Trait engine_rocks::raw::TablePropertiesCollector

pub trait TablePropertiesCollector {
    pub fn add(
        &mut self, 
        key: &[u8], 
        value: &[u8], 
        entry_type: DBEntryType, 
        seq: u64, 
        file_size: u64
    );
    pub fn finish(
        &mut self
    ) -> HashMap<Vec<u8, Global>, Vec<u8, Global>, RandomState>;
}

TablePropertiesCollector provides the mechanism for users to collect their own properties that they are interested in. This class is essentially a collection of callback functions that will be invoked during table building. It is constructed with TablePropertiesCollectorFactory. The methods don’t need to be thread-safe, as we will create exactly one TablePropertiesCollector object per table and then call it sequentially

Required methods

pub fn add(
    &mut self,
    key: &[u8],
    value: &[u8],
    entry_type: DBEntryType,
    seq: u64,
    file_size: u64
)

Will be called when a new key/value pair is inserted into the table.

pub fn finish(
    &mut self
) -> HashMap<Vec<u8, Global>, Vec<u8, Global>, RandomState>

Will be called when a table has already been built and is ready for writing the properties block.

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Implementors

impl TablePropertiesCollector for MvccPropertiesCollector

fn add(
    &mut self,
    key: &[u8],
    value: &[u8],
    entry_type: DBEntryType,
    _: u64,
    _: u64
)

fn finish(&mut self) -> HashMap<Vec<u8>, Vec<u8>>

impl TablePropertiesCollector for RangePropertiesCollector

fn add(
    &mut self,
    key: &[u8],
    value: &[u8],
    entry_type: DBEntryType,
    _: u64,
    _: u64
)

fn finish(&mut self) -> HashMap<Vec<u8>, Vec<u8>>

impl TablePropertiesCollector for TtlPropertiesCollector

fn add(
    &mut self,
    key: &[u8],
    value: &[u8],
    entry_type: DBEntryType,
    _: u64,
    _: u64
)

fn finish(&mut self) -> HashMap<Vec<u8>, Vec<u8>>

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