| 3 | | public static void creatTable(String table) throws IOException{ |
| 4 | | HConnection conn = HConnectionManager.getConnection(conf); |
| 5 | | HBaseAdmin admin = new HBaseAdmin(conf); |
| 6 | | if(!admin.tableExists(new Text(table))){ |
| 7 | | System.out.println("1. " + table + " table creating ... please wait"); |
| 8 | | HTableDescriptor tableDesc = new HTableDescriptor(table); |
| 9 | | tableDesc.addFamily(new HColumnDescriptor("http:")); |
| 10 | | tableDesc.addFamily(new HColumnDescriptor("url:")); |
| 11 | | tableDesc.addFamily(new HColumnDescriptor("referrer:")); |
| 12 | | admin.createTable(tableDesc); |
| 13 | | } else { |
| 14 | | System.out.println("1. " + table + " table already exists."); |
| 15 | | } |
| 16 | | System.out.println("2. access_log files fetching using map/reduce"); |
| 17 | | } |
| 18 | | }}} |
| 19 | | |
| 20 | | |
| 21 | | {{{ |
| 22 | | public static class MapClass extends MapReduceBase implements |
| 23 | | Mapper<WritableComparable, Text, Text, Writable> { |
| 24 | | |
| 25 | | @Override |
| 26 | | public void configure(JobConf job) { |
| 27 | | tableName = job.get(TABLE, ""); |
| 28 | | } |
| 29 | | |
| 30 | | public void map(WritableComparable key, Text value, |
| 31 | | OutputCollector<Text, Writable> output, Reporter reporter) |
| 32 | | throws IOException { |
| 33 | | try { |
| 34 | | AccessLogParser log = new AccessLogParser(value.toString()); |
| 35 | | if(table==null) |
| 36 | | table = new HTable(conf, new Text(tableName)); |
| 37 | | long lockId = table.startUpdate(new Text(log.getIp())); |
| 38 | | table.put(lockId, new Text("http:protocol"), log.getProtocol().getBytes()); |
| 39 | | table.put(lockId, new Text("http:method"), log.getMethod().getBytes()); |
| 40 | | table.put(lockId, new Text("http:code"), log.getCode().getBytes()); |
| 41 | | table.put(lockId, new Text("http:bytesize"), log.getByteSize().getBytes()); |
| 42 | | table.put(lockId, new Text("http:agent"), log.getAgent().getBytes()); |
| 43 | | table.put(lockId, new Text("url:" + log.getUrl()), log.getReferrer().getBytes()); |
| 44 | | table.put(lockId, new Text("referrer:" + log.getReferrer()), log.getUrl().getBytes()); |
| 45 | | |
| 46 | | table.commit(lockId, log.getTimestamp()); |
| 47 | | } catch (ParseException e) { |
| 48 | | e.printStackTrace(); |
| 49 | | } catch (Exception e) { |
| 50 | | e.printStackTrace(); |
| 51 | | } |
| 52 | | } |
| 53 | | } |
| 54 | | |
| 55 | | }}} |
| 56 | | |
| 57 | | {{{ |
| 58 | | public static void runMapReduce(String table,String dir) throws IOException{ |
| 59 | | Path tempDir = new Path("log/temp"); |
| 60 | | Path InputDir = new Path(dir); |
| 61 | | FileSystem fs = FileSystem.get(conf); |
| 62 | | JobConf jobConf = new JobConf(conf, LogFetcher.class); |
| 63 | | jobConf.setJobName("apache log fetcher"); |
| 64 | | jobConf.set(TABLE, table); |
| 65 | | Path[] in = fs.listPaths(InputDir); |
| 66 | | if (fs.isFile(InputDir)) { |
| 67 | | jobConf.setInputPath(InputDir); |
| 68 | | } else { |
| 69 | | for (int i = 0; i < in.length; i++) { |
| 70 | | if (fs.isFile(in[i])) { |
| 71 | | jobConf.addInputPath(in[i]); |
| 72 | | } else { |
| 73 | | Path[] sub = fs.listPaths(in[i]); |
| 74 | | for (int j = 0; j < sub.length; j++) { |
| 75 | | if (fs.isFile(sub[j])) { |
| 76 | | jobConf.addInputPath(sub[j]); |
| 77 | | } |
| 78 | | } |
| 79 | | } |
| 80 | | } |
| 81 | | } |
| 82 | | jobConf.setOutputPath(tempDir); |
| 83 | | jobConf.setMapperClass(MapClass.class); |
| 84 | | |
| 85 | | JobClient client = new JobClient(jobConf); |
| 86 | | ClusterStatus cluster = client.getClusterStatus(); |
| 87 | | jobConf.setNumMapTasks(cluster.getMapTasks()); |
| 88 | | jobConf.setNumReduceTasks(0); |
| 89 | | |
| 90 | | JobClient.runJob(jobConf); |
| 91 | | fs.delete(tempDir); |
| 92 | | fs.close(); |
| 93 | | } |
| 94 | | |
| 95 | | }}} |
| | 3 | [http://hadoop.apache.org/hbase/docs/current/api/org/apache/hadoop/hbase/mapred/package-summary.html#examples hbase + mapreduce 用法] |
