| /* |
| * 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 <sstream> |
| |
| #include <ignite/ignition.h> |
| #include <ignite/compute/compute.h> |
| |
| using namespace ignite; |
| |
| //tag::compute-call-async[] |
| /* |
| * Function class. |
| */ |
| class CountLength : public compute::ComputeFunc<int32_t> |
| { |
| friend struct ignite::binary::BinaryType<CountLength>; |
| public: |
| /* |
| * Default constructor. |
| */ |
| CountLength() |
| { |
| // No-op. |
| } |
| |
| /* |
| * Constructor. |
| * |
| * @param text Text. |
| */ |
| CountLength(const std::string& word) : |
| word(word) |
| { |
| // No-op. |
| } |
| |
| /** |
| * Callback. |
| * Counts number of characters in provided word. |
| * |
| * @return Word's length. |
| */ |
| virtual int32_t Call() |
| { |
| return word.length(); |
| } |
| |
| /** Word to print. */ |
| std::string word; |
| |
| }; |
| |
| /** |
| * Binary type structure. Defines a set of functions required for type to be serialized and deserialized. |
| */ |
| namespace ignite |
| { |
| namespace binary |
| { |
| template<> |
| struct BinaryType<CountLength> |
| { |
| static int32_t GetTypeId() |
| { |
| return GetBinaryStringHashCode("CountLength"); |
| } |
| |
| static void GetTypeName(std::string& dst) |
| { |
| dst = "CountLength"; |
| } |
| |
| static int32_t GetFieldId(const char* name) |
| { |
| return GetBinaryStringHashCode(name); |
| } |
| |
| static int32_t GetHashCode(const CountLength& obj) |
| { |
| return 0; |
| } |
| |
| static bool IsNull(const CountLength& obj) |
| { |
| return false; |
| } |
| |
| static void GetNull(CountLength& dst) |
| { |
| dst = CountLength(""); |
| } |
| |
| static void Write(BinaryWriter& writer, const CountLength& obj) |
| { |
| writer.RawWriter().WriteString(obj.word); |
| } |
| |
| static void Read(BinaryReader& reader, CountLength& dst) |
| { |
| dst.word = reader.RawReader().ReadString(); |
| } |
| }; |
| } |
| } |
| |
| int main() |
| { |
| IgniteConfiguration cfg; |
| cfg.springCfgPath = "/path/to/configuration.xml"; |
| |
| Ignite ignite = Ignition::Start(cfg); |
| |
| // Get binding instance. |
| IgniteBinding binding = ignite.GetBinding(); |
| |
| // Registering our class as a compute function. |
| binding.RegisterComputeFunc<CountLength>(); |
| |
| // Get compute instance. |
| compute::Compute asyncCompute = ignite.GetCompute(); |
| |
| std::istringstream iss("Count characters using callable"); |
| std::vector<std::string> words((std::istream_iterator<std::string>(iss)), |
| std::istream_iterator<std::string>()); |
| |
| std::vector<Future<int32_t>> futures; |
| |
| // Iterate through all words in the sentence, create and call jobs. |
| for (std::string word : words) |
| { |
| // Counting number of characters remotely. |
| futures.push_back(asyncCompute.CallAsync<int32_t>(CountLength(word))); |
| } |
| |
| int32_t total = 0; |
| |
| // Counting total number of characters. |
| for (Future<int32_t> future : futures) |
| { |
| // Waiting for results. |
| future.Wait(); |
| |
| total += future.GetValue(); |
| } |
| |
| // Printing result. |
| std::cout << "Total number of characters: " << total << std::endl; |
| } |
| //end::compute-call-async[] |