1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146
use std::collections::HashMap; use std::sync::Arc; use std::mem::replace; use parking_lot::RwLock; use hash::H256; use bytes::Bytes; use ser::List; use chain::{Transaction as ChainTransaction, BlockHeader}; use kv::{Transaction, Key, KeyState, Operation, Value, KeyValueDatabase, KeyValue}; use storage::{TransactionMeta}; #[derive(Default, Debug)] struct InnerDatabase { meta: HashMap<&'static str, KeyState<Bytes>>, block_hash: HashMap<u32, KeyState<H256>>, block_header: HashMap<H256, KeyState<BlockHeader>>, block_transactions: HashMap<H256, KeyState<List<H256>>>, transaction: HashMap<H256, KeyState<ChainTransaction>>, transaction_meta: HashMap<H256, KeyState<TransactionMeta>>, block_number: HashMap<H256, KeyState<u32>>, configuration: HashMap<&'static str, KeyState<Bytes>>, } #[derive(Default, Debug)] pub struct MemoryDatabase { db: RwLock<InnerDatabase>, } impl MemoryDatabase { pub fn drain_transaction(&self) -> Transaction { let mut db = self.db.write(); let meta = replace(&mut db.meta, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::Meta, Key::Meta)); let block_hash = replace(&mut db.block_hash, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::BlockHash, Key::BlockHash)); let block_header = replace(&mut db.block_header, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::BlockHeader, Key::BlockHeader)); let block_transactions = replace(&mut db.block_transactions, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::BlockTransactions, Key::BlockTransactions)); let transaction = replace(&mut db.transaction, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::Transaction, Key::Transaction)); let transaction_meta = replace(&mut db.transaction_meta, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::TransactionMeta, Key::TransactionMeta)); let block_number = replace(&mut db.block_number, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::BlockNumber, Key::BlockNumber)); let configuration = replace(&mut db.configuration, HashMap::default()).into_iter() .flat_map(|(key, state)| state.into_operation(key, KeyValue::Configuration, Key::Configuration)); Transaction { operations: meta .chain(block_hash) .chain(block_header) .chain(block_transactions) .chain(transaction) .chain(transaction_meta) .chain(block_number) .chain(configuration) .collect() } } } impl KeyValueDatabase for MemoryDatabase { fn write(&self, tx: Transaction) -> Result<(), String> { let mut db = self.db.write(); for op in tx.operations.into_iter() { match op { Operation::Insert(insert) => match insert { KeyValue::Meta(key, value) => { db.meta.insert(key, KeyState::Insert(value)); }, KeyValue::BlockHash(key, value) => { db.block_hash.insert(key, KeyState::Insert(value)); }, KeyValue::BlockHeader(key, value) => { db.block_header.insert(key, KeyState::Insert(value)); }, KeyValue::BlockTransactions(key, value) => { db.block_transactions.insert(key, KeyState::Insert(value)); }, KeyValue::Transaction(key, value) => { db.transaction.insert(key, KeyState::Insert(value)); }, KeyValue::TransactionMeta(key, value) => { db.transaction_meta.insert(key, KeyState::Insert(value)); }, KeyValue::BlockNumber(key, value) => { db.block_number.insert(key, KeyState::Insert(value)); }, KeyValue::Configuration(key, value) => { db.configuration.insert(key, KeyState::Insert(value)); }, }, Operation::Delete(delete) => match delete { Key::Meta(key) => { db.meta.insert(key, KeyState::Delete); } Key::BlockHash(key) => { db.block_hash.insert(key, KeyState::Delete); } Key::BlockHeader(key) => { db.block_header.insert(key, KeyState::Delete); } Key::BlockTransactions(key) => { db.block_transactions.insert(key, KeyState::Delete); } Key::Transaction(key) => { db.transaction.insert(key, KeyState::Delete); } Key::TransactionMeta(key) => { db.transaction_meta.insert(key, KeyState::Delete); } Key::BlockNumber(key) => { db.block_number.insert(key, KeyState::Delete); } Key::Configuration(key) => { db.configuration.insert(key, KeyState::Delete); } } } } Ok(()) } fn get(&self, key: &Key) -> Result<KeyState<Value>, String> { let db = self.db.read(); let result = match *key { Key::Meta(ref key) => db.meta.get(key).cloned().unwrap_or_default().map(Value::Meta), Key::BlockHash(ref key) => db.block_hash.get(key).cloned().unwrap_or_default().map(Value::BlockHash), Key::BlockHeader(ref key) => db.block_header.get(key).cloned().unwrap_or_default().map(Value::BlockHeader), Key::BlockTransactions(ref key) => db.block_transactions.get(key).cloned().unwrap_or_default().map(Value::BlockTransactions), Key::Transaction(ref key) => db.transaction.get(key).cloned().unwrap_or_default().map(Value::Transaction), Key::TransactionMeta(ref key) => db.transaction_meta.get(key).cloned().unwrap_or_default().map(Value::TransactionMeta), Key::BlockNumber(ref key) => db.block_number.get(key).cloned().unwrap_or_default().map(Value::BlockNumber), Key::Configuration(ref key) => db.configuration.get(key).cloned().unwrap_or_default().map(Value::Configuration), }; Ok(result) } } #[derive(Debug)] pub struct SharedMemoryDatabase { db: Arc<MemoryDatabase>, } impl Default for SharedMemoryDatabase { fn default() -> Self { SharedMemoryDatabase { db: Arc::default(), } } } impl Clone for SharedMemoryDatabase { fn clone(&self) -> Self { SharedMemoryDatabase { db: self.db.clone(), } } } impl KeyValueDatabase for SharedMemoryDatabase { fn write(&self, tx: Transaction) -> Result<(), String> { self.db.write(tx) } fn get(&self, key: &Key) -> Result<KeyState<Value>, String> { self.db.get(key) } }