Java 8 has reached end of support
and will be deprecated
on January 31, 2026. After deprecation, you won't be able to deploy Java 8
applications, even if your organization previously used an organization policy to
re-enable deployments of legacy runtimes. Your existing Java
8 applications will continue to run and receive traffic after their
deprecation date. We recommend that
you migrate to the latest supported version of Java.
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Region ID
The REGION_ID is an abbreviated code that Google assigns
based on the region you select when you create your app. The code does not
correspond to a country or province, even though some region IDs may appear
similar to commonly used country and province codes. For apps created after
February 2020, REGION_ID.r is included in
App Engine URLs. For existing apps created before this date, the
region ID is optional in the URL.
You can use various methods to communicate between your App Engine
services or with other services, including Google Cloud services and
external applications.
The simplest approach for communicating with your App Engine service is
to send targeted HTTP requests, where the URL includes the name or ID of a
resource. For example, you can include the ID of a service or version that you
want to target, in addition to the corresponding Google Cloud project ID:
To share data across databases and your App Engine app or some other
external application, see
Understanding Data and File
Storage.
In the standard environment, you can also pass requests between services and
from services to external endpoints using the
URL Fetch API.
Additionally, services in the standard environment that reside within the same
Google Cloud project can also use one of the App Engine APIs for the
following tasks:
[[["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 2025-08-04 UTC."],[[["The REGION_ID is a code assigned by Google based on the region selected when creating an app, included in App Engine URLs for apps created after February 2020."],["App Engine services can communicate through targeted HTTP requests using URLs that include the service or version ID and project ID."],["Data can be shared across databases, App Engine apps, and external applications using methods outlined in the \"Understanding Data and File Storage\" documentation."],["Within the same Google Cloud project, App Engine services can share a memcache instance and collaborate using Task Queues via specific APIs."],["Certain URL paths are restricted and cannot be used, including those ending with `/eventlog`, starting with `/_ah/`, and some ending with `z`."]]],[]]
