Class CacheLinqExtensions

Extensions methods for ICache<TK, TV>.

Inheritance

System.Object

CacheLinqExtensions

Namespace: Apache.Ignite.Linq

Assembly: Apache.Ignite.Linq.dll

Syntax

public static class CacheLinqExtensions : object

Methods

AsCacheQueryable<TKey, TValue>(ICache<TKey, TValue>)

Gets an instance over this cache.

Resulting query will be translated to cache SQL query and executed over the cache instance via Query(SqlFieldsQuery).

Result of this method (and subsequent query) can be cast to ICacheQueryable for introspection, or converted with ToCacheQueryable<T>(IQueryable<T>) extension method.

Declaration

public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>(this ICache<TKey, TValue> cache)

Parameters

Type	Name	Description
ICache<TKey, TValue>	cache	The cache.

Returns

Type	Description
IQueryable<ICacheEntry<TKey, TValue>>	instance over this cache.

Type Parameters

Name	Description
TKey	The type of the key.
TValue	The type of the value.

AsCacheQueryable<TKey, TValue>(ICache<TKey, TValue>, QueryOptions)

Gets an instance over this cache.

Resulting query will be translated to cache SQL query and executed over the cache instance via Query(SqlFieldsQuery). depending on requested result.

Result of this method (and subsequent query) can be cast to ICacheQueryable for introspection.

Declaration

public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>(this ICache<TKey, TValue> cache, QueryOptions queryOptions)

Parameters

Type	Name	Description
ICache<TKey, TValue>	cache	The cache.
QueryOptions	queryOptions	The query options.

Returns

Type	Description
IQueryable<ICacheEntry<TKey, TValue>>	instance over this cache.

Type Parameters

Name	Description
TKey	The type of the key.
TValue	The type of the value.

AsCacheQueryable<TKey, TValue>(ICache<TKey, TValue>, Boolean)

Gets an instance over this cache.

Resulting query will be translated to cache SQL query and executed over the cache instance via Query(SqlFieldsQuery). depending on requested result.

Result of this method (and subsequent query) can be cast to ICacheQueryable for introspection.

Declaration

public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>(this ICache<TKey, TValue> cache, bool local)

Parameters

Type	Name	Description
ICache<TKey, TValue>	cache	The cache.
System.Boolean	local	Local flag. When set query will be executed only on local node, so only local entries will be returned as query result.

Returns

Type	Description
IQueryable<ICacheEntry<TKey, TValue>>	instance over this cache.

Type Parameters

Name	Description
TKey	The type of the key.
TValue	The type of the value.

AsCacheQueryable<TKey, TValue>(ICache<TKey, TValue>, Boolean, String)

Gets an instance over this cache.

Resulting query will be translated to cache SQL query and executed over the cache instance via Query(SqlFieldsQuery). depending on requested result.

Result of this method (and subsequent query) can be cast to ICacheQueryable for introspection.

Declaration

public static IQueryable<ICacheEntry<TKey, TValue>> AsCacheQueryable<TKey, TValue>(this ICache<TKey, TValue> cache, bool local, string tableName)

Parameters

Type	Name	Description
ICache<TKey, TValue>	cache	The cache.
System.Boolean	local	Local flag. When set query will be executed only on local node, so only local entries will be returned as query result.
System.String	tableName	Name of the table. Table name is equal to short class name of a cache value. When a cache has only one type of values, or only one QueryEntity defined, table name will be inferred and can be omitted.

Returns

Type	Description
IQueryable<ICacheEntry<TKey, TValue>>	instance over this cache.

Type Parameters

Name	Description
TKey	The type of the key.
TValue	The type of the value.

RemoveAll<TKey, TValue>(IQueryable<ICacheEntry<TKey, TValue>>)

Removes all rows that are matched by the specified query.

This method results in "DELETE FROM" distributed SQL query, performing bulk delete (as opposed to fetching all rows locally).

Declaration

public static int RemoveAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query)

Parameters

Type	Name	Description
IQueryable<ICacheEntry<TKey, TValue>>	query	The query.

Returns

Type	Description
System.Int32	Affected row count.

Type Parameters

Name	Description
TKey	Key type.
TValue	Value type.

RemoveAll<TKey, TValue>(IQueryable<ICacheEntry<TKey, TValue>>, Expression<Func<ICacheEntry<TKey, TValue>, Boolean>>)

Deletes all rows that are matched by the specified query.

This method results in "DELETE FROM" distributed SQL query, performing bulk delete (as opposed to fetching all rows locally).

Declaration

public static int RemoveAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query, Expression<Func<ICacheEntry<TKey, TValue>, bool>> predicate)

Parameters

Type	Name	Description
IQueryable<ICacheEntry<TKey, TValue>>	query	The query.
Expression<Func<ICacheEntry<TKey, TValue>, System.Boolean>>	predicate	The predicate.

Returns

Type	Description
System.Int32	Affected row count.

Type Parameters

Name	Description
TKey	Key type.
TValue	Value type.

ToCacheQueryable<T>(IQueryable<T>)

Casts this query to ICacheQueryable.

Declaration

public static ICacheQueryable ToCacheQueryable<T>(this IQueryable<T> query)

Parameters

Type	Name	Description
IQueryable<T>	query

Returns

Type	Description
ICacheQueryable

Type Parameters

Name	Description
T

UpdateAll<TKey, TValue>(IQueryable<ICacheEntry<TKey, TValue>>, Expression<Func<IUpdateDescriptor<TKey, TValue>, IUpdateDescriptor<TKey, TValue>>>)

Updates all rows that are matched by the specified query.

This method results in "UPDATE" distributed SQL query, performing bulk update (as opposed to fetching all rows locally).

Declaration

public static int UpdateAll<TKey, TValue>(this IQueryable<ICacheEntry<TKey, TValue>> query, Expression<Func<IUpdateDescriptor<TKey, TValue>, IUpdateDescriptor<TKey, TValue>>> updateDescription)

Parameters

Type	Name	Description
IQueryable<ICacheEntry<TKey, TValue>>	query	The query.
Expression<Func<IUpdateDescriptor<TKey, TValue>, IUpdateDescriptor<TKey, TValue>>>	updateDescription	The update description.

Returns

Type	Description
System.Int32	Affected row count.

Type Parameters

Name	Description
TKey	Key type.
TValue	Value type.