package org.klomp.snark.dht;
/*
* GPLv2
*/
import java.util.Date;
import net.i2p.I2PAppContext;
import net.i2p.data.ByteArray;
/**
* Used for Both outgoing and incoming tokens
*
* @since 0.9.2
* @author zzz
*/
class Token extends ByteArray {
private static final int MY_TOK_LEN = 8;
private static final int MAX_TOK_LEN = 64;
private final long lastSeen;
/** outgoing - generate a random token */
public Token(I2PAppContext ctx) {
super(null);
byte[] data = new byte[MY_TOK_LEN];
ctx.random().nextBytes(data);
setData(data);
setValid(MY_TOK_LEN);
lastSeen = ctx.clock().now();
}
/** incoming - save the token (arbitrary length) */
public Token(I2PAppContext ctx, byte[] data) {
super(data);
// lets not get carried away
if (data.length > MAX_TOK_LEN)
throw new IllegalArgumentException();
lastSeen = ctx.clock().now();
}
/** incoming - for lookup only, not storage, lastSeen is 0 */
public Token(byte[] data) {
super(data);
lastSeen = 0;
}
public long lastSeen() {
return lastSeen;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder(64);
buf.append("[Token: ");
byte[] bs = getData();
if (bs.length == 0) {
buf.append("0 bytes");
} else {
buf.append(bs.length).append(" bytes: 0x");
// backwards, but the same way BEValue does it
for (int i = 0; i < bs.length; i++) {
int b = bs[i] & 0xff;
if (b < 16)
buf.append('0');
buf.append(Integer.toHexString(b));
}
}
if (lastSeen > 0)
buf.append(" created ").append((new Date(lastSeen)).toString());
buf.append(']');
return buf.toString();
}
}