public interface AsyncMemcacheService extends BaseMemcacheService

An asynchronous version of [MemcacheService](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService). All methods return
immediately and provide [Futures](https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html) as their return values.

## Implements

[BaseMemcacheService](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.BaseMemcacheService)

## Methods

### \<T\>deleteAll(Collection\<T\> keys)

    public abstract Future<Set<T>> <T>deleteAll(Collection<T> keys)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Set.html<T>>` |   |

### \<T\>deleteAll(Collection\<T\> keys, long millisNoReAdd)

    public abstract Future<Set<T>> <T>deleteAll(Collection<T> keys, long millisNoReAdd)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |
| `millisNoReAdd` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Set.html<T>>` |   |

### \<T\>getAll(Collection\<T\> keys)

    public abstract Future<Map<T,Object>> <T>getAll(Collection<T> keys)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html>>` |   |

### \<T\>getIdentifiables(Collection\<T\> keys)

    public abstract Future<Map<T,MemcacheService.IdentifiableValue>> <T>getIdentifiables(Collection<T> keys)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.IdentifiableValue>>` |   |

### \<T\>getItemsForPeek(Collection\<T\> keys)

    public abstract Future<Map<T,MemcacheService.ItemForPeek>> <T>getItemsForPeek(Collection<T> keys)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.ItemForPeek>>` |   |

### \<T\>incrementAll(Collection\<T\> keys, long delta)

    public abstract Future<Map<T,Long>> <T>incrementAll(Collection<T> keys, long delta)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |
| `delta` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>>` |   |

### \<T\>incrementAll(Collection\<T\> keys, long delta, Long initialValue)

    public abstract Future<Map<T,Long>> <T>incrementAll(Collection<T> keys, long delta, Long initialValue)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `keys` | `https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html<T>` |
| `delta` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |
| `initialValue` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>>` |   |

### \<T\>incrementAll(Map\<T,Long\> offsets)

    public abstract Future<Map<T,Long>> <T>incrementAll(Map<T,Long> offsets)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `offsets` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>>` |   |

### \<T\>incrementAll(Map\<T,Long\> offsets, Long initialValue)

    public abstract Future<Map<T,Long>> <T>incrementAll(Map<T,Long> offsets, Long initialValue)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `offsets` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>` |
| `initialValue` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>>` |   |

### \<T\>putAll(Map\<T,?\> values, Expiration expires, MemcacheService.SetPolicy policy)

    public abstract Future<Set<T>> <T>putAll(Map<T,?> values, Expiration expires, MemcacheService.SetPolicy policy)

See Also: [MemcacheService#putAll(Map, Expiration, SetPolicy)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_putAll_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `values` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,?>` |
| `expires` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |
| `policy` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.SetPolicy` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Set.html<T>>` |   |

### \<T\>putIfUntouched(Map\<T,MemcacheService.CasValues\> values)

    public abstract Future<Set<T>> <T>putIfUntouched(Map<T,MemcacheService.CasValues> values)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `values` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.CasValues>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Set.html<T>>` |   |

### \<T\>putIfUntouched(Map\<T,MemcacheService.CasValues\> values, Expiration expiration)

    public abstract Future<Set<T>> <T>putIfUntouched(Map<T,MemcacheService.CasValues> values, Expiration expiration)

See Also: \<xref uid="com.google.appengine.api.memcache.MemcacheService.


| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `values` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<T,https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.CasValues>` |
| `expiration` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/util/Set.html<T>>` |   |

### clearAll()

    public abstract Future<Void> clearAll()

See Also: [MemcacheService#clearAll()](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_clearAll__)

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html>` |   |

### contains(Object key)

    public abstract Future<Boolean> contains(Object key)

See Also: [MemcacheService#contains(Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_contains_java_lang_Object_)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |

### delete(Object key)

    public abstract Future<Boolean> delete(Object key)

See Also: [MemcacheService#delete(Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_delete_java_lang_Object_)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |

### delete(Object key, long millisNoReAdd)

    public abstract Future<Boolean> delete(Object key, long millisNoReAdd)

See Also: [MemcacheService#delete(Object, long)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_delete_java_lang_Object_long_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `millisNoReAdd` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |

### get(Object key)

    public abstract Future<Object> get(Object key)

See Also: [MemcacheService#get(Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_get_java_lang_Object_)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html>` |   |

### getIdentifiable(Object key)

    public abstract Future<MemcacheService.IdentifiableValue> getIdentifiable(Object key)

See Also: [MemcacheService#getIdentifiable(Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_getIdentifiable_java_lang_Object_)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.IdentifiableValue>` |   |

### getItemForPeek(Object key)

    public abstract Future<MemcacheService.ItemForPeek> getItemForPeek(Object key)

See Also: [MemcacheService#getItemForPeek(Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_getItemForPeek_java_lang_Object_)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.ItemForPeek>` |   |

### getStatistics()

    public abstract Future<Stats> getStatistics()

See Also: [MemcacheService#getStatistics()](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_getStatistics__)

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Stats>` |   |

### increment(Object key, long delta)

    public abstract Future<Long> increment(Object key, long delta)

See Also: [MemcacheService#increment(Object, long)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_increment_java_lang_Object_long_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `delta` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>` |   |

### increment(Object key, long delta, Long initialValue)

    public abstract Future<Long> increment(Object key, long delta, Long initialValue)

See Also: [MemcacheService#increment(Object, long, Long)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_increment_java_lang_Object_long_java_lang_Long_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `delta` | `https://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html` |
| `initialValue` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html>` |   |

### put(Object key, Object value)

    public abstract Future<Void> put(Object key, Object value)

See Also: [MemcacheService#put(Object, Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_put_java_lang_Object_java_lang_Object_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `value` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html>` |   |

### put(Object key, Object value, Expiration expires)

    public abstract Future<Void> put(Object key, Object value, Expiration expires)

See Also: [MemcacheService#put(Object, Object, Expiration)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_put_java_lang_Object_java_lang_Object_com_google_appengine_api_memcache_Expiration_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `value` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `expires` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html>` |   |

### put(Object key, Object value, Expiration expires, MemcacheService.SetPolicy policy)

    public abstract Future<Boolean> put(Object key, Object value, Expiration expires, MemcacheService.SetPolicy policy)

See Also: [MemcacheService#put(Object, Object, Expiration, SetPolicy)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_put_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `value` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `expires` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |
| `policy` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.SetPolicy` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |

### putAll(Map\<?,?\> values)

    public abstract Future<Void> putAll(Map<?,?> values)

See Also: [MemcacheService#putAll(Map)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_putAll_java_util_Map______)

| **Parameter** ||
|---|---|
| **Name** | **Description** |
| `values` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<?,?>` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html>` |   |

### putAll(Map\<?,?\> values, Expiration expires)

    public abstract Future<Void> putAll(Map<?,?> values, Expiration expires)

See Also: [MemcacheService#putAll(Map, Expiration)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_putAll_java_util_Map______com_google_appengine_api_memcache_Expiration_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `values` | `https://docs.oracle.com/javase/8/docs/api/java/util/Map.html<?,?>` |
| `expires` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Void.html>` |   |

### putIfUntouched(Object key, MemcacheService.IdentifiableValue oldValue, Object newValue)

    public abstract Future<Boolean> putIfUntouched(Object key, MemcacheService.IdentifiableValue oldValue, Object newValue)

See Also: [MemcacheService#putIfUntouched(Object, IdentifiableValue, Object)](https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService#com_google_appengine_api_memcache_MemcacheService_putIfUntouched_)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `oldValue` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.IdentifiableValue` |
| `newValue` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |

### putIfUntouched(Object key, MemcacheService.IdentifiableValue oldValue, Object newValue, Expiration expires)

    public abstract Future<Boolean> putIfUntouched(Object key, MemcacheService.IdentifiableValue oldValue, Object newValue, Expiration expires)

See Also: MemcacheService#putIfUntouched(Object, IdentifiableValue, Object, Expiration)

| **Parameters** ||
|---|---|
| **Name** | **Description** |
| `key` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `oldValue` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.MemcacheService.IdentifiableValue` |
| `newValue` | `https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html` |
| `expires` | `https://docs.cloud.google.com/appengine/docs/standard/java-gen2/reference/services/bundled/latest/com.google.appengine.api.memcache.Expiration` |

| **Returns** ||
|---|---|
| **Type** | **Description** |
| `https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/Future.html<https://docs.oracle.com/javase/8/docs/api/java/lang/Boolean.html>` |   |