Drop EhCache2 support

Issue gh-10363

core/src/main/java/org/springframework/security/core/userdetails/cache/EhCacheBasedUserCache.java

@@ -1,81 +0,0 @@
-/*
- * Copyright 2004, 2005, 2006 Acegi Technology Pty Limited
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      https://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.springframework.security.core.userdetails.cache;
-
-import net.sf.ehcache.Ehcache;
-import net.sf.ehcache.Element;
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
-import org.springframework.beans.factory.InitializingBean;
-import org.springframework.core.log.LogMessage;
-import org.springframework.security.core.userdetails.UserCache;
-import org.springframework.security.core.userdetails.UserDetails;
-import org.springframework.util.Assert;
-
-/**
- * Caches <code>User</code> objects using a Spring IoC defined
- * <A HREF="https://www.ehcache.org/">EHCACHE</a>.
- *
- * @author Ben Alex
- * @deprecated since 5.6. In favor of JCache based implementations
- */
-@Deprecated
-public class EhCacheBasedUserCache implements UserCache, InitializingBean {
-
-	private static final Log logger = LogFactory.getLog(EhCacheBasedUserCache.class);
-
-	private Ehcache cache;
-
-	@Override
-	public void afterPropertiesSet() {
-		Assert.notNull(this.cache, "cache mandatory");
-	}
-
-	public Ehcache getCache() {
-		return this.cache;
-	}
-
-	@Override
-	public UserDetails getUserFromCache(String username) {
-		Element element = this.cache.get(username);
-		logger.debug(LogMessage.of(() -> "Cache hit: " + (element != null) + "; username: " + username));
-		return (element != null) ? (UserDetails) element.getValue() : null;
-	}
-
-	@Override
-	public void putUserInCache(UserDetails user) {
-		Element element = new Element(user.getUsername(), user);
-		logger.debug(LogMessage.of(() -> "Cache put: " + element.getKey()));
-		this.cache.put(element);
-	}
-
-	public void removeUserFromCache(UserDetails user) {
-		logger.debug(LogMessage.of(() -> "Cache remove: " + user.getUsername()));
-		this.removeUserFromCache(user.getUsername());
-	}
-
-	@Override
-	public void removeUserFromCache(String username) {
-		this.cache.remove(username);
-	}
-
-	public void setCache(Ehcache cache) {
-		this.cache = cache;
-	}
-
-}