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Avoid concurrent (un)registration 

With synchronized MutableLists
This commit is contained in:
sim 2023-09-05 21:50:17 +02:00
parent 08aca7b5bd
commit 006ecb894c
1 changed files with 57 additions and 34 deletions
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91
app/src/main/java/org/unifiedpush/distributor/nextpush/receivers/RegisterBroadcastReceiver.kt
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@ -27,9 +27,6 @@ import kotlin.concurrent.schedule
* THIS SERVICE IS USED BY OTHER APPS TO REGISTER
*/
private val createQueue = emptyList<String>().toMutableList()
private val delQueue = emptyList<String>().toMutableList()
private const val WAKE_LOCK_TAG = "NextPush:RegisterBroadcastReceiver:lock"
class RegisterBroadcastReceiver : BroadcastReceiver() {
@ -51,49 +48,53 @@ class RegisterBroadcastReceiver : BroadcastReceiver() {
Log.w(TAG, "Trying to register an app without packageName")
return
}
when (checkToken(context, connectorToken, application)) {
TOKEN_REGISTERED_OK -> sendEndpoint(context, connectorToken)
TOKEN_NOK -> sendRegistrationFailed(
context,
application,
connectorToken
)
TOKEN_NEW -> {
val appName = context.getApplicationName(application) ?: application
if (!isConnected(context)) {
if (!createQueue.containsTokenElseAdd(connectorToken)) {
when (checkToken(context, connectorToken, application)) {
TOKEN_REGISTERED_OK -> {
sendEndpoint(context, connectorToken)
createQueue.removeToken(connectorToken)
}
TOKEN_NOK -> {
sendRegistrationFailed(
context,
application,
connectorToken,
message = "NextPush is not connected"
connectorToken
)
Toast.makeText(
context,
"Cannot register $appName, NextPush is not connected.",
Toast.LENGTH_SHORT
).show()
return
createQueue.removeToken(connectorToken)
}
if (connectorToken !in createQueue) {
createQueue.add(connectorToken)
delayRemove(createQueue, connectorToken)
TOKEN_NEW -> {
val appName = context.getApplicationName(application) ?: application
if (!isConnected(context)) {
sendRegistrationFailed(
context,
application,
connectorToken,
message = "NextPush is not connected"
)
Toast.makeText(
context,
"Cannot register $appName, NextPush is not connected.",
Toast.LENGTH_SHORT
).show()
return
}
createApp(
context,
application,
connectorToken
) {
sendEndpoint(context, connectorToken)
createQueue.remove(connectorToken)
createQueue.removeToken(connectorToken)
Toast.makeText(
context,
"$appName registered.",
Toast.LENGTH_SHORT
).show()
}
} else {
Log.d(TAG, "Already registering this token")
}
}
} else {
Log.d(TAG, "Already registering this token")
}
}
ACTION_UNREGISTER -> {
@ -101,13 +102,11 @@ class RegisterBroadcastReceiver : BroadcastReceiver() {
val connectorToken = intent.getStringExtra(EXTRA_TOKEN) ?: ""
getDb(context).getPackageName(connectorToken) ?: return
if (connectorToken !in delQueue) {
delQueue.add(connectorToken)
delayRemove(delQueue, connectorToken)
if (!delQueue.containsTokenElseAdd(connectorToken)) {
try {
deleteApp(context, connectorToken) {
Log.d(TAG, "Unregistration is finished")
delQueue.remove(connectorToken)
delQueue.removeToken(connectorToken)
}
} catch (e: Exception) {
Log.d(TAG, "Could not delete app")
@ -124,9 +123,33 @@ class RegisterBroadcastReceiver : BroadcastReceiver() {
}
}
private fun delayRemove(list: MutableList<String>, token: String) {
Timer().schedule(1_000L /* 1sec */) {
list.remove(token)
private fun MutableList<String>.containsTokenElseAdd(connectorToken: String): Boolean {
return synchronized(this) {
if (connectorToken !in this) {
Log.d(TAG, "Token: $this")
this.add(connectorToken)
delayRemove(this, connectorToken)
false
} else {
true
}
}
}
private fun MutableList<String>.removeToken(connectorToken: String) {
synchronized(this) {
this.remove(connectorToken)
}
}
private fun delayRemove(list: MutableList<String>, token: String) {
Timer().schedule(1_000L /* 1sec */) {
list.removeToken(token)
}
}
companion object {
private val createQueue = emptyList<String>().toMutableList()
private val delQueue = emptyList<String>().toMutableList()
}
}