ClientCache (Ignite 2.8.0)

```
public interface ClientCache<K,V>
```
Thin client cache.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`void`	`clear()` Clears the contents of the cache.
`boolean`	`containsKey(K key)` Determines if the `ClientCache` contains an entry for the specified key.
`V`	`get(K key)` Gets an entry from the cache.
`Map<K,V>`	`getAll(Set<? extends K> keys)` Gets a collection of entries from the `ClientCache`, returning them as `Map` of the values associated with the set of keys requested.
`V`	`getAndPut(K key, V val)` Associates the specified value with the specified key in this cache, returning an existing value if one existed.
`V`	`getAndRemove(K key)` Atomically removes the entry for a key only if currently mapped to some value.
`V`	`getAndReplace(K key, V val)` Atomically replaces the value for a given key if and only if there is a value currently mapped by the key.
`ClientCacheConfiguration`	`getConfiguration()`
`String`	`getName()`
`void`	`put(K key, V val)` Associates the specified value with the specified key in the cache.
`void`	`putAll(Map<? extends K,? extends V> map)` Copies all of the entries from the specified map to the `ClientCache`.
`boolean`	`putIfAbsent(K key, V val)` Atomically associates the specified key with the given value if it is not already associated with a value.
`<R> QueryCursor<R>`	`query(Query<R> qry)` Queries cache.
`FieldsQueryCursor<List<?>>`	`query(SqlFieldsQuery qry)` Convenience method to execute `SqlFieldsQuery`.
`boolean`	`remove(K key)` Removes the mapping for a key from this cache if it is present.
`boolean`	`remove(K key, V oldVal)` Atomically removes the mapping for a key only if currently mapped to the given value.
`void`	`removeAll()` Removes all of the mappings from this cache.
`void`	`removeAll(Set<? extends K> keys)` Removes entries for the specified keys.
`boolean`	`replace(K key, V val)` Atomically replaces the entry for a key only if currently mapped to some value.
`boolean`	`replace(K key, V oldVal, V newVal)` Atomically replaces the entry for a key only if currently mapped to a given value.
`int`	`size(CachePeekMode... peekModes)` Gets the number of all entries cached across all nodes.
`<K1,V1> ClientCache<K1,V1>`	`withExpirePolicy(javax.cache.expiry.ExpiryPolicy expirePlc)` Returns cache with the specified expired policy set.
`<K1,V1> ClientCache<K1,V1>`	`withKeepBinary()` Returns cache that will operate with binary objects.

- Method Detail
  - get
```
V get(K key)
throws ClientException
```
    Gets an entry from the cache.
    
    Parameters:
    
    key - the key whose associated value is to be returned
    
    Returns:
    
    the element, or null, if it does not exist.
    
    Throws:
    
    NullPointerException - if the key is null.
    
    ClientException
  - put
```
void put(K key,
         V val)
  throws ClientException
```
    Associates the specified value with the specified key in the cache.
    If the ClientCache previously contained a mapping for the key, the old value is replaced by the specified value.
    
    Parameters:
    
    key - key with which the specified value is to be associated
    
    val - value to be associated with the specified key.
    
    Throws:
    
    NullPointerException - if key is null or if value is null.
    
    ClientException
  - containsKey
```
boolean containsKey(K key)
             throws ClientException
```
    Determines if the ClientCache contains an entry for the specified key.
    More formally, returns true if and only if this cache contains a mapping for a key k such that key.equals(k). (There can be at most one such mapping)
    
    Parameters:
    
    key - key whose presence in this cache is to be tested.
    
    Returns:
    
    true if this map contains a mapping for the specified key.
    
    Throws:
    
    ClientException
  - getName
```
String getName()
```
    Returns:
    
    The name of the cache.
  - getConfiguration
```
ClientCacheConfiguration getConfiguration()
                                   throws ClientException
```
    Returns:
    
    The cache configuration.
    
    Throws:
    
    ClientException
  - size
```
int size(CachePeekMode... peekModes)
  throws ClientException
```
    Gets the number of all entries cached across all nodes. By default, if peekModes value isn't provided, only size of primary copies across all nodes will be returned. This behavior is identical to calling this method with CachePeekMode.PRIMARY peek mode.
    NOTE: this operation is distributed and will query all participating nodes for their cache sizes.
    
    Parameters:
    
    peekModes - Optional peek modes. If not provided, then total cache size is returned.
    
    Throws:
    
    ClientException
  - getAll
```
Map<K,V> getAll(Set<? extends K> keys)
         throws ClientException
```
    Gets a collection of entries from the ClientCache, returning them as Map of the values associated with the set of keys requested.
    
    Parameters:
    
    keys - The keys whose associated values are to be returned.
    
    Returns:
    
    A map of entries that were found for the given keys. Keys not found in the cache are not in the returned map.
    
    Throws:
    
    ClientException
  - putAll
```
void putAll(Map<? extends K,? extends V> map)
     throws ClientException
```
    Copies all of the entries from the specified map to the ClientCache.
    The effect of this call is equivalent to that of calling put(k, v) on this cache once for each mapping from key k to value v in the specified map.
    The order in which the individual puts occur is undefined.
    The behavior of this operation is undefined if entries in the cache corresponding to entries in the map are modified or removed while this operation is in progress. or if map is modified while the operation is in progress.
    
    Parameters:
    
    map - Mappings to be stored in this cache.
    
    Throws:
    
    ClientException
  - replace
```
boolean replace(K key,
                V oldVal,
                V newVal)
         throws ClientException
```
    Atomically replaces the entry for a key only if currently mapped to a given value.
    This is equivalent to:
```
 if (cache.containsKey(key) && equals(cache.get(key), oldValue)) {
  cache.put(key, newValue);
 return true;
 } else {
  return false;
 }
 
```
    except that the action is performed atomically.
    Parameters:
    
    key - Key with which the specified value is associated.
    
    oldVal - Value expected to be associated with the specified key.
    
    newVal - Value to be associated with the specified key.
    
    Returns:
    
    true if the value was replaced
    
    Throws:
    
    ClientException
  - replace
```
boolean replace(K key,
                V val)
         throws ClientException
```
    Atomically replaces the entry for a key only if currently mapped to some value.
    This is equivalent to
```
 if (cache.containsKey(key)) {
   cache.put(key, value);
   return true;
 } else {
   return false;
 }
```
    except that the action is performed atomically.
    Parameters:
    
    key - The key with which the specified value is associated.
    
    val - The value to be associated with the specified key.
    
    Returns:
    
    true if the value was replaced.
    
    Throws:
    
    ClientException
  - remove
```
boolean remove(K key)
        throws ClientException
```
    Removes the mapping for a key from this cache if it is present.
    More formally, if this cache contains a mapping from key k to value v such that (key==null ? k==null : key.equals(k)), that mapping is removed. (The cache can contain at most one such mapping.)
    Returns true if this cache previously associated the key, or false if the cache contained no mapping for the key.
    The cache will not contain a mapping for the specified key once the call returns.
    
    Parameters:
    
    key - Key whose mapping is to be removed from the cache.
    
    Returns:
    
    false if there was no matching key.
    
    Throws:
    
    ClientException
  - remove
```
boolean remove(K key,
               V oldVal)
        throws ClientException
```
    Atomically removes the mapping for a key only if currently mapped to the given value.
    This is equivalent to:
```
 if (cache.containsKey(key) && equals(cache.get(key), oldValue) {
   cache.remove(key);
   return true;
 } else {
   return false;
 }
 
```
    except that the action is performed atomically.
    Parameters:
    
    key - Key whose mapping is to be removed from the cache.
    
    oldVal - Value expected to be associated with the specified key.
    
    Returns:
    
    false if there was no matching key.
    
    Throws:
    
    ClientException
  - removeAll
```
void removeAll(Set<? extends K> keys)
        throws ClientException
```
    Removes entries for the specified keys.
    The order in which the individual entries are removed is undefined.
    
    Parameters:
    
    keys - The keys to remove.
    
    Throws:
    
    ClientException
  - removeAll
```
void removeAll()
        throws ClientException
```
    Removes all of the mappings from this cache.
    The order that the individual entries are removed is undefined.
    
    Throws:
    
    ClientException
  - getAndPut
```
V getAndPut(K key,
            V val)
     throws ClientException
```
    Associates the specified value with the specified key in this cache, returning an existing value if one existed.
    If the cache previously contained a mapping for the key, the old value is replaced by the specified value. (A cache c is said to contain a mapping for a key k if and only if c.containsKey(k) would return true.)
    The previous value is returned, or null if there was no value associated with the key previously.
    
    Parameters:
    
    key - Key with which the specified value is to be associated.
    
    val - Value to be associated with the specified key.
    
    Returns:
    
    The value associated with the key at the start of the operation or null if none was associated.
    
    Throws:
    
    ClientException
  - getAndRemove
```
V getAndRemove(K key)
        throws ClientException
```
    Atomically removes the entry for a key only if currently mapped to some value.
    This is equivalent to:
```
 if (cache.containsKey(key)) {
   V oldValue = cache.get(key);
   cache.remove(key);
   return oldValue;
 } else {
   return null;
 }
 
```
    except that the action is performed atomically.
    Parameters:
    
    key - Key with which the specified value is associated.
    
    Returns:
    
    The value if one existed or null if no mapping existed for this key.
    
    Throws:
    
    ClientException
  - getAndReplace
```
V getAndReplace(K key,
                V val)
         throws ClientException
```
    Atomically replaces the value for a given key if and only if there is a value currently mapped by the key.
    This is equivalent to
```
 if (cache.containsKey(key)) {
   V oldValue = cache.get(key);
   cache.put(key, value);
   return oldValue;
 } else {
   return null;
 }
 
```
    except that the action is performed atomically.
    Parameters:
    
    key - Key with which the specified value is associated.
    
    val - Value to be associated with the specified key.
    
    Returns:
    
    The previous value associated with the specified key, or null if there was no mapping for the key.
    
    Throws:
    
    ClientException
  - putIfAbsent
```
boolean putIfAbsent(K key,
                    V val)
             throws ClientException
```
    Atomically associates the specified key with the given value if it is not already associated with a value.
    This is equivalent to:
```
 if (!cache.containsKey(key)) {}
   cache.put(key, value);
   return true;
 } else {
   return false;
 }
 
```
    except that the action is performed atomically.
    Parameters:
    
    key - Key with which the specified value is to be associated.
    
    val - Value to be associated with the specified key.
    
    Returns:
    
    true if a value was set.
    
    Throws:
    
    ClientException
  - clear
```
void clear()
    throws ClientException
```
    Clears the contents of the cache.
    
    Throws:
    
    ClientException
  - withKeepBinary
```
<K1,V1> ClientCache<K1,V1> withKeepBinary()
```
    Returns cache that will operate with binary objects.
    Cache returned by this method will not be forced to deserialize binary objects, so keys and values will be returned from cache API methods without changes. Therefore, signature of the cache can contain only following types:
    - org.apache.ignite.binary.BinaryObject for binary classes
    - All primitives (byte, int, ...) and there boxed versions (Byte, Integer, ...)
    - Arrays of primitives (byte[], int[], ...)
    - String and array of Strings
    - UUID and array of UUIDs
    - Date and array of Dates
    - Timestamp and array of Timestamps
    - Enums and array of enums
    - Maps, collections and array of objects (but objects inside them will still be converted if they are binary)
    For example, if you use Integer as a key and Value class as a value (which will be stored in binary format), you should acquire following projection to avoid deserialization:
```
 CacheClient prj = cache.withKeepBinary();

 // Value is not deserialized and returned in binary format.
 BinaryObject po = prj.get(1);
 
```
    Note that this method makes sense only if cache is working in binary mode if default marshaller is used. If not, this method is no-op and will return current cache.
    Returns:
    
    New cache instance for binary objects.
  - withExpirePolicy
```
<K1,V1> ClientCache<K1,V1> withExpirePolicy(javax.cache.expiry.ExpiryPolicy expirePlc)
```
    Returns cache with the specified expired policy set. This policy will be used for each operation invoked on the returned cache.
    
    Returns:
    
    Cache instance with the specified expiry policy set.
  - query
```
<R> QueryCursor<R> query(Query<R> qry)
```
    Queries cache. Supports ScanQuery and SqlFieldsQuery.
    
    Parameters:
    
    qry - Query.
    
    Returns:
    
    Cursor.
  - query
```
FieldsQueryCursor<List<?>> query(SqlFieldsQuery qry)
```
    Convenience method to execute SqlFieldsQuery.
    
    Parameters:
    
    qry - Query.
    
    Returns:
    
    Cursor.

Interface ClientCache<K,V>

Method Summary

Method Detail

get

put

containsKey

getName

getConfiguration

size

getAll

putAll

replace

replace

remove

remove

removeAll

removeAll

getAndPut

getAndRemove

getAndReplace

putIfAbsent

clear

withKeepBinary

withExpirePolicy

query

query