This shows how to override the retry policies for compute_region_instance_groups_v1::RegionInstanceGroupsClient:
auto options =
google::cloud::Options{}
.set<google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsConnectionIdempotencyPolicyOption>(
CustomIdempotencyPolicy().clone())
.set<google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsRetryPolicyOption>(
google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsLimitedErrorCountRetryPolicy(3)
.clone())
.set<google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsBackoffPolicyOption>(
google::cloud::ExponentialBackoffPolicy(
/*initial_delay=*/std::chrono::milliseconds(200),
/*maximum_delay=*/std::chrono::seconds(45),
/*scaling=*/2.0)
.clone());
auto connection = google::cloud::compute_region_instance_groups_v1::
MakeRegionInstanceGroupsConnectionRest(options);
// c1 and c2 share the same retry policies
auto c1 = google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsClient(connection);
auto c2 = google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsClient(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_region_instance_groups_v1::
RegionInstanceGroupsClient(
connection,
google::cloud::Options{}
.set<google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsRetryPolicyOption>(
google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsLimitedTimeRetryPolicy(
std::chrono::minutes(5))
.clone()));
// You can also override the policies in a single call:
// c3.SomeRpc(..., google::cloud::Options{}
// .set<google::cloud::compute_region_instance_groups_v1::RegionInstanceGroupsRetryPolicyOption>(
// google::cloud::compute_region_instance_groups_v1::RegionInstanceGroupsLimitedErrorCountRetryPolicy(10).clone()));
Assuming you have created a custom idempotency policy. Such as:
class CustomIdempotencyPolicy
: public google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsConnectionIdempotencyPolicy {
public:
~CustomIdempotencyPolicy() override = default;
std::unique_ptr<google::cloud::compute_region_instance_groups_v1::
RegionInstanceGroupsConnectionIdempotencyPolicy>
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"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-28 UTC."],[[["\u003cp\u003eThe webpage provides documentation for overriding retry policies for \u003ccode\u003ecompute_region_instance_groups_v1::RegionInstanceGroupsClient\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThe latest release candidate version for this documentation is 2.37.0-rc, while version 2.17.0 is at the bottom of the list of versions available, and versions are provided all the way up to that latest candidate version.\u003c/p\u003e\n"],["\u003cp\u003eUsers can customize retry behavior by setting options for Idempotency, Retry, and Backoff policies, as well as create their own custom Idempotency policies.\u003c/p\u003e\n"],["\u003cp\u003eDifferent clients can share the same retry policies or have individual overrides, which can be done when creating the client or even on a per-call basis.\u003c/p\u003e\n"],["\u003cp\u003eThe provided example demonstrates how to set a retry policy to retry up to 3 times, use an exponential backoff, and override a policy for a client to retry for a limited time of 5 minutes.\u003c/p\u003e\n"]]],[],null,["Version 2.17.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/compute/latest/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.41.0](/cpp/docs/reference/compute/2.41.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.40.0](/cpp/docs/reference/compute/2.40.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.39.0](/cpp/docs/reference/compute/2.39.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.38.0](/cpp/docs/reference/compute/2.38.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.37.0](/cpp/docs/reference/compute/2.37.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.36.0](/cpp/docs/reference/compute/2.36.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.35.0](/cpp/docs/reference/compute/2.35.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.34.0](/cpp/docs/reference/compute/2.34.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.33.0](/cpp/docs/reference/compute/2.33.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.32.0](/cpp/docs/reference/compute/2.32.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.31.0](/cpp/docs/reference/compute/2.31.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.30.0](/cpp/docs/reference/compute/2.30.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.29.0](/cpp/docs/reference/compute/2.29.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.28.0](/cpp/docs/reference/compute/2.28.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.27.0](/cpp/docs/reference/compute/2.27.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.26.0](/cpp/docs/reference/compute/2.26.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.25.1](/cpp/docs/reference/compute/2.25.1/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.24.0](/cpp/docs/reference/compute/2.24.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.23.0](/cpp/docs/reference/compute/2.23.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.22.1](/cpp/docs/reference/compute/2.22.1/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.21.0](/cpp/docs/reference/compute/2.21.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.20.0](/cpp/docs/reference/compute/2.20.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.19.0](/cpp/docs/reference/compute/2.19.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.18.0](/cpp/docs/reference/compute/2.18.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.17.0](/cpp/docs/reference/compute/2.17.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.16.0](/cpp/docs/reference/compute/2.16.0/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet)\n- [2.15.1](/cpp/docs/reference/compute/2.15.1/compute_region_instance_groups_v1_1_1RegionInstanceGroupsClient-retry-snippet) \n\nOverride compute_region_instance_groups_v1::RegionInstanceGroupsClient Retry Policies\n=====================================================================================\n\nThis shows how to override the retry policies for compute_region_instance_groups_v1::RegionInstanceGroupsClient: \n\n auto options =\n google::cloud::Options{}\n .set\u003cgoogle::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsConnectionIdempotencyPolicyOption\u003e(\n CustomIdempotencyPolicy().clone())\n .set\u003cgoogle::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsRetryPolicyOption\u003e(\n google::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsLimitedErrorCountRetryPolicy(3)\n .clone())\n .set\u003cgoogle::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsBackoffPolicyOption\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_region_instance_groups_v1::\n MakeRegionInstanceGroupsConnectionRest(options);\n\n // c1 and c2 share the same retry policies\n auto c1 = google::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsClient(connection);\n auto c2 = google::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsClient(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_region_instance_groups_v1::\n RegionInstanceGroupsClient(\n connection,\n google::cloud::Options{}\n .set\u003cgoogle::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsRetryPolicyOption\u003e(\n google::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsLimitedTimeRetryPolicy(\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_region_instance_groups_v1::RegionInstanceGroupsRetryPolicyOption\u003e(\n // google::cloud::compute_region_instance_groups_v1::RegionInstanceGroupsLimitedErrorCountRetryPolicy(10).clone()));\n\nAssuming you have created a custom idempotency policy. Such as: \n\n class CustomIdempotencyPolicy\n : public google::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsConnectionIdempotencyPolicy {\n public:\n ~CustomIdempotencyPolicy() override = default;\n std::unique_ptr\u003cgoogle::cloud::compute_region_instance_groups_v1::\n RegionInstanceGroupsConnectionIdempotencyPolicy\u003e\n clone() const override {\n return std::make_unique\u003cCustomIdempotencyPolicy\u003e(*this);\n }\n // Override inherited functions to define as needed.\n };"]]
