return asStream(id)//
                .header("Pragma", "no-cache")//
                .header("Cache-Control", "no-cache")//
                .header("Expires", "Thu, 01 Dec 1994 16:00:00 GMT")//
                .header("Content-Type", "application/x-ndjson")//
                .stream(out -> {

     * This method is called automatically after the bean construction is complete.
     * The cache is configured with a maximum size of 100 entries and expires after 10 minutes.
     */
    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }

var supportedHeaders = []string{
	"content-type",
	"cache-control",
	"content-language",
	"content-encoding",
	"content-disposition",
	"x-amz-storage-class",
	xhttp.AmzStorageClass,
	xhttp.AmzObjectTagging,
	"expires",
	xhttp.AmzBucketReplicationStatus,
	"X-Minio-Replication-Server-Side-Encryption-Sealed-Key",
	"X-Minio-Replication-Server-Side-Encryption-Seal-Algorithm",
	"X-Minio-Replication-Server-Side-Encryption-Iv",

}

func (ies *IAMEtcdStore) addUser(ctx context.Context, user string, userType IAMUserType, u UserIdentity, m map[string]UserIdentity) error {
	if u.Credentials.IsExpired() {
		// Delete expired identity.
		deleteKeyEtcd(ctx, ies.client, getUserIdentityPath(user, userType))
		deleteKeyEtcd(ctx, ies.client, getMappedPolicyPath(user, userType, false))
		return nil
	}
	if u.Credentials.AccessKey == "" {

		sc = objInfo.StorageClass
	}
	putOpts = minio.PutObjectOptions{
		UserMetadata:    meta,
		ContentType:     objInfo.ContentType,
		ContentEncoding: objInfo.ContentEncoding,
		Expires:         objInfo.Expires,
		StorageClass:    sc,
		Internal: minio.AdvancedPutOptions{
			SourceVersionID:    objInfo.VersionID,
			ReplicationStatus:  minio.ReplicationStatusReplica,
			SourceMTime:        objInfo.ModTime,

	// TransitionVersionID stores a version ID of the object associate
	// with the remote tier.
	TransitionVersionID string `msg:"tv"`
	// ExpireRestored indicates that the restored object is to be expired.
	ExpireRestored bool `msg:"exp"`

	// DataDir of the file
	DataDir string `msg:"dd"`

	// Indicates if this object is still in V1 format.
	XLV1 bool `msg:"v1"`

        // cid
        final String configId = crawlingConfig.getConfigId();
        if (configId != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldConfigId(), configId);
        }
        //  expires
        if (documentExpires != null) {
            putResultDataBody(dataMap, fessConfig.getIndexFieldExpires(), documentExpires);
        }
        // segment

    }
}
```

## 9. Performance Considerations

### 9.1 Memory Management
- Lease entries should be evicted based on LRU when max leases reached
- Implement periodic cleanup of expired leases

### 9.2 Thread Safety
- Use concurrent data structures for lease storage
- Minimize lock contention in hot paths
- Async handling of lease breaks

### 9.3 Network Efficiency

            Pattern.compile("[A-Z0-9._%+-]+@[A-Z0-9.-]+\\.[A-Z]{2,6}", Pattern.CASE_INSENSITIVE);

    /**
     * Cache for storing resource file modification timestamps to enable cache busting.
     * The cache expires after 10 minutes and has a maximum size of 1000 entries.
     */
    private static LoadingCache<String, Long> resourceHashCache =

        response.header("Pragma", "no-cache");
        response.header("Cache-Control", "no-cache");
        response.header("Expires", "Thu, 01 Dec 1994 16:00:00 GMT");
        response.contentTypeOctetStream();
        return response.stream(out -> {
            try {
                downloadObject(getObjectName(pi.getPath(), pi.getName()), out);