public void eval()

in flink-doris-connector/src/main/java/org/apache/doris/flink/table/DorisRowDataAsyncLookupFunction.java [100:143]
43 lines of code
10 McCabe index (conditional complexity)

    public void eval(CompletableFuture<Collection<RowData>> future, Object... keys)
            throws IOException {
        RowData keyRow = GenericRowData.of(keys);
        if (cache != null) {
            List<RowData> cachedRows = cache.getIfPresent(keyRow);
            if (cachedRows != null) {
                lookupMetrics.incHitCount();
                if (LOG.isDebugEnabled()) {
                    LOG.debug("lookup cache hit for key: {}", keyRow);
                }
                future.complete(cachedRows);
                return;
            } else {
                lookupMetrics.incMissCount();
            }
        }

        CompletableFuture<List<RowData>> resultFuture = lookupReader.asyncGet(keyRow);
        resultFuture.handleAsync(
                (resultRows, throwable) -> {
                    try {
                        if (throwable != null) {
                            future.completeExceptionally(throwable);
                        } else {
                            if (resultRows == null || resultRows.isEmpty()) {
                                if (cache != null) {
                                    cache.put(keyRow, Collections.emptyList());
                                    lookupMetrics.incLoadCount();
                                }
                                future.complete(Collections.emptyList());
                            } else {
                                if (cache != null) {
                                    cache.put(keyRow, resultRows);
                                    lookupMetrics.incLoadCount();
                                }
                                future.complete(resultRows);
                            }
                        }
                    } catch (Throwable t) {
                        future.completeExceptionally(t);
                    }
                    return null;
                });
    }