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A simple, asynchronous, single-threaded Memcached client written in java.

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package net.spy.memcached.protocol.binary;

import java.util.Map;

import javax.security.auth.callback.CallbackHandler;
import javax.security.sasl.SaslClient;
import javax.security.sasl.SaslException;

import net.spy.memcached.ops.OperationCallback;
import net.spy.memcached.ops.SASLAuthOperation;

public class SASLAuthOperationImpl extends SASLBaseOperationImpl
	implements SASLAuthOperation {

	private final static int CMD = 0x21;

	public SASLAuthOperationImpl(String[] m, String s,
			Map p, CallbackHandler h, OperationCallback c) {
		super(CMD, m, EMPTY_BYTES, s, p, h, c);
	}

	@Override
	protected byte[] buildResponse(SaslClient sc) throws SaslException {
		return sc.hasInitialResponse() ?
					sc.evaluateChallenge(challenge)
					: EMPTY_BYTES;

	}
}