Instances of this class created via copy-construction or copy-assignment always compare equal. Instances created with equal std::shared_ptr<*Connection> objects compare equal. Objects that compare equal share the same underlying resources.
Performance
Creating a new instance of this class is a relatively expensive operation, new objects establish new connections to the service. In contrast, copy-construction, move-construction, and the corresponding assignment operations are relatively efficient as the copies share all underlying resources.
Thread Safety
Concurrent access to different instances of this class, even if they compare equal, is guaranteed to work. Two or more threads operating on the same instance of this class is not guaranteed to work. Since copy-construction and move-construction is a relatively efficient operation, consider using such a copy when using this class from multiple threads.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.appengine.v1.GetApplicationRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.appengine.v1.CreateApplicationRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.appengine.v1.Application proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Creates an App Engine application for a Google Cloud Platform project.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
Creates an App Engine application for a Google Cloud Platform project.
This method accepts a google::longrunning::Operation that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.appengine.v1.UpdateApplicationRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.appengine.v1.Application proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
This method accepts a google::longrunning::Operation that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.
Recreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account.
Use this method if you receive an error message about a missing feature, for example, Error retrieving the App Engine service account. If you have deleted your App Engine service account, this will not be able to recreate it. Instead, you should attempt to use the IAM undelete API if possible at https://cloud.google.com/iam/reference/rest/v1/projects.serviceAccounts/undelete?apix_params=%7B"name"%3A"projects%2F-%2FserviceAccounts%2Funique_id"%2C"resource"%3A%7B%7D%7D . If the deletion was recent, the numeric ID can be found in the Cloud Console Activity Log.
Unary RPCs, such as the one wrapped by this function, receive a single request proto message which includes all the inputs for the RPC. In this case, the proto message is a google.appengine.v1.RepairApplicationRequest. Proto messages are converted to C++ classes by Protobuf, using the Protobuf mapping rules.
opts
Options
Optional. Override the class-level options, such as retry and backoff policies.
A future that becomes satisfied when the LRO (Long Running Operation) completes or the polling policy in effect for this call is exhausted. The future is satisfied with an error if the LRO completes with an error or the polling policy is exhausted. In this case the StatusOr returned by the future contains the error. If the LRO completes successfully the value of the future contains the LRO's result. For this RPC the result is a google.appengine.v1.Application proto message. The C++ class representing this message is created by Protobuf, using the Protobuf mapping rules.
Recreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account.
Specifying the NoAwaitTag immediately returns the [google::longrunning::Operation] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.
Recreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account.
This method accepts a google::longrunning::Operation that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.
[[["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 2025-08-14 UTC."],[],[],null,["# Class ApplicationsClient (2.38.0)\n\nVersion 2.38.0keyboard_arrow_down\n\n- [2.42.0-rc (latest)](/cpp/docs/reference/appengine/latest/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.41.0](/cpp/docs/reference/appengine/2.41.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.40.0](/cpp/docs/reference/appengine/2.40.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.39.0](/cpp/docs/reference/appengine/2.39.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.38.0](/cpp/docs/reference/appengine/2.38.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.37.0](/cpp/docs/reference/appengine/2.37.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.36.0](/cpp/docs/reference/appengine/2.36.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.35.0](/cpp/docs/reference/appengine/2.35.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.34.0](/cpp/docs/reference/appengine/2.34.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.33.0](/cpp/docs/reference/appengine/2.33.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.32.0](/cpp/docs/reference/appengine/2.32.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.31.0](/cpp/docs/reference/appengine/2.31.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.30.0](/cpp/docs/reference/appengine/2.30.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.29.0](/cpp/docs/reference/appengine/2.29.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.28.0](/cpp/docs/reference/appengine/2.28.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.27.0](/cpp/docs/reference/appengine/2.27.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.26.0](/cpp/docs/reference/appengine/2.26.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.25.1](/cpp/docs/reference/appengine/2.25.1/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.24.0](/cpp/docs/reference/appengine/2.24.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.23.0](/cpp/docs/reference/appengine/2.23.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.22.1](/cpp/docs/reference/appengine/2.22.1/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.21.0](/cpp/docs/reference/appengine/2.21.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.20.0](/cpp/docs/reference/appengine/2.20.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.19.0](/cpp/docs/reference/appengine/2.19.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.18.0](/cpp/docs/reference/appengine/2.18.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.17.0](/cpp/docs/reference/appengine/2.17.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.16.0](/cpp/docs/reference/appengine/2.16.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.15.1](/cpp/docs/reference/appengine/2.15.1/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.14.0](/cpp/docs/reference/appengine/2.14.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.13.0](/cpp/docs/reference/appengine/2.13.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.12.0](/cpp/docs/reference/appengine/2.12.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient)\n- [2.11.0](/cpp/docs/reference/appengine/2.11.0/classgoogle_1_1cloud_1_1appengine__v1_1_1ApplicationsClient) \nManages App Engine applications. \n\n###### Equality\n\nInstances of this class created via copy-construction or copy-assignment always compare equal. Instances created with equal `std::shared_ptr\u003c*Connection\u003e` objects compare equal. Objects that compare equal share the same underlying resources.\n\n###### Performance\n\nCreating a new instance of this class is a relatively expensive operation, new objects establish new connections to the service. In contrast, copy-construction, move-construction, and the corresponding assignment operations are relatively efficient as the copies share all underlying resources.\n\n###### Thread Safety\n\nConcurrent access to different instances of this class, even if they compare equal, is guaranteed to work. Two or more threads operating on the same instance of this class is not guaranteed to work. Since copy-construction and move-construction is a relatively efficient operation, consider using such a copy when using this class from multiple threads.\n\nConstructors\n------------\n\n### ApplicationsClient(ApplicationsClient const \\&)\n\nCopy and move support\n\n### ApplicationsClient(ApplicationsClient \\&\\&)\n\nCopy and move support\n\n### ApplicationsClient(std::shared_ptr\\\u003c ApplicationsConnection \\\u003e, Options)\n\nOperators\n---------\n\n### operator=(ApplicationsClient const \\&)\n\nCopy and move support\n\n### operator=(ApplicationsClient \\&\\&)\n\nCopy and move support\n\nFunctions\n---------\n\n### GetApplication(std::string const \\&, Options)\n\nGets information about an application.\n\n### GetApplication(google::appengine::v1::GetApplicationRequest const \\&, Options)\n\nGets information about an application.\n\n### CreateApplication(google::appengine::v1::CreateApplicationRequest const \\&, Options)\n\nCreates an App Engine application for a Google Cloud Platform project. \nRequired fields:\n\n- `id` - The ID of the target Cloud Platform project.\n- *location* - The [region](https://cloud.google.com/appengine/docs/locations) where you want the App Engine application located.\n\nFor more information about App Engine applications, see [Managing Projects, Applications, and Billing](https://cloud.google.com/appengine/docs/standard/python/console/).\n\n### CreateApplication(NoAwaitTag, google::appengine::v1::CreateApplicationRequest const \\&, Options)\n\nCreates an App Engine application for a Google Cloud Platform project. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### CreateApplication(google::longrunning::Operation const \\&, Options)\n\nCreates an App Engine application for a Google Cloud Platform project. \nThis method accepts a `google::longrunning::Operation` that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.\n\n### UpdateApplication(google::appengine::v1::UpdateApplicationRequest const \\&, Options)\n\nUpdates the specified Application resource. \nYou can update the following fields:\n\n- `auth_domain` - Google authentication domain for controlling user access to the application.\n- `default_cookie_expiration` - Cookie expiration policy for the application.\n- `iap` - Identity-Aware Proxy properties for the application.\n\n### UpdateApplication(NoAwaitTag, google::appengine::v1::UpdateApplicationRequest const \\&, Options)\n\nUpdates the specified Application resource. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### UpdateApplication(google::longrunning::Operation const \\&, Options)\n\nUpdates the specified Application resource. \nThis method accepts a `google::longrunning::Operation` that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background.\n\n### RepairApplication(google::appengine::v1::RepairApplicationRequest const \\&, Options)\n\nRecreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account. \nUse this method if you receive an error message about a missing feature, for example, *Error retrieving the App Engine service account* . If you have deleted your App Engine service account, this will not be able to recreate it. Instead, you should attempt to use the IAM undelete API if possible at \u003chttps://cloud.google.com/iam/reference/rest/v1/projects.serviceAccounts/undelete?apix_params=%7B\u003e\"name\"%3A\"projects%2F-%2FserviceAccounts%2Funique_id\"%2C\"resource\"%3A%7B%7D%7D . If the deletion was recent, the numeric ID can be found in the Cloud Console Activity Log.\n\n### RepairApplication(NoAwaitTag, google::appengine::v1::RepairApplicationRequest const \\&, Options)\n\nRecreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account. \nSpecifying the [`NoAwaitTag`](https://cloud.google.com/cpp/docs/reference/common/latest/structgoogle_1_1cloud_1_1NoAwaitTag.html) immediately returns the \\[`google::longrunning::Operation`\\] that corresponds to the Long Running Operation that has been started. No polling for operation status occurs.\n\n### RepairApplication(google::longrunning::Operation const \\&, Options)\n\nRecreates the required App Engine features for the specified App Engine application, for example a Cloud Storage bucket or App Engine service account. \nThis method accepts a `google::longrunning::Operation` that corresponds to a previously started Long Running Operation (LRO) and polls the status of the LRO in the background."]]
