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86 lines
2.8 KiB
86 lines
2.8 KiB
////////////////////////////////////////////////////////////////////////////
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//
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// Copyright 2017 Realm Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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////////////////////////////////////////////////////////////////////////////
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#import "RLMRealm+Sync.h"
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#import "RLMObjectBase.h"
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#import "RLMQueryUtil.hpp"
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#import "RLMObjectSchema.h"
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#import "RLMRealm_Private.hpp"
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#import "RLMResults_Private.hpp"
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#import "RLMSchema.h"
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#import "RLMSyncSession.h"
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#import "results.hpp"
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#import "shared_realm.hpp"
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#import "sync/partial_sync.hpp"
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#import "sync/subscription_state.hpp"
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using namespace realm;
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@implementation RLMRealm (Sync)
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- (void)subscribeToObjects:(Class)type where:(NSString *)query callback:(RLMPartialSyncFetchCallback)callback {
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[self verifyThread];
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RLMClassInfo& info = _info[[type className]];
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Query q = RLMPredicateToQuery([NSPredicate predicateWithFormat:query],
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info.rlmObjectSchema, self.schema, self.group);
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struct Holder {
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partial_sync::Subscription subscription;
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partial_sync::SubscriptionNotificationToken token;
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Holder(partial_sync::Subscription&& s) : subscription(std::move(s)) { }
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};
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auto state = std::make_shared<Holder>(partial_sync::subscribe(Results(_realm, std::move(q)), {}));
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state->token = state->subscription.add_notification_callback([=]() mutable {
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if (!callback) {
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return;
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}
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switch (state->subscription.state()) {
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case partial_sync::SubscriptionState::Invalidated:
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case partial_sync::SubscriptionState::Pending:
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case partial_sync::SubscriptionState::Creating:
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return;
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case partial_sync::SubscriptionState::Error:
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try {
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rethrow_exception(state->subscription.error());
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}
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catch (...) {
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NSError *error = nil;
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RLMRealmTranslateException(&error);
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callback(nil, error);
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}
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break;
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case partial_sync::SubscriptionState::Complete:
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callback([RLMResults emptyDetachedResults], nil);
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break;
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}
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callback = nil;
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state->token = {};
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});
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}
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- (RLMSyncSession *)syncSession {
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return [RLMSyncSession sessionForRealm:self];
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}
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@end
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