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Merge pull request #54 from instana/Informix_QueryOptimization
Informix query optimization
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108 changes: 108 additions & 0 deletions
108
.../main/java/com/instana/dc/rdb/impl/informix/metric/collection/MetricsDataQueryConfig.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,108 @@ | ||
| /* | ||
| * (c) Copyright IBM Corp. 2024 | ||
| * (c) Copyright Instana Inc. | ||
| */ | ||
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| package com.instana.dc.rdb.impl.informix.metric.collection; | ||
| import static com.instana.dc.rdb.DbDcUtil.getMetricWithSql; | ||
| import static com.instana.dc.rdb.DbDcUtil.getSimpleMetricWithSql; | ||
| import com.instana.dc.SimpleQueryResult; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
| import org.apache.commons.dbcp2.BasicDataSource; | ||
| import java.sql.Connection; | ||
| import java.util.ArrayList; | ||
| import java.util.List; | ||
| import java.util.HashMap; | ||
| import java.sql.SQLException; | ||
| import java.sql.Connection; | ||
| import java.sql.ResultSet; | ||
| import java.sql.Statement; | ||
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| /** | ||
| * This class which holds the meta data of a given metrics | ||
| */ | ||
| public class MetricsDataQueryConfig { | ||
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| private static final Logger logger = Logger.getLogger(MetricsDataQueryConfig.class.getName()); | ||
| private String query; | ||
| private final Class<?> returnType; | ||
| private String metricKey; | ||
| private String scriptName; | ||
| private final BasicDataSource dataSource; | ||
| private ResultSet rs; | ||
| private String[] attr; | ||
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| private HashMap<String,List<SimpleQueryResult>> results; | ||
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| public MetricsDataQueryConfig(String query, Class<?> returnType, BasicDataSource dataSource, String... attr) { | ||
| this.query = query; | ||
| this.returnType = returnType; | ||
| this.attr = attr; | ||
| this.dataSource = dataSource; | ||
| this.results = new HashMap<String,List<SimpleQueryResult>>(); | ||
| for (int attrIndex = 0;attrIndex<attr.length;attrIndex++) { | ||
| this.results.put(this.attr[attrIndex],new ArrayList<>()); | ||
| } | ||
| } | ||
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| public void fetchQueryResults() { | ||
| try (Connection connection = this.dataSource.getConnection()) { | ||
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| ResultSet rs = executeQuery(connection, this.query); | ||
| if (rs.isClosed()) { | ||
| logger.severe("getMetricWithSql: ResultSet is closed"); | ||
| } | ||
| while (rs.next()) { | ||
| Object obj = rs.getObject(2); | ||
| if (obj == null) { | ||
| obj = "null"; | ||
| } | ||
| if (obj instanceof String) { | ||
| obj = ((String) obj).trim(); | ||
| } | ||
| for(int attrIndex = 0;attrIndex<this.attr.length;attrIndex++) { | ||
| if(attrIndex == 1) { | ||
| continue; | ||
| } | ||
| SimpleQueryResult result = new SimpleQueryResult((Number) rs.getObject(attrIndex+1)); | ||
| result.setAttribute(this.attr[1], obj); | ||
| result.setKey(obj.toString()); | ||
| List<SimpleQueryResult> ls = this.results.get(this.attr[attrIndex]); | ||
| ls.add(result); | ||
| this.results.put(this.attr[attrIndex],ls); | ||
| } | ||
| } | ||
| } | ||
| catch (SQLException exp) { | ||
| logger.log(Level.SEVERE, "Unable to execute the sql command, Exception: " + exp); | ||
| } | ||
| } | ||
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| public static ResultSet executeQuery(Connection connection, String query) throws SQLException { | ||
| Statement statement = connection.createStatement(); | ||
| return statement.executeQuery(query); | ||
| } | ||
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| public String getMetricKey() { | ||
| return metricKey; | ||
| } | ||
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| public String[] getAttr() { | ||
| return attr; | ||
| } | ||
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| public String getQuery() { | ||
| return query; | ||
| } | ||
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| public Class<?> getReturnType() { | ||
| return returnType; | ||
| } | ||
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| public List<SimpleQueryResult> getResults(String key) { | ||
| return this.results.get(key); | ||
| } | ||
| } |