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Tarantool client for java
package org.tarantool;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.ArrayList;
import java.util.EnumMap;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.concurrent.atomic.AtomicLong;
public abstract class TarantoolBase extends AbstractTarantoolOps, Object, Result> {
protected static final String WELCOME = "Tarantool ";
protected String serverVersion;
/**
* Connection state
*/
protected String salt;
protected MsgPackLite msgPackLite = MsgPackLite.INSTANCE;
protected AtomicLong syncId = new AtomicLong();
protected int initialRequestSize = 4096;
/**
* Read properties
*/
protected DataInputStream is;
protected CountInputStream cis;
protected Map headers;
protected Map body;
public TarantoolBase() {
}
public TarantoolBase(String username, String password, Socket socket) {
super();
try {
cis = new CountInputStreamImpl(socket.getInputStream());
is = new DataInputStream(cis);
byte[] bytes = new byte[64];
is.readFully(bytes);
String firstLine = new String(bytes);
if (!firstLine.startsWith(WELCOME)) {
closeStreams();
close();
throw new CommunicationException("Welcome message should starts with tarantool but starts with '" + firstLine + "'", new IllegalStateException("Invalid welcome packet"));
}
serverVersion = firstLine.substring(WELCOME.length());
is.readFully(bytes);
this.salt = new String(bytes);
if (username != null && password != null) {
ByteBuffer authPacket = createAuthPacket(username, password);
OutputStream os = socket.getOutputStream();
os.write(authPacket.array(), 0, authPacket.remaining());
os.flush();
readPacket();
Long code = (Long) headers.get(Key.CODE.getId());
if (code != 0) {
closeStreams();
throw serverError(code, body.get(Key.ERROR.getId()));
}
}
} catch (IOException e) {
closeStreams();
throw new CommunicationException("Couldn't connect to tarantool", e);
}
}
protected ByteBuffer createAuthPacket(String username, final String password) throws IOException {
final MessageDigest sha1;
try {
sha1 = MessageDigest.getInstance("SHA-1");
} catch (NoSuchAlgorithmException e) {
throw new IllegalStateException(e);
}
List auth = new ArrayList(2);
auth.add("chap-sha1");
byte[] p = sha1.digest(password.getBytes());
sha1.reset();
byte[] p2 = sha1.digest(p);
sha1.reset();
sha1.update(Base64.decode(salt), 0, 20);
sha1.update(p2);
byte[] scramble = sha1.digest();
for (int i = 0, e = 20; i < e; i++) {
p[i] ^= scramble[i];
}
auth.add(p);
return createPacket(Code.AUTH, 0L, null, Key.USER_NAME, username, Key.TUPLE, auth);
}
protected ByteBuffer createPacket(Code code, Long syncId, Long schemaId, Object... args) throws IOException {
TarantoolClientImpl.ByteArrayOutputStream bos = new TarantoolClientImpl.ByteArrayOutputStream(initialRequestSize);
bos.write(new byte[5]);
DataOutputStream ds = new DataOutputStream(bos);
Map header = new EnumMap(Key.class);
Map body = new EnumMap(Key.class);
header.put(Key.CODE, code);
header.put(Key.SYNC, syncId);
if (schemaId != null) {
header.put(Key.SCHEMA_ID, schemaId);
}
if (args != null) {
for (int i = 0, e = args.length; i < e; i += 2) {
Object value = args[i + 1];
body.put((Key) args[i], value);
}
}
msgPackLite.pack(header, ds);
msgPackLite.pack(body, ds);
ds.flush();
ByteBuffer buffer = bos.toByteBuffer();
buffer.put(0, (byte) 0xce);
buffer.putInt(1, bos.size() - 5);
return buffer;
}
protected void readPacket() throws IOException {
int size = ((Number) msgPackLite.unpack(is)).intValue();
long mark = cis.getBytesRead();
headers = (Map) msgPackLite.unpack(is);
if (cis.getBytesRead() - mark < size) {
body = (Map) msgPackLite.unpack(is);
}
is.skipBytes((int) (cis.getBytesRead() - mark - size));
}
protected static class SQLMetaData {
protected String name;
public SQLMetaData(String name) {
this.name = name;
}
public String getName() {
return name;
}
@Override
public String toString() {
return "SQLMetaData{" +
"name='" + name + '\'' +
'}';
}
}
protected List getSQLMetadata() {
List> meta = (List>) body.get(Key.SQL_METADATA.getId());
List values = new ArrayList(meta.size());
for(Map c:meta ) {
values.add(new SQLMetaData((String) c.get(Key.SQL_FIELD_NAME.getId())));
}
return values;
}
protected List> getSQLData() {
return (List>) body.get(Key.DATA.getId());
}
protected List> readSqlResult(List> data) {
List> values = new ArrayList>(data.size());
List metaData = getSQLMetadata();
LinkedHashMap value = new LinkedHashMap();
for (List row : data) {
for (int i = 0; i < row.size(); i++) {
value.put(metaData.get(i).getName(), row.get(i));
}
values.add(value);
}
return values;
}
protected Long getSqlRowCount() {
Map info = (Map) body.get(Key.SQL_INFO.getId());
Number rowCount;
if (info != null && (rowCount = ((Number) info.get(Key.SQL_ROW_COUNT.getId()))) != null) {
return rowCount.longValue();
}
return null;
}
protected TarantoolException serverError(long code, Object error) {
return new TarantoolException(code, error instanceof String ? (String) error : new String((byte[]) error));
}
protected class ByteArrayOutputStream extends java.io.ByteArrayOutputStream {
public ByteArrayOutputStream(int size) {
super(size);
}
ByteBuffer toByteBuffer() {
return ByteBuffer.wrap(buf, 0, count);
}
}
protected void closeChannel(SocketChannel channel) {
if (channel != null) {
try {
channel.close();
} catch (IOException ignored) {
}
}
}
protected void closeStreams() {
if (is != null) {
try {
is.close();
} catch (IOException ignored) {
}
}
if (cis != null) {
try {
cis.close();
} catch (IOException ignored) {
}
}
}
protected void validateArgs(Object[] args) {
if (args != null) {
for (int i = 0; i < args.length; i += 2) {
if (args[i + 1] == null) {
throw new NullPointerException(((Key) args[i]).name() + " should not be null");
}
}
}
}
public void setInitialRequestSize(int initialRequestSize) {
this.initialRequestSize = initialRequestSize;
}
public String getServerVersion() {
return serverVersion;
}
}