org.jresearch.flexess.client.context.UserContextManager Maven / Gradle / Ivy

Go to download
package org.jresearch.flexess.client.context;

import java.util.Optional;

import org.jresearch.flexess.umi.api.IUmiUserManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * This class is responsible for associating user information with the current
 * thread by binding the user context to ThreadLocal object.
 *
 * @see org.jresearch.flexess.client.context.IUserContext
 *
 */
public class UserContextManager {

	private final static Logger logger = LoggerFactory.getLogger(UserContextManager.class);

	private static InheritableThreadLocal currentInstance = new InheritableThreadLocal<>();

	private UserContextManager() {
		super();
	}

	/**
	 * Binds given UserContext to the current thread.
	 *
	 * @param context
	 *            the user context
	 */
	public static void setContext(final IUserContext context) {
		logger.info("Init user context for user {}, thread {}", context == null ? null : context.getUserId(), Thread.currentThread()); //$NON-NLS-1$
		currentInstance.set(context);
	}

	/**
	 * Retrieves the user context from the current thread. If no context exists
	 * returns the context for anonymous user
	 *
	 * @return the user context
	 */
	public static IUserContext getContext() {
		IUserContext userContext = currentInstance.get();
		if (userContext == null) {
			setContext(userContext = new UserContext(IUmiUserManager.ANONYMOUS_USER_NAME));
		}
		return userContext;
	}

	/**
	 * Retrieves the user context from the current thread.
	 *
	 * @return the user context
	 */
	public static Optional getContextRav() {
		return Optional.ofNullable(currentInstance.get());
	}

	/**
	 * Clears current user context (removes binding from the current thread).
	 */
	public static void clearContext() {
		currentInstance.set(null);
	}

}