file drop support

- Add a folder where you can drop Zip files which will then be
  extracted on the fly and ingsted.
- CsvReaderSettings now contain TagMatcher that are applied to the
  first line and can be used to extract additional tags.
- Update to jdk 16 so that we can have records.

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

@@ -0,0 +1,61 @@
+package org.lucares.pdbui;
+
+import java.io.BufferedInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Path;
+import java.util.Enumeration;
+import java.util.Optional;
+import java.util.concurrent.ArrayBlockingQueue;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipFile;
+
+import org.lucares.pdb.datastore.Entries;
+import org.lucares.pdb.datastore.RuntimeTimeoutException;
+import org.lucares.performance.db.PerformanceDb;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class FileDropZipHandler implements FileDropFileTypeHandler {
+
+    private final PerformanceDb performanceDb;
+    private final FileDropConfigProvider configProvider;
+
+    @Autowired
+    public FileDropZipHandler(final PerformanceDb performanceDb, final FileDropConfigProvider configProvider) {
+        super();
+        this.performanceDb = performanceDb;
+        this.configProvider = configProvider;
+    }
+
+    @Override
+    public boolean isHandle(final Path file) {
+        return file.getFileName().toString().endsWith(".zip");
+    }
+
+    @Override
+    public void handle(final Path file) throws IOException, RuntimeTimeoutException, InterruptedException {
+        final ZipFile zipFile = new ZipFile(file.toFile());
+        final Enumeration<? extends ZipEntry> entries = zipFile.entries();
+
+        while (entries.hasMoreElements()) {
+            final ZipEntry entry = entries.nextElement();
+            // System.out.println(entry.getName() + " isDir: " + entry.isDirectory());
+
+            if (entry.isDirectory()) {
+                continue;
+            }
+
+            final Optional<CsvReaderSettings> csvSettings = configProvider.provideCsvReaderSettings(entry.getName());
+            if (csvSettings.isPresent()) {
+                final ArrayBlockingQueue<Entries> queue = performanceDb.getQueue();
+                final CsvToEntryTransformer csvToEntryTransformer = new CsvToEntryTransformer(queue, csvSettings.get());
+                try (final InputStream inputStream = new BufferedInputStream(zipFile.getInputStream(entry),
+                        1024 * 1024)) {
+                    csvToEntryTransformer.readCSV(inputStream);
+                }
+            }
+        }
+    }
+}