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Introducing a couple of private variables in order to keep track of the subscription status

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This commit is contained in:
Nelson R. Perez 2017-07-03 20:05:59 -05:00
parent ec19b62ba7
commit 50fc2d805e
1 changed files with 21 additions and 0 deletions
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21
graphenej/src/main/java/de/bitsharesmunich/graphenej/api/SubscriptionMessagesHub.java
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@ -61,6 +61,10 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
private int subscriptionCounter = 0;
private HashMap<Long, BaseGrapheneHandler> mHandlerMap = new HashMap<>();
// State variables
private boolean isUnsubscribing;
private boolean isSubscribed;
/**
* Constructor used to create a subscription message hub that will call the set_subscribe_callback
* API with the clear_filter parameter set to false, meaning that it will only receive automatic updates
@ -147,6 +151,10 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
} else if(currentId == SUBSCRIPTION_REQUEST){
List<SubscriptionListener> subscriptionListeners = mSubscriptionDeserializer.getSubscriptionListeners();
if(!isUnsubscribing){
isSubscribed = true;
}
// If we haven't subscribed to all requested subscription channels yet,
// just send one more subscription
if(subscriptionListeners != null &&
@ -192,6 +200,8 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
* Private method that sends a subscription request to the full node
*/
private void subscribe(){
isUnsubscribing = false;
ArrayList<Serializable> subscriptionParams = new ArrayList<>();
subscriptionParams.add(String.format("%d", SUBSCRIPTION_NOTIFICATION));
subscriptionParams.add(clearFilter);
@ -220,6 +230,9 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
* de-registers all subscription and request listeners.
*/
public void cancelSubscriptions(){
isSubscribed = false;
isUnsubscribing = true;
ApiCall unsubscribe = new ApiCall(databaseApiId, RPC.CALL_CANCEL_ALL_SUBSCRIPTIONS, new ArrayList<Serializable>(), RPC.VERSION, SUBSCRIPTION_REQUEST);
mWebsocket.sendText(unsubscribe.toJsonString());
@ -230,6 +243,14 @@ public class SubscriptionMessagesHub extends BaseGrapheneHandler implements Subs
mHandlerMap.clear();
}
/**
* Method used to check the current state of the connection.
* @return: True if the websocket is open and there is an active subscription, false otherwise.
*/
public boolean isSubscribed(){
return this.mWebsocket.isOpen() && isSubscribed;
}
/**
* Method used to reset all internal variables.
*/