ffffffff 00000000 S usb_mass_storag
root      668   2     0      0     ffffffff 00000000 S check_ic_wq/0
root      675   2     0      0     ffffffff 00000000 S irq/126-melfas-
root      699   2     0      0     ffffffff 00000000 S kstriped
root      718   2     0      0     ffffffff 00000000 S binder
root      729   2     0      0     ffffffff 00000000 S ipc-wq/0
root      734   2     0      0     ffffffff 00000000 S cmd_wq/0
root      735   2     0      0     ffffffff 00000000 S rsp_wq/0
root      736   2     0      0     ffffffff 00000000 S notify_wq/0
root      751   2     0      0     ffffffff 00000000 S cmd_wq/0
root      752   2     0      0     ffffffff 00000000 S rsp_wq/0
root      753   2     0      0     ffffffff 00000000 S notify_wq/0
root      759   2     0      0     ffffffff 00000000 S v3d_thread
root      766   2     0      0     ffffffff 00000000 S AudioCtrlWq/0
root      794   1     304    148   ffffffff 00000000 S /sbin/ueventd
root      1058  2     0      0     ffffffff 00000000 S mmcqd
root      1316  1     416    260   ffffffff 00000000 S /init
system    1318  1316  848    284   ffffffff 00000000 S /system/bin/servicemanager
media     1319  1316  8008   1088  ffffffff 00000000 S /system/bin/playsound
root      1320  1316  3916   440   ffffffff 00000000 S /system/bin/vold
root      1321  1316  4244   576   ffffffff 00000000 S /system/bin/netd
root      1322  1316  712    260   ffffffff 00000000 S /system/bin/debuggerd
radio     1323  1316  9276   992   ffffffff 00000000 S /system/bin/rild
system    1324  1316  1056   312   ffffffff 00000000 S /system/bin/npsmobex
root      1325  1316  123908 15224 ffffffff 00000000 S zygote
media     1326  1316  38704  3380  ffffffff 00000000 S /system/bin/mediaserver
system    1327  1316  14032  1004  ffffffff 00000000 S /system/bin/mtvmfservice
bluetooth 1328  1316  1328   600   ffffffff 00000000 S /system/bin/dbus-daemon
root      1329  1316  864    364   ffffffff 00000000 S /system/bin/installd
keystore  1330  1316  1788   292   ffffffff 00000000 S /system/bin/keystore
compass   1331  1316  2896   320   ffffffff 00000000 S /system/bin/orientationd
compass   1332  1316  860    312   ffffffff 00000000 S /system/bin
Work.Check_Running_Programs --- Database is NOT open
Service.Work.Check_Running_Programs --- End
** Service (work) Destroy **

it can be seen that there is NO quotation marks in the LAST insert.
Besides the database is closed.

Any help is welcome

Regards,

Edgar

melamoud · Feb 23, 2013

be more specific

what var you are losing ?
do you have a proble, (not related) with the insert ?

without looking at the code, it seems that the process goes down (activity ends and service ends (then the service will start using probably startserviceAt - but that will not keep the process a live so if android decide to close it (see logs it is) then you do not hav your proces vars

you can either put service to foregroud and use timer (so it never goes down)
or put those vars in the DB and load them on service create to keep them alive

nir

edgar_ortiz · Feb 24, 2013

melamoud said:
what var you are losing ?

nir

Hi, Thanks for your time... the variables lost are the defined in Process_Globals.

Regards

Edgar

wheretheidivides · Feb 24, 2013

before someone says this, there is a forem for bugs and wishes that this should be in. Now, I too have a thread there mentioning issues with variables.

Erel · Feb 24, 2013

As Melamoud wrote the process can be killed and recreated. This happens when there is no visible activity (and you didn't call Service.Startforeground). It may not happen immediately or may not happen at all. When that happens the process variables are recreated.

You should always save settings and other important data in a file and load them in Service_Create.

Problem with Global Variables Process (BUG or my mistake?)

edgar_ortiz

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melamoud

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edgar_ortiz

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wheretheidivides

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Erel

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