| /* |
| * 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.hadoop.chukwa.hicc; |
| |
| |
| import java.util.TreeMap; |
| import java.util.HashMap; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.sql.*; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.chukwa.util.ExceptionUtil; |
| |
| public class DatasetMapper { |
| private String jdbc; |
| private static Log log = LogFactory.getLog(DatasetMapper.class); |
| private TreeMap<String, TreeMap<String, Double>> dataset; |
| private List<String> labels; |
| |
| public DatasetMapper(String jdbc) { |
| this.jdbc = jdbc; |
| this.dataset = new TreeMap<String, TreeMap<String, Double>>(); |
| this.labels = new ArrayList<String>(); |
| } |
| |
| public void execute(String query, boolean groupBySecondColumn, |
| boolean calculateSlope, String formatTime, List<Object> parameters) { |
| dataset.clear(); |
| try { |
| // The newInstance() call is a work around for some |
| // broken Java implementations |
| org.apache.hadoop.chukwa.util.DriverManagerUtil.loadDriver().newInstance(); |
| } catch (Exception ex) { |
| log.error("failed to load driver", ex); |
| // handle the error |
| } |
| Connection conn = null; |
| PreparedStatement stmt = null; |
| ResultSet rs = null; |
| labels.clear(); |
| double max = 0.0; |
| long timeWindowSize=0; |
| long previousTime=0; |
| try { |
| conn = org.apache.hadoop.chukwa.util.DriverManagerUtil.getConnection(jdbc); |
| stmt = conn.prepareStatement(query); |
| if(query.indexOf("?")!=-1) { |
| for(int i=0;i<parameters.size();i++) { |
| int index = i+1; |
| stmt.setObject(index,parameters.get(i)); |
| } |
| } |
| // rs = stmt.executeQuery(query); |
| if (stmt.execute()) { |
| rs = stmt.getResultSet(); |
| ResultSetMetaData rmeta = rs.getMetaData(); |
| int col = rmeta.getColumnCount(); |
| double[] previousArray = new double[col + 1]; |
| for (int k = 0; k < col; k++) { |
| previousArray[k] = 0.0; |
| } |
| int i = 0; |
| java.util.TreeMap<String, Double> data = null; |
| HashMap<String, Double> previousHash = new HashMap<String, Double>(); |
| HashMap<String, Integer> xAxisMap = new HashMap<String, Integer>(); |
| while (rs.next()) { |
| String label = ""; |
| if (rmeta.getColumnType(1) == java.sql.Types.TIMESTAMP) { |
| long time = rs.getTimestamp(1).getTime(); |
| if(timeWindowSize==0) { |
| timeWindowSize=1; |
| previousTime=time; |
| } else if(time!=previousTime) { |
| timeWindowSize=(time-previousTime)/60000; |
| previousTime=time; |
| } |
| label = "" + time; |
| } else { |
| label = rs.getString(1); |
| } |
| if (!xAxisMap.containsKey(label)) { |
| xAxisMap.put(label, i); |
| labels.add(label); |
| i++; |
| } |
| if (groupBySecondColumn) { |
| String item = rs.getString(2); |
| // Get the data from the row using the series column |
| for (int j = 3; j <= col; j++) { |
| item = rs.getString(2) + " " + rmeta.getColumnName(j); |
| data = dataset.get(item); |
| if (data == null) { |
| data = new java.util.TreeMap<String, Double>(); |
| } |
| if (calculateSlope) { |
| double current = rs.getDouble(j); |
| double tmp = 0L; |
| if (data.size() > 1) { |
| tmp = (current - previousHash.get(item).doubleValue())/timeWindowSize; |
| if(timeWindowSize<=0) { |
| tmp = Double.NaN; |
| } |
| } else { |
| tmp = 0; |
| } |
| if (tmp < 0) { |
| tmp = Double.NaN; |
| } |
| previousHash.put(item, current); |
| if (tmp > max) { |
| max = tmp; |
| } |
| data.put(label, tmp); |
| } else { |
| double current = rs.getDouble(j); |
| if (current > max) { |
| max = current; |
| } |
| data.put(label, current); |
| } |
| dataset.put(item, data); |
| } |
| } else { |
| for (int j = 2; j <= col; j++) { |
| String item = rmeta.getColumnName(j); |
| // Get the data from the row using the column name |
| double current = rs.getDouble(j); |
| if (current > max) { |
| max = current; |
| } |
| data = dataset.get(item); |
| if (data == null) { |
| data = new java.util.TreeMap<String, Double>(); |
| } |
| if (calculateSlope) { |
| double tmp = current; |
| if (data.size() > 1) { |
| tmp = (tmp - previousArray[j])/timeWindowSize; |
| if(timeWindowSize<=0) { |
| tmp = Double.NaN; |
| } |
| } else { |
| tmp = 0.0; |
| } |
| if (tmp < 0) { |
| tmp = Double.NaN; |
| } |
| previousArray[j] = current; |
| data.put(label, tmp); |
| } else { |
| data.put(label, current); |
| } |
| dataset.put(item, data); |
| } |
| } |
| } |
| } else { |
| log.error("query is not executed."); |
| } |
| // Now do something with the ResultSet .... |
| } catch (SQLException ex) { |
| // handle any errors |
| log.error("SQLException: " + ex.getMessage() + " on query: " + query); |
| log.error("SQLState: " + ex.getSQLState()); |
| log.error("VendorError: " + ex.getErrorCode()); |
| } catch (Exception ex) { |
| log.debug(ExceptionUtil.getStackTrace(ex)); |
| } finally { |
| // it is a good idea to release |
| // resources in a finally{} block |
| // in reverse-order of their creation |
| // if they are no-longer needed |
| if (rs != null) { |
| try { |
| rs.close(); |
| } catch (SQLException sqlEx) { |
| log.debug(ExceptionUtil.getStackTrace(sqlEx)); |
| } |
| rs = null; |
| } |
| if (stmt != null) { |
| try { |
| stmt.close(); |
| } catch (SQLException sqlEx) { |
| log.debug(ExceptionUtil.getStackTrace(sqlEx)); |
| } |
| stmt = null; |
| } |
| if (conn != null) { |
| try { |
| conn.close(); |
| } catch (SQLException sqlEx) { |
| log.debug(ExceptionUtil.getStackTrace(sqlEx)); |
| } |
| conn = null; |
| } |
| } |
| } |
| |
| public List<String> getXAxisMap() { |
| return labels; |
| } |
| |
| public TreeMap<String, TreeMap<String, Double>> getDataset() { |
| return dataset; |
| } |
| } |