Chilkat Online Tools

ListChannels Java Example

AWS IoT Analytics

import com.chilkatsoft.*;

public class ChilkatExample {

  static {
    try {
        System.loadLibrary("chilkat");
    } catch (UnsatisfiedLinkError e) {
      System.err.println("Native code library failed to load.\n" + e);
      System.exit(1);
    }
  }

  public static void main(String argv[])
  {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkRest rest = new CkRest();
    boolean success;

    CkAuthAws authAws = new CkAuthAws();
    authAws.put_AccessKey("AWS_ACCESS_KEY");
    authAws.put_SecretKey("AWS_SECRET_KEY");

    // Don't forget to change the region to your particular region. (Also make the same change in the call to Connect below.)
    authAws.put_Region("us-west-2");
    authAws.put_ServiceName("iotanalytics");
    // SetAuthAws causes Chilkat to automatically add the following headers: Authorization, X-Amz-Date
    rest.SetAuthAws(authAws);

    // URL: https://iotanalytics.us-west-2.amazonaws.com/
    // Use the same region as specified above.
    success = rest.Connect("iotanalytics.us-west-2.amazonaws.com",443,true,true);
    if (success != true) {
        System.out.println("ConnectFailReason: " + rest.get_ConnectFailReason());
        System.out.println(rest.lastErrorText());
        return;
        }

    rest.AddHeader("Content-Type","application/x-amz-json-1.1");
    rest.AddHeader("X-Amz-Target","ListChannels");

    CkStringBuilder sbResponseBody = new CkStringBuilder();
    success = rest.FullRequestNoBodySb("GET","/channels",sbResponseBody);
    if (success != true) {
        System.out.println(rest.lastErrorText());
        return;
        }

    int respStatusCode = rest.get_ResponseStatusCode();
    System.out.println("response status code = " + respStatusCode);
    if (respStatusCode != 200) {
        System.out.println("Response Header:");
        System.out.println(rest.responseHeader());
        System.out.println("Response Body:");
        System.out.println(sbResponseBody.getAsString());
        return;
        }

    CkJsonObject jResp = new CkJsonObject();
    jResp.LoadSb(sbResponseBody);

    // The following code parses the JSON response.
    // A sample JSON response is shown below the sample code.

    // Use this online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    String channelName;
    String Bucket;
    String KeyPrefix;
    String RoleArn;
    int creationTime;
    int lastMessageArrivalTime;
    int lastUpdateTime;
    String status;

    String nextToken = jResp.stringOf("nextToken");
    int i = 0;
    int count_i = jResp.SizeOfArray("channelSummaries");
    while (i < count_i) {
        jResp.put_I(i);
        channelName = jResp.stringOf("channelSummaries[i].channelName");
        Bucket = jResp.stringOf("channelSummaries[i].channelStorage.customerManagedS3.bucket");
        KeyPrefix = jResp.stringOf("channelSummaries[i].channelStorage.customerManagedS3.keyPrefix");
        RoleArn = jResp.stringOf("channelSummaries[i].channelStorage.customerManagedS3.roleArn");
        creationTime = jResp.IntOf("channelSummaries[i].creationTime");
        lastMessageArrivalTime = jResp.IntOf("channelSummaries[i].lastMessageArrivalTime");
        lastUpdateTime = jResp.IntOf("channelSummaries[i].lastUpdateTime");
        status = jResp.stringOf("channelSummaries[i].status");
        i = i+1;
        }

    // A sample JSON response body parsed by the above code:

    // {
    //   "channelSummaries": [
    //     {
    //       "channelName": "string",
    //       "channelStorage": {
    //         "customerManagedS3": {
    //           "bucket": "string",
    //           "keyPrefix": "string",
    //           "roleArn": "string"
    //         },
    //         "serviceManagedS3": {}
    //       },
    //       "creationTime": number,
    //       "lastMessageArrivalTime": number,
    //       "lastUpdateTime": number,
    //       "status": "string"
    //     }
    //   ],
    //   "nextToken": "string"
    // }
  }
}