DescribeDatastore Java Example
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","DescribeDatastore");
CkStringBuilder sbResponseBody = new CkStringBuilder();
success = rest.FullRequestNoBodySb("GET","/datastores/{datastoreName}",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 AttributeName;
String timestampPartitionAttributeName;
String TimestampFormat;
String name;
String v_type;
String Arn = jResp.stringOf("datastore.arn");
int CreationTime = jResp.IntOf("datastore.creationTime");
int LastMessageArrivalTime = jResp.IntOf("datastore.lastMessageArrivalTime");
int LastUpdateTime = jResp.IntOf("datastore.lastUpdateTime");
String Name = jResp.stringOf("datastore.name");
int NumberOfDays = jResp.IntOf("datastore.retentionPeriod.numberOfDays");
int Unlimited = jResp.IntOf("datastore.retentionPeriod.unlimited");
String Status = jResp.stringOf("datastore.status");
String Bucket = jResp.stringOf("datastore.storage.customerManagedS3.bucket");
String KeyPrefix = jResp.stringOf("datastore.storage.customerManagedS3.keyPrefix");
String RoleArn = jResp.stringOf("datastore.storage.customerManagedS3.roleArn");
String CustomerManagedS3StorageBucket = jResp.stringOf("datastore.storage.iotSiteWiseMultiLayerStorage.customerManagedS3Storage.bucket");
String CustomerManagedS3StorageKeyPrefix = jResp.stringOf("datastore.storage.iotSiteWiseMultiLayerStorage.customerManagedS3Storage.keyPrefix");
int EstimatedOn = jResp.IntOf("statistics.size.estimatedOn");
int EstimatedSizeInBytes = jResp.IntOf("statistics.size.estimatedSizeInBytes");
int i = 0;
int count_i = jResp.SizeOfArray("datastore.datastorePartitions.partitions");
while (i < count_i) {
jResp.put_I(i);
AttributeName = jResp.stringOf("datastore.datastorePartitions.partitions[i].attributePartition.attributeName");
timestampPartitionAttributeName = jResp.stringOf("datastore.datastorePartitions.partitions[i].timestampPartition.attributeName");
TimestampFormat = jResp.stringOf("datastore.datastorePartitions.partitions[i].timestampPartition.timestampFormat");
i = i+1;
}
i = 0;
count_i = jResp.SizeOfArray("datastore.fileFormatConfiguration.parquetConfiguration.schemaDefinition.columns");
while (i < count_i) {
jResp.put_I(i);
name = jResp.stringOf("datastore.fileFormatConfiguration.parquetConfiguration.schemaDefinition.columns[i].name");
v_type = jResp.stringOf("datastore.fileFormatConfiguration.parquetConfiguration.schemaDefinition.columns[i].type");
i = i+1;
}
// A sample JSON response body parsed by the above code:
// {
// "datastore": {
// "arn": "string",
// "creationTime": number,
// "datastorePartitions": {
// "partitions": [
// {
// "attributePartition": {
// "attributeName": "string"
// },
// "timestampPartition": {
// "attributeName": "string",
// "timestampFormat": "string"
// }
// }
// ]
// },
// "fileFormatConfiguration": {
// "jsonConfiguration": {},
// "parquetConfiguration": {
// "schemaDefinition": {
// "columns": [
// {
// "name": "string",
// "type": "string"
// }
// ]
// }
// }
// },
// "lastMessageArrivalTime": number,
// "lastUpdateTime": number,
// "name": "string",
// "retentionPeriod": {
// "numberOfDays": number,
// "unlimited": boolean
// },
// "status": "string",
// "storage": {
// "customerManagedS3": {
// "bucket": "string",
// "keyPrefix": "string",
// "roleArn": "string"
// },
// "iotSiteWiseMultiLayerStorage": {
// "customerManagedS3Storage": {
// "bucket": "string",
// "keyPrefix": "string"
// }
// },
// "serviceManagedS3": {}
// }
// },
// "statistics": {
// "size": {
// "estimatedOn": number,
// "estimatedSizeInBytes": number
// }
// }
// }
}
}
