This shows how to override the retry policies for compute_instance_group_managers_v1::InstanceGroupManagersClient:
auto options =
google::cloud::Options{}
.set<google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersConnectionIdempotencyPolicyOption>(
CustomIdempotencyPolicy().clone())
.set<google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersRetryPolicyOption>(
google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersLimitedErrorCountRetryPolicy(3)
.clone())
.set<google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersBackoffPolicyOption>(
google::cloud::ExponentialBackoffPolicy(
/*initial_delay=*/std::chrono::milliseconds(200),
/*maximum_delay=*/std::chrono::seconds(45),
/*scaling=*/2.0)
.clone());
auto connection = google::cloud::compute_instance_group_managers_v1::
MakeInstanceGroupManagersConnectionRest(options);
// c1 and c2 share the same retry policies
auto c1 = google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersClient(connection);
auto c2 = google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersClient(connection);
// You can override any of the policies in a new client. This new client
// will share the policies from c1 (or c2) *except* for the retry policy.
auto c3 = google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersClient(
connection,
google::cloud::Options{}
.set<google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersRetryPolicyOption>(
google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersLimitedTimeRetryPolicy(
std::chrono::minutes(5))
.clone()));
// You can also override the policies in a single call:
// c3.SomeRpc(..., google::cloud::Options{}
// .set<google::cloud::compute_instance_group_managers_v1::InstanceGroupManagersRetryPolicyOption>(
// google::cloud::compute_instance_group_managers_v1::InstanceGroupManagersLimitedErrorCountRetryPolicy(10).clone()));
Assuming you have created a custom idempotency policy. Such as:
class CustomIdempotencyPolicy
: public google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersConnectionIdempotencyPolicy {
public:
~CustomIdempotencyPolicy() override = default;
std::unique_ptr<google::cloud::compute_instance_group_managers_v1::
InstanceGroupManagersConnectionIdempotencyPolicy>
clone() const override {
return std::make_unique<CustomIdempotencyPolicy>(*this);
}
// Override inherited functions to define as needed.
};
[[["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 2025-08-14 UTC."],[[["\u003cp\u003eThe latest version available for \u003ccode\u003ecompute_instance_group_managers_v1\u003c/code\u003e is \u003ccode\u003e2.37.0-rc\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eYou can override default retry policies for \u003ccode\u003ecompute_instance_group_managers_v1::InstanceGroupManagersClient\u003c/code\u003e using \u003ccode\u003eInstanceGroupManagersConnectionIdempotencyPolicyOption\u003c/code\u003e, \u003ccode\u003eInstanceGroupManagersRetryPolicyOption\u003c/code\u003e, and \u003ccode\u003eInstanceGroupManagersBackoffPolicyOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eRetry policies can be overridden either for a whole client or on a per-call basis.\u003c/p\u003e\n"],["\u003cp\u003eThe example demonstrates creating a custom \u003ccode\u003eCustomIdempotencyPolicy\u003c/code\u003e class to override the default idempotency policy for \u003ccode\u003eInstanceGroupManagersClient\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe webpage provides access to multiple previous versions, from version \u003ccode\u003e2.36.0\u003c/code\u003e all the way to \u003ccode\u003e2.15.1\u003c/code\u003e of the \u003ccode\u003ecompute_instance_group_managers_v1\u003c/code\u003e library.\u003c/p\u003e\n"]]],[],null,["Version latestkeyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/compute/latest/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.41.0](/cpp/docs/reference/compute/2.41.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.40.0](/cpp/docs/reference/compute/2.40.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.39.0](/cpp/docs/reference/compute/2.39.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.38.0](/cpp/docs/reference/compute/2.38.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.37.0](/cpp/docs/reference/compute/2.37.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.36.0](/cpp/docs/reference/compute/2.36.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.35.0](/cpp/docs/reference/compute/2.35.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.34.0](/cpp/docs/reference/compute/2.34.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.33.0](/cpp/docs/reference/compute/2.33.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.32.0](/cpp/docs/reference/compute/2.32.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.31.0](/cpp/docs/reference/compute/2.31.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.30.0](/cpp/docs/reference/compute/2.30.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.29.0](/cpp/docs/reference/compute/2.29.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.28.0](/cpp/docs/reference/compute/2.28.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.27.0](/cpp/docs/reference/compute/2.27.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.26.0](/cpp/docs/reference/compute/2.26.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.25.1](/cpp/docs/reference/compute/2.25.1/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.24.0](/cpp/docs/reference/compute/2.24.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.23.0](/cpp/docs/reference/compute/2.23.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.22.1](/cpp/docs/reference/compute/2.22.1/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.21.0](/cpp/docs/reference/compute/2.21.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.20.0](/cpp/docs/reference/compute/2.20.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.19.0](/cpp/docs/reference/compute/2.19.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.18.0](/cpp/docs/reference/compute/2.18.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.17.0](/cpp/docs/reference/compute/2.17.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.16.0](/cpp/docs/reference/compute/2.16.0/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet)\n- [2.15.1](/cpp/docs/reference/compute/2.15.1/compute_instance_group_managers_v1_1_1InstanceGroupManagersClient-retry-snippet) \n\nOverride compute_instance_group_managers_v1::InstanceGroupManagersClient Retry Policies\n=======================================================================================\n\nThis shows how to override the retry policies for compute_instance_group_managers_v1::InstanceGroupManagersClient: \n\n auto options =\n google::cloud::Options{}\n .set\u003cgoogle::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersConnectionIdempotencyPolicyOption\u003e(\n CustomIdempotencyPolicy().clone())\n .set\u003cgoogle::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersRetryPolicyOption\u003e(\n google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersLimitedErrorCountRetryPolicy(3)\n .clone())\n .set\u003cgoogle::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersBackoffPolicyOption\u003e(\n google::cloud::ExponentialBackoffPolicy(\n /*initial_delay=*/std::chrono::milliseconds(200),\n /*maximum_delay=*/std::chrono::seconds(45),\n /*scaling=*/2.0)\n .clone());\n auto connection = google::cloud::compute_instance_group_managers_v1::\n MakeInstanceGroupManagersConnectionRest(options);\n\n // c1 and c2 share the same retry policies\n auto c1 = google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersClient(connection);\n auto c2 = google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersClient(connection);\n\n // You can override any of the policies in a new client. This new client\n // will share the policies from c1 (or c2) *except* for the retry policy.\n auto c3 = google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersClient(\n connection,\n google::cloud::Options{}\n .set\u003cgoogle::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersRetryPolicyOption\u003e(\n google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersLimitedTimeRetryPolicy(\n std::chrono::minutes(5))\n .clone()));\n\n // You can also override the policies in a single call:\n // c3.SomeRpc(..., google::cloud::Options{}\n // .set\u003cgoogle::cloud::compute_instance_group_managers_v1::InstanceGroupManagersRetryPolicyOption\u003e(\n // google::cloud::compute_instance_group_managers_v1::InstanceGroupManagersLimitedErrorCountRetryPolicy(10).clone()));\n\nAssuming you have created a custom idempotency policy. Such as: \n\n class CustomIdempotencyPolicy\n : public google::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersConnectionIdempotencyPolicy {\n public:\n ~CustomIdempotencyPolicy() override = default;\n std::unique_ptr\u003cgoogle::cloud::compute_instance_group_managers_v1::\n InstanceGroupManagersConnectionIdempotencyPolicy\u003e\n clone() const override {\n return std::make_unique\u003cCustomIdempotencyPolicy\u003e(*this);\n }\n // Override inherited functions to define as needed.\n };"]]