75 lines
2.4 KiB
Rust
75 lines
2.4 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity Ethereum.
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// Parity Ethereum 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 Ethereum 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 Ethereum. If not, see <http://www.gnu.org/licenses/>.
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use std::collections::HashMap;
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use parking_lot::RwLock;
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use itertools;
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use ethkey::Address;
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use {SafeAccount, Error};
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use super::KeyDirectory;
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/// Accounts in-memory storage.
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#[derive(Default)]
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pub struct MemoryDirectory {
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accounts: RwLock<HashMap<Address, Vec<SafeAccount>>>,
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}
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impl KeyDirectory for MemoryDirectory {
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fn load(&self) -> Result<Vec<SafeAccount>, Error> {
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Ok(itertools::Itertools::flatten(self.accounts.read().values().cloned()).collect())
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}
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fn update(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
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let mut lock = self.accounts.write();
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let accounts = lock.entry(account.address.clone()).or_insert_with(Vec::new);
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// If the filename is the same we just need to replace the entry
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accounts.retain(|acc| acc.filename != account.filename);
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accounts.push(account.clone());
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Ok(account)
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}
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fn insert(&self, account: SafeAccount) -> Result<SafeAccount, Error> {
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let mut lock = self.accounts.write();
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let accounts = lock.entry(account.address.clone()).or_insert_with(Vec::new);
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accounts.push(account.clone());
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Ok(account)
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}
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fn remove(&self, account: &SafeAccount) -> Result<(), Error> {
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let mut accounts = self.accounts.write();
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let is_empty = if let Some(accounts) = accounts.get_mut(&account.address) {
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if let Some(position) = accounts.iter().position(|acc| acc == account) {
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accounts.remove(position);
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}
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accounts.is_empty()
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} else {
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false
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};
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if is_empty {
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accounts.remove(&account.address);
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}
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Ok(())
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}
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fn unique_repr(&self) -> Result<u64, Error> {
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let mut val = 0u64;
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let accounts = self.accounts.read();
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for acc in accounts.keys() { val = val ^ acc.low_u64() }
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Ok(val)
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}
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}
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