Examples with ExistingField org.apache.flink.table.sources.tsextractors.ExistingField used on opensource projects

Example 1 with ExistingField

use of org.apache.flink.table.sources.tsextractors.ExistingField in project flink by apache.

the class RowtimeValidator method getRowtimeComponents.

// utilities
public static Optional<Tuple2<TimestampExtractor, WatermarkStrategy>> getRowtimeComponents(DescriptorProperties properties, String prefix) {
    // create timestamp extractor
    TimestampExtractor extractor;
    Optional<String> t = properties.getOptionalString(prefix + ROWTIME_TIMESTAMPS_TYPE);
    if (!t.isPresent()) {
        return Optional.empty();
    }
    switch(t.get()) {
        case ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_FIELD:
            String field = properties.getString(prefix + ROWTIME_TIMESTAMPS_FROM);
            extractor = new ExistingField(field);
            break;
        case ROWTIME_TIMESTAMPS_TYPE_VALUE_FROM_SOURCE:
            extractor = StreamRecordTimestamp.INSTANCE;
            break;
        case ROWTIME_TIMESTAMPS_TYPE_VALUE_CUSTOM:
            Class<TimestampExtractor> clazz = properties.getClass(prefix + ROWTIME_TIMESTAMPS_CLASS, TimestampExtractor.class);
            extractor = EncodingUtils.decodeStringToObject(properties.getString(prefix + ROWTIME_TIMESTAMPS_SERIALIZED), clazz);
            break;
        default:
            throw new ValidationException("Unsupported rowtime timestamps type: " + t.get());
    }
    // create watermark strategy
    WatermarkStrategy strategy;
    String s = properties.getString(prefix + ROWTIME_WATERMARKS_TYPE);
    switch(s) {
        case ROWTIME_WATERMARKS_TYPE_VALUE_PERIODIC_ASCENDING:
            strategy = new AscendingTimestamps();
            break;
        case ROWTIME_WATERMARKS_TYPE_VALUE_PERIODIC_BOUNDED:
            long delay = properties.getLong(prefix + ROWTIME_WATERMARKS_DELAY);
            strategy = new BoundedOutOfOrderTimestamps(delay);
            break;
        case ROWTIME_WATERMARKS_TYPE_VALUE_FROM_SOURCE:
            strategy = PreserveWatermarks.INSTANCE;
            break;
        case ROWTIME_WATERMARKS_TYPE_VALUE_CUSTOM:
            Class<WatermarkStrategy> clazz = properties.getClass(prefix + ROWTIME_WATERMARKS_CLASS, WatermarkStrategy.class);
            strategy = EncodingUtils.decodeStringToObject(properties.getString(prefix + ROWTIME_WATERMARKS_SERIALIZED), clazz);
            break;
        default:
            throw new RuntimeException("Unsupported rowtime timestamps type: " + s);
    }
    return Optional.of(new Tuple2<>(extractor, strategy));
}