Java tutorial
/** * Copyright (C) 2014-2015 LinkedIn Corp. (pinot-core@linkedin.com) * * Licensed 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 com.linkedin.pinot.query.executor; import com.linkedin.pinot.common.metrics.ServerMetrics; import com.linkedin.pinot.common.utils.JsonAssert; import com.linkedin.pinot.core.data.manager.offline.TableDataManagerProvider; import com.yammer.metrics.core.MetricsRegistry; import com.linkedin.pinot.util.TestUtils; import java.io.File; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.concurrent.TimeUnit; import org.apache.commons.configuration.PropertiesConfiguration; import org.apache.commons.io.FileUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.testng.annotations.AfterClass; import org.testng.annotations.BeforeClass; import org.testng.annotations.Test; import com.linkedin.pinot.common.query.ReduceService; import com.linkedin.pinot.common.request.AggregationInfo; import com.linkedin.pinot.common.request.BrokerRequest; import com.linkedin.pinot.common.request.InstanceRequest; import com.linkedin.pinot.common.request.QuerySource; import com.linkedin.pinot.common.response.BrokerResponseJSON; import com.linkedin.pinot.common.response.ServerInstance; import com.linkedin.pinot.common.segment.ReadMode; import com.linkedin.pinot.common.utils.DataTable; import com.linkedin.pinot.core.data.manager.config.FileBasedInstanceDataManagerConfig; import com.linkedin.pinot.core.data.manager.offline.FileBasedInstanceDataManager; import com.linkedin.pinot.core.indexsegment.IndexSegment; import com.linkedin.pinot.core.indexsegment.columnar.ColumnarSegmentLoader; import com.linkedin.pinot.core.indexsegment.generator.SegmentGeneratorConfig; import com.linkedin.pinot.core.query.executor.ServerQueryExecutorV1Impl; import com.linkedin.pinot.core.query.reduce.DefaultReduceService; import com.linkedin.pinot.core.segment.creator.SegmentIndexCreationDriver; import com.linkedin.pinot.core.segment.creator.impl.SegmentCreationDriverFactory; import com.linkedin.pinot.segments.v1.creator.SegmentTestUtils; public class DefaultReduceServiceTest { private final String SMALL_AVRO_DATA = "data/simpleData200001.avro"; private static File INDEXES_DIR = new File( FileUtils.getTempDirectory() + File.separator + "TestDefaultReduceServiceList"); private List<IndexSegment> _indexSegmentList = new ArrayList<IndexSegment>(); private static ServerQueryExecutorV1Impl _queryExecutor; private static final Logger LOGGER = LoggerFactory.getLogger(DefaultReduceServiceTest.class); public static final String PINOT_PROPERTIES = "pinot.properties"; private static ReduceService<BrokerResponseJSON> _reduceService = new DefaultReduceService(); @BeforeClass public void setup() throws Exception { TableDataManagerProvider.setServerMetrics(new ServerMetrics(new MetricsRegistry())); File confDir = new File(QueryExecutorTest.class.getClassLoader().getResource("conf").toURI()); setupSegmentList(2); FileUtils.deleteDirectory(new File("/tmp/pinot/test1")); // ServerBuilder serverBuilder = new ServerBuilder(confDir.getAbsolutePath()); String configFilePath = confDir.getAbsolutePath(); // build _serverConf PropertiesConfiguration serverConf = new PropertiesConfiguration(); serverConf.setDelimiterParsingDisabled(false); serverConf.load(new File(configFilePath, PINOT_PROPERTIES)); FileBasedInstanceDataManager instanceDataManager1 = FileBasedInstanceDataManager.getInstanceDataManager(); instanceDataManager1 .init(new FileBasedInstanceDataManagerConfig(serverConf.subset("pinot.server.instance"))); instanceDataManager1.start(); for (int i = 0; i < 2; ++i) { instanceDataManager1.getTableDataManager("midas"); instanceDataManager1.getTableDataManager("midas").addSegment(_indexSegmentList.get(i)); } _queryExecutor = new ServerQueryExecutorV1Impl(); _queryExecutor.init(serverConf.subset("pinot.server.query.executor"), instanceDataManager1, new ServerMetrics(new MetricsRegistry())); } @AfterClass public void tearDown() { if (INDEXES_DIR.exists()) { FileUtils.deleteQuietly(INDEXES_DIR); } for (IndexSegment segment : _indexSegmentList) { segment.destroy(); } _indexSegmentList.clear(); } private void setupSegmentList(int numberOfSegments) throws Exception { final String filePath = TestUtils .getFileFromResourceUrl(getClass().getClassLoader().getResource(SMALL_AVRO_DATA)); _indexSegmentList.clear(); if (INDEXES_DIR.exists()) { FileUtils.deleteQuietly(INDEXES_DIR); } INDEXES_DIR.mkdir(); for (int i = 0; i < numberOfSegments; ++i) { final File segmentDir = new File(INDEXES_DIR, "segment_" + i); final SegmentGeneratorConfig config = SegmentTestUtils.getSegmentGenSpecWithSchemAndProjectedColumns( new File(filePath), segmentDir, "dim" + i, TimeUnit.DAYS, "midas"); config.setSegmentNamePostfix(String.valueOf(i)); final SegmentIndexCreationDriver driver = SegmentCreationDriverFactory.get(null); driver.init(config); driver.build(); File parent = new File(INDEXES_DIR, "segment_" + String.valueOf(i)); String segmentName = parent.list()[0]; _indexSegmentList.add(ColumnarSegmentLoader.load(new File(parent, segmentName), ReadMode.mmap)); System.out.println("built at : " + segmentDir.getAbsolutePath()); } } @Test public void testCountQuery() { BrokerRequest brokerRequest = getCountQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"800004\",\"function\":\"count_star\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); //Assert.assertEquals(true, false); } } @Test public void testSumQuery() { BrokerRequest brokerRequest = getSumQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"80000400000.00000\",\"function\":\"sum_met\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testMaxQuery() { BrokerRequest brokerRequest = getMaxQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"200000.00000\",\"function\":\"max_met\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testMinQuery() { BrokerRequest brokerRequest = getMinQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"0.00000\",\"function\":\"min_met\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testAvgQuery() { BrokerRequest brokerRequest = getAvgQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"100000.00000\",\"function\":\"avg_met\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testDistinctCountQuery0() { BrokerRequest brokerRequest = getDistinctCountQuery("dim0"); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"10\",\"function\":\"distinctCount_dim0\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testDistinctCountQuery1() { BrokerRequest brokerRequest = getDistinctCountQuery("dim1"); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { DataTable instanceResponse1 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:0000"), instanceResponse1); DataTable instanceResponse2 = _queryExecutor.processQuery(instanceRequest); instanceResponseMap.put(new ServerInstance("localhost:1111"), instanceResponse2); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"100\",\"function\":\"distinctCount_dim1\"}"); LOGGER.info("Time used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } @Test public void testMultiAggregationQuery() { BrokerRequest brokerRequest = getMultiAggregationQuery(); QuerySource querySource = new QuerySource(); querySource.setTableName("midas"); brokerRequest.setQuerySource(querySource); InstanceRequest instanceRequest = new InstanceRequest(0, brokerRequest); instanceRequest.setSearchSegments(new ArrayList<String>()); for (IndexSegment segment : _indexSegmentList) { instanceRequest.addToSearchSegments(segment.getSegmentName()); } Map<ServerInstance, DataTable> instanceResponseMap = new HashMap<ServerInstance, DataTable>(); try { instanceResponseMap.put(new ServerInstance("localhost:0000"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:1111"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:2222"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:3333"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:4444"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:5555"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:6666"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:7777"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:8888"), _queryExecutor.processQuery(instanceRequest)); instanceResponseMap.put(new ServerInstance("localhost:9999"), _queryExecutor.processQuery(instanceRequest)); BrokerResponseJSON brokerResponse = (BrokerResponseJSON) _reduceService.reduceOnDataTable(brokerRequest, instanceResponseMap); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(0)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(0).toString(), "{\"value\":\"4000020\",\"function\":\"count_star\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(1)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(1).toString(), "{\"value\":\"400002000000.00000\",\"function\":\"sum_met\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(2)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(2).toString(), "{\"value\":\"200000.00000\",\"function\":\"max_met\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(3)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(3).toString(), "{\"value\":\"0.00000\",\"function\":\"min_met\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(4)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(4).toString(), "{\"value\":\"100000.00000\",\"function\":\"avg_met\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(5)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(5).toString(), "{\"value\":\"10\",\"function\":\"distinctCount_dim0\"}"); LOGGER.info("BrokerResponse is " + brokerResponse.getAggregationResults().get(6)); JsonAssert.assertEqualsIgnoreOrder(brokerResponse.getAggregationResults().get(6).toString(), "{\"value\":\"100\",\"function\":\"distinctCount_dim1\"}"); LOGGER.info("Time Used for BrokerResponse is " + brokerResponse.getTimeUsedMs()); LOGGER.info("Num Docs Scanned is " + brokerResponse.getNumDocsScanned()); LOGGER.info("Total Docs for BrokerResponse is " + brokerResponse.getTotalDocs()); System.out.println(brokerResponse.toJson()); } catch (Exception e) { e.printStackTrace(); // Should never happen throw new RuntimeException(e.toString(), e); } } private BrokerRequest getCountQuery() { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getCountAggregationInfo(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getSumQuery() { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getSumAggregationInfo(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getMaxQuery() { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getMaxAggregationInfo(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getMinQuery() { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getMinAggregationInfo(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getAvgQuery() { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getAvgAggregationInfo(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getDistinctCountQuery(String dim) { BrokerRequest query = new BrokerRequest(); AggregationInfo aggregationInfo = getDistinctCountAggregationInfo(dim); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(aggregationInfo); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private BrokerRequest getMultiAggregationQuery() { BrokerRequest query = new BrokerRequest(); List<AggregationInfo> aggregationsInfo = new ArrayList<AggregationInfo>(); aggregationsInfo.add(getCountAggregationInfo()); aggregationsInfo.add(getSumAggregationInfo()); aggregationsInfo.add(getMaxAggregationInfo()); aggregationsInfo.add(getMinAggregationInfo()); aggregationsInfo.add(getAvgAggregationInfo()); aggregationsInfo.add(getDistinctCountAggregationInfo("dim0")); aggregationsInfo.add(getDistinctCountAggregationInfo("dim1")); query.setAggregationsInfo(aggregationsInfo); query.setFilterQuery(null); return query; } private AggregationInfo getCountAggregationInfo() { String type = "count"; Map<String, String> params = new HashMap<String, String>(); params.put("column", "met"); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } private AggregationInfo getSumAggregationInfo() { String type = "sum"; Map<String, String> params = new HashMap<String, String>(); params.put("column", "met"); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } private AggregationInfo getMaxAggregationInfo() { String type = "max"; Map<String, String> params = new HashMap<String, String>(); params.put("column", "met"); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } private AggregationInfo getMinAggregationInfo() { String type = "min"; Map<String, String> params = new HashMap<String, String>(); params.put("column", "met"); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } private AggregationInfo getAvgAggregationInfo() { String type = "avg"; Map<String, String> params = new HashMap<String, String>(); params.put("column", "met"); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } private AggregationInfo getDistinctCountAggregationInfo(String dim) { String type = "distinctCount"; Map<String, String> params = new HashMap<String, String>(); params.put("column", dim); AggregationInfo aggregationInfo = new AggregationInfo(); aggregationInfo.setAggregationType(type); aggregationInfo.setAggregationParams(params); return aggregationInfo; } }