Future _compileDDC()

in lib/src/common_server_impl.dart [243:289]
41 lines of code
5 McCabe index (conditional complexity)

  Future<proto.CompileDDCResponse> _compileDDC(String source) async {
    try {
      final sourceHash = _hashSource(source);
      final memCacheKey = '%%COMPILE_DDC:v0:source:$sourceHash';

      final result = await _checkCache(memCacheKey);
      if (result != null) {
        log.info('CACHE: Cache hit for compileDDC');
        final resultObj = json.decode(result) as Map<String, dynamic>;
        return proto.CompileDDCResponse()
          ..result = resultObj['compiledJS'] as String
          ..modulesBaseUrl = resultObj['modulesBaseUrl'] as String;
      }

      log.info('CACHE: MISS for compileDDC');
      final watch = Stopwatch()..start();

      final results = await _compiler.compileDDC(source);

      if (results.hasOutput) {
        final lineCount = source.split('\n').length;
        final outputSize = (results.compiledJS?.length ?? 0 / 1024).ceil();
        final ms = watch.elapsedMilliseconds;
        log.info('PERF: Compiled $lineCount lines of Dart into '
            '${outputSize}kb of JavaScript in ${ms}ms using DDC.');

        final cachedResult = const JsonEncoder().convert(<String, String>{
          'compiledJS': results.compiledJS ?? '',
          'modulesBaseUrl': results.modulesBaseUrl ?? '',
        });
        // Don't block on cache set.
        unawaited(_setCache(memCacheKey, cachedResult));
        return proto.CompileDDCResponse()
          ..result = results.compiledJS ?? ''
          ..modulesBaseUrl = results.modulesBaseUrl ?? '';
      } else {
        final problems = results.problems;
        final errors = problems.map(_printCompileProblem).join('\n');
        throw BadRequest(errors);
      }
    } catch (e, st) {
      if (e is! BadRequest) {
        log.severe('Error during compile (DDC) on "$source"', e, st);
      }
      rethrow;
    }
  }