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## com.google.appengine.tools.admin
Interface AppAdmin

    public interface AppAdmin

The application administration interface to App Engine. Use this API to update, configure, and otherwise manage an App Engine application. Use `AppAdminFactory` to retrieve an `AppAdmin` instance configured for a specific application.

Synchronous versus Asynchronous requests: Some requests, such as `update(com.google.appengine.tools.admin.UpdateListener)`, occur asynchronously and must be monitored with a `listener`. Other requests, such as `updateIndexes()`, are made synchronously. In either case, work often continues to occur asynchronously on the remote server after the request has been completed.

Error handling: Most configuration operations require communicating to App Engine's remote administration server occur over a network connection. In cases where unrecoverable failures occur (such as a network failure), this API throws an `AdminException`.

Application updates occur transactionally. If a failure occurs during update, you must `rollback()` the incomplete transaction before beginning another.

Nested Class Summary
`static class` | `AppAdmin.LogSeverity` The severity levels for App Engine application logging.

Method Summary
`void` | `configureBackend(java.lang.String backendName)` Reconfigure the backend with the specified name.
`java.util.List<CronEntry>` | `cronInfo()` Locally parses an application's configured cron entries and reports the upcoming several execution times.
`void` | `deleteBackend(java.lang.String backendName)` Delete the backend with the specified name.
`java.util.List<BackendsXml.Entry>` | `listBackends()` Retrieve a list of registered backends with their associated state.
`java.io.Reader` | `requestLogs(int numDays, AppAdmin.LogSeverity severity)` Retrieves application logs from the remote administration server.
`void` | `rollback()` Rolls back an "in-progress" transaction.
`void` | `rollbackAllBackends()` Rolls back an "in-progress" transaction on all backends.
`void` | `rollbackBackend(java.lang.String backend)` Rolls back an "in-progress" transaction on a backend.
`void` | `setBackendState(java.lang.String backendName, BackendsXml.State newState)` Update the state of the backend with the specified name to `newState`.
`void` | `setDefaultVersion()` Sends a synchronous request to update the application's default version.
`void` | `update(UpdateListener listener)` Uploads a new version of the application and updates its indexes.
`void` | `updateAllBackends(UpdateListener listener)` Redeploy all backends.
`void` | `updateBackend(java.lang.String backendName, UpdateListener listener)` Redeploy the backend with the specified name.
`void` | `updateBackends(java.util.List<java.lang.String> backendNames, UpdateListener listener)` Redeploy the backends with the specified names.
`void` | `updateCron()` Sends a synchronous request to update the application's cron jobs.
`void` | `updateDos()` Sends a synchronous request to update the application's DoS configuration.
`void` | `updateIndexes()` Sends a synchronous request to update the application's indexes.
`void` | `updateQueues()` Sends a synchronous request to update the application's task queue definitions.
`void` | `vacuumIndexes(com.google.appengine.tools.admin.ConfirmationCallback<com.google.appengine.tools.admin.IndexDeleter.DeleteIndexAction> callback, UpdateListener listener)` Performs the following three steps: Queries the remote administration server for existing indexes that are not included in the local index configuration file.

Method Detail

### update

    void update(UpdateListener listener)

  Uploads a new version of the application and updates its indexes. The update may occur asynchronously, so an `UpdateListener` must be installed to track progress.

  Parameters:
    `listener` - The listener to be notified of updates. Must not be `null`.
  Throws:
    `AdminException` - if an error occurs.

### rollback

    void rollback()

  Rolls back an "in-progress" transaction. This operation occurs synchronously.

  Throws:
    `AdminException` - if an error occurs.

### rollbackBackend

    void rollbackBackend(java.lang.String backend)

  Rolls back an "in-progress" transaction on a backend. This operation occurs synchronously.

  Parameters:
    `backend` - to rollback, or null for default app
  Throws:
    `AdminException` - if an error occurs.

### rollbackAllBackends

    void rollbackAllBackends()

  Rolls back an "in-progress" transaction on all backends. This operation occurs synchronously.

  Throws:
    `AdminException` - if an error occurs.

### updateIndexes

    void updateIndexes()

  Sends a synchronous request to update the application's indexes. This work completes asynchronously on the server.

  Throws:
    `AdminException` - if an error occurs.

### updateCron

    void updateCron()

  Sends a synchronous request to update the application's cron jobs. This work completes synchronously on the server.

  Throws:
    `AdminException` - if an error occurs.

### updateQueues

    void updateQueues()

  Sends a synchronous request to update the application's task queue definitions. This work completes synchronously on the server.

  Throws:
    `AdminException` - if an error occurs.

### updateDos

    void updateDos()

  Sends a synchronous request to update the application's DoS configuration. This work completes synchronously on the server.

  Throws:
    `AdminException` - if an error occurs.

### cronInfo

    java.util.List<CronEntry> cronInfo()

  Locally parses an application's configured cron entries and reports the upcoming several execution times.

  Throws:
    `AdminException` - if an error occurs.

### vacuumIndexes

    void vacuumIndexes(com.google.appengine.tools.admin.ConfirmationCallback<com.google.appengine.tools.admin.IndexDeleter.DeleteIndexAction> callback,
                       UpdateListener listener)

  Performs the following three steps:
  1. Queries the remote administration server for existing indexes that are not included in the local index configuration file. We will refer to these as orphaned indexes.
  2. If `callback` is not null, then the `confirmAction` method will be called once for each of the orphaned indexes to confirm that it really should be deleted.
  3. A request will be sent to the server to delete each of the confirmed indexes. This work completes asynchronously on the server.

  Parameters:
    `callback` - Used to confirm deletions. May be `null` in which case no confirmation will be done.
    `listener` - The listener to be notified of updates. Must not be `null`.
  Throws:
    `AdminException` - if an error occurs.

### requestLogs

    java.io.Reader requestLogs(int numDays,
                               AppAdmin.LogSeverity severity)

  Retrieves application logs from the remote administration server.

  Parameters:
    `numDays` - The number of days to retrieve logs for. The cut-off point is midnight UTC. Use 0 to get all available logs.
    `severity` - The severity of app-level log messages to get. If null, only request logs are returned.
  Returns:
    a non-null `Reader` which can be used to stream the logs from the remote administration server. You should `close` the `Reader` when you're finished reading logs. It is ok to `close` the `Reader` before all logs have been read (streaming from the server is cancelled).
  Throws:
    `AdminException` - if an error occurs.

### updateBackend

    void updateBackend(java.lang.String backendName,
                       UpdateListener listener)

  Redeploy the backend with the specified name.

### updateBackends

    void updateBackends(java.util.List<java.lang.String> backendNames,
                        UpdateListener listener)

  Redeploy the backends with the specified names.

### updateAllBackends

    void updateAllBackends(UpdateListener listener)

  Redeploy all backends.

### listBackends

    java.util.List<BackendsXml.Entry> listBackends()

  Retrieve a list of registered backends with their associated state.

### setBackendState

    void setBackendState(java.lang.String backendName,
                         BackendsXml.State newState)

  Update the state of the backend with the specified name to `newState`.

### deleteBackend

    void deleteBackend(java.lang.String backendName)

  Delete the backend with the specified name.

### configureBackend

    void configureBackend(java.lang.String backendName)

  Reconfigure the backend with the specified name.

### setDefaultVersion

    void setDefaultVersion()

  Sends a synchronous request to update the application's default version. This work completes synchronously on the server.

  Throws:
    `AdminException` - if an error occurs.

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