search_engine.heartbeat_interval=10000

# Cipher algorithm used for encryption.
app.cipher.algorithm=aes
# Secret key for encryption (change this value for production).
app.cipher.key=___change__me___
# Algorithm for digest calculation.
app.digest.algorithm=sha256
# Regex pattern for properties to encrypt.
app.encrypt.property.pattern=.*password|.*key|.*token|.*secret

        if (logger.isDebugEnabled()) {
            logger.debug("system.properties: {}", value);
        }
        if (StringUtil.isNotBlank(value)) {
            ParameterUtil.parse(ParameterUtil.encrypt(value)).entrySet().stream().filter(e -> {
                final String key = e.getKey();
                if (StringUtil.isBlank(key)) {
                    return false;
                }

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.crypto.CachedCipher;
import org.codelibs.core.misc.DynamicProperties;
import org.codelibs.fess.api.WebApiManagerFactory;
import org.codelibs.fess.auth.AuthenticationManager;
import org.codelibs.fess.chat.ChatClient;

    /** Queries field name. */
    public static final String QUERIES = "queries";

    /** Virtual hosts field name. */
    public static final String VIRTUAL_HOSTS = "virtualHosts";

    /** Prefix for encrypted/ciphered values. */
    public static final String CIPHER_PREFIX = "{cipher}";

    /** System user identifier. */
    public static final String SYSTEM_USER = "system";

    /** Empty user ID placeholder. */

     */
    String getAppDigestAlgorithm();

    /**
     * Get the value for the key 'app.encrypt.property.pattern'. <br>
     * The value is, e.g. .*password|.*key|.*token|.*secret <br>
     * comment: Regex pattern for properties to encrypt.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */