Java 8은 지원이 종료되었으며 2026년 1월 31일에 지원 중단됩니다. 지원 중단 후에는 조직에서 이전에 조직 정책을 사용하여 레거시 런타임의 배포를 다시 사용 설정한 경우에도 Java 8 애플리케이션을 배포할 수 없습니다. 기존 Java 8 애플리케이션은 지원 중단 날짜 이후에도 계속 실행되고 트래픽을 수신합니다. 지원되는 최신 Java 버전으로 마이그레이션하는 것이 좋습니다.
Datastore 읽기 및 쓰기 가능 여부도 별도로 쿼리할 수 있습니다. 다음 샘플은 Datastore 쓰기 가능 여부를 감지하는 방법을 보여주고, 다운타임 중 사용자에게 메시지를 제공합니다.
CapabilityStatusstatus=service.getStatus(Capability.DATASTORE_WRITE).getStatus();if(status==CapabilityStatus.DISABLED){// Datastore is in read-only mode.}
[[["이해하기 쉬움","easyToUnderstand","thumb-up"],["문제가 해결됨","solvedMyProblem","thumb-up"],["기타","otherUp","thumb-up"]],[["이해하기 어려움","hardToUnderstand","thumb-down"],["잘못된 정보 또는 샘플 코드","incorrectInformationOrSampleCode","thumb-down"],["필요한 정보/샘플이 없음","missingTheInformationSamplesINeed","thumb-down"],["번역 문제","translationIssue","thumb-down"],["기타","otherDown","thumb-down"]],["최종 업데이트: 2025-09-04(UTC)"],[[["\u003cp\u003eThe Capabilities API allows applications to detect outages and scheduled downtime for specific API capabilities, helping to minimize application downtime by bypassing unavailable services.\u003c/p\u003e\n"],["\u003cp\u003eThis API supports first-generation runtimes and can be utilized when upgrading to corresponding second-generation runtimes, with specific migration guidance provided for Java 11/17 runtimes.\u003c/p\u003e\n"],["\u003cp\u003eThe API returns an \u003ccode\u003eENABLED\u003c/code\u003e status for all services except "Datastore writes," which returns \u003ccode\u003eDISABLED\u003c/code\u003e when Datastore is in read-only mode.\u003c/p\u003e\n"],["\u003cp\u003eYou can query the availability of Datastore reads and writes separately, enabling you to handle read-only mode scenarios by displaying a custom message to users.\u003c/p\u003e\n"],["\u003cp\u003eThe API can verify the status of services like BLOBSTORE, Datastore, Images, Mail, Memcache, Task Queue, and URL Fetch, allowing for more fault-tolerant applications.\u003c/p\u003e\n"]]],[],null,["# Capabilities API for legacy bundled services\n\nWith the Capabilities API, your application can detect outages and scheduled\ndowntime for specific [API capabilities](#Supported_capabilities). You can use\nthis API to reduce downtime in your application by detecting when a capability\nis unavailable and then bypassing it. .\n| This API is supported for first-generation runtimes and can be used when [upgrading to corresponding second-generation runtimes](/appengine/docs/standard/\n| java-gen2\n|\n| /services/access). If you are updating to the App Engine Java 11/17 runtime, refer to the [migration guide](/appengine/migration-center/standard/migrate-to-second-gen/java-differences) to learn about your migration options for legacy bundled services.\n| Every status request to this API always returns `ENABLED` except\n| for the \"Datastore writes\" capability, which returns `DISABLED` if\n| Datastore is in read-only mode for your app.\n\nFor example, if you use the Images API to resize images, you can use the\nCapabilities API to detect when the Images API is unavailable and skip the\nresize: \n\n import com.google.appengine.api.capabilities.*;\n\n https://cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.capabilities.CapabilitiesService.html service =\n https://cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.capabilities.CapabilitiesServiceFactory.html.getCapabilitiesService();\n https://cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.capabilities.CapabilityStatus.html status = service.https://cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.capabilities.CapabilitiesService.html#com_google_appengine_api_capabilities_CapabilitiesService_getStatus_com_google_appengine_api_capabilities_Capability_(Capability.IMAGES).getStatus();\n\n if (status == https://cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.capabilities.CapabilityStatus.html.DISABLED) {\n // Images API is not available.\n }\n\nYou can separately query for the availability of Datastore reads and writes. The\nfollowing sample shows how to detect the availability of Datastore writes and,\nduring downtime, provide a message to users: \n\n CapabilityStatus status =\n service.getStatus(Capability.DATASTORE_WRITE).getStatus();\n\n if (status == CapabilityStatus.DISABLED) {\n // Datastore is in read-only mode.\n }\n\nUsing the Capabilities API in Java 8\n------------------------------------\n\nEach Capability is represented as a static constant on the Capability class,\nsuch as\n[`Capability.DATASTORE_WRITE`](/appengine/docs/legacy/standard/java/javadoc/com/google/appengine/api/capabilities/Capability#DATASTORE_WRITE).\nEach Capability has a state, which you can retrieve from\n[`CapabilitiesService.getStatus(Capability)`](/appengine/docs/legacy/standard/java/javadoc/com/google/appengine/api/capabilities/CapabilitiesService#getStatus-com.google.appengine.api.capabilities.Capability-).\nEach state has a status, which is an enumeration reflecting a the availability\nof a capability: either `ENABLED` or `DISABLED`. See below for the\n[list of services](#Supported_capabilities) currently enabled in this API.\n\nSupported capabilities\n----------------------\n\nThe API currently supports the following capabilities:"]]
