| /** |
| * 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.ambari.metrics.core.timeline.query; |
| |
| import java.util.List; |
| |
| import org.apache.ambari.metrics.core.timeline.aggregators.Function; |
| import org.apache.commons.collections.CollectionUtils; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.metrics2.sink.timeline.Precision; |
| |
| public class TopNCondition extends DefaultCondition{ |
| |
| private Integer topN; |
| private boolean isBottomN; |
| private Function topNFunction; |
| private static final Log LOG = LogFactory.getLog(TopNCondition.class); |
| |
| public TopNCondition(List<byte[]> uuids, List<String> metricNames, List<String> hostnames, String appId, |
| String instanceId, Long startTime, Long endTime, Precision precision, |
| Integer limit, boolean grouped, Integer topN, Function topNFunction, |
| boolean isBottomN) { |
| super(uuids, metricNames, hostnames, appId, instanceId, startTime, endTime, precision, limit, grouped); |
| this.topN = topN; |
| this.isBottomN = isBottomN; |
| this.topNFunction = topNFunction; |
| } |
| |
| @Override |
| public StringBuilder getConditionClause() { |
| |
| |
| if (!(isTopNHostCondition(metricNames, hostnames) || isTopNMetricCondition(metricNames, hostnames))) { |
| LOG.error("Unsupported TopN Operation requested. Query can have either multiple hosts or multiple metric names " + |
| "but not both."); |
| return null; |
| } |
| |
| StringBuilder sb = new StringBuilder(); |
| sb.append(" UUID IN ("); |
| sb.append(getTopNInnerQuery()); |
| sb.append(")"); |
| |
| boolean appendConjunction = true; |
| appendConjunction = append(sb, appendConjunction, getStartTime(), " SERVER_TIME >= ?"); |
| append(sb, appendConjunction, getEndTime(), " SERVER_TIME < ?"); |
| |
| return sb; |
| } |
| |
| public String getTopNInnerQuery() { |
| return String.format(PhoenixTransactSQL.TOP_N_INNER_SQL, |
| PhoenixTransactSQL.getTargetTableUsingPrecision(precision, CollectionUtils.isNotEmpty(hostnames)), |
| super.getConditionClause().toString(), getTopNOrderByClause(), topN); |
| } |
| |
| private String getTopNOrderByClause() { |
| |
| String orderByClause = getColumnSelect(this.topNFunction); |
| orderByClause += (isBottomN ? " ASC" : " DESC"); |
| return orderByClause; |
| } |
| |
| public static String getColumnSelect(Function topNFunction) { |
| String columnSelect = null; |
| if (topNFunction != null) { |
| switch (topNFunction.getReadFunction()) { |
| case AVG: |
| columnSelect = "ROUND(AVG(METRIC_SUM),2)"; |
| break; |
| case SUM: |
| columnSelect = "SUM(METRIC_SUM)"; |
| break; |
| default: |
| columnSelect = "MAX(METRIC_MAX)"; |
| break; |
| } |
| } |
| if (columnSelect == null) { |
| columnSelect = "MAX(METRIC_MAX)"; |
| } |
| return columnSelect; |
| } |
| |
| public boolean isTopNHostCondition() { |
| return isTopNHostCondition(metricNames, hostnames); |
| } |
| |
| public boolean isTopNMetricCondition() { |
| return isTopNMetricCondition(metricNames, hostnames); |
| } |
| |
| /** |
| * Check if this is a case of Top N hosts condition |
| * @param metricNames A list of Strings. |
| * @param hostnames A list of Strings. |
| * @return True if it is a Case of Top N Hosts (1 Metric and H hosts). |
| */ |
| public static boolean isTopNHostCondition(List<String> metricNames, List<String> hostnames) { |
| // Case 1 : 1 Metric, H hosts |
| // Select Top N or Bottom N host series based on 1 metric (max/avg/sum) |
| // Hostnames cannot be empty |
| // Only 1 metric allowed, without wildcards |
| return (CollectionUtils.isNotEmpty(hostnames) && metricNames.size() == 1 && !metricNamesHaveWildcard(metricNames)); |
| |
| } |
| |
| /** |
| * Check if this is a case of Top N metrics condition |
| * @param metricNames A list of Strings. |
| * @param hostnames A list of Strings. |
| * @return True if it is a Case of Top N Metrics (M Metric and 1 or 0 host). |
| */ |
| public static boolean isTopNMetricCondition(List<String> metricNames, List<String> hostnames) { |
| // Case 2 : M Metric names or Regex, 1 or No host |
| // Select Top N or Bottom N metric series based on metric values(max/avg/sum) |
| // MetricNames cannot be empty |
| // No host (aggregate) or 1 host allowed, without wildcards |
| return (CollectionUtils.isNotEmpty(metricNames) && (hostnames == null || hostnames.size() <= 1) && |
| !hostNamesHaveWildcard(hostnames)); |
| } |
| |
| public Integer getTopN() { |
| return topN; |
| } |
| |
| public void setTopN(Integer topN) { |
| this.topN = topN; |
| } |
| |
| public boolean isBottomN() { |
| return isBottomN; |
| } |
| |
| public void setIsBottomN(boolean isBottomN) { |
| this.isBottomN = isBottomN; |
| } |
| |
| public Function getTopNFunction() { |
| return topNFunction; |
| } |
| |
| public void setTopNFunction(Function topNFunction) { |
| this.topNFunction = topNFunction; |
| } |
| } |