reduce memory usage

Reduce memory usage by storing the filename as string instead of
individual tags.

pdb-ui/src/main/java/org/lucares/pdbui/TcpIngestor.java

@@ -42,7 +42,6 @@ import com.fasterxml.jackson.databind.ObjectReader;
 @Component
 public class TcpIngestor implements Ingestor, AutoCloseable, DisposableBean {
 	private static final Logger LOGGER = LoggerFactory.getLogger(TcpIngestor.class);
-	private static final Logger METRICS_LOGGER = LoggerFactory.getLogger("org.lucares.metrics.tcpIngestor");
 
 	public static final int PORT = 17347;
 
@@ -73,8 +72,7 @@ public class TcpIngestor implements Ingestor, AutoCloseable, DisposableBean {
 			Thread.currentThread().setName("worker-" + clientAddress);
 			LOGGER.debug("opening streams to client");
 			try (PrintWriter out = new PrintWriter(clientSocket.getOutputStream(), true);
-					BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));
-			) {
+					BufferedReader in = new BufferedReader(new InputStreamReader(clientSocket.getInputStream()));) {
 				final ObjectMapper objectMapper = new ObjectMapper();
 				final ObjectReader objectReader = objectMapper.readerFor(typeReferenceForMap);
 
@@ -91,12 +89,12 @@ public class TcpIngestor implements Ingestor, AutoCloseable, DisposableBean {
 							LOGGER.debug("adding entry to queue: {}", entry);
 							queue.put(entry.get());
 						}
-					} catch (JsonParseException e) {
+					} catch (final JsonParseException e) {
 						LOGGER.info("json parse error in line '" + line + "'", e);
 					}
 				}
 				LOGGER.debug("connection closed: " + clientAddress);
-			} catch (Throwable e) {
+			} catch (final Throwable e) {
 				LOGGER.warn("Stream handling failed", e);
 				throw e;
 			}

pdb-ui/src/test/java/org/lucares/performance/db/ingestor/TcpIngestorTest.java

@@ -7,6 +7,7 @@ import java.time.Instant;
 import java.time.OffsetDateTime;
 import java.time.ZoneOffset;
 import java.time.format.DateTimeFormatter;
+import java.time.temporal.ChronoUnit;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -75,10 +76,12 @@ public class TcpIngestorTest {
 			Assert.assertEquals(result.size(), 2);
 
 			Assert.assertEquals(result.get(0).getValue(), 1);
-			Assert.assertEquals(result.get(0).getDate().toInstant(), dateA.toInstant());
+			Assert.assertEquals(result.get(0).getDate().toInstant().truncatedTo(ChronoUnit.MILLIS),
+					dateA.toInstant().truncatedTo(ChronoUnit.MILLIS));
 
 			Assert.assertEquals(result.get(1).getValue(), 2);
-			Assert.assertEquals(result.get(1).getDate().toInstant(), dateB.toInstant());
+			Assert.assertEquals(result.get(1).getDate().toInstant().truncatedTo(ChronoUnit.MILLIS),
+					dateB.toInstant().truncatedTo(ChronoUnit.MILLIS));
 		}
 	}
 
@@ -99,8 +102,8 @@ public class TcpIngestorTest {
 			entryA.put("tags", Collections.emptyList());
 
 			// skipped, because it is not valid json
-			String corrupEntry = "{\"corrupt...";
-			
+			final String corrupEntry = "{\"corrupt...";
+
 			// valid entry
 			final Map<String, Object> entryB = new HashMap<>();
 			entryB.put("duration", 2);
@@ -109,9 +112,9 @@ public class TcpIngestorTest {
 			entryB.put("tags", Collections.emptyList());
 
 			final ObjectMapper objectMapper = new ObjectMapper();
-			final String data = objectMapper.writeValueAsString(entryA)+"\n"+corrupEntry+"\n"+objectMapper.writeValueAsString(entryB)+"\n";
-			
-			
+			final String data = objectMapper.writeValueAsString(entryA) + "\n" + corrupEntry + "\n"
+					+ objectMapper.writeValueAsString(entryB) + "\n";
+
 			PdbTestUtil.send(data);
 		}
 
@@ -120,7 +123,8 @@ public class TcpIngestorTest {
 			Assert.assertEquals(result.size(), 1);
 
 			Assert.assertEquals(result.get(0).getValue(), 2);
-			Assert.assertEquals(result.get(0).getDate().toInstant(), dateB.toInstant());
+			Assert.assertEquals(result.get(0).getDate().toInstant().truncatedTo(ChronoUnit.MILLIS),
+					dateB.toInstant().truncatedTo(ChronoUnit.MILLIS));
 		}
 	}
 }