nstream.adapter.nats.NatsConsumerConfLoader Maven / Gradle / Ivy

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Templates for consuming from and producing to NATS with Swim
There is a newer version: 4.15.23
//package nstream.adapter.nats;
//
//import io.nats.client.api.AckPolicy;
//import io.nats.client.api.ConsumerConfiguration;
//import io.nats.client.api.DeliverPolicy;
//import io.nats.client.api.ReplayPolicy;
//import java.time.Duration;
//import java.time.ZonedDateTime;
//import java.util.HashMap;
//import java.util.Map;
//import java.util.Properties;
//import java.util.Set;
//import java.util.SortedMap;
//import java.util.regex.Pattern;
//import static swim.util.Severity.warning;
//
//public final class NatsConsumerConfLoader {
//
//  // TODO: Check and keep only Pull based options
//  private static final Map> KNOWN_FIELDS = Map.ofEntries(
//      Map.entry("deliverPolicy", DeliverPolicy.class),
//      Map.entry("startSequence", Long.TYPE),
//      Map.entry("startTime", ZonedDateTime.class),
//      Map.entry("ackPolicy", AckPolicy.class),
//      Map.entry("ackWait", Long.TYPE),
//      Map.entry("maxAckPending", Long.TYPE),
//      Map.entry("replayPolicy", ReplayPolicy.class),
//      Map.entry("maxDeliver", Long.TYPE),
//      Map.entry("filterSubject", String.class),
//      Map.entry("rateLimit", Long.TYPE),
//      Map.entry("sampleFrequency", String.class),
//      Map.entry("idleHeartbeat", Long.TYPE),
//      Map.entry("flowControl", Long.TYPE)
//  );
//
//  private NatsConsumerConfLoader() {
//  }
//
//  private static void updateMap(String name, String value, Map result) {
//    if ("true".equalsIgnoreCase(value) || "false".equalsIgnoreCase(value)) {
//      result.put(name, Boolean.parseBoolean(value));
//      warning("[WARN] NatsConsumerConfLoader treated unknown property " + name + " as boolean");
//    } else {
//      try {
//        result.put(name, Long.parseLong(value));
//        warning("[WARN] NatsConsumerConfLoader treated unknown property " + name + " as long");
//      } catch (Exception e1) {
//        result.put(name, value);
//        warning("[WARN] NatsConsumerConfLoader treated unknown property " + name + " as String");
//      }
//    }
//  }
//
//  public static ConsumerConfiguration toLoadableConf(Properties properties) {
//
//    final ConsumerConfiguration.Builder ccBuilder = ConsumerConfiguration.builder();
//
//    final Map result = new HashMap<>(properties.size());
//    properties.forEach((k, v) -> {
//      final String name = k.toString();
//      final String value = v.toString();
//      if (KNOWN_FIELDS.containsKey(name)) {
//        updateMap(name, value, KNOWN_FIELDS.get(name), result);
//      } else {
//        updateMap(name, value, result);
//      }
//    });
//
//    // Dynamically apply configuration values
//    result.forEach((key, value) -> {
//      switch (key) {
//        case "deliverPolicy":
//          ccBuilder.deliverPolicy((DeliverPolicy) value);
//          break;
//        case "ackPolicy":
//          ccBuilder.ackPolicy((AckPolicy) value);
//          break;
//        case "replayPolicy":
//          ccBuilder.replayPolicy((ReplayPolicy) value);
//          break;
//        case "startSequence":
//          ccBuilder.startSequence((Long) value);
//          break;
//        case "startTime":
//          ccBuilder.startTime(((ZonedDateTime) value));
//          break;
//        case "ackWait":
//          ccBuilder.ackWait(Duration.ofMillis((Long) value));
//          break;
//        case "idleHeartbeat":
//          ccBuilder.idleHeartbeat(Duration.ofMillis((Long) value));
//          break;
//        case "maxAckPending":
//          ccBuilder.maxAckPending(((Long) value).intValue()); // Note the conversion to int
//          break;
//        case "maxDeliver":
//          ccBuilder.maxDeliver(((Long) value).intValue());
//          break;
//        case "filterSubject":
//          ccBuilder.filterSubject((String) value);
//          break;
//        case "rateLimit":
//          ccBuilder.rateLimit((Long) value);
//          break;
//        case "sampleFrequency":
//          ccBuilder.sampleFrequency((String) value);
//          break;
//        case "flowControl":
//          ccBuilder.flowControl(Duration.ofMillis((Long) value));
//          break;
//      }
//    });
//
//    return ccBuilder.build();
//  }
//
//  private static void updateMap(String name, String value, Class knownClass,
//                                Map result) {
//    if (knownClass == String.class) {
//      result.put(name, value);
//    } else if (knownClass == Integer.TYPE) {
//      result.put(name, Integer.parseInt(value));
//    } else if (knownClass == Long.TYPE) {
//      result.put(name, Long.parseLong(value));
//    } else if (knownClass == Boolean.TYPE) {
//      result.put(name, Boolean.parseBoolean(value));
//    } else if (knownClass == Set.class) {
//      if (value != null && !value.isEmpty()) {
//        result.put(name, Set.of(value.split(",")));
//      }
//    } else if (knownClass == Pattern.class) {
//      result.put(name, Pattern.compile(value));
//    } else if (knownClass == SortedMap.class) {
//      throw new UnsupportedOperationException("not yet implemented");
//    } else { // FIXME
//      throw new UnsupportedOperationException("not yet implemented");
//    }
//  }
//}