BackendService (Google App Engine API for Java)

com.google.appengine.api.backends

Interface BackendService


  • Deprecated.

    @Deprecated
    public interface BackendService
    BackendService allows you to retrieve information about backend servers. Backend servers are long running addressable servers that can be used for applications that need to keep persistent state in ram between requests.

    This API is deprecated and has been replaced by ModulesService. Please update your code as soon as possible. See the modules documentation for more information: https://developers.google.com/appengine/docs/java/modules/converting

    This API allows you to retrieve information about the backend handling the current request. It also allows you to to get the address of a specific backend instance in such a way that a local server is used during development and a production server is used in production.

    • Method Summary

      All Methods Instance Methods Abstract Methods Deprecated Methods 
      Modifier and Type Method and Description
      java.lang.String getBackendAddress(java.lang.String backend)
      Deprecated. 
      Get the address of a specific backend in such a way that a local server is used during development and a production server is used in production.
      java.lang.String getBackendAddress(java.lang.String backend, int instance)
      Deprecated. 
      Get the address of a specific backend instance in such a way that a local instance is used during development and a production server instance is used in production.
      java.lang.String getCurrentBackend()
      Deprecated. 
      Get the name of the backend handling the current request.
      int getCurrentInstance()
      Deprecated. 
      Get the instance handling the current request.
    • Field Detail

      • REQUEST_HEADER_BACKEND_REDIRECT

        static final java.lang.String REQUEST_HEADER_BACKEND_REDIRECT
        Deprecated. 
        See Also:
        Constant Field Values
      • REQUEST_HEADER_INSTANCE_REDIRECT

        static final java.lang.String REQUEST_HEADER_INSTANCE_REDIRECT
        Deprecated. 
        See Also:
        Constant Field Values
      • INSTANCE_ID_ENV_ATTRIBUTE

        static final java.lang.String INSTANCE_ID_ENV_ATTRIBUTE
        Deprecated. 
        Environment attribute key where the instance id is stored.
        See Also:
        getCurrentInstance(), Constant Field Values
      • BACKEND_ID_ENV_ATTRIBUTE

        static final java.lang.String BACKEND_ID_ENV_ATTRIBUTE
        Deprecated. 
        Environment attribute key where the backend name is stored.
        See Also:
        getCurrentBackend(), Constant Field Values
      • DEVAPPSERVER_PORTMAPPING_KEY

        static final java.lang.String DEVAPPSERVER_PORTMAPPING_KEY
        Deprecated. 
        See Also:
        Constant Field Values
    • Method Detail

      • getCurrentBackend

        java.lang.String getCurrentBackend()
        Deprecated. 
        Get the name of the backend handling the current request.
        Returns:
        The name of the backend or null if the request is not handled by a backend.
      • getCurrentInstance

        int getCurrentInstance()
        Deprecated. 
        Get the instance handling the current request.
        Returns:
        The instance id or -1 if the request is not handled by a backend.
      • getBackendAddress

        java.lang.String getBackendAddress(java.lang.String backend)
        Deprecated. 
        Get the address of a specific backend in such a way that a local server is used during development and a production server is used in production.
        Parameters:
        backend - The name of the backend
        Returns:
        The address of the backend
      • getBackendAddress

        java.lang.String getBackendAddress(java.lang.String backend,
                                           int instance)
        Deprecated. 
        Get the address of a specific backend instance in such a way that a local instance is used during development and a production server instance is used in production.
        Parameters:
        backend - The name of the backend
        instance - The instance id
        Returns:
        The address of the backend instance

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