While this library isGA, please note Google Cloud C++ client libraries donotfollowSemantic Versioning.
Quickstart
The following shows the code that you'll run in thegoogle/cloud/memcache/quickstart/directory, which should give you a taste of the Cloud Memorystore for Memcached API C++ client library API.
#include "google/cloud/memcache/v1/cloud_memcache_client.h"
#include "google/cloud/project.h"
#include <iostream>
int main(int argc, char* argv[]) try {
if (argc != 2) {
std::cerr << "Usage: " << argv[0] << " project-id\n";
return 1;
}
namespace memcache = ::google::cloud::memcache_v1;
auto client =
memcache::CloudMemcacheClient(memcache::MakeCloudMemcacheConnection());
auto const project_id = std::string(argv[1]);
auto const parent = "projects/" + project_id + "/locations/-";
for (auto r : client.ListInstances(parent)) {
if (!r) throw std::move(r).status();
std::cout << r->DebugString() << "\n";
}
return 0;
} catch (google::cloud::Status const& status) {
std::cerr << "google::cloud::Status thrown: " << status << "\n";
return 1;
}
Main classes
The main class in this library ismemcache_v1::CloudMemcacheClient. All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mockmemcache_v1::CloudMemcacheClientwhen testing your application.
Retry, Backoff, and Idempotency Policies.
The library automatically retries requests that fail with transient errors, and usesexponential backoffto backoff between retries. Application developers can override the default policies.
More Information
Error Handling- describes how the library reports errors.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-09-04 UTC."],[[["\u003cp\u003eThe Cloud Memorystore for Memcached API C++ Client Library is a GA-ready tool for managing Memcached instances in Google Cloud Platform (GCP).\u003c/p\u003e\n"],["\u003cp\u003eVersion 2.37.0-rc is the latest release candidate, with a range of versions available, down to 2.11.0 for this C++ client library.\u003c/p\u003e\n"],["\u003cp\u003eThe main class is \u003ccode\u003ememcache_v1::CloudMemcacheClient\u003c/code\u003e, which exposes all RPC functions and can be mocked for testing.\u003c/p\u003e\n"],["\u003cp\u003eThe library handles transient errors automatically with exponential backoff and provides options to override default endpoints, authentication, and behavior via environment variables.\u003c/p\u003e\n"],["\u003cp\u003eThis C++ library does not adhere to semantic versioning.\u003c/p\u003e\n"]]],[],null,["Version 2.12.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/memcache/latest)\n- [2.41.0](/cpp/docs/reference/memcache/2.41.0)\n- [2.40.0](/cpp/docs/reference/memcache/2.40.0)\n- [2.39.0](/cpp/docs/reference/memcache/2.39.0)\n- [2.38.0](/cpp/docs/reference/memcache/2.38.0)\n- [2.37.0](/cpp/docs/reference/memcache/2.37.0)\n- [2.36.0](/cpp/docs/reference/memcache/2.36.0)\n- [2.35.0](/cpp/docs/reference/memcache/2.35.0)\n- [2.34.0](/cpp/docs/reference/memcache/2.34.0)\n- [2.33.0](/cpp/docs/reference/memcache/2.33.0)\n- [2.32.0](/cpp/docs/reference/memcache/2.32.0)\n- [2.31.0](/cpp/docs/reference/memcache/2.31.0)\n- [2.30.0](/cpp/docs/reference/memcache/2.30.0)\n- [2.29.0](/cpp/docs/reference/memcache/2.29.0)\n- [2.28.0](/cpp/docs/reference/memcache/2.28.0)\n- [2.27.0](/cpp/docs/reference/memcache/2.27.0)\n- [2.26.0](/cpp/docs/reference/memcache/2.26.0)\n- [2.25.1](/cpp/docs/reference/memcache/2.25.1)\n- [2.24.0](/cpp/docs/reference/memcache/2.24.0)\n- [2.23.0](/cpp/docs/reference/memcache/2.23.0)\n- [2.22.1](/cpp/docs/reference/memcache/2.22.1)\n- [2.21.0](/cpp/docs/reference/memcache/2.21.0)\n- [2.20.0](/cpp/docs/reference/memcache/2.20.0)\n- [2.19.0](/cpp/docs/reference/memcache/2.19.0)\n- [2.18.0](/cpp/docs/reference/memcache/2.18.0)\n- [2.17.0](/cpp/docs/reference/memcache/2.17.0)\n- [2.16.0](/cpp/docs/reference/memcache/2.16.0)\n- [2.15.1](/cpp/docs/reference/memcache/2.15.1)\n- [2.14.0](/cpp/docs/reference/memcache/2.14.0)\n- [2.13.0](/cpp/docs/reference/memcache/2.13.0)\n- [2.12.0](/cpp/docs/reference/memcache/2.12.0)\n- [2.11.0](/cpp/docs/reference/memcache/2.11.0) \n\nCloud Memorystore for Memcached API C++ Client Library\n======================================================\n\nAn idiomatic C++ client library for the [Cloud Memorystore for Memcached API](https://cloud.google.com/memorystore/docs/memcached), a service for creating and managing Memcached instances in GCP.\n\nWhile this library is **GA** , please note Google Cloud C++ client libraries do **not** follow [Semantic Versioning](https://semver.org/).\n\n### Quickstart\n\nThe following shows the code that you'll run in the `google/cloud/memcache/quickstart/` directory, which should give you a taste of the Cloud Memorystore for Memcached API C++ client library API. \n\n #include \"google/cloud/memcache/v1/cloud_memcache_client.h\"\n #include \"google/cloud/project.h\"\n #include \u003ciostream\u003e\n\n int main(int argc, char* argv[]) try {\n if (argc != 2) {\n std::cerr \u003c\u003c \"Usage: \" \u003c\u003c argv[0] \u003c\u003c \" project-id\\n\";\n return 1;\n }\n\n namespace memcache = ::google::cloud::memcache_v1;\n auto client =\n memcache::CloudMemcacheClient(memcache::MakeCloudMemcacheConnection());\n\n auto const project_id = std::string(argv[1]);\n auto const parent = \"projects/\" + project_id + \"/locations/-\";\n for (auto r : client.ListInstances(parent)) {\n if (!r) throw std::move(r).status();\n std::cout \u003c\u003c r-\u003eDebugString() \u003c\u003c \"\\n\";\n }\n\n return 0;\n } catch (google::cloud::Status const& status) {\n std::cerr \u003c\u003c \"google::cloud::Status thrown: \" \u003c\u003c status \u003c\u003c \"\\n\";\n return 1;\n }\n\n### Main classes\n\nThe main class in this library is [`memcache_v1::CloudMemcacheClient`](/cpp/docs/reference/memcache/2.12.0/classgoogle_1_1cloud_1_1memcache__v1_1_1CloudMemcacheClient). All RPCs are exposed as member functions of this class. Other classes provide helpers, configuration parameters, and infrastructure to mock [`memcache_v1::CloudMemcacheClient`](/cpp/docs/reference/memcache/2.12.0/classgoogle_1_1cloud_1_1memcache__v1_1_1CloudMemcacheClient) when testing your application.\n\n### Retry, Backoff, and Idempotency Policies.\n\nThe library automatically retries requests that fail with transient errors, and uses [exponential backoff](https://en.wikipedia.org/wiki/Exponential_backoff) to backoff between retries. Application developers can override the default policies.\n\n### More Information\n\n- [Error Handling](https://cloud.google.com/cpp/docs/reference/common/latest/common-error-handling.html) - describes how the library reports errors.\n- [How to Override the Default Endpoint](/cpp/docs/reference/memcache/2.12.0/memcache-override-endpoint) - describes how to override the default endpoint.\n- [How to Override the Authentication Credentials](/cpp/docs/reference/memcache/2.12.0/memcache-override-authentication) - describes how to change the authentication credentials used by the library.\n- [Environment Variables](/cpp/docs/reference/memcache/2.12.0/memcache-env) - describes environment variables that can configure the behavior of the library."]]