MemcacheService (Objectify App Engine 6.0.7 API)

All Known Implementing Classes:

SpyMemcacheService
```
public interface MemcacheService
```
The interface that all memory cache services must implement. In theory you could write a redis (or whatnot) based implementation, but this was designed around memcached. The implementation must handle 'null' as a value. Note that memcached doesn't handle this natively; the impl takes care of translating it to something that can be stored.

Nested Class Summary

Nested Classes
Modifier and Type Interface Description

static class MemcacheService.CasPut

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`deleteAll(Collection<String> keys)`
`Object`	`get(String key)`
`Map<String,Object>`	`getAll(Collection<String> keys)`
`Map<String,IdentifiableValue>`	`getIdentifiables(Collection<String> keys)`	For cache implementations that don't handle a cold cache for a key (eg memcached), the implementation of this method needs to hide that behavior (ie, bootstrap an initial value so we can get a CAS value).
`void`	`put(String key, Object thing)`	Values can be null
`void`	`putAll(Map<String,Object> values)`	Values can be null
`Set<String>`	`putIfUntouched(Map<String,MemcacheService.CasPut> values)`	Values can be null

- Method Detail
  - get
```
Object get(String key)
```
    Returns:
    
    the value in memcache for this, or null if there was nothing there
  - getIdentifiables
```
Map<String,IdentifiableValue> getIdentifiables(Collection<String> keys)
```
    For cache implementations that don't handle a cold cache for a key (eg memcached), the implementation of this method needs to hide that behavior (ie, bootstrap an initial value so we can get a CAS value). That doesn't mean the result will always be a value; the bootstrap may fail (for whatever reason) and the resulting map value for a key will be null.
  - getAll
```
Map<String,Object> getAll(Collection<String> keys)
```
  - put
```
void put(String key,
         Object thing)
```
    Values can be null
  - putAll
```
void putAll(Map<String,Object> values)
```
    Values can be null
  - putIfUntouched
```
Set<String> putIfUntouched(Map<String,MemcacheService.CasPut> values)
```
    Values can be null
    
    Returns:
    
    a set of all the keys that succeeded
  - deleteAll
```
void deleteAll(Collection<String> keys)
```