Java tutorial
/* * Druid - a distributed column store. * Copyright (C) 2013 Metamarkets Group Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * 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 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 Street, Fifth Floor, Boston, MA 02110-1301, USA. */ package com.metamx.druid.realtime.firehose; import com.fasterxml.jackson.annotation.JsonCreator; import com.fasterxml.jackson.annotation.JsonProperty; import com.google.common.collect.ImmutableList; import com.google.common.collect.Lists; import com.google.common.collect.Maps; import com.maxmind.geoip2.DatabaseReader; import com.maxmind.geoip2.exception.GeoIp2Exception; import com.maxmind.geoip2.model.Omni; import com.metamx.common.logger.Logger; import com.metamx.druid.input.InputRow; import org.apache.commons.io.FileUtils; import org.joda.time.DateTime; import java.io.File; import java.io.IOException; import java.net.InetAddress; import java.net.URL; import java.net.UnknownHostException; import java.util.List; import java.util.Map; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.util.zip.GZIPInputStream; class WikipediaIrcDecoder implements IrcDecoder { static final Logger log = new Logger(WikipediaIrcDecoder.class); final DatabaseReader geoLookup; static final Pattern pattern = Pattern.compile( "\\x0314\\[\\[\\x0307(.+?)\\x0314\\]\\]\\x034 (.*?)\\x0310.*\\x0302(http.+?)\\x03.+\\x0303(.+?)\\x03.+\\x03 (\\(([+-]\\d+)\\).*|.+) \\x0310(.+)\\x03"); static final Pattern ipPattern = Pattern.compile("\\d+.\\d+.\\d+.\\d+"); static final Pattern shortnamePattern = Pattern.compile("#(\\w\\w)\\..*"); static final List<String> dimensionList = Lists.newArrayList("page", "language", "user", "unpatrolled", "newPage", "robot", "anonymous", "namespace", "continent", "country", "region", "city"); final Map<String, Map<String, String>> namespaces; public WikipediaIrcDecoder(Map<String, Map<String, String>> namespaces) { this(namespaces, null); } @JsonCreator public WikipediaIrcDecoder(@JsonProperty("namespaces") Map<String, Map<String, String>> namespaces, @JsonProperty("geoIpDatabase") String geoIpDatabase) { if (namespaces == null) { namespaces = Maps.newHashMap(); } this.namespaces = namespaces; File geoDb; if (geoIpDatabase != null) { geoDb = new File(geoIpDatabase); } else { try { String tmpDir = System.getProperty("java.io.tmpdir"); geoDb = new File(tmpDir, this.getClass().getCanonicalName() + ".GeoLite2-City.mmdb"); if (!geoDb.exists()) { log.info("Downloading geo ip database to [%s]", geoDb); FileUtils.copyInputStreamToFile(new GZIPInputStream( new URL("http://geolite.maxmind.com/download/geoip/database/GeoLite2-City.mmdb.gz") .openStream()), geoDb); } } catch (IOException e) { throw new RuntimeException("Unable to download geo ip database [%s]", e); } } try { geoLookup = new DatabaseReader(geoDb); } catch (IOException e) { throw new RuntimeException("Unable to open geo ip lookup database", e); } } @Override public InputRow decodeMessage(final DateTime timestamp, String channel, String msg) { final Map<String, String> dimensions = Maps.newHashMap(); final Map<String, Float> metrics = Maps.newHashMap(); Matcher m = pattern.matcher(msg); if (!m.matches()) { throw new IllegalArgumentException("Invalid input format"); } Matcher shortname = shortnamePattern.matcher(channel); if (shortname.matches()) { dimensions.put("language", shortname.group(1)); } String page = m.group(1); String pageUrl = page.replaceAll("\\s", "_"); dimensions.put("page", pageUrl); String user = m.group(4); Matcher ipMatch = ipPattern.matcher(user); boolean anonymous = ipMatch.matches(); if (anonymous) { try { final InetAddress ip = InetAddress.getByName(ipMatch.group()); final Omni lookup = geoLookup.omni(ip); dimensions.put("continent", lookup.getContinent().getName()); dimensions.put("country", lookup.getCountry().getName()); dimensions.put("region", lookup.getMostSpecificSubdivision().getName()); dimensions.put("city", lookup.getCity().getName()); } catch (UnknownHostException e) { log.error(e, "invalid ip [%s]", ipMatch.group()); } catch (IOException e) { log.error(e, "error looking up geo ip"); } catch (GeoIp2Exception e) { log.error(e, "error looking up geo ip"); } } dimensions.put("user", user); final String flags = m.group(2); dimensions.put("unpatrolled", Boolean.toString(flags.contains("!"))); dimensions.put("newPage", Boolean.toString(flags.contains("N"))); dimensions.put("robot", Boolean.toString(flags.contains("B"))); dimensions.put("anonymous", Boolean.toString(anonymous)); String[] parts = page.split(":"); if (parts.length > 1 && !parts[1].startsWith(" ")) { Map<String, String> channelNamespaces = namespaces.get(channel); if (channelNamespaces != null && channelNamespaces.containsKey(parts[0])) { dimensions.put("namespace", channelNamespaces.get(parts[0])); } else { dimensions.put("namespace", "wikipedia"); } } else { dimensions.put("namespace", "article"); } float delta = m.group(6) != null ? Float.parseFloat(m.group(6)) : 0; metrics.put("delta", delta); metrics.put("added", Math.max(delta, 0)); metrics.put("deleted", Math.min(delta, 0)); return new InputRow() { @Override public List<String> getDimensions() { return dimensionList; } @Override public long getTimestampFromEpoch() { return timestamp.getMillis(); } @Override public List<String> getDimension(String dimension) { final String value = dimensions.get(dimension); if (value != null) { return ImmutableList.of(value); } else { return ImmutableList.of(); } } @Override public float getFloatMetric(String metric) { return metrics.get(metric); } @Override public String toString() { return "WikipediaRow{" + "timestamp=" + timestamp + ", dimensions=" + dimensions + ", metrics=" + metrics + '}'; } }; } }