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Revert "Removed transaction caching. Can be reintroduced later."

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This reverts commit 9804eccbf0.
This commit is contained in:
CalDescent 2022-02-09 19:46:20 +00:00
parent b7b66f6cba
commit 61f58173cb
1 changed files with 23 additions and 1 deletions
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24
src/main/java/org/qortal/crosschain/Bitcoiny.java
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@ -33,6 +33,7 @@ import org.qortal.utils.Amounts;
import org.qortal.utils.BitTwiddling;
import com.google.common.hash.HashCode;
import org.qortal.utils.NTP;
/** Bitcoin-like (Bitcoin, Litecoin, etc.) support */
public abstract class Bitcoiny implements ForeignBlockchain {
@ -47,6 +48,12 @@ public abstract class Bitcoiny implements ForeignBlockchain {
protected final NetworkParameters params;
/** Cache recent transactions to speed up subsequent lookups */
protected List<SimpleTransaction> transactionsCache;
protected Long transactionsCacheTimestamp;
protected String transactionsCacheXpub;
protected static long TRANSACTIONS_CACHE_TIMEOUT = 2 * 60 * 1000L; // 2 minutes
/** Keys that have been previously marked as fully spent,<br>
* i.e. keys with transactions but with no unspent outputs. */
protected final Set<ECKey> spentKeys = Collections.synchronizedSet(new HashSet<>());
@ -343,6 +350,17 @@ public abstract class Bitcoiny implements ForeignBlockchain {
public List<SimpleTransaction> getWalletTransactions(String key58) throws ForeignBlockchainException {
synchronized (this) {
// Serve from the cache if it's recent, and matches this xpub
if (Objects.equals(transactionsCacheXpub, key58)) {
if (transactionsCache != null && transactionsCacheTimestamp != null) {
Long now = NTP.getTime();
boolean isCacheStale = (now != null && now - transactionsCacheTimestamp >= TRANSACTIONS_CACHE_TIMEOUT);
if (!isCacheStale) {
return transactionsCache;
}
}
}
Context.propagate(bitcoinjContext);
Wallet wallet = walletFromDeterministicKey58(key58);
@ -405,9 +423,13 @@ public abstract class Bitcoiny implements ForeignBlockchain {
Comparator<SimpleTransaction> newestTimestampFirstComparator = Comparator.comparingInt(SimpleTransaction::getTimestamp).reversed();
// Update cache and return
return walletTransactions.stream()
transactionsCacheTimestamp = NTP.getTime();
transactionsCacheXpub = key58;
transactionsCache = walletTransactions.stream()
.map(t -> convertToSimpleTransaction(t, keySet))
.sorted(newestTimestampFirstComparator).collect(Collectors.toList());
return transactionsCache;
}
}