zookeeper分布式锁(十一)

ZNodeName：

class ZNodeName implements Comparable<ZNodeName> {    private final String name;    private String prefix;    private int sequence = -1;    private static final Logger LOG = LoggerFactory.getLogger(ZNodeName.class);        public ZNodeName(String name) {        if (name == null) {            throw new NullPointerException("id cannot be null");        }        this.name = name;        this.prefix = name;        int idx = name.lastIndexOf('-');        if (idx >= 0) {            this.prefix = name.substring(0, idx);            try {                this.sequence = Integer.parseInt(name.substring(idx + 1));                // If an exception occurred we misdetected a sequence suffix,                // so return -1.            } catch (NumberFormatException e) {                LOG.info("Number format exception for " + idx, e);            } catch (ArrayIndexOutOfBoundsException e) {               LOG.info("Array out of bounds for " + idx, e);            }        }    }    @Override    public String toString() {        return name.toString();    }    @Override    public boolean equals(Object o) {        if (this == o) return true;        if (o == null || getClass() != o.getClass()) return false;        ZNodeName sequence = (ZNodeName) o;        if (!name.equals(sequence.name)) return false;        return true;    }    @Override    public int hashCode() {        return name.hashCode() + 37;    }    public int compareTo(ZNodeName that) {        int answer = this.prefix.compareTo(that.prefix);        if (answer == 0) {            int s1 = this.sequence;            int s2 = that.sequence;            if (s1 == -1 && s2 == -1) {                return this.name.compareTo(that.name);            }            answer = s1 == -1 ? 1 : s2 == -1 ? -1 : s1 - s2;        }        return answer;    }    /**     * Returns the name of the znode     */    public String getName() {        return name;    }    /**     * Returns the sequence number     */    public int getZNodeName() {        return sequence;    }    /**     * Returns the text prefix before the sequence number     */    public String getPrefix() {        return prefix;    }}