| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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. |
| */ |
| #include <stdint.h> |
| #include <iostream> |
| |
| #include <ignite/ignition.h> |
| #include <ignite/cache/query/continuous/continuous_query.h> |
| |
| #include "ignite/examples/person.h" |
| |
| using namespace ignite; |
| using namespace cache; |
| using namespace query; |
| |
| /** |
| * Listener class. |
| */ |
| template<typename K, typename V> |
| class Listener : public event::CacheEntryEventListener<K, V> |
| { |
| public: |
| /** |
| * Default constructor. |
| */ |
| Listener() |
| { |
| // No-op. |
| } |
| |
| /** |
| * Event callback. |
| * |
| * @param evts Events. |
| * @param num Events number. |
| */ |
| virtual void OnEvent(const CacheEntryEvent<K, V>* evts, uint32_t num) |
| { |
| for (uint32_t i = 0; i < num; ++i) |
| { |
| std::cout << "Queried entry [key=" << (evts[i].HasValue() ? evts[i].GetKey() : K()) |
| << ", val=" << (evts[i].HasValue() ? evts[i].GetValue() : V()) << ']' |
| << std::endl; |
| } |
| } |
| }; |
| |
| //tag::continuous-query-filter[] |
| template<typename K, typename V> |
| struct RemoteFilter : event::CacheEntryEventFilter<int32_t, std::string> |
| { |
| /** |
| * Default constructor. |
| */ |
| RemoteFilter() |
| { |
| // No-op. |
| } |
| |
| /** |
| * Destructor. |
| */ |
| virtual ~RemoteFilter() |
| { |
| // No-op. |
| } |
| |
| /** |
| * Event callback. |
| * |
| * @param event Event. |
| * @return True if the event passes filter. |
| */ |
| virtual bool Process(const CacheEntryEvent<K, V>& event) |
| { |
| std::cout << "The value for key " << event.GetKey() << |
| " was updated from " << event.GetOldValue() << " to " << event.GetValue() << std::endl; |
| return true; |
| } |
| }; |
| |
| namespace ignite |
| { |
| namespace binary |
| { |
| template<> |
| struct BinaryType< RemoteFilter<int32_t, std::string> > |
| { |
| static int32_t GetTypeId() |
| { |
| return GetBinaryStringHashCode("RemoteFilter<int32_t,std::string>"); |
| } |
| |
| static void GetTypeName(std::string& dst) |
| { |
| dst = "RemoteFilter<int32_t,std::string>"; |
| |
| } |
| |
| static int32_t GetFieldId(const char* name) |
| { |
| return GetBinaryStringHashCode(name); |
| } |
| |
| static bool IsNull(const RemoteFilter<int32_t, std::string>&) |
| { |
| return false; |
| } |
| |
| static void GetNull(RemoteFilter<int32_t, std::string>& dst) |
| { |
| dst = RemoteFilter<int32_t, std::string>(); |
| } |
| |
| static void Write(BinaryWriter& writer, const RemoteFilter<int32_t, std::string>& obj) |
| { |
| // No-op. |
| } |
| |
| static void Read(BinaryReader& reader, RemoteFilter<int32_t, std::string>& dst) |
| { |
| // No-op. |
| } |
| }; |
| } |
| } |
| |
| int main() |
| { |
| IgniteConfiguration cfg; |
| cfg.springCfgPath = "/path/to/configuration.xml"; |
| |
| // Start a node. |
| Ignite ignite = Ignition::Start(cfg); |
| |
| // Get binding. |
| IgniteBinding binding = ignite.GetBinding(); |
| |
| // Registering remote filter. |
| binding.RegisterCacheEntryEventFilter<RemoteFilter<int32_t, std::string>>(); |
| |
| // Get cache instance. |
| Cache<int32_t, std::string> cache = ignite.GetOrCreateCache<int32_t, std::string>("myCache"); |
| |
| // Declaring custom listener. |
| Listener<int32_t, std::string> listener; |
| |
| // Declaring filter. |
| RemoteFilter<int32_t, std::string> filter; |
| |
| // Declaring continuous query. |
| continuous::ContinuousQuery<int32_t, std::string> qry(MakeReference(listener), MakeReference(filter)); |
| } |
| //end::continuous-query-filter[] |