/*
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* Copyright 2014 Google Inc. All rights reserved.
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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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#include "cached_greeter.h"
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#include "key_value_storage.h"
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class CachedGreeterImpl : public Greeter {
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private:
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Greeter* greeter;
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KeyValueStorage* keyValueStorage;
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public:
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INJECT(CachedGreeterImpl(Greeter* greeter, KeyValueStorage* keyValueStorage))
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: greeter(greeter), keyValueStorage(keyValueStorage) {
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}
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std::string greet() override {
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std::string greeting = keyValueStorage->get("greeting");
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if (!greeting.empty()) {
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return greeting;
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}
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// Not in the cache, we need to compute the greeting.
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greeting = greeter->greet();
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// We also add it in the cache so that later calls don't need to call greeter->greet().
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keyValueStorage->put("greeting", greeting);
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return greeting;
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}
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};
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fruit::Component<fruit::Annotated<Cached, Greeter>> getCachedGreeterComponent() {
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return fruit::createComponent()
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.bind<fruit::Annotated<Cached, Greeter>, CachedGreeterImpl>()
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.install(getKeyValueStorageComponent)
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.install(getGreeterComponent);
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}
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