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TransactionDuplicatesCheckerImpl.java
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TransactionDuplicatesCheckerImpl.java
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package brs.transactionduplicates;
import brs.Transaction;
import brs.TransactionType;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.HashMap;
public class TransactionDuplicatesCheckerImpl {
private final Logger logger = LoggerFactory.getLogger(TransactionDuplicatesCheckerImpl.class);
private final HashMap<TransactionType, HashMap<String, Transaction>> duplicates = new HashMap<>();
public void clear() {
duplicates.clear();
}
public TransactionDuplicationResult removeCheaperDuplicate(Transaction transaction) {
final TransactionDuplicationKey transactionDuplicateKey = transaction.getDuplicationKey();
if (transactionDuplicateKey.equals(TransactionDuplicationKey.IS_ALWAYS_DUPLICATE)) {
logger.debug("Transaction {}: Is always a duplicate (Type: {})", transaction.getId(), transaction.getType().toString());
return new TransactionDuplicationResult(true, null);
} else if (transactionDuplicateKey.equals(TransactionDuplicationKey.IS_NEVER_DUPLICATE)) {
return new TransactionDuplicationResult(false, null);
}
duplicates.computeIfAbsent(transactionDuplicateKey.transactionType, n -> new HashMap<>());
final HashMap<String, Transaction> transactionOverview = duplicates.get(transactionDuplicateKey.transactionType);
final Transaction possiblyExistingTransaction = transactionOverview.get(transactionDuplicateKey.key);
if (possiblyExistingTransaction != null && possiblyExistingTransaction.getFeeNQT() >= transaction.getFeeNQT()) {
logger.debug("Transaction {}: is a duplicate of {} (Type: {})", transaction.getId(), possiblyExistingTransaction.getId(), transaction.getType());
return new TransactionDuplicationResult(true, transaction);
} else {
transactionOverview.put(transactionDuplicateKey.key, transaction);
return new TransactionDuplicationResult(possiblyExistingTransaction != null, possiblyExistingTransaction);
}
}
public boolean hasAnyDuplicate(Transaction transaction) {
final TransactionDuplicationKey transactionDuplicateKey = transaction.getDuplicationKey();
if (transactionDuplicateKey.equals(TransactionDuplicationKey.IS_ALWAYS_DUPLICATE)) {
return true;
} else if (transactionDuplicateKey.equals(TransactionDuplicationKey.IS_NEVER_DUPLICATE)) {
return false;
}
duplicates.computeIfAbsent(transactionDuplicateKey.transactionType, n -> new HashMap<>());
final HashMap<String, Transaction> transactionOverview = duplicates.get(transactionDuplicateKey.transactionType);
if (transactionOverview.containsKey(transactionDuplicateKey.key)) {
return true;
} else {
transactionOverview.put(transactionDuplicateKey.key, transaction);
return false;
}
}
public void removeTransaction(Transaction transaction) {
final TransactionDuplicationKey transactionDuplicateKey = transaction.getDuplicationKey();
if (!transactionDuplicateKey.equals(TransactionDuplicationKey.IS_ALWAYS_DUPLICATE) && !transactionDuplicateKey.equals(TransactionDuplicationKey.IS_NEVER_DUPLICATE)) {
if (duplicates.containsKey(transactionDuplicateKey.transactionType)) {
if(duplicates.get(transactionDuplicateKey.transactionType).get(transactionDuplicateKey.key) == transaction) {
duplicates.get(transactionDuplicateKey.transactionType).remove(transactionDuplicateKey.key);
}
}
}
}
}