/**
* Decodes value from a given byte array to the object according to the flags given.
*
* @param flags Flags.
* @param bytes Byte array to decode.
* @return Decoded value.
* @throws GridException If deserialization failed.
*/
private Object decodeObj(short flags, byte[] bytes) throws GridException {
assert bytes != null;
if ((flags & SERIALIZED_FLAG) != 0)
return jdkMarshaller.unmarshal(new ByteArrayInputStream(bytes), null);
int masked = flags & 0xff00;
switch (masked) {
case BOOLEAN_FLAG:
return bytes[0] == '1';
case INT_FLAG:
return U.bytesToInt(bytes, 0);
case LONG_FLAG:
return U.bytesToLong(bytes, 0);
case DATE_FLAG:
return new Date(U.bytesToLong(bytes, 0));
case BYTE_FLAG:
return bytes[0];
case FLOAT_FLAG:
return Float.intBitsToFloat(U.bytesToInt(bytes, 0));
case DOUBLE_FLAG:
return Double.longBitsToDouble(U.bytesToLong(bytes, 0));
case BYTE_ARR_FLAG:
return bytes;
default:
return new String(bytes);
}
}
/**
* Constructs message from bytes.
*
* @param buf Bytes.
* @param off Offset.
* @param len Packet length.
* @return Assembled message.
* @throws GridException If message length is invalid.
*/
public static GridClockMessage fromBytes(byte[] buf, int off, int len) throws GridException {
if (len < PACKET_SIZE)
throw new GridException("Failed to assemble time server packet (message is too short).");
long lsb = U.bytesToLong(buf, off);
long msb = U.bytesToLong(buf, off + 8);
UUID origNodeId = new UUID(msb, lsb);
lsb = U.bytesToLong(buf, off + 16);
msb = U.bytesToLong(buf, off + 24);
UUID targetNodeId = new UUID(msb, lsb);
long origTs = U.bytesToLong(buf, off + 32);
long replyTs = U.bytesToLong(buf, off + 40);
return new GridClockMessage(origNodeId, targetNodeId, origTs, replyTs);
}
/**
* Validates incoming packet and deserializes all fields that need to be deserialized.
*
* @param ses Session on which packet is being parsed.
* @param req Raw packet.
* @return Same packet with fields deserialized.
* @throws IOException If parsing failed.
* @throws GridException If deserialization failed.
*/
private GridClientMessage assemble(GridNioSession ses, GridTcpRestPacket req)
throws IOException, GridException {
byte[] extras = req.extras();
// First, decode key and value, if any
if (req.key() != null || req.value() != null) {
short keyFlags = 0;
short valFlags = 0;
if (req.hasFlags()) {
if (extras == null || extras.length < FLAGS_LENGTH)
throw new IOException(
"Failed to parse incoming packet (flags required for command) [ses="
+ ses
+ ", opCode="
+ Integer.toHexString(req.operationCode() & 0xFF)
+ ']');
keyFlags = U.bytesToShort(extras, 0);
valFlags = U.bytesToShort(extras, 2);
}
if (req.key() != null) {
assert req.key() instanceof byte[];
byte[] rawKey = (byte[]) req.key();
// Only values can be hessian-encoded.
req.key(decodeObj(keyFlags, rawKey));
}
if (req.value() != null) {
assert req.value() instanceof byte[];
byte[] rawVal = (byte[]) req.value();
req.value(decodeObj(valFlags, rawVal));
}
}
if (req.hasExpiration()) {
if (extras == null || extras.length < 8)
throw new IOException(
"Failed to parse incoming packet (expiration value required for command) [ses="
+ ses
+ ", opCode="
+ Integer.toHexString(req.operationCode() & 0xFF)
+ ']');
req.expiration(U.bytesToInt(extras, 4) & 0xFFFFFFFFL);
}
if (req.hasInitial()) {
if (extras == null || extras.length < 16)
throw new IOException(
"Failed to parse incoming packet (initial value required for command) [ses="
+ ses
+ ", opCode="
+ Integer.toHexString(req.operationCode() & 0xFF)
+ ']');
req.initial(U.bytesToLong(extras, 8));
}
if (req.hasDelta()) {
if (extras == null || extras.length < 8)
throw new IOException(
"Failed to parse incoming packet (delta value required for command) [ses="
+ ses
+ ", opCode="
+ Integer.toHexString(req.operationCode() & 0xFF)
+ ']');
req.delta(U.bytesToLong(extras, 0));
}
if (extras != null) {
// Clients that include cache name must always include flags.
int length = 4;
if (req.hasExpiration()) length += 4;
if (req.hasDelta()) length += 8;
if (req.hasInitial()) length += 8;
if (extras.length - length > 0) {
byte[] cacheName = new byte[extras.length - length];
System.arraycopy(extras, length, cacheName, 0, extras.length - length);
req.cacheName(new String(cacheName));
}
}
return req;
}
