/**
* Encodes memcache message to a raw byte array.
*
* @param msg Message being serialized.
* @return Serialized message.
* @throws GridException If serialization failed.
*/
private ByteBuffer encodeMemcache(GridTcpRestPacket msg) throws GridException {
GridByteArrayList res = new GridByteArrayList(HDR_LEN);
int keyLength = 0;
int keyFlags = 0;
if (msg.key() != null) {
ByteArrayOutputStream rawKey = new ByteArrayOutputStream();
keyFlags = encodeObj(msg.key(), rawKey);
msg.key(rawKey.toByteArray());
keyLength = rawKey.size();
}
int dataLength = 0;
int valFlags = 0;
if (msg.value() != null) {
ByteArrayOutputStream rawVal = new ByteArrayOutputStream();
valFlags = encodeObj(msg.value(), rawVal);
msg.value(rawVal.toByteArray());
dataLength = rawVal.size();
}
int flagsLength = 0;
if (msg.addFlags()) // || keyFlags > 0 || valFlags > 0)
flagsLength = FLAGS_LENGTH;
res.add(MEMCACHE_RES_FLAG);
res.add(msg.operationCode());
// Cast is required due to packet layout.
res.add((short) keyLength);
// Cast is required due to packet layout.
res.add((byte) flagsLength);
// Data type is always 0x00.
res.add((byte) 0x00);
res.add((short) msg.status());
res.add(keyLength + flagsLength + dataLength);
res.add(msg.opaque(), 0, msg.opaque().length);
// CAS, unused.
res.add(0L);
assert res.size() == HDR_LEN;
if (flagsLength > 0) {
res.add((short) keyFlags);
res.add((short) valFlags);
}
assert msg.key() == null || msg.key() instanceof byte[];
assert msg.value() == null || msg.value() instanceof byte[];
if (keyLength > 0) res.add((byte[]) msg.key(), 0, ((byte[]) msg.key()).length);
if (dataLength > 0) res.add((byte[]) msg.value(), 0, ((byte[]) msg.value()).length);
return ByteBuffer.wrap(res.entireArray());
}
