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    • io.zeebe.redis.exporter.XInfoGroup Maven / Gradle / Ivy

    package io.zeebe.redis.exporter;

import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Optional;

public class XInfoGroup {

  private static final Charset charset;

  private String name;
  private long lastDeliveredId;

  private long pending = 0;

  private List consumers = new ArrayList<>();

  static {
    charset = Charset.forName("UTF-8");
  }

  public static XInfoGroup fromXInfo(Object xinfoGroup, boolean useProtoBuf) {
    ArrayList info = (ArrayList) xinfoGroup;
    String name = null;
    String lastDeliveredId = null;
    String pending = null;
    for (int i = 0; i < info.size(); i++) {
      String current = getValueAt(info, i, useProtoBuf);
      if ("name".equals(current)) {
        name = getValueAt(info, i + 1, useProtoBuf);
      } else if ("last-delivered-id".equals(current)) {
        lastDeliveredId = getValueAt(info, i + 1, useProtoBuf);
      } else if ("pending".equals(current)) {
        pending = getValueAt(info, i + 1, useProtoBuf);
      }
      if (name != null && lastDeliveredId != null) break;
    }
    return new XInfoGroup(name, lastDeliveredId, pending);
  }

  private static String getValueAt(ArrayList list, int i, boolean useProtoBuf) {
    Object obj = list.get(i);
    if (useProtoBuf && obj instanceof byte[]) return new String((byte[]) obj, charset);
    return String.valueOf(obj);
  }

  public XInfoGroup(String name, String lastDeliveredId, String pending) {
    this.name = name;
    this.lastDeliveredId = getMessageIdAsLong(lastDeliveredId);
    this.pending = pending != null ? Long.parseLong(pending) : 0;
  }

  public String getName() {
    return name;
  }

  public void considerPendingMessageId(String pendingMessageId) {
    if (pendingMessageId == null) return;
    long pendingMessageIdLongVal = getMessageIdAsLong(pendingMessageId);
    if (pendingMessageIdLongVal < lastDeliveredId || lastDeliveredId == 0) {
      lastDeliveredId = pendingMessageIdLongVal;
    }
  }

  public long getLastDeliveredId() {
    return lastDeliveredId;
  }

  public long getPending() {
    return pending;
  }

  public void setConsumers(List consumers) {
    if (consumers == null) return;
    this.consumers = consumers;
  }

  public List getConsumers() {
    return consumers;
  }

  public Optional getYoungestConsumer() {
    if (consumers.isEmpty()) return Optional.empty();
    return Optional.of(consumers.get(0));
  }

  private long getMessageIdAsLong(String messageId) {
    if (messageId == null) return 0;
    int idx = messageId.lastIndexOf('-');
    if (idx < 0) return Long.parseLong(messageId);
    return Long.parseLong(messageId.substring(0, idx));
  }

  @Override
  public String toString() {
    return "XInfoGroup{"
        + "name='"
        + name
        + '\''
        + ", lastDeliveredId='"
        + lastDeliveredId
        + '\''
        + ", pending="
        + pending
        + '}';
  }
}
    
    
    
    

    




    
    
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