Move and rename MemStore to mempool module

src/mempool.rs

@@ -1,15 +1,61 @@
 use bitcoin::blockdata::transaction::Transaction;
 use bitcoin::util::hash::Sha256dHash;
-use daemon::{Daemon, MempoolEntry};
-
+use std::collections::BTreeMap;
 use std::collections::{HashMap, HashSet};
 use std::iter::FromIterator;
+use std::ops::Bound;
+use std::sync::RwLock;
 use std::time::{Duration, Instant};
 
+use daemon::{Daemon, MempoolEntry};
+use index::index_transaction;
+use store::{Row, Store};
+use util::Bytes;
+
 error_chain!{}
 
 const VSIZE_BIN_WIDTH: u32 = 100_000; // in vbytes
 
+struct MempoolStore {
+    map: RwLock<BTreeMap<Bytes, Bytes>>,
+}
+
+impl MempoolStore {
+    pub fn new() -> MempoolStore {
+        MempoolStore {
+            map: RwLock::new(BTreeMap::new()),
+        }
+    }
+}
+
+impl Store for MempoolStore {
+    fn get(&self, key: &[u8]) -> Option<Bytes> {
+        self.map.read().unwrap().get(key).map(|v| v.to_vec())
+    }
+    fn scan(&self, prefix: &[u8]) -> Vec<Row> {
+        let map = self.map.read().unwrap();
+        let range = map.range((Bound::Included(prefix.to_vec()), Bound::Unbounded));
+        let mut rows = Vec::new();
+        for (key, value) in range {
+            if !key.starts_with(prefix) {
+                break;
+            }
+            rows.push(Row {
+                key: key.to_vec(),
+                value: value.to_vec(),
+            });
+        }
+        rows
+    }
+    fn persist(&self, rows: Vec<Row>) {
+        let mut map = self.map.write().unwrap();
+        for row in rows {
+            let (key, value) = row.into_pair();
+            map.insert(key, value);
+        }
+    }
+}
+
 pub struct Stats {
     tx: Transaction,
     entry: MempoolEntry,
@@ -77,7 +123,7 @@ impl Tracker {
                 }
             };
             trace!("new tx: {}, {:.3}", txid, entry.fee_per_vbyte(),);
-            self.add(txid, Stats::new(tx, entry));
+            self.add(txid, tx, entry);
         }
         for txid in old_txids.difference(&new_txids) {
             self.remove(txid);
@@ -90,13 +136,23 @@ impl Tracker {
         Ok(())
     }
 
-    fn add(&mut self, txid: &Sha256dHash, stats: Stats) {
-        self.stats.insert(*txid, stats);
+    fn add(&mut self, txid: &Sha256dHash, tx: Transaction, entry: MempoolEntry) {
+        self.stats.insert(*txid, Stats { tx, entry });
     }
 
     fn remove(&mut self, txid: &Sha256dHash) {
         self.stats.remove(txid);
     }
+
+    pub fn build_index(&self) -> Box<Store> {
+        let mut rows = Vec::new();
+        for stats in self.stats.values() {
+            index_transaction(&stats.tx, 0, &mut rows)
+        }
+        let store = MempoolStore::new();
+        store.persist(rows);
+        Box::new(store)
+    }
 }
 
 trait InSeconds {

src/store.rs

@@ -1,9 +1,6 @@
 use bitcoin::blockdata::block::BlockHeader;
 use bitcoin::network::serialize::deserialize;
 use rocksdb;
-use std::collections::BTreeMap;
-use std::ops::Bound;
-use std::sync::RwLock;
 
 use util::Bytes;
 
@@ -13,7 +10,7 @@ pub struct Row {
 }
 
 impl Row {
-    fn into_pair(self) -> (Bytes, Bytes) {
+    pub fn into_pair(self) -> (Bytes, Bytes) {
         (self.key, self.value)
     }
 }
@@ -103,48 +100,3 @@ impl Store for DBStore {
         self.db.write_opt(batch, &opts).unwrap();
     }
 }
-
-pub struct MemStore {
-    map: RwLock<BTreeMap<Bytes, Bytes>>,
-}
-
-impl MemStore {
-    pub fn new() -> MemStore {
-        MemStore {
-            map: RwLock::new(BTreeMap::new()),
-        }
-    }
-
-    pub fn remove(&self, key: &Bytes) -> Option<Bytes> {
-        let mut map = self.map.write().unwrap();
-        map.remove(key)
-    }
-}
-
-impl Store for MemStore {
-    fn get(&self, key: &[u8]) -> Option<Bytes> {
-        self.map.read().unwrap().get(key).map(|v| v.to_vec())
-    }
-    fn scan(&self, prefix: &[u8]) -> Vec<Row> {
-        let map = self.map.read().unwrap();
-        let range = map.range((Bound::Included(prefix.to_vec()), Bound::Unbounded));
-        let mut rows = Vec::new();
-        for (key, value) in range {
-            if !key.starts_with(prefix) {
-                break;
-            }
-            rows.push(Row {
-                key: key.to_vec(),
-                value: value.to_vec(),
-            });
-        }
-        rows
-    }
-    fn persist(&self, rows: Vec<Row>) {
-        let mut map = self.map.write().unwrap();
-        for row in rows {
-            let (key, value) = row.into_pair();
-            map.insert(key, value);
-        }
-    }
-}