| // Copyright 2012 Google Inc. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| // Simple, map-based implementation of DigestStore. |
| |
| #ifndef GOOGLE_CACHEINVALIDATION_IMPL_SIMPLE_REGISTRATION_STORE_H_ |
| #define GOOGLE_CACHEINVALIDATION_IMPL_SIMPLE_REGISTRATION_STORE_H_ |
| |
| #include <map> |
| |
| #include "google/cacheinvalidation/deps/digest-function.h" |
| #include "google/cacheinvalidation/deps/string_util.h" |
| #include "google/cacheinvalidation/impl/client-protocol-namespace-fix.h" |
| #include "google/cacheinvalidation/impl/digest-store.h" |
| |
| namespace invalidation { |
| |
| using INVALIDATION_STL_NAMESPACE::map; |
| |
| class SimpleRegistrationStore : public DigestStore<ObjectIdP> { |
| public: |
| explicit SimpleRegistrationStore(DigestFunction* digest_function) |
| : digest_function_(digest_function) { |
| RecomputeDigest(); |
| } |
| |
| virtual ~SimpleRegistrationStore() {} |
| |
| virtual bool Add(const ObjectIdP& oid); |
| |
| virtual void Add(const vector<ObjectIdP>& oids, |
| vector<ObjectIdP>* oids_to_send); |
| |
| virtual bool Remove(const ObjectIdP& oid); |
| |
| virtual void Remove(const vector<ObjectIdP>& oids, |
| vector<ObjectIdP>* oids_to_send); |
| |
| virtual void RemoveAll(vector<ObjectIdP>* oids); |
| |
| virtual bool Contains(const ObjectIdP& oid); |
| |
| virtual int size() { |
| return registrations_.size(); |
| } |
| |
| virtual string GetDigest() { |
| return digest_; |
| } |
| |
| virtual void GetElements(const string& oid_digest_prefix, int prefix_len, |
| vector<ObjectIdP>* result); |
| |
| virtual string ToString() { |
| return StringPrintf("SimpleRegistrationStore: %d registrations", |
| static_cast<int>(registrations_.size())); |
| } |
| |
| private: |
| /* Recomputes the digests over all objects and sets this.digest. */ |
| void RecomputeDigest(); |
| |
| /* All the registrations in the store mappd from the digest to the ibject id. |
| */ |
| map<string, ObjectIdP> registrations_; |
| |
| /* The function used to compute digests of objects. */ |
| DigestFunction* digest_function_; |
| |
| /* The memoized digest of all objects in registrations. */ |
| string digest_; |
| }; |
| |
| } // namespace invalidation |
| |
| #endif // GOOGLE_CACHEINVALIDATION_IMPL_SIMPLE_REGISTRATION_STORE_H_ |