/*******************************************************************************
* Copyright 2013 André Rouél
*
* 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
*
* http://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 net.sf.uadetector.example;
import java.util.concurrent.TimeUnit;
import net.sf.uadetector.ReadableUserAgent;
import net.sf.uadetector.UserAgentStringParser;
import net.sf.uadetector.service.UADetectorServiceFactory;
import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;
public class CachedUserAgentStringParser implements UserAgentStringParser {
private final Cache<String, ReadableUserAgent> cache = CacheBuilder.newBuilder().maximumSize(100).expireAfterWrite(2, TimeUnit.HOURS)
.build();
private final UserAgentStringParser parser = UADetectorServiceFactory.getCachingAndUpdatingParser();
@Override
public String getDataVersion() {
return parser.getDataVersion();
}
@Override
public ReadableUserAgent parse(final String userAgentString) {
ReadableUserAgent result = cache.getIfPresent(userAgentString);
if (result == null) {
result = parser.parse(userAgentString);
cache.put(userAgentString, result);
}
return result;
}
@Override
public void shutdown() {
parser.shutdown();
}
}