# 세 타입이 조립 결과에 대해 하는 일
  public PubSubChannel {
    Objects.requireNonNull(namespace, "namespace must be non-null");
    Objects.requireNonNull(name, "name must be non-null");
    Objects.requireNonNull(messageCodec, "message codec must be non-null");
  public String render() {
    return namespace.prefix() + ':' + name.entity() + ':' + name.identifier();
  }
}
  public ShardedPubSubChannel {
    Objects.requireNonNull(namespace, "namespace must be non-null");
    Objects.requireNonNull(name, "name must be non-null");
    Objects.requireNonNull(messageCodec, "message codec must be non-null");
  public String render() {
    return namespace.prefix() + ':' + name.entity() + ':' + name.identifier();
  }
}
  public PubSubPattern {
    Objects.requireNonNull(namespace, "namespace must be non-null");
    Objects.requireNonNull(suffixPattern, "suffix pattern must be non-null");
    Objects.requireNonNull(messageCodec, "message codec must be non-null");
    if (suffixPattern.isBlank() || suffixPattern.indexOf(':') >= 0) {
      throw new IllegalArgumentException(
          "a pattern suffix must be non-blank and must not cross a namespace separator");
    }
    RedisKeyRules.requireRenderedSize(
        namespace.prefix() + ':' + suffixPattern, RedisKeyRules.MAX_KEY_BYTES);
  }
   */
  public String render() {
    return namespace.prefix() + ':' + suffixPattern;
  }

# requireRenderedSize 가 나오는 곳 전부 (첫 줄은 선언)
    sdk/api/key/RedisKeyRules.java:89:  public static String requireRenderedSize(String rendered, int maxKeyBytes) {
    sdk/api/key/RedisKeyRenderer.java:45:    return RedisKeyRules.requireRenderedSize(rendered.toString(), maxKeyBytes);
    sdk/api/operations/PubSubPattern.java:30:    RedisKeyRules.requireRenderedSize(

# 조각이 받는 규칙과 상한 상수
    19:  public static final int MAX_KEY_BYTES = 512;
    21:  private static final Pattern TOKEN = Pattern.compile("^[a-z0-9]([a-z0-9-]{0,62}[a-z0-9])?$");
    23:  private static final Pattern IDENTIFIER = Pattern.compile("^[A-Za-z0-9][A-Za-z0-9._~-]{0,127}$");
    91:    if (maxKeyBytes < 1 || maxKeyBytes > MAX_KEY_BYTES) {
    92:      throw new IllegalArgumentException("maximum key bytes must be in 1.." + MAX_KEY_BYTES);
    RedisNamespace.java:16:    RedisKeyRules.requireToken("environment", environment);
    RedisNamespace.java:17:    RedisKeyRules.requireToken("service", service);
    RedisNamespace.java:18:    RedisKeyRules.requireToken("domain", domain);
    RedisKeyName.java:12:    RedisKeyRules.requireToken("entity", entity);
    RedisKeyName.java:13:    RedisKeyRules.requireIdentifier(identifier);
    RedisSlotTag.java:15:    RedisKeyRules.requireIdentifier(value);

# 키를 렌더하는 곳: 조각 사이에 슬롯 태그가 하나 더 들어간다
  public String render(QualifiedRedisKey key) {
    Objects.requireNonNull(key, "qualified key must be non-null");
    StringBuilder rendered = new StringBuilder(64);
    rendered.append(key.namespace().prefix()).append(':');
    key.slotTag().ifPresent(tag -> rendered.append('{').append(tag.value()).append("}:"));
    rendered.append(key.name().entity()).append(':').append(key.name().identifier());
    return RedisKeyRules.requireRenderedSize(rendered.toString(), maxKeyBytes);
  }

# 그 검사가 보는 상한은 생성자로 주입받는다
   *
   * @param maxKeyBytes the configured maximum rendered key size in UTF-8 bytes
   */
  public RedisKeyRenderer(int maxKeyBytes) {
    if (maxKeyBytes < 1 || maxKeyBytes > RedisKeyRules.MAX_KEY_BYTES) {
      throw new IllegalArgumentException(
          "maximum key bytes must be in 1.." + RedisKeyRules.MAX_KEY_BYTES);
    }
    this.maxKeyBytes = maxKeyBytes;

# 주입하는 곳
    src/main 에서 new RedisKeyRenderer( : 0 건
    src/test 에서 new RedisKeyRenderer( : 12 건
    getMaxKeyBytes / getLimits 를 부르는 src/main 코드
        sdk/config/RedisSdkSettings.java:272:    public int getMaxKeyBytes() {
        sdk/config/RedisSdkSettings.java:908:  public Limits getLimits() {
    설정 자체는 등록되어 있다
        2116:  - name: APP_REDIS_LIMITS_MAX_KEY_BYTES
            private int maxKeyBytes = 512;
              if (maxKeyBytes < 1 || maxKeyBytes > RedisKeyRules.MAX_KEY_BYTES) {
                throw new IllegalStateException(
                    "max-key-bytes must be in 1.." + RedisKeyRules.MAX_KEY_BYTES);

# 기본 이름공간
    private String environment = "local";
    private String service = "sample-service";
    private String domain = "shared";