| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 org.apache.apex.malhar.contrib.apachelog; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| |
| import org.apache.apex.malhar.lib.logs.InformationExtractor; |
| |
| import com.google.common.cache.Cache; |
| import com.google.common.cache.CacheBuilder; |
| |
| import net.sf.uadetector.ReadableUserAgent; |
| import net.sf.uadetector.UserAgentStringParser; |
| import net.sf.uadetector.service.UADetectorServiceFactory; |
| |
| /** |
| * An implementation of Information Extractor that extracts the browser and the OS from a user-agent string. |
| * <p> |
| * The user of this extractor needs to include the jars which contain these classes in DAGContext.LIBRARY_JARS |
| * |
| * net.sf.uadetector.UserAgentStringParser.class |
| * net.sf.uadetector.service.UADetectorServiceFactory.class |
| * net.sf.qualitycheck.Check.class |
| * @displayName User Agent Extractor |
| * @category Output |
| * @tags cache, extraction |
| * @since 0.9.4 |
| */ |
| public class UserAgentExtractor implements InformationExtractor |
| { |
| private static final long serialVersionUID = 201404221817L; |
| |
| public static class CachedUserAgentStringParser implements UserAgentStringParser |
| { |
| private final UserAgentStringParser parser = UADetectorServiceFactory.getCachingAndUpdatingParser(); |
| private final Cache<String, ReadableUserAgent> cache = CacheBuilder.newBuilder().maximumSize(100).expireAfterWrite(2, TimeUnit.HOURS).build(); |
| |
| @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(); |
| } |
| |
| } |
| |
| private transient UserAgentStringParser parser; |
| |
| @Override |
| public void setup() |
| { |
| parser = new CachedUserAgentStringParser(); |
| } |
| |
| @Override |
| public void teardown() |
| { |
| parser.shutdown(); |
| } |
| |
| @Override |
| public Map<String, Object> extractInformation(Object value) |
| { |
| Map<String, Object> m = new HashMap<String, Object>(); |
| ReadableUserAgent agent = parser.parse(value.toString()); |
| m.put("browser", agent.getName()); |
| m.put("os", agent.getOperatingSystem().getName()); |
| return m; |
| } |
| |
| } |