7370776af1
* use bloomchain crate in blockchain module. remove obsole chainfilter submodule * update database version to 6.0 * removed redundant line * simple db migration * make migration slightly more functional * bloomchain migration * migration version is just a single unsigned integer * updated migration v6 * parity migration * db migration * removed hardcoded migration dir * replace ptr::copy with clone_from_slice, removed potential endianess problem from trace/db.rs * removed superfluous line * blockchains log blooms config is not exposed any more
43 lines
1.4 KiB
Rust
43 lines
1.4 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! DB Migration module.
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mod db_impl;
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mod manager;
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#[cfg(test)]
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mod tests;
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pub use self::manager::{Error, Config, Manager};
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pub use self::db_impl::MigrationIterator;
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use std::collections::BTreeMap;
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/// Single migration.
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pub trait Migration: 'static {
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/// Version of database after the migration.
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fn version(&self) -> u32;
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/// Should migrate existing object to new database.
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/// Returns `None` if the object does not exist in new version of database.
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fn simple_migrate(&self, key: Vec<u8>, value: Vec<u8>) -> Option<(Vec<u8>, Vec<u8>)>;
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}
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/// Migration destination.
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pub trait Destination {
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/// Called on destination to commit batch of migrated entries.
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fn commit(&mut self, batch: BTreeMap<Vec<u8>, Vec<u8>>) -> Result<(), Error>;
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}
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