/*
* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
*
* 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<
String,
ParseInfo> {
public
CacheAdapter<
String,
ParseInfo>
getInstance(
Object syncMutex,
String url, int
cacheMaxSize, int
maxKeySize) {
return new
PerConnectionLRU(
syncMutex,
cacheMaxSize,
maxKeySize);
}
class
PerConnectionLRU implements
CacheAdapter<
String,
ParseInfo> {
private final int
cacheSqlLimit;
private final
LRUCache<
String,
ParseInfo>
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<
String>
keys) {
synchronized (this.
syncMutex) {
for (
String key :
keys) {
this.
cache.
remove(
key);
}
}
}
public void
invalidateAll() {
synchronized (this.
syncMutex) {
this.
cache.
clear();
}
}
}
}