| 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 == |
| |
| The following are Intents that can be sent for testing pruproses on |
| DEBUGGABLE builds (userdebug, eng) |
| |
| *) Causes bringUp and retry requests to fail for all DC's |
| |
| adb shell am broadcast -a com.android.internal.telephony.dataconnection.action_fail_bringup --ei counter 2 --ei fail_cause -3 |
| |
| *) 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 |
| |
| |
| == System properties for Testing == |
| |
| On debuggable builds (userdebug, eng) you can change additional |
| settings through system properties. These properties can be set with |
| "setprop" for the current boot, or added to local.prop to persist |
| across boots. |
| |
| device# setprop key value |
| |
| device# echo "key=value" >> /data/local.prop |
| device# chmod 644 /data/local.prop |
| |
| |
| -- Retry configuration -- |
| |
| You can replace the connection retry configuration. For example, you |
| could change it to perform 4 retries at 5 second intervals: |
| |
| device# setprop test.data_retry_config "5000,5000,5000" |
| |
| |
| -- Roaming -- |
| |
| You can force the telephony stack to always assume that it's roaming |
| to verify higher-level framework functionality: |
| |
| device# setprop telephony.test.forceRoaming true |
