c#如何与flink集群交互

要在C#中与Flink集群进行交互，您需要使用Flink的REST API。以下是一个简单的示例，展示了如何使用C#与Flink集群进行交互：

1. 首先，确保您已经安装了Flink集群并运行正常。您可以按照Flink官方文档中的说明进行安装和配置：https://ci.apache.org/projects/flink/flink-docs-release-1.13/docs/try-flink/local_installation/

2. 在C#项目中，安装System.Net.Http库，用于发送HTTP请求。

3. 创建一个C#类，用于与Flink集群进行交互。以下是一个简单的示例：

using System; using System.Net.Http; using System.Threading.Tasks;  namespace FlinkInteraction {     public class FlinkClient     {         private readonly HttpClient _httpClient;         private readonly string _flinkJobManagerUrl;          public FlinkClient(string flinkJobManagerUrl)         {             _httpClient = new HttpClient();             _flinkJobManagerUrl = flinkJobManagerUrl;         }          public async Task<string> SubmitJobAsync(string jarId, string entryClass, string parallelism)         {             var submitJobUrl = $"{_flinkJobManagerUrl}/jars/{jarId}/run";             var content = new FormUrlEncodedContent(new[]             {                 new KeyValuePair<string, string>("entry-class", entryClass),                 new KeyValuePair<string, string>("parallelism", parallelism)             });              var response = await _httpClient.PostAsync(submitJobUrl, content);             if (response.IsSuccessStatusCode)             {                 var result = await response.Content.ReadAsStringAsync();                 return result;             }             else             {                 throw new Exception($"Failed to submit job: {response.StatusCode}");             }         }          public async Task<string> GetJobStatusAsync(string jobId)         {             var jobStatusUrl = $"{_flinkJobManagerUrl}/jobs/{jobId}";             var response = await _httpClient.GetAsync(jobStatusUrl);             if (response.IsSuccessStatusCode)             {                 var result = await response.Content.ReadAsStringAsync();                 return result;             }             else             {                 throw new Exception($"Failed to get job status: {response.StatusCode}");             }         }     } } 

4. 使用FlinkClient类与Flink集群进行交互。以下是一个简单的示例：

using System; using System.Threading.Tasks;  namespace FlinkInteraction {     class Program     {         static async Task Main(string[] args)         {             // Replace with your Flink JobManager URL             var flinkJobManagerUrl = "http://localhost:8081";             var flinkClient = new FlinkClient(flinkJobManagerUrl);              // Replace with your JAR file ID, entry class, and parallelism             var jarId = "your-jar-id";             var entryClass = "your.entry.class";             var parallelism = "1";              try             {                 // Submit the job                 var jobResponse = await flinkClient.SubmitJobAsync(jarId, entryClass, parallelism);                 Console.WriteLine($"Job submitted successfully: {jobResponse}");                  // Get the job ID from the response                 var jobId = jobResponse.Split('"')[3];                  // Get the job status                 var jobStatusResponse = await flinkClient.GetJobStatusAsync(jobId);                 Console.WriteLine($"Job status: {jobStatusResponse}");             }             catch (Exception ex)             {                 Console.WriteLine($"Error: {ex.Message}");             }         }     } } 

这个示例展示了如何使用C#与Flink集群进行交互。您可以根据自己的需求修改代码，以满足不同的场景。