| This package contains classes used to manage a DataConnection. |
| |
| A criticial aspect of this class is that most objects in this |
| package run on the same thread except DataConnectionTracker |
| This makes processing efficient as it minimizes context |
| switching and it eliminates issues with multi-threading. |
| |
| This can be done because all actions are either asynchronous |
| or are known to be non-blocking and fast. At this time only |
| DcTesterDeactivateAll takes specific advantage of this |
| single threading knowledge by using Dcc#mDcListAll so be |
| very careful when making changes that break this assumption. |
| |
| A related change was in DataConnectionAc I added code that |
| checks to see if the caller is on a different thread. If |
| it is then the AsyncChannel#sendMessageSynchronously is |
| used. If the caller is on the same thread then a getter |
| is used. This allows the DCAC to be used from any thread |
| and was required to fix a bug when Dcc called |
| PhoneBase#notifyDataConnection which calls DCT#getLinkProperties |
| and DCT#getLinkCapabilities which call Dcc all on the same |
| thread. Without this change there was a dead lock when |
| sendMessageSynchronously blocks. |
| |
| |
| Testing: |
| |
| There are three Intents that can be sent for testing pruproses: |
| |
| The first two cause bringUp and retry requests to fail and the first |
| causes all DC's to fail the second causes a specific DC to fail: |
| |
| adb shell am broadcast -a com.android.internal.telephony.dataconnection.action_fail_bringup --ei counter 2 --ei fail_cause -3 |
| adb shell am broadcast -a com.android.internal.telephony.dataconnection.DC-1.action_fail_bringup --ei counter 2 --ei fail_cause -3 |
| |
| The other causes all DC's to get torn down, simulating a temporary network outage: |
| |
| adb shell am broadcast -a com.android.internal.telephony.dataconnection.action_deactivate_all |
| |
| To simplify testing we also have detach and attach simulations below where {x} is gsm, cdma or sip |
| |
| adb shell am broadcast -a com.android.internal.telephony.{x}.action_detached |
| adb shell am broadcast -a com.android.internal.telephony.{x}.action_attached |
| |
| |
| Additionally, you on DEGUGGABLE builds (userdebug, eng) you can replace the retry configuration |
| by setting the SystemProperty: test.data_retry_config for instance: |
| |
| adb shell setprop test.data_retry_config "5000,5000,5000" |
| |
| Which changes the retry to 3 retires at 5 second intervals. This can be added to |
| /data/local.prop, don't forget to "adb shell chmod 0600 /data/local.prop": |
| $ cat local.prop.test.data_retry_config |
| test.data_retry_config=5000,5000,5000,5000 |
| |
