@Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
StoredBlock other = (StoredBlock) o;
return header.equals(other.header)
&& chainWork.equals(other.chainWork)
&& height == other.height;
}
private void load(File file) throws IOException, BlockStoreException {
log.info("Reading block store from {}", file);
InputStream input = null;
try {
input = new BufferedInputStream(new FileInputStream(file));
// Read a version byte.
int version = input.read();
if (version == -1) {
// No such file or the file was empty.
throw new FileNotFoundException(file.getName() + " does not exist or is empty");
}
if (version != 1) {
throw new BlockStoreException("Bad version number: " + version);
}
// Chain head pointer is the first thing in the file.
byte[] chainHeadHash = new byte[32];
if (input.read(chainHeadHash) < chainHeadHash.length)
throw new BlockStoreException("Truncated block store: cannot read chain head hash");
this.chainHead = new Sha256Hash(chainHeadHash);
log.info("Read chain head from disk: {}", this.chainHead);
long now = System.currentTimeMillis();
// Rest of file is raw block headers.
byte[] headerBytes = new byte[Block.HEADER_SIZE];
try {
while (true) {
// Read a block from disk.
if (input.read(headerBytes) < 80) {
// End of file.
break;
}
// Parse it.
Block b = new Block(params, headerBytes);
// Look up the previous block it connects to.
StoredBlock prev = get(b.getPrevBlockHash());
StoredBlock s;
if (prev == null) {
// First block in the stored chain has to be treated specially.
if (b.equals(params.genesisBlock)) {
s =
new StoredBlock(
params.genesisBlock.cloneAsHeader(), params.genesisBlock.getWork(), 0);
} else {
throw new BlockStoreException(
"Could not connect "
+ b.getHash().toString()
+ " to "
+ b.getPrevBlockHash().toString());
}
} else {
// Don't try to verify the genesis block to avoid upsetting the unit tests.
b.verifyHeader();
// Calculate its height and total chain work.
s = prev.build(b);
}
// Save in memory.
blockMap.put(b.getHash(), s);
}
} catch (ProtocolException e) {
// Corrupted file.
throw new BlockStoreException(e);
} catch (VerificationException e) {
// Should not be able to happen unless the file contains bad blocks.
throw new BlockStoreException(e);
}
long elapsed = System.currentTimeMillis() - now;
log.info("Block chain read complete in {}ms", elapsed);
} finally {
if (input != null) input.close();
}
}