RemoteDataCache

```
public class RemoteDataCache<DataType>
extends java.lang.Object
```
RemoteDataCache is a utility for managing calls to remote services to avoid deadlock if a service is down.

Fields
Modifier and Type	Field and Description
`protected xal.extension.service.RemoteData<DataType>`	`_cachedData` latest data that has been cached

Constructors
Constructor and Description
`RemoteDataCache(java.util.concurrent.Callable<DataType> remoteOperation)` Constructor
`RemoteDataCache(java.util.concurrent.Callable<DataType> remoteOperation, UpdateListener updateHandler)` Primary Constructor

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`java.util.Date`	`getTimestamp()` Get the timestamp of the last fetch
`UpdateListener`	`getUpdateListener()` get the update handler
`DataType`	`getValue()` Fetch the value and cache it for future requests
`boolean`	`isConnected()` determine whether the remote service is connected
`void`	`refresh()` Refresh the cache with a fresh call to the remote unless a fetch is already pending
`void`	`setUpdateListener(UpdateListener handler)` set the update handler which is called when the cache has been updated

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

protected volatile xal.extension.service.RemoteData<DataType> _cachedData

latest data that has been cached

public RemoteDataCache(java.util.concurrent.Callable<DataType> remoteOperation)

Constructor

public RemoteDataCache(java.util.concurrent.Callable<DataType> remoteOperation,
                       UpdateListener updateHandler)

Primary Constructor

Class RemoteDataCache<DataType>