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* database: doc fixes * blockchain: doc fixes * database: fix doc test * database: readme fixes * blockchain: ops fix * blockchain: readme fix
68 lines
2.5 KiB
Rust
68 lines
2.5 KiB
Rust
//! General free functions (related to the database).
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//---------------------------------------------------------------------------------------------------- Import
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use cuprate_database::{ConcreteEnv, Env, EnvInner, InitError, RuntimeError, TxRw};
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use crate::{config::Config, tables::OpenTables};
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//---------------------------------------------------------------------------------------------------- Free functions
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/// Open the blockchain database using the passed [`Config`].
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///
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/// This calls [`cuprate_database::Env::open`] and prepares the
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/// database to be ready for blockchain-related usage, e.g.
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/// table creation, table sort order, etc.
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///
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/// All tables found in [`crate::tables`] will be
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/// ready for usage in the returned [`ConcreteEnv`].
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///
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/// # Errors
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/// This will error if:
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/// - The database file could not be opened
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/// - A write transaction could not be opened
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/// - A table could not be created/opened
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#[cold]
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#[inline(never)] // only called once
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pub fn open(config: Config) -> Result<ConcreteEnv, InitError> {
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// Attempt to open the database environment.
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let env = <ConcreteEnv as Env>::open(config.db_config)?;
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/// Convert runtime errors to init errors.
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///
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/// INVARIANT:
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/// `cuprate_database`'s functions mostly return the former
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/// so we must convert them. We have knowledge of which errors
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/// makes sense in this functions context so we panic on
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/// unexpected ones.
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fn runtime_to_init_error(runtime: RuntimeError) -> InitError {
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match runtime {
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RuntimeError::Io(io_error) => io_error.into(),
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// These errors shouldn't be happening here.
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RuntimeError::KeyExists
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| RuntimeError::KeyNotFound
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| RuntimeError::ResizeNeeded
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| RuntimeError::TableNotFound => unreachable!(),
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}
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}
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// INVARIANT: We must ensure that all tables are created,
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// `cuprate_database` has no way of knowing _which_ tables
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// we want since it is agnostic, so we are responsible for this.
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{
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let env_inner = env.env_inner();
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let tx_rw = env_inner.tx_rw().map_err(runtime_to_init_error)?;
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// Create all tables.
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OpenTables::create_tables(&env_inner, &tx_rw).map_err(runtime_to_init_error)?;
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TxRw::commit(tx_rw).map_err(runtime_to_init_error)?;
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}
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Ok(env)
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}
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//---------------------------------------------------------------------------------------------------- Tests
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#[cfg(test)]
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mod test {
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// use super::*;
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}
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