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Code Issues Releases Activity

AndroidGCS Telemetry: Sending an update could interrupt a pending transaction

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We allow sending objects that don't create a transaction while waiting for one
to complete.  However, this was overriding the pending transaction information
(when there wasn't a new transaction) and masking the transaction completed
message.

Note: I think this logical error can occur on the GCS side and might explain the
"transaction completed when not expected" messages.
This commit is contained in:
James Cotton 2012-10-16 11:59:06 -05:00
parent 5c55dc07b0
commit b0522a319f
1 changed files with 17 additions and 13 deletions
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30
androidgcs/src/org/openpilot/uavtalk/Telemetry.java
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@ -638,11 +638,7 @@ public class Telemetry {
return;
}
// Store this as the active transaction
transPending = newTransactionPending;
transInfo = newTrans;
if (DEBUG) Log.d(TAG, "Process Object transaction for " + transInfo.obj.getName());
if (DEBUG) Log.d(TAG, "Process Object transaction for " + newTrans.obj.getName());
// Remove this one from the list of pending transactions
handler.removeActivatedQueue(objInfo);
@ -650,12 +646,12 @@ public class Telemetry {
try {
// 3. Execute transaction by sending the appropriate UAVTalk command
if (transInfo.objRequest) {
if (DEBUG) Log.d(TAG, "Sending object request " + transInfo.obj.getName());
utalk.sendObjectRequest(transInfo.obj, transInfo.allInstances);
if (newTrans.objRequest) {
if (DEBUG) Log.d(TAG, "Sending object request " + newTrans.obj.getName());
utalk.sendObjectRequest(newTrans.obj, newTrans.allInstances);
} else {
if (DEBUG) Log.d(TAG, "Sending object " + transInfo.obj.getName());
utalk.sendObject(transInfo.obj, transInfo.acked, transInfo.allInstances);
if (DEBUG) Log.d(TAG, "Sending object " + newTrans.obj.getName());
utalk.sendObject(newTrans.obj, newTrans.acked, newTrans.allInstances);
}
} catch (IOException e) {
@ -663,9 +659,17 @@ public class Telemetry {
e.printStackTrace();
}
// Post a timeout timer if a response is epxected
if (transPending)
// Store this as the active transaction. However in the case
// of transPending && !newTransactionPending we need ot not
// override the previous pending transaction
if (!transPending && newTransactionPending) {
transPending = newTransactionPending;
transInfo = newTrans;
// Post a timeout timer if a response is epxected
handler.postDelayed(transactionTimeout, REQ_TIMEOUT_MS);
}
}
}
}
@ -750,7 +754,7 @@ public class Telemetry {
//Send signal
obj.transactionCompleted(result);
} else {
if (ERROR) Log.e(TAG, "Error: received a transaction completed when did not expect it.");
if (ERROR) Log.e(TAG, "Error: received a transaction completed when did not expect it. " + obj.getName());
transPending = false;
}
}