com.commercetools.sunrise.sessions.SessionCookieStrategy Maven / Gradle / Ivy

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package com.commercetools.sunrise.sessions;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import play.mvc.Http;

import javax.annotation.Nullable;
import javax.inject.Singleton;
import java.util.Optional;

/**
 * Uses a session cookie to store information about the user.
 */
@Singleton
public class SessionCookieStrategy implements SessionStrategy {

    protected final Logger logger = LoggerFactory.getLogger(getClass());

    /**
     * {@inheritDoc}
     */
    @Override
    public Optional findValueByKey(final String key) {
        final Optional value = Optional.ofNullable(session().get(key));
        if (value.isPresent()) {
            logger.debug("Loaded from session \"{}\" = {}", key, value.get());
        } else {
            logger.debug("Not found in session \"{}\"", key);
        }
        return value;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void overwriteValueByKey(final String key, @Nullable final String value) {
        if (value != null) {
            session().put(key, value);
            logger.debug("Saved in session \"{}\" = {}", key, value);
        } else {
            removeValueByKey(key);
        }
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public void removeValueByKey(final String key) {
        final String oldValue = session().remove(key);
        logger.debug("Removed from session \"{}\" = {}", key, oldValue);
    }

    private Http.Session session() {
        return Http.Context.current().session();
    }
}