/** Internal method. Connect to searchd and exchange versions. */
private Socket _Connect() {
if (_socket != null) return _socket;
_connerror = false;
Socket sock = null;
try {
sock = new Socket();
sock.setSoTimeout(_timeout);
InetSocketAddress addr = new InetSocketAddress(_host, _port);
sock.connect(addr, _timeout);
DataInputStream sIn = new DataInputStream(sock.getInputStream());
int version = sIn.readInt();
if (version < 1) {
sock.close();
_error = "expected searchd protocol version 1+, got version " + version;
return null;
}
DataOutputStream sOut = new DataOutputStream(sock.getOutputStream());
sOut.writeInt(VER_MAJOR_PROTO);
} catch (IOException e) {
_error = "connection to " + _host + ":" + _port + " failed: " + e;
_connerror = true;
try {
if (sock != null) sock.close();
} catch (IOException e1) {
}
return null;
}
return sock;
}
/** Internal method. Connect to searchd, send request, get response as DataInputStream. */
private DataInputStream _DoRequest(int command, int version, ByteArrayOutputStream req) {
/* connect */
Socket sock = _Connect();
if (sock == null) return null;
/* send request */
byte[] reqBytes = req.toByteArray();
try {
DataOutputStream sockDS = new DataOutputStream(sock.getOutputStream());
sockDS.writeShort(command);
sockDS.writeShort(version);
sockDS.writeInt(reqBytes.length);
sockDS.write(reqBytes);
} catch (Exception e) {
_error = "network error: " + e;
_connerror = true;
return null;
}
/* get response */
byte[] response = _GetResponse(sock);
if (response == null) return null;
/* spawn that tampon */
return new DataInputStream(new ByteArrayInputStream(response));
}
/** Open persistent connection to searchd. */
public boolean Open() {
if (_socket != null) {
_error = "already connected";
return false;
}
Socket sock = _Connect();
if (sock == null) return false;
// command, command version = 0, body length = 4, body = 1
try {
DataOutputStream sOut = new DataOutputStream(sock.getOutputStream());
sOut.writeShort(SEARCHD_COMMAND_PERSIST);
sOut.writeShort(0);
sOut.writeInt(4);
sOut.writeInt(1);
} catch (IOException e) {
_error = "network error: " + e;
_connerror = true;
}
_socket = sock;
return true;
}