Trait ethcore::db::Writable

pub trait Writable {
    fn write<T, R>(
        &mut self, 
        col: Option<u32>, 
        key: &Key<T, Target = R>, 
        value: &T
    )
    where
        T: Encodable,
        R: Deref<Target = [u8]>;
    fn delete<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>)
    where
        T: Encodable,
        R: Deref<Target = [u8]>;

    fn write_with_cache<K, T, R>(
        &mut self, 
        col: Option<u32>, 
        cache: &mut Cache<K, T>, 
        key: K, 
        value: T, 
        policy: CacheUpdatePolicy
    )
    where
        K: Key<T, Target = R> + Hash + Eq,
        T: Encodable,
        R: Deref<Target = [u8]>,
    { ... }
    fn extend_with_cache<K, T, R>(
        &mut self, 
        col: Option<u32>, 
        cache: &mut Cache<K, T>, 
        values: HashMap<K, T>, 
        policy: CacheUpdatePolicy
    )
    where
        K: Key<T, Target = R> + Hash + Eq,
        T: Encodable,
        R: Deref<Target = [u8]>,
    { ... }
    fn extend_with_option_cache<K, T, R>(
        &mut self, 
        col: Option<u32>, 
        cache: &mut Cache<K, Option<T>>, 
        values: HashMap<K, Option<T>>, 
        policy: CacheUpdatePolicy
    )
    where
        K: Key<T, Target = R> + Hash + Eq,
        T: Encodable,
        R: Deref<Target = [u8]>,
    { ... }
}

Should be used to write value into database.

Required Methods

fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where
    T: Encodable,
    R: Deref<Target = [u8]>, 

Writes the value into the database.

fn delete<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>) where
    T: Encodable,
    R: Deref<Target = [u8]>, 

Deletes key from the databse.

Provided Methods

fn write_with_cache<K, T, R>(
    &mut self,
    col: Option<u32>,
    cache: &mut Cache<K, T>,
    key: K,
    value: T,
    policy: CacheUpdatePolicy
) where
    K: Key<T, Target = R> + Hash + Eq,
    T: Encodable,
    R: Deref<Target = [u8]>, 

Writes the value into the database and updates the cache.

fn extend_with_cache<K, T, R>(
    &mut self,
    col: Option<u32>,
    cache: &mut Cache<K, T>,
    values: HashMap<K, T>,
    policy: CacheUpdatePolicy
) where
    K: Key<T, Target = R> + Hash + Eq,
    T: Encodable,
    R: Deref<Target = [u8]>, 

Writes the values into the database and updates the cache.

fn extend_with_option_cache<K, T, R>(
    &mut self,
    col: Option<u32>,
    cache: &mut Cache<K, Option<T>>,
    values: HashMap<K, Option<T>>,
    policy: CacheUpdatePolicy
) where
    K: Key<T, Target = R> + Hash + Eq,
    T: Encodable,
    R: Deref<Target = [u8]>, 

Writes and removes the values into the database and updates the cache.

Implementations on Foreign Types

impl Writable for DBTransaction

fn write<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>, value: &T) where     T: Encodable,     R: Deref<Target = [u8]>,

fn delete<T, R>(&mut self, col: Option<u32>, key: &Key<T, Target = R>) where     T: Encodable,     R: Deref<Target = [u8]>,

fn write_with_cache<K, T, R>(     &mut self,     col: Option<u32>,     cache: &mut Cache<K, T>,     key: K,     value: T,     policy: CacheUpdatePolicy ) where     K: Key<T, Target = R> + Hash + Eq,     T: Encodable,     R: Deref<Target = [u8]>,

fn extend_with_cache<K, T, R>(     &mut self,     col: Option<u32>,     cache: &mut Cache<K, T>,     values: HashMap<K, T>,     policy: CacheUpdatePolicy ) where     K: Key<T, Target = R> + Hash + Eq,     T: Encodable,     R: Deref<Target = [u8]>,

fn extend_with_option_cache<K, T, R>(     &mut self,     col: Option<u32>,     cache: &mut Cache<K, Option<T>>,     values: HashMap<K, Option<T>>,     policy: CacheUpdatePolicy ) where     K: Key<T, Target = R> + Hash + Eq,     T: Encodable,     R: Deref<Target = [u8]>,

Implementors