here-data-sdk-cpp/examples/ProtectedCacheExample.cpp at master · isidorowiczdev/here-data-sdk-cpp · GitHub

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* 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.

* SPDX-License-Identifier: Apache-2.0

* License-Filename: LICENSE

#include "ProtectedCacheExample.h"

#include <olp/authentication/TokenProvider.h>

#include <olp/core/cache/CacheSettings.h>

#include <olp/core/cache/DefaultCache.h>

#include <olp/core/client/HRN.h>

#include <olp/core/client/OlpClientSettingsFactory.h>

#include <olp/core/logging/Log.h>

#include <olp/core/utils/Dir.h>

#include <olp/dataservice/read/VersionedLayerClient.h>

#include <future>

#include <iostream>

namespace {

constexpr auto kLogTag = "protected-cache-example";

#ifdef _WIN32

constexpr auto kClientCacheDir = "\\catalog_client_example\\cache";

#else

constexpr auto kClientCacheDir = "/catalog_client_example/cache";

#endif

std::string first_layer_id("versioned-world-layer");

std::string first_partition_id("1");

// handles data response

bool HandleDataResponse(

const olp::dataservice::read::DataResponse& data_response) {

if (data_response.IsSuccessful()) {

const auto& response_result = data_response.GetResult();

OLP_SDK_LOG_INFO_F(kLogTag,

"Request partition data - Success, data size - %ld",

response_result->size());

return true;

} else {

OLP_SDK_LOG_ERROR_F(

kLogTag, "Request partition data - Failure(%d): %s",

static_cast<int>(data_response.GetError().GetErrorCode()),

data_response.GetError().GetMessage().c_str());

return false;

}

} // namespace

int RunExampleReadWithCache(const AccessKey& access_key,

const olp::cache::CacheSettings& cache_settings,

const std::string& catalog) {

OLP_SDK_LOG_INFO_F(

kLogTag, "Mutable cache path is \"%s\"",

olp::porting::value_or(cache_settings.disk_path_mutable, "none").c_str());

OLP_SDK_LOG_INFO_F(

kLogTag, "Protected cache path is \"%s\"",

olp::porting::value_or(cache_settings.disk_path_protected, "none")

.c_str());

// Create a task scheduler instance

std::shared_ptr<olp::thread::TaskScheduler> task_scheduler =

olp::client::OlpClientSettingsFactory::CreateDefaultTaskScheduler(1u);

// Create a network client

std::shared_ptr<olp::http::Network> http_client = olp::client::

OlpClientSettingsFactory::CreateDefaultNetworkRequestHandler();

// Get your access credentials from the **credentials.properties** file that

// you can download from the Open Location Platform (OLP)

// [website](https://developer.here.com/olp/documentation/access-control/user-guide/topics/get-credentials.html).

const auto read_credentials_result =

olp::authentication::AuthenticationCredentials::ReadFromFile();

// Initialize authentication settings.

olp::authentication::Settings settings{olp::porting::value_or(

read_credentials_result, {access_key.id, access_key.secret})};

settings.task_scheduler = task_scheduler;

settings.network_request_handler = http_client;

// Setup AuthenticationSettings with a default token provider that will

// retrieve an OAuth 2.0 token from OLP.

olp::client::AuthenticationSettings auth_settings;

auth_settings.token_provider =

olp::authentication::TokenProviderDefault(std::move(settings));

// Create and initialize cache

auto cache = std::make_shared<olp::cache::DefaultCache>(cache_settings);

cache->Open();

// Setup OlpClientSettings and provide it to the CatalogClient.

olp::client::OlpClientSettings client_settings;

client_settings.authentication_settings = auth_settings;

client_settings.task_scheduler = std::move(task_scheduler);

client_settings.network_request_handler = std::move(http_client);

client_settings.cache = cache;

// Create appropriate layer client with HRN, layer name and settings.

olp::dataservice::read::VersionedLayerClient layer_client(

olp::client::HRN(catalog), first_layer_id, olp::porting::none,

client_settings);

// Retrieve the partition data

// Create a DataRequest with appropriate LayerId and PartitionId

auto request =

olp::dataservice::read::DataRequest().WithPartitionId(first_partition_id);

if (cache_settings.disk_path_protected.has_value()) {

request.WithFetchOption(olp::dataservice::read::FetchOptions::CacheOnly);

}

// Run the DataRequest

auto future = layer_client.GetData(request);

// Wait for DataResponse

olp::dataservice::read::DataResponse data_response = future.GetFuture().get();

// Compact mutable cache, so it can be used as protected cache

cache->Compact();

// Retrieve data from the response

return (HandleDataResponse(data_response) ? 0 : -1);

}

int RunExampleProtectedCache(const AccessKey& access_key,

const std::string& catalog) {

// Read data with mutable cache.

olp::cache::CacheSettings cache_settings;

cache_settings.disk_path_mutable =

olp::utils::Dir::TempDirectory() + kClientCacheDir;

if (RunExampleReadWithCache(access_key, cache_settings, catalog)) {

OLP_SDK_LOG_ERROR(kLogTag, "Error read data with mutable cache.");

return -1;

}

// Read data with protected cache. Set mutable cache to none.

cache_settings.disk_path_protected = cache_settings.disk_path_mutable;

cache_settings.disk_path_mutable = olp::porting::none;

return RunExampleReadWithCache(access_key, cache_settings, catalog);

}

here-data-sdk-cpp/examples/ProtectedCacheExample.cpp at master · isidorowiczdev/here-data-sdk-cpp · GitHub

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