com.mysql.cj.PerConnectionLRUFactory Maven / Gradle / Ivy
/*
* Copyright (c) 2012, 2020, Oracle and/or its affiliates.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License, version 2.0, as published by the
* Free Software Foundation.
*
* This program is also distributed with certain software (including but not
* limited to OpenSSL) that is licensed under separate terms, as designated in a
* particular file or component or in included license documentation. The
* authors of MySQL hereby grant you an additional permission to link the
* program and your derivative works with the separately licensed software that
* they have included with MySQL.
*
* Without limiting anything contained in the foregoing, this file, which is
* part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
* version 1.0, a copy of which can be found at
* http://oss.oracle.com/licenses/universal-foss-exception.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
* for more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package com.mysql.cj;
import java.util.Set;
import com.mysql.cj.util.LRUCache;
public class PerConnectionLRUFactory implements CacheAdapterFactory {
public CacheAdapter getInstance(Object syncMutex, String url, int cacheMaxSize, int maxKeySize) {
return new PerConnectionLRU(syncMutex, cacheMaxSize, maxKeySize);
}
class PerConnectionLRU implements CacheAdapter {
private final int cacheSqlLimit;
private final LRUCache cache;
private final Object syncMutex;
protected PerConnectionLRU(Object syncMutex, int cacheMaxSize, int maxKeySize) {
final int cacheSize = cacheMaxSize;
this.cacheSqlLimit = maxKeySize;
this.cache = new LRUCache<>(cacheSize);
this.syncMutex = syncMutex;
}
public ParseInfo get(String key) {
if (key == null || key.length() > this.cacheSqlLimit) {
return null;
}
synchronized (this.syncMutex) {
return this.cache.get(key);
}
}
public void put(String key, ParseInfo value) {
if (key == null || key.length() > this.cacheSqlLimit) {
return;
}
synchronized (this.syncMutex) {
this.cache.put(key, value);
}
}
public void invalidate(String key) {
synchronized (this.syncMutex) {
this.cache.remove(key);
}
}
public void invalidateAll(Set keys) {
synchronized (this.syncMutex) {
for (String key : keys) {
this.cache.remove(key);
}
}
}
public void invalidateAll() {
synchronized (this.syncMutex) {
this.cache.clear();
}
}
}
}