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realm-js
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Merge pull request #100 from realm/al-notification 

improve notification api
This commit is contained in:
Ari Lazier 2015-10-27 07:56:37 -07:00
parent 6db449ef06 a1c4cd5702
commit 8e1eb661c5
7 changed files with 162 additions and 114 deletions
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1
lib/constants.js
View File

@ -15,7 +15,6 @@ let propTypes = {};
[
'FUNCTION',
'NOTIFICATION',
'REALM',
'RESULTS',
].forEach(function(type) {

21
lib/notifications.js
View File

@ -1,21 +0,0 @@
'use strict';
const constants = require('./constants');
const {keys} = constants;
module.exports = {
create,
};
class Notification {}
function create(realmId, info) {
let notification = new Notification();
notification[keys.realm] = realmId;
notification[keys.id] = info.id;
notification[keys.type] = info.type;
return notification;
}

43
lib/realm.js
View File

@ -3,21 +3,18 @@
const constants = require('./constants');
const lists = require('./lists');
const objects = require('./objects');
const notifications = require('./notifications');
const results = require('./results');
const rpc = require('./rpc');
const util = require('./util');
const {keys, propTypes, objectTypes} = constants;
const notificationsKey = Symbol();
const notificationCallbackKey = Symbol();
const listenersKey = Symbol();
const resultsKey = Symbol();
// TODO: DATA
rpc.registerTypeConverter(propTypes.DATE, (_, info) => new Date(info.value));
rpc.registerTypeConverter(propTypes.LIST, lists.create);
rpc.registerTypeConverter(propTypes.OBJECT, objects.create);
rpc.registerTypeConverter(objectTypes.NOTIFICATION, notifications.create);
rpc.registerTypeConverter(objectTypes.RESULTS, results.create);
class Realm {
@ -42,7 +39,7 @@ class Realm {
this[keys.id] = realmId;
this[keys.realm] = realmId;
this[keys.type] = objectTypes.REALM;
this[notificationsKey] = [];
this[listenersKey] = [];
this[resultsKey] = [];
[
@ -53,18 +50,35 @@ class Realm {
});
}
addNotification(callback) {
addListener(name, callback) {
if (typeof callback != 'function') {
throw new Error('Realm.addNotification must be passed a function!');
throw new Error('Realm.addListener must be passed a function!');
}
if (name != 'change') {
throw new Error("Only 'change' notification is supported.");
}
this[listenersKey].push(callback);
}
let method = util.createMethod(objectTypes.REALM, 'addNotification');
let notification = method.apply(this, arguments);
notification[notificationCallbackKey] = callback;
removeListener(name, callback) {
if (typeof callback != 'function') {
throw new Error('Realm.addListener must be passed a function!');
}
if (name != 'change') {
throw new Error("Only 'change' notification is supported.");
}
var index = 0;
while((index = this[listenersKey].indexOf(callback, index)) != -1) {
this[listenersKey].splice(index, 1);
};
}
this[notificationsKey].push(notification);
return notification;
removeAllListeners(name) {
if (name != undefined && name != 'change') {
throw new Error("Only 'change' notification is supported.");
}
this[listenersKey] = [];
}
objects() {
@ -100,9 +114,8 @@ class Realm {
results[keys.resize]();
}
for (let notification of this[notificationsKey]) {
let callback = notification[notificationCallbackKey];
callback(this, 'DidChangeNotification');
for (let callback of this[listenersKey]) {
callback(this, 'change');
}
}
}

1
src/RJSRealm.hpp
View File

@ -26,7 +26,6 @@ namespace realm {
JSClassRef RJSRealmClass();
JSClassRef RJSRealmConstructorClass();
JSClassRef RJSNotificationClass();
std::string RJSDefaultPath();
void RJSSetDefaultPath(std::string path);

166
src/RJSRealm.mm
View File

@ -32,43 +32,25 @@ using namespace realm;
class RJSRealmDelegate : public RealmDelegate {
public:
typedef std::shared_ptr<std::function<void(const std::string)>> NotificationFunction;
void add_notification(NotificationFunction &notification) { m_notifications.insert(notification); }
void remove_notification(NotificationFunction notification) { m_notifications.erase(notification); }
void remove_all_notifications() { m_notifications.clear(); }
std::set<NotificationFunction> m_notifications;
virtual void changes_available() {
for (NotificationFunction notification : m_notifications) {
(*notification)("RefreshRequiredNotification");
assert(0);
}
virtual void did_change(std::vector<ObserverState> const& observers, std::vector<void*> const& invalidated) {
notify("change");
}
virtual void did_change(std::vector<ObserverState> const& observers,
std::vector<void*> const& invalidated) {
for (NotificationFunction notification : m_notifications) {
(*notification)("DidChangeNotification");
}
}
virtual std::vector<ObserverState> get_observed_rows() {
return std::vector<ObserverState>();
}
virtual void will_change(std::vector<ObserverState> const& observers,
std::vector<void*> const& invalidated) {
std::vector<void*> const& invalidated) {}
}
JSGlobalContextRef m_context;
std::map<std::string, ObjectDefaults> m_defaults;
std::map<std::string, JSValueRef> m_prototypes;
RJSRealmDelegate(JSGlobalContextRef ctx) : m_context(ctx) {
RJSRealmDelegate(WeakRealm realm, JSGlobalContextRef ctx) : m_context(ctx), m_realm(realm) {
JSGlobalContextRetain(m_context);
}
~RJSRealmDelegate() {
remove_all_notifications();
for (auto prototype : m_prototypes) {
JSValueUnprotect(m_context, prototype.second);
}
@ -79,6 +61,48 @@ public:
}
JSGlobalContextRelease(m_context);
}
void add_notification(JSObjectRef notification) {
JSValueProtect(m_context, notification);
m_notifications.insert(notification);
}
void remove_notification(JSObjectRef notification) {
JSValueUnprotect(m_context, notification);
m_notifications.erase(notification);
}
void remove_all_notifications() {
for (auto notification : m_notifications) {
JSValueUnprotect(m_context, notification);
}
m_notifications.clear();
}
std::map<std::string, ObjectDefaults> m_defaults;
std::map<std::string, JSValueRef> m_prototypes;
private:
std::set<JSObjectRef> m_notifications;
JSGlobalContextRef m_context;
WeakRealm m_realm;
void notify(const char *notification_name) {
JSValueRef arguments[2];
SharedRealm realm = m_realm.lock();
if (!realm) {
throw std::runtime_error("Realm no longer exists");
}
JSObjectRef realm_object = RJSWrapObject<SharedRealm *>(m_context, RJSRealmClass(), new SharedRealm(realm));
arguments[0] = realm_object;
arguments[1] = RJSValueForString(m_context, notification_name);
for (auto callback : m_notifications) {
JSValueRef ex = NULL;
JSObjectCallAsFunction(m_context, callback, realm_object, 2, arguments, &ex);
if (ex) {
throw RJSException(m_context, ex);
}
}
}
};
std::map<std::string, ObjectDefaults> &RJSDefaults(Realm *realm) {
@ -189,7 +213,7 @@ JSObjectRef RealmConstructor(JSContextRef ctx, JSObjectRef constructor, size_t a
}
SharedRealm realm = Realm::get_shared_realm(config);
if (!realm->m_delegate) {
realm->m_delegate = std::make_unique<RJSRealmDelegate>(JSContextGetGlobalContext(ctx));
realm->m_delegate = std::make_unique<RJSRealmDelegate>(realm, JSContextGetGlobalContext(ctx));
}
RJSDefaults(realm.get()) = defaults;
RJSPrototypes(realm.get()) = prototypes;
@ -399,48 +423,60 @@ JSValueRef RealmWrite(JSContextRef ctx, JSObjectRef function, JSObjectRef thisOb
return NULL;
}
namespace realm {
struct Notification {
JSGlobalContextRef ctx;
JSObjectRef realmObject;
JSObjectRef callbackObject;
RJSRealmDelegate::NotificationFunction func;
Notification(JSGlobalContextRef c, JSObjectRef r, JSObjectRef cb, RJSRealmDelegate::NotificationFunction f) : ctx(c), realmObject(r), callbackObject(cb), func(f) {
JSGlobalContextRetain(ctx);
JSValueProtect(ctx, realmObject);
JSValueProtect(ctx, callbackObject);
std::string RJSValidatedNotificationName(JSContextRef ctx, JSValueRef value) {
std::string name = RJSValidatedStringForValue(ctx, value);
if (name != "change") {
throw std::runtime_error("Only the 'change' notification name is supported.");
}
~Notification() {
JSValueUnprotect(ctx, callbackObject);
JSValueUnprotect(ctx, realmObject);
JSGlobalContextRelease(ctx);
}
};
return name;
}
JSValueRef RealmAddNotification(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
JSValueRef RealmAddListener(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
try {
RJSValidateArgumentCount(argumentCount, 1);
RJSValidateArgumentCount(argumentCount, 2);
__unused std::string name = RJSValidatedNotificationName(ctx, arguments[0]);
JSObjectRef callback = RJSValidatedValueToFunction(ctx, arguments[1]);
JSObjectRef callback = RJSValidatedValueToFunction(ctx, arguments[0]);
SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
JSGlobalContextRef gCtx = JSContextGetGlobalContext(ctx);
RJSRealmDelegate::NotificationFunction func = std::make_shared<std::function<void(const std::string)>>([=](std::string notification_name) {
JSValueRef arguments[2];
arguments[0] = thisObject;
arguments[1] = RJSValueForString(gCtx, notification_name);
JSValueRef ex = NULL;
JSObjectCallAsFunction(gCtx, callback, thisObject, 2, arguments, &ex);
if (ex) {
throw RJSException(gCtx, ex);
static_cast<RJSRealmDelegate *>(realm->m_delegate.get())->add_notification(callback);
return NULL;
}
});
catch (std::exception &exp) {
if (jsException) {
*jsException = RJSMakeError(ctx, exp);
}
return NULL;
}
}
static_cast<RJSRealmDelegate *>(realm->m_delegate.get())->add_notification(func);
return RJSWrapObject<Notification *>(ctx, RJSNotificationClass(), new Notification { gCtx, thisObject, callback, func });
JSValueRef RealmRemoveListener(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
try {
RJSValidateArgumentCount(argumentCount, 2);
__unused std::string name = RJSValidatedNotificationName(ctx, arguments[0]);
JSObjectRef callback = RJSValidatedValueToFunction(ctx, arguments[1]);
SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
static_cast<RJSRealmDelegate *>(realm->m_delegate.get())->remove_notification(callback);
return NULL;
}
catch (std::exception &exp) {
if (jsException) {
*jsException = RJSMakeError(ctx, exp);
}
return NULL;
}
}
JSValueRef RealmRemoveAllListeners(JSContextRef ctx, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* jsException) {
try {
RJSValidateArgumentRange(argumentCount, 0, 1);
if (argumentCount) {
RJSValidatedNotificationName(ctx, arguments[0]);
}
SharedRealm realm = *RJSGetInternal<SharedRealm *>(thisObject);
static_cast<RJSRealmDelegate *>(realm->m_delegate.get())->remove_all_notifications();
return NULL;
}
catch (std::exception &exp) {
if (jsException) {
@ -472,7 +508,9 @@ static const JSStaticFunction RJSRealmFuncs[] = {
{"delete", RealmDelete, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"deleteAll", RealmDeleteAll, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"write", RealmWrite, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"addNotification", RealmAddNotification, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"addListener", RealmAddListener, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"removeListener", RealmRemoveListener, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"removeAllListeners", RealmRemoveAllListeners, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{"close", RealmClose, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontEnum | kJSPropertyAttributeDontDelete},
{NULL, NULL},
};
@ -481,9 +519,3 @@ JSClassRef RJSRealmClass() {
static JSClassRef s_realmClass = RJSCreateWrapperClass<SharedRealm *>("Realm", RealmGetProperty, NULL, RJSRealmFuncs);
return s_realmClass;
}
JSClassRef RJSNotificationClass() {
static JSClassRef s_notificationClass = RJSCreateWrapperClass<Notification *>("Notification", NULL, NULL, NULL);
return s_notificationClass;
}

6
src/RealmRPC.cpp
View File

@ -254,12 +254,6 @@ json RPCServer::serialize_json_value(JSValueRef value) {
{"schema", serialize_object_schema(results->object_schema)}
};
}
else if (JSValueIsObjectOfClass(m_context, value, RJSNotificationClass())) {
return {
{"type", RealmObjectTypesNotification},
{"id", store_object(js_object)},
};
}
else if (RJSIsValueArray(m_context, value)) {
size_t length = RJSValidatedListLength(m_context, js_object);
std::vector<json> array;

36
tests/RealmTests.js
View File

@ -282,7 +282,7 @@ module.exports = BaseTest.extend({
var notificationCount = 0;
var notificationName;
var notification = realm.addNotification(function(realm, name) {
realm.addListener('change', function(realm, name) {
notificationCount++;
notificationName = name;
});
@ -290,6 +290,38 @@ module.exports = BaseTest.extend({
TestCase.assertEqual(notificationCount, 0);
realm.write(function() {});
TestCase.assertEqual(notificationCount, 1);
TestCase.assertEqual(notificationName, 'DidChangeNotification');
TestCase.assertEqual(notificationName, 'change');
var secondNotificationCount = 0;
function secondNotification(realm, name) {
secondNotificationCount++;
};
realm.addListener('change', secondNotification)
realm.write(function() {});
TestCase.assertEqual(notificationCount, 2);
TestCase.assertEqual(secondNotificationCount, 1);
realm.removeListener('change', secondNotification);
realm.write(function() {});
TestCase.assertEqual(notificationCount, 3);
TestCase.assertEqual(secondNotificationCount, 1);
realm.removeAllListeners();
realm.write(function() {});
TestCase.assertEqual(notificationCount, 3);
TestCase.assertEqual(secondNotificationCount, 1);
TestCase.assertThrows(function() {
realm.addListener('invalid', function() {});
});
realm.addListener('change', function() {
throw new Error('error');
});
TestCase.assertThrows(function() {
realm.write(function() {});
});
},
});