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// mock_persistence.h
//
// Dummy implementation of mqtt::iclient_persistence for Unit Test.
//
/*******************************************************************************
* Copyright (c) 2016 Guilherme M. Ferreira <guilherme.maciel.ferreira@gmail.com>
* Copyright (c) 2020 Frank Pagliughi <fpagliughi@mindspring.com>
*
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v2.0
* and Eclipse Distribution License v1.0 which accompany this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v20.html
* and the Eclipse Distribution License is available at
* http://www.eclipse.org/org/documents/edl-v10.php.
*
* Contributors:
* Guilherme M. Ferreira - initial implementation and documentation
* Frank Pagliughi - Renamed 'mock', refactored for coding conventions
*******************************************************************************/
#ifndef __mqtt_mock_persistence_h
#define __mqtt_mock_persistence_h
#include "mqtt/exception.h"
#include "mqtt/iclient_persistence.h"
namespace mqtt {
/////////////////////////////////////////////////////////////////////////////
// Dummy persistence is a working in-memory persistence class.
class mock_persistence : virtual public iclient_persistence
{
using base = iclient_persistence;
// Whether the store is open
bool open_{false};
// Use an STL map to store shared persistence pointers
// against string keys.
std::map<std::string, std::string> store_;
public:
static int persistence_open(
void** handle, const char* clientID, const char* serverURI, void* context
)
{
return base::persistence_open(handle, clientID, serverURI, context);
}
static int persistence_close(void* handle) { return base::persistence_close(handle); }
static int persistence_put(
void* handle, char* key, int bufcount, char* buffers[], int buflens[]
)
{
return base::persistence_put(handle, key, bufcount, buffers, buflens);
}
static int persistence_get(void* handle, char* key, char** buffer, int* buflen)
{
return base::persistence_get(handle, key, buffer, buflen);
}
static int persistence_remove(void* handle, char* key)
{
return base::persistence_remove(handle, key);
}
static int persistence_keys(void* handle, char*** keys, int* nkeys)
{
return base::persistence_keys(handle, keys, nkeys);
}
static int persistence_clear(void* handle) { return base::persistence_clear(handle); }
static int persistence_containskey(void* handle, char* key)
{
return base::persistence_containskey(handle, key);
}
// "Open" the store
void open(const std::string& clientId, const std::string& serverURI) override
{
open_ = true;
}
// Close the persistent store that was previously opened.
void close() override { open_ = false; }
// Clears persistence, so that it no longer contains any persisted data.
void clear() override { store_.clear(); }
// Returns whether or not data is persisted using the specified key.
bool contains_key(const std::string& key) override
{
return store_.find(key) != store_.end();
}
// Returns the keys in this persistent data store.
// This could be more efficient, but you get the point.
mqtt::string_collection keys() const override
{
mqtt::string_collection ks;
for (const auto& k : store_) ks.push_back(k.first);
return ks;
}
// Puts the specified data into the persistent store.
void put(const std::string& key, const std::vector<mqtt::string_view>& bufs) override
{
std::string str;
for (const auto& b : bufs) str += b.str();
store_[key] = std::move(str);
}
// Gets the specified data out of the persistent store.
std::string get(const std::string& key) const override
{
auto p = store_.find(key);
if (p == store_.end())
throw mqtt::persistence_exception();
return p->second;
}
// Remove the data for the specified key.
void remove(const std::string& key) override
{
auto p = store_.find(key);
if (p == store_.end())
throw mqtt::persistence_exception();
store_.erase(p);
}
};
/////////////////////////////////////////////////////////////////////////////
// end namespace mqtt
} // namespace mqtt
#endif // __mqtt_mock_persistence_h
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