UrlConfigValue

import org.apache.deltaspike.core.api.config.ConfigResolver;
import java.util.concurrent.TimeUnit;

/**
 * A value taken from DeltaSpike configuration.
 * But with configurable expiry time
 *
 * Use the {@link #get()} method to resolve the cached or re-loaded value
 *
 * @author Mark Struberg
 */
public final class UrlConfigValue {
    public static final int DEFAULT_RELOAD_TIME = 300;

    private final ConfigResolver.TypedResolver<String> resolver;

    /**
     * This will reload after {@link #DEFAULT_RELOAD_TIME}
     * @param configKey the name of the configuration key
     */
    public UrlConfigValue(String configKey) {
        this(configKey, null, DEFAULT_RELOAD_TIME);
    }

    /**
     * @param configKey the name of the configuration key
     * @param reloadAfterSeconds after how many seconds the value should get resolved from the underlying config system again
     */
    public UrlConfigValue(String configKey, int reloadAfterSeconds) {
        this(configKey, null, reloadAfterSeconds);
    }

    /**
     * @param configKey the name of the configuration key
     * @param defaultValue the default value
     * @param reloadAfterSeconds after how many seconds the value should get resolved from the underlying config system again
     */
    public UrlConfigValue(String configKey, String defaultValue, int reloadAfterSeconds) {
        this.resolver = ConfigResolver.resolve(configKey)
                                      .withDefault(defaultValue)
                                      .cacheFor(TimeUnit.SECONDS, reloadAfterSeconds)
                                      .evaluateVariables(true)
                                      .withCurrentProjectStage(true)
                                      .logChanges(true);
    }

    public String get() {
        return resolver.getValue();
    }

    public String configKey() {
        return resolver.getKey();
    }

    @Override
    public String toString() {
        return get();
    }

}