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invoke.cpp
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/*
* 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>
#include "ignite/cache/cache_entry_processor.h"
using namespace ignite;
using namespace cache;
//tag::invoke[]
/**
* Processor for invoke method.
*/
class IncrementProcessor : public cache::CacheEntryProcessor<std::string, int32_t, int32_t, int32_t>
{
public:
/**
* Constructor.
*/
IncrementProcessor()
{
// No-op.
}
/**
* Copy constructor.
*
* @param other Other instance.
*/
IncrementProcessor(const IncrementProcessor& other)
{
// No-op.
}
/**
* Assignment operator.
*
* @param other Other instance.
* @return This instance.
*/
IncrementProcessor& operator=(const IncrementProcessor& other)
{
return *this;
}
/**
* Call instance.
*/
virtual int32_t Process(MutableCacheEntry<std::string, int32_t>& entry, const int& arg)
{
// Increment the value for a specific key by 1.
// The operation will be performed on the node where the key is stored.
// Note that if the cache does not contain an entry for the given key, it will
// be created.
if (!entry.IsExists())
entry.SetValue(1);
else
entry.SetValue(entry.GetValue() + 1);
return entry.GetValue();
}
};
/**
* Binary type structure. Defines a set of functions required for type to be serialized and deserialized.
*/
namespace ignite
{
namespace binary
{
template<>
struct BinaryType<IncrementProcessor>
{
static int32_t GetTypeId()
{
return GetBinaryStringHashCode("IncrementProcessor");
}
static void GetTypeName(std::string& dst)
{
dst = "IncrementProcessor";
}
static int32_t GetFieldId(const char* name)
{
return GetBinaryStringHashCode(name);
}
static int32_t GetHashCode(const IncrementProcessor& obj)
{
return 0;
}
static bool IsNull(const IncrementProcessor& obj)
{
return false;
}
static void GetNull(IncrementProcessor& dst)
{
dst = IncrementProcessor();
}
static void Write(BinaryWriter& writer, const IncrementProcessor& obj)
{
// No-op.
}
static void Read(BinaryReader& reader, IncrementProcessor& dst)
{
// No-op.
}
};
}
}
int main()
{
IgniteConfiguration cfg;
cfg.springCfgPath = "platforms/cpp/examples/put-get-example/config/example-cache.xml";
Ignite ignite = Ignition::Start(cfg);
// Get cache instance.
Cache<std::string, int32_t> cache = ignite.GetOrCreateCache<std::string, int32_t>("myCache");
// Get binding instance.
IgniteBinding binding = ignite.GetBinding();
// Registering our class as a cache entry processor.
binding.RegisterCacheEntryProcessor<IncrementProcessor>();
std::string key("mykey");
IncrementProcessor inc;
cache.Invoke<int32_t>(key, inc, NULL);
}
//end::invoke[]