public StoredUndoableBlock getUndoBlock(Sha256Hash hash) throws BlockStoreException {
maybeConnect();
PreparedStatement s = null;
try {
s =
conn.get()
.prepareStatement(
"SELECT txOutChanges, transactions FROM undoableBlocks WHERE hash = ?");
// We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
byte[] hashBytes = new byte[28];
System.arraycopy(hash.getBytes(), 3, hashBytes, 0, 28);
s.setBytes(1, hashBytes);
ResultSet results = s.executeQuery();
if (!results.next()) {
return null;
}
// Parse it.
byte[] txOutChanges = results.getBytes(1);
byte[] transactions = results.getBytes(2);
StoredUndoableBlock block;
if (txOutChanges == null) {
int offset = 0;
int numTxn =
((transactions[offset++] & 0xFF) << 0)
| ((transactions[offset++] & 0xFF) << 8)
| ((transactions[offset++] & 0xFF) << 16)
| ((transactions[offset++] & 0xFF) << 24);
List<Transaction> transactionList = new LinkedList<Transaction>();
for (int i = 0; i < numTxn; i++) {
Transaction tx = new Transaction(params, transactions, offset);
transactionList.add(tx);
offset += tx.getMessageSize();
}
block = new StoredUndoableBlock(hash, transactionList);
} else {
TransactionOutputChanges outChangesObject =
new TransactionOutputChanges(new ByteArrayInputStream(txOutChanges));
block = new StoredUndoableBlock(hash, outChangesObject);
}
return block;
} catch (SQLException ex) {
throw new BlockStoreException(ex);
} catch (NullPointerException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (ClassCastException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (ProtocolException e) {
// Corrupted database.
throw new BlockStoreException(e);
} catch (IOException e) {
// Corrupted database.
throw new BlockStoreException(e);
} finally {
if (s != null)
try {
s.close();
} catch (SQLException e) {
throw new BlockStoreException("Failed to close PreparedStatement");
}
}
}
public void put(StoredBlock storedBlock, StoredUndoableBlock undoableBlock)
throws BlockStoreException {
maybeConnect();
// We skip the first 4 bytes because (on prodnet) the minimum target has 4 0-bytes
byte[] hashBytes = new byte[28];
System.arraycopy(storedBlock.getHeader().getHash().getBytes(), 3, hashBytes, 0, 28);
int height = storedBlock.getHeight();
byte[] transactions = null;
byte[] txOutChanges = null;
try {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
if (undoableBlock.getTxOutChanges() != null) {
undoableBlock.getTxOutChanges().serializeToStream(bos);
txOutChanges = bos.toByteArray();
} else {
int numTxn = undoableBlock.getTransactions().size();
bos.write((int) (0xFF & (numTxn >> 0)));
bos.write((int) (0xFF & (numTxn >> 8)));
bos.write((int) (0xFF & (numTxn >> 16)));
bos.write((int) (0xFF & (numTxn >> 24)));
for (Transaction tx : undoableBlock.getTransactions()) tx.rimbitSerialize(bos);
transactions = bos.toByteArray();
}
bos.close();
} catch (IOException e) {
throw new BlockStoreException(e);
}
try {
if (log.isDebugEnabled())
log.debug("Looking for undoable block with hash: " + Utils.bytesToHexString(hashBytes));
PreparedStatement findS =
conn.get().prepareStatement("select 1 from undoableBlocks where hash = ?");
findS.setBytes(1, hashBytes);
ResultSet rs = findS.executeQuery();
if (rs.next()) {
// We already have this output, update it.
findS.close();
// Postgres insert-or-updates are very complex (and finnicky). This level of transaction
// isolation
// seems to work for rimbitj
PreparedStatement s =
conn.get()
.prepareStatement(
"UPDATE undoableBlocks SET txOutChanges=?, transactions=?" + " WHERE hash = ?");
s.setBytes(3, hashBytes);
if (log.isDebugEnabled())
log.debug("Updating undoable block with hash: " + Utils.bytesToHexString(hashBytes));
if (transactions == null) {
s.setBytes(1, txOutChanges);
s.setNull(2, Types.BINARY);
} else {
s.setNull(1, Types.BINARY);
s.setBytes(2, transactions);
}
s.executeUpdate();
s.close();
return;
}
PreparedStatement s =
conn.get()
.prepareStatement(
"INSERT INTO undoableBlocks(hash, height, txOutChanges, transactions)"
+ " VALUES(?, ?, ?, ?)");
s.setBytes(1, hashBytes);
s.setInt(2, height);
if (log.isDebugEnabled())
log.debug(
"Inserting undoable block with hash: "
+ Utils.bytesToHexString(hashBytes)
+ " at height "
+ height);
if (transactions == null) {
s.setBytes(3, txOutChanges);
s.setNull(4, Types.BINARY);
} else {
s.setNull(3, Types.BINARY);
s.setBytes(4, transactions);
}
s.executeUpdate();
s.close();
try {
putUpdateStoredBlock(storedBlock, true);
} catch (SQLException e) {
throw new BlockStoreException(e);
}
} catch (SQLException e) {
if (!e.getSQLState().equals(POSTGRES_DUPLICATE_KEY_ERROR_CODE))
throw new BlockStoreException(e);
}
}