(Objective-C) Azure Service Bus - Send Batch of Messages to Topic or Queue

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Shows how to send a batch of messages to a service bus queue or topic.

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#import <CkoRest.h>
#import <CkoStringBuilder.h>
#import <NSString.h>
#import <CkoJsonObject.h>
#import <CkoJsonArray.h>

// Note: Requires Chilkat v9.5.0.65 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Make the initial connection.
// A single REST object, once connected, can be used for many Azure Service Bus REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
CkoRest *rest = [[CkoRest alloc] init];
BOOL bAutoReconnect = YES;
BOOL success = [rest Connect: @"<yournamespace>.servicebus.windows.net" port: [NSNumber numberWithInt: 443] tls: YES autoReconnect: bAutoReconnect];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Let's load a previously computed SAS token and use it.
// See Azure Shared Access Signature for an example to genenerate an Azure SAS token.
CkoStringBuilder *sbToken = [[CkoStringBuilder alloc] init];
[sbToken LoadFile: @"qa_data/tokens/serviceBusSas.txt" charset: @"utf-8"];

// Tell the REST object to use the Azure Shared Access Signature for authorization.
[sbToken Prepend: @"SharedAccessSignature "];
[rest AddHeader: @"Authorization" value: [sbToken GetAsString]];

// ----------------------------------------------------------------------------------------------

// Send to a topic (or queue) named "gilaMonster";
NSString *topicOrQueueName = @"gilaMonster";

// The HTTP request body contains JSON that contains multiple messages.
CkoJsonObject *json = [[CkoJsonObject alloc] init];
json.I = [NSNumber numberWithInt:0];
[json UpdateString: @"messages[i].Body" value: @"This is the first message"];
[json UpdateString: @"messages[i].BrokerProperties.Label" value: @"M1"];
[json UpdateString: @"messages[i].BrokerProperties.TimeToLiveTimeSpan" value: @"0.00:00:40"];

json.I = [NSNumber numberWithInt:1];
[json UpdateString: @"messages[i].Body" value: @"This is the second message"];
[json UpdateString: @"messages[i].BrokerProperties.Label" value: @"M2"];
[json UpdateString: @"messages[i].UserProperties.Priority" value: @"Low"];

json.I = [NSNumber numberWithInt:2];
[json UpdateString: @"messages[i].Body" value: @"This is the third message"];
[json UpdateString: @"messages[i].BrokerProperties.Label" value: @"M3"];
[json UpdateString: @"messages[i].UserProperties.Priority" value: @"Medium"];
[json UpdateString: @"messages[i].UserProperties.Customer" value: @"ABC"];

CkoJsonArray *jsonA = [json ArrayOf: @"messages"];
jsonA.EmitCompact = NO;
NSLog(@"%@",[jsonA Emit]);

// The following JSON array is produced by the above code:

// 	[
// 	  {
// 	    "Body": "This is the first message",
// 	    "BrokerProperties": {
// 	      "Label": "M1",
// 	      "TimeToLiveTimeSpan": "0.00:00:40"
// 	    }
// 	  },
// 	  {
// 	    "Body": "This is the second message",
// 	    "BrokerProperties": {
// 	      "Label": "M2"
// 	    },
// 	    "UserProperties": {
// 	      "Priority": "Low"
// 	    }
// 	  },
// 	  {
// 	    "Body": "This is the third message",
// 	    "BrokerProperties": {
// 	      "Label": "M3"
// 	    },
// 	    "UserProperties": {
// 	      "Priority": "Medium",
// 	      "Customer": "ABC"
// 	    }
// 	  }
// 	]

CkoStringBuilder *sbRequestBody = [[CkoStringBuilder alloc] init];
jsonA.EmitCompact = YES;
[jsonA EmitSb: sbRequestBody];

// Build the path..
CkoStringBuilder *sbPath = [[CkoStringBuilder alloc] init];
[sbPath Append: @"/"];
[sbPath Append: topicOrQueueName];
[sbPath Append: @"/messages"];

// Add timeout and api-version query parameters.
[rest AddQueryParam: @"timeout" value: @"20"];

// The Content-Type should be "application/vnd.microsoft.servicebus.json"
[rest AddHeader: @"Content-Type" value: @"application/vnd.microsoft.servicebus.json"];

CkoStringBuilder *sbResponseBody = [[CkoStringBuilder alloc] init];
success = [rest FullRequestSb: @"POST" uriPath: [sbPath GetAsString] requestBody: sbRequestBody responseBody: sbResponseBody];
if (success != YES) {
    NSLog(@"%@",rest.LastErrorText);
    return;
}

NSLog(@"%@%d",@"Response Status Code = ",[rest.ResponseStatusCode intValue]);

// Check for a success response.
if ([rest.ResponseStatusCode intValue] != 201) {
    NSLog(@"%@",rest.LastRequestStartLine);
    NSLog(@"%@",rest.LastRequestHeader);
    NSLog(@"%@",[sbResponseBody GetAsString]);
    NSLog(@"%@",@"Failed.");
    return;
}

// If successful, the 201 response will have no response body.

NSLog(@"%@",@"Success.");