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handle subscribe when messages mixer is not available

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Brad Hefta-Gaub 2015-11-17 14:28:51 -08:00
parent 6dfcc53c27
commit 85aa3b3f83
4 changed files with 33 additions and 48 deletions
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40
examples/example/messagesExample.js
View file

@ -12,29 +12,25 @@ Script.update.connect(function (deltaTime) {
subscribedForTime += deltaTime;
}
if (totalTime > 5) {
// if we've been unsubscribed for SWITCH_SUBSCRIPTION_TIME seconds, subscribe
if (!subscribed && unsubscribedForTime > SWITCH_SUBSCRIPTION_TIME) {
print("---- subscribing ----");
Messages.subscribe(channel);
subscribed = true;
subscribedForTime = 0;
}
// if we've been subscribed for SWITCH_SUBSCRIPTION_TIME seconds, unsubscribe
if (subscribed && subscribedForTime > SWITCH_SUBSCRIPTION_TIME) {
print("---- unsubscribing ----");
Messages.unsubscribe(channel);
subscribed = false;
unsubscribedForTime = 0;
}
// Even if not subscribed, still publish
var message = "update() deltaTime:" + deltaTime;
//print(message);
Messages.sendMessage(channel, message);
// if we've been unsubscribed for SWITCH_SUBSCRIPTION_TIME seconds, subscribe
if (!subscribed && unsubscribedForTime > SWITCH_SUBSCRIPTION_TIME) {
print("---- subscribing ----");
Messages.subscribe(channel);
subscribed = true;
subscribedForTime = 0;
}
// if we've been subscribed for SWITCH_SUBSCRIPTION_TIME seconds, unsubscribe
if (subscribed && subscribedForTime > SWITCH_SUBSCRIPTION_TIME) {
print("---- unsubscribing ----");
Messages.unsubscribe(channel);
subscribed = false;
unsubscribedForTime = 0;
}
// Even if not subscribed, still publish
var message = "update() deltaTime:" + deltaTime;
Messages.sendMessage(channel, message);
});

20
examples/example/messagesReceiverExample.js
View file

@ -1,21 +1,7 @@
var totalTime = 0;
var subscribed = false;
var WAIT_FOR_SUBSCRIPTION_TIME = 10;
function myUpdate(deltaTime) {
var channel = "example";
totalTime += deltaTime;
if (totalTime > WAIT_FOR_SUBSCRIPTION_TIME && !subscribed) {
print("---- subscribing ----");
Messages.subscribe(channel);
subscribed = true;
Script.update.disconnect(myUpdate);
}
}
Script.update.connect(myUpdate);
print("---- subscribing ----");
Messages.subscribe(channel);
Messages.messageReceived.connect(function (channel, message, senderID) {
print("message received on channel:" + channel + ", message:" + message + ", senderID:" + senderID);
});

16
libraries/networking/src/MessagesClient.cpp
View file

@ -27,7 +27,7 @@ MessagesClient::MessagesClient() {
auto nodeList = DependencyManager::get<NodeList>();
auto& packetReceiver = nodeList->getPacketReceiver();
packetReceiver.registerMessageListener(PacketType::MessagesData, this, "handleMessagesPacket");
connect(nodeList.data(), &LimitedNodeList::nodeKilled, this, &MessagesClient::handleNodeKilled);
connect(nodeList.data(), &LimitedNodeList::nodeAdded, this, &MessagesClient::handleNodeAdded);
}
void MessagesClient::init() {
@ -75,10 +75,8 @@ void MessagesClient::sendMessage(const QString& channel, const QString& message)
}
}
// FIXME - we should keep track of the channels we are subscribed to locally, and
// in the event that they mixer goes away and/or comes back we should automatically
// resubscribe to those channels
void MessagesClient::subscribe(const QString& channel) {
_subscribedChannels << channel;
auto nodeList = DependencyManager::get<NodeList>();
SharedNodePointer messagesMixer = nodeList->soloNodeOfType(NodeType::MessagesMixer);
@ -90,6 +88,7 @@ void MessagesClient::subscribe(const QString& channel) {
}
void MessagesClient::unsubscribe(const QString& channel) {
_subscribedChannels.remove(channel);
auto nodeList = DependencyManager::get<NodeList>();
SharedNodePointer messagesMixer = nodeList->soloNodeOfType(NodeType::MessagesMixer);
@ -100,9 +99,10 @@ void MessagesClient::unsubscribe(const QString& channel) {
}
}
void MessagesClient::handleNodeKilled(SharedNodePointer node) {
if (node->getType() != NodeType::MessagesMixer) {
return;
void MessagesClient::handleNodeAdded(SharedNodePointer node) {
if (node->getType() == NodeType::MessagesMixer) {
for (const auto& channel : _subscribedChannels) {
subscribe(channel);
}
}
// FIXME - do we need to do any special bookkeeping for when the messages mixer is no longer available
}

5
libraries/networking/src/MessagesClient.h
View file

@ -37,7 +37,10 @@ signals:
private slots:
void handleMessagesPacket(QSharedPointer<NLPacketList> packetList, SharedNodePointer senderNode);
void handleNodeKilled(SharedNodePointer node);
void handleNodeAdded(SharedNodePointer node);
protected:
QSet<QString> _subscribedChannels;
};
#endif