Java 类com.mongodb.Tag 实例源码

private static TagSet parseArg(ObjectNode arg) {
    List<Tag> tags = new ArrayList<>();
    for (Iterator<Map.Entry<String, JsonNode>> itr = arg.fields(); itr.hasNext();) {
        Map.Entry<String, JsonNode> entry = itr.next();
        tags.add(new Tag(entry.getKey(), entry.getValue().asText()));
    }
    return new TagSet(tags);
}

ReadPreferenceParser(ConnectionString connectionString, JsonObject config) {
  ReadPreference connStringReadPreference = connectionString != null ? connectionString.getReadPreference() : null;
  if (connStringReadPreference != null) {
    // Prefer connection string's read preference
    readPreference = connStringReadPreference;
  } else {
    ReadPreference rp;
    String rps = config.getString("readPreference");
    if (rps != null) {
      JsonArray readPreferenceTags = config.getJsonArray("readPreferenceTags");
      if (readPreferenceTags == null) {
        rp = ReadPreference.valueOf(rps);
        if (rp == null) throw new IllegalArgumentException("Invalid ReadPreference " + rps);
      } else {
        // Support advanced ReadPreference Tags
        List<TagSet> tagSet = new ArrayList<>();
        readPreferenceTags.forEach(o -> {
          String tagString = (String) o;
          List<Tag> tags = Stream.of(tagString.trim().split(","))
              .map(s -> s.split(":"))
              .filter(array -> {
                if (array.length != 2) {
                  throw new IllegalArgumentException("Invalid readPreferenceTags value '" + tagString + "'");
                }
                return true;
              }).map(array -> new Tag(array[0], array[1])).collect(Collectors.toList());

          tagSet.add(new TagSet(tags));
        });
        rp = ReadPreference.valueOf(rps, tagSet);
      }
    } else {
      rp = null;
    }

    readPreference = rp;
  }
}

private static TagSet toTags( DBObject tagsDocument )
{
    List<Tag> tagList = new ArrayList<Tag>( );
    for ( String key : tagsDocument.keySet( ) )
    {
        tagList.add( new Tag( key, tagsDocument.get( key ).toString( ) ) );
    }
    return new TagSet( tagList );
}

@Test
public void testNearestArgs() {
    TaggableReadPreference pref = (TaggableReadPreference) MongoReadPreference.parse("nearest ( {\"x\":1} )");
    Assert.assertTrue(pref.equals(ReadPreference.nearest(new TagSet(Arrays.asList(new Tag("x", "1"))))));
}

@Test
public void testNearestArgs2() {
    TaggableReadPreference pref = (TaggableReadPreference) MongoReadPreference.parse("nearest ( [ {\"x\":1}, {\"y\":\"a\"}] )");
    Assert.assertTrue(pref.equals(ReadPreference.nearest(Arrays.asList(new TagSet(Arrays.asList(new Tag("x", "1"))),
            new TagSet(Arrays.asList(new Tag("y", "a")))))));
}

@Test
public void testNearestArgs3() {
    TaggableReadPreference pref = (TaggableReadPreference) MongoReadPreference.parse("nearest([ {\"x\":1}, {\"y\":\"a\"}])");
    Assert.assertTrue(pref.equals(ReadPreference.nearest(Arrays.asList(new TagSet(Arrays.asList(new Tag("x", "1"))),
            new TagSet(Arrays.asList(new Tag("y", "a")))))));
}