与 AWS SDK ExecuteQuery 配合使用 - AWS SDK 代码示例

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与 AWS SDK ExecuteQuery 配合使用

以下代码示例演示了如何使用 ExecuteQuery。

Java
适用于 Java 的 SDK 2.x
注意

还有更多相关信息 GitHub。在 AWS 代码示例存储库中查找完整示例，了解如何进行设置和运行。

    /**
     * Executes a Gremlin profile query on the Neptune Analytics graph.
     *
     * @param client       the {@link NeptuneGraphClient} instance to use for the query
     * @param graphId      the identifier of the graph to execute the query on
     *
     * @throws NeptuneGraphException if an error occurs while executing the query on the Neptune Graph
     * @throws Exception if an unexpected error occurs
     */
    public static void executeGremlinProfileQuery(NeptuneGraphClient client, String graphId) {

        try {
            System.out.println("Running openCypher query on Neptune Analytics...");

            ExecuteQueryRequest request = ExecuteQueryRequest.builder()
                    .graphIdentifier(graphId)
                    .queryString("MATCH (n {code: 'ANC'}) RETURN n")
                    .language("OPEN_CYPHER")
                    .build();

            ResponseInputStream<ExecuteQueryResponse> response = client.executeQuery(request);
            try (BufferedReader reader = new BufferedReader(new InputStreamReader(response, StandardCharsets.UTF_8))) {
                String result = reader.lines().collect(Collectors.joining("\n"));
                System.out.println("Query Result:");
                System.out.println(result);
            } catch (Exception e) {
                System.err.println("Error reading response: " + e.getMessage());
            }

        } catch (NeptuneGraphException e) {
            System.err.println("NeptuneGraph error: " + e.awsErrorDetails().errorMessage());
        } catch (Exception e) {
            System.err.println("Unexpected error: " + e.getMessage());
        } finally {
            client.close();
        }
    }

  • 有关 API 的详细信息，请参阅 AWS SDK for Java 2.x API 参考ExecuteQuery中的。