Method resolveMetric

src/meta/TSUIDQuery.java:680–720

Resolves the metric and tags (if set) to their UIDs, setting the local arrays. @return A deferred to wait on or catch exceptions in @throws IllegalArgumentException if the metric is empty || null or the tag list is null.

()

   * tag list is null.
   */
  private Deferred<Object> resolveMetric() {
    if (metric == null || metric.isEmpty()) {
      throw new IllegalArgumentException("The metric cannot be empty");
    }
    if (tags == null) {
      throw new IllegalArgumentException("Tags cannot be null or empty "
          + "when getting a TSUID");
    }
    
    class TagsCB implements Callback<Object, ArrayList<byte[]>> {
      @Override
      public Object call(final ArrayList<byte[]> tag_list) throws Exception {
        setTagUIDs(tag_list);
        return null;
      }
      @Override
      public String toString() {
        return "Tag resolution callback";
      }
    }
    
    class MetricCB implements Callback<Deferred<Object>, byte[]> {
      @Override
      public Deferred<Object> call(final byte[] uid) 
          throws Exception {
        setMetricUID(uid);
        if (tags.isEmpty()) {
          setTagUIDs(new ArrayList<byte[]>(0));
          return null;
        }
        return Tags.resolveAllAsync(tsdb, tags).addCallback(new TagsCB());
      }
      @Override
      public String toString() {
        return "Metric resolution callback";
      }
    }
    
    return tsdb.getUIDAsync(UniqueIdType.METRIC, metric)
        .addCallbackDeferring(new MetricCB());
  }
  
  /** @param tsuid The TSUID to store */
  private void setTSUID(final byte[] tsuid) {