|
| 1 | +package io.spoud.kcc.aggregator.olap; |
| 2 | + |
| 3 | +import com.fasterxml.jackson.core.JsonProcessingException; |
| 4 | +import com.fasterxml.jackson.databind.ObjectMapper; |
| 5 | +import io.quarkus.logging.Log; |
| 6 | +import io.quarkus.runtime.Startup; |
| 7 | +import io.quarkus.scheduler.Scheduled; |
| 8 | +import io.spoud.kcc.data.AggregatedDataWindowed; |
| 9 | +import jakarta.annotation.PostConstruct; |
| 10 | +import jakarta.enterprise.context.ApplicationScoped; |
| 11 | +import lombok.RequiredArgsConstructor; |
| 12 | +import org.apache.commons.codec.digest.DigestUtils; |
| 13 | + |
| 14 | +import java.nio.file.Path; |
| 15 | +import java.sql.Connection; |
| 16 | +import java.sql.DriverManager; |
| 17 | +import java.sql.PreparedStatement; |
| 18 | +import java.sql.SQLException; |
| 19 | +import java.time.Duration; |
| 20 | +import java.time.Instant; |
| 21 | +import java.time.ZoneOffset; |
| 22 | +import java.util.HashSet; |
| 23 | +import java.util.Optional; |
| 24 | +import java.util.Queue; |
| 25 | +import java.util.Set; |
| 26 | +import java.util.UUID; |
| 27 | +import java.util.concurrent.ConcurrentLinkedQueue; |
| 28 | + |
| 29 | +@Startup |
| 30 | +@RequiredArgsConstructor |
| 31 | +@ApplicationScoped |
| 32 | +public class AggregatedMetricsRepository { |
| 33 | + private final OlapConfigProperties olapConfig; |
| 34 | + private final Queue<AggregatedDataWindowed> rowBuffer = new ConcurrentLinkedQueue<>(); |
| 35 | + private final ObjectMapper OBJECT_MAPPER = new ObjectMapper(); |
| 36 | + private Connection connection; |
| 37 | + |
| 38 | + private static void ensureIdentifierIsSafe(String identifier) { |
| 39 | + if (!identifier.matches("^[a-zA-Z0-9_]+$")) { |
| 40 | + throw new IllegalArgumentException("Invalid identifier. Expected only letters, numbers, and underscores"); |
| 41 | + } |
| 42 | + } |
| 43 | + |
| 44 | + @PostConstruct |
| 45 | + public void init() { |
| 46 | + if (olapConfig.enabled()) { |
| 47 | + getConnection().ifPresent((conn) -> { |
| 48 | + try { |
| 49 | + createTableIfNotExists(conn); |
| 50 | + } catch (SQLException e) { |
| 51 | + Log.error("Failed to create OLAP table", e); |
| 52 | + } |
| 53 | + }); |
| 54 | + } else { |
| 55 | + Log.info("OLAP module is disabled."); |
| 56 | + } |
| 57 | + } |
| 58 | + |
| 59 | + private Optional<Connection> getConnection() { |
| 60 | + try { |
| 61 | + if (connection == null) { |
| 62 | + Class.forName("org.duckdb.DuckDBDriver"); // force load the driver |
| 63 | + connection = DriverManager.getConnection(olapConfig.databaseUrl()); |
| 64 | + } |
| 65 | + return Optional.of(connection); |
| 66 | + } catch (Exception e) { |
| 67 | + Log.warn("Failed to get read-write connection to OLAP database", e); |
| 68 | + return Optional.empty(); |
| 69 | + } |
| 70 | + } |
| 71 | + |
| 72 | + private void createTableIfNotExists(Connection connection) throws SQLException { |
| 73 | + try (var statement = connection.createStatement()) { |
| 74 | + statement.execute(""" |
| 75 | + CREATE TABLE IF NOT EXISTS main.aggregated_data ( |
| 76 | + start_time TIMESTAMPTZ NOT NULL, |
| 77 | + end_time TIMESTAMPTZ NOT NULL, |
| 78 | + initial_metric_name VARCHAR NOT NULL, |
| 79 | + entity_type VARCHAR NOT NULL, |
| 80 | + name VARCHAR NOT NULL, |
| 81 | + tags JSON NOT NULL, |
| 82 | + context JSON NOT NULL, |
| 83 | + value DOUBLE NOT NULL, |
| 84 | + target VARCHAR NOT NULL, |
| 85 | + id VARCHAR PRIMARY KEY |
| 86 | + ) |
| 87 | + """); |
| 88 | + Log.infof("Created OLAP DB table: main.aggregated_data"); |
| 89 | + } |
| 90 | + } |
| 91 | + |
| 92 | + @Scheduled(every = "${cc.olap.database.flush-interval.seconds}s") |
| 93 | + public void flushToDb() { |
| 94 | + getConnection().ifPresent((conn) -> { |
| 95 | + var skipped = 0; |
| 96 | + var count = 0; |
| 97 | + var startTime = Instant.now(); |
| 98 | + try (var stmt = conn.prepareStatement("INSERT OR REPLACE INTO main.aggregated_data VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)")) { |
| 99 | + for (var metric = rowBuffer.poll(); metric != null; metric = rowBuffer.poll()) { |
| 100 | + Log.debugv("Ingesting metric: {0}", metric); |
| 101 | + var start = metric.getStartTime(); |
| 102 | + var end = metric.getEndTime(); |
| 103 | + var tags = ""; |
| 104 | + var context = ""; |
| 105 | + try { |
| 106 | + tags = OBJECT_MAPPER.writeValueAsString(metric.getTags()); |
| 107 | + context = OBJECT_MAPPER.writeValueAsString(metric.getContext()); |
| 108 | + } catch (JsonProcessingException e) { |
| 109 | + Log.warn("Failed to serialize tags or context. Skipping metric...", e); |
| 110 | + skipped++; |
| 111 | + continue; |
| 112 | + } |
| 113 | + var target = metric.getContext().getOrDefault("topic", "unknown"); // for now, the only possible target is the topic |
| 114 | + var id = DigestUtils.sha1Hex(String.valueOf(start) + |
| 115 | + end + |
| 116 | + metric.getInitialMetricName() + |
| 117 | + metric.getEntityType().name() + |
| 118 | + metric.getName() + |
| 119 | + tags + |
| 120 | + context + |
| 121 | + target); |
| 122 | + stmt.setObject(1, start.atOffset(ZoneOffset.UTC)); |
| 123 | + stmt.setObject(2, end.atOffset(ZoneOffset.UTC)); |
| 124 | + stmt.setString(3, metric.getInitialMetricName()); |
| 125 | + stmt.setString(4, metric.getEntityType().name()); |
| 126 | + stmt.setString(5, metric.getName()); |
| 127 | + stmt.setString(6, tags); |
| 128 | + stmt.setString(7, context); |
| 129 | + stmt.setDouble(8, metric.getValue()); |
| 130 | + stmt.setString(9, target); |
| 131 | + stmt.setString(10, id); |
| 132 | + stmt.addBatch(); |
| 133 | + count++; |
| 134 | + } |
| 135 | + stmt.executeBatch(); |
| 136 | + } catch (SQLException e) { |
| 137 | + Log.error("Failed to ingest ALL metrics to OLAP database", e); |
| 138 | + return; |
| 139 | + } |
| 140 | + if (count != 0 || skipped != 0) { |
| 141 | + Log.infof("Ingested %d metrics. Skipped %d metrics. Duration: %s", count, skipped, Duration.between(startTime, Instant.now())); |
| 142 | + } |
| 143 | + }); |
| 144 | + } |
| 145 | + |
| 146 | + public void insertRow(AggregatedDataWindowed row) { |
| 147 | + if (!olapConfig.enabled()) { |
| 148 | + return; |
| 149 | + } |
| 150 | + rowBuffer.add(row); |
| 151 | + if (rowBuffer.size() >= olapConfig.databaseMaxBufferedRows()) { |
| 152 | + flushToDb(); |
| 153 | + } |
| 154 | + } |
| 155 | + |
| 156 | + public Set<String> getAllTagKeys() { |
| 157 | + return getAllJsonKeys("tags"); |
| 158 | + } |
| 159 | + |
| 160 | + public Set<String> getAllContextKeys() { |
| 161 | + return getAllJsonKeys("context"); |
| 162 | + } |
| 163 | + |
| 164 | + public Set<String> getAllMetrics() { |
| 165 | + return getConnection() |
| 166 | + .map(conn -> { |
| 167 | + try (var statement = conn.prepareStatement("SELECT DISTINCT initial_metric_name FROM main.aggregated_data")) { |
| 168 | + var result = statement.executeQuery(); |
| 169 | + var metrics = new HashSet<String>(); |
| 170 | + while (result.next()) { |
| 171 | + metrics.add(result.getString(1)); |
| 172 | + } |
| 173 | + return metrics; |
| 174 | + } catch (SQLException e) { |
| 175 | + Log.error("Failed to get all metrics", e); |
| 176 | + } |
| 177 | + return new HashSet<String>(); |
| 178 | + }) |
| 179 | + .orElse(new HashSet<>()); |
| 180 | + } |
| 181 | + |
| 182 | + private Set<String> getAllJsonKeys(String column) { |
| 183 | + return getConnection() |
| 184 | + .map(conn -> { |
| 185 | + try (var statement = conn.prepareStatement("SELECT unnest(json_keys( " + column + " )) FROM main.aggregated_data")) { |
| 186 | + return getStatementResultAsStrings(statement, true); |
| 187 | + } catch (Exception e) { |
| 188 | + Log.error("Failed to get keys of column: " + column, e); |
| 189 | + } |
| 190 | + return new HashSet<String>(); |
| 191 | + }) |
| 192 | + .orElse(new HashSet<>()); |
| 193 | + } |
| 194 | + |
| 195 | + private Set<String> getAllJsonKeyValues(String column, String key) { |
| 196 | + ensureIdentifierIsSafe(key); |
| 197 | + return getConnection() |
| 198 | + .map(conn -> { |
| 199 | + try (var statement = conn.prepareStatement("SELECT DISTINCT %s->>'%s' FROM main.aggregated_data".formatted(column, key))) { |
| 200 | + return getStatementResultAsStrings(statement, false); |
| 201 | + } catch (Exception e) { |
| 202 | + Log.error("Failed to get keys of column: " + column, e); |
| 203 | + } |
| 204 | + return new HashSet<String>(); |
| 205 | + }) |
| 206 | + .orElse(new HashSet<>()); |
| 207 | + } |
| 208 | + |
| 209 | + private Set<String> getStatementResultAsStrings(PreparedStatement statement, boolean removeBrackets) throws SQLException { |
| 210 | + var result = statement.executeQuery(); |
| 211 | + var keys = new HashSet<String>(); |
| 212 | + while (result.next()) { |
| 213 | + var keyValue = result.getString(1); |
| 214 | + if (keyValue != null) { |
| 215 | + keys.add(removeBrackets && keyValue.endsWith("]") && keyValue.startsWith("[") ? |
| 216 | + keyValue.substring(1, keyValue.length() - 1) : keyValue); |
| 217 | + } |
| 218 | + } |
| 219 | + return keys; |
| 220 | + } |
| 221 | + |
| 222 | + public Set<String> getAllTagValues(String tagKey) { |
| 223 | + return getAllJsonKeyValues("tags", tagKey); |
| 224 | + } |
| 225 | + |
| 226 | + public Set<String> getAllContextValues(String contextKey) { |
| 227 | + return getAllJsonKeyValues("context", contextKey); |
| 228 | + } |
| 229 | + |
| 230 | + public Path exportData(Instant startDate, Instant endDate, String format) { |
| 231 | + var finalFormat = (format == null ? "csv" : format).toLowerCase(); |
| 232 | + var finalStartDate = startDate == null ? Instant.now().minus(Duration.ofDays(30)) : startDate; |
| 233 | + var finalEndDate = endDate == null ? Instant.now() : endDate; |
| 234 | + |
| 235 | + Log.infof("Generating report for the period from %s to %s", finalStartDate, finalEndDate); |
| 236 | + |
| 237 | + var tmpFileName = Path.of(System.getProperty("java.io.tmpdir"), "olap_export_" + UUID.randomUUID() + "." + finalFormat); |
| 238 | + return getConnection().map((conn) -> { |
| 239 | + try (var statement = conn.prepareStatement("COPY (SELECT * FROM main.aggregated_data WHERE start_time >= ? AND end_time <= ?) TO '" + tmpFileName + "'" |
| 240 | + + (finalFormat.equals("csv") ? "(HEADER, DELIMITER ',')" : ""))) { |
| 241 | + statement.setObject(1, finalStartDate.atOffset(ZoneOffset.UTC)); |
| 242 | + statement.setObject(2, finalEndDate.atOffset(ZoneOffset.UTC)); |
| 243 | + statement.execute(); |
| 244 | + return tmpFileName; |
| 245 | + } catch (SQLException e) { |
| 246 | + Log.error("Failed to export data", e); |
| 247 | + return null; |
| 248 | + } |
| 249 | + }).orElse(null); |
| 250 | + } |
| 251 | +} |
0 commit comments