Rust

Azure Service Bus - Send Batch of Messages to Topic or Queue

See more Azure Service Bus Examples

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

// 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.
let rest = chilkat::Rest::new();
let b_auto_reconnect = true;
if rest.connect("<yournamespace>.servicebus.windows.net", 443, true, b_auto_reconnect).is_err() {
    println!("{}", rest.last_error_text());
    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.
let sb_token = chilkat::StringBuilder::new();
let _ = sb_token.load_file("qa_data/tokens/serviceBusSas.txt", "utf-8");

// Tell the REST object to use the Azure Shared Access Signature for authorization.
let _ = sb_token.prepend("SharedAccessSignature ");
let _ = rest.add_header("Authorization", &sb_token.get_as_string().unwrap_or_default());

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

// Send to a topic (or queue) named "gilaMonster";
let topic_or_queue_name = "gilaMonster".to_string();

// The HTTP request body contains JSON that contains multiple messages.
let json = chilkat::JsonObject::new();
json.set_i(0);
let _ = json.update_string("messages[i].Body", "This is the first message");
let _ = json.update_string("messages[i].BrokerProperties.Label", "M1");
let _ = json.update_string("messages[i].BrokerProperties.TimeToLiveTimeSpan", "0.00:00:40");

json.set_i(1);
let _ = json.update_string("messages[i].Body", "This is the second message");
let _ = json.update_string("messages[i].BrokerProperties.Label", "M2");
let _ = json.update_string("messages[i].UserProperties.Priority", "Low");

json.set_i(2);
let _ = json.update_string("messages[i].Body", "This is the third message");
let _ = json.update_string("messages[i].BrokerProperties.Label", "M3");
let _ = json.update_string("messages[i].UserProperties.Priority", "Medium");
let _ = json.update_string("messages[i].UserProperties.Customer", "ABC");

let json_a = json.array_of("messages").unwrap();
json_a.set_emit_compact(false);
println!("{}", json_a.emit().unwrap_or_default());

// 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"
// 	    }
// 	  }
// 	]

let sb_request_body = chilkat::StringBuilder::new();
json_a.set_emit_compact(true);
let _ = json_a.emit_sb(&sb_request_body);

// Build the path..
let sb_path = chilkat::StringBuilder::new();
let _ = sb_path.append("/");
let _ = sb_path.append(&topic_or_queue_name);
let _ = sb_path.append("/messages");

// Add timeout and api-version query parameters.
let _ = rest.add_query_param("timeout", "20");

// The Content-Type should be "application/vnd.microsoft.servicebus.json"
let _ = rest.add_header("Content-Type", "application/vnd.microsoft.servicebus.json");

let sb_response_body = chilkat::StringBuilder::new();
if rest.full_request_sb("POST", &sb_path.get_as_string().unwrap_or_default(), &sb_request_body, &sb_response_body).is_err() {
    println!("{}", rest.last_error_text());
    return;
}

println!("Response Status Code = {}", rest.response_status_code());

// Check for a success response.
if rest.response_status_code() != 201 {
    println!("{}", rest.last_request_start_line());
    println!("{}", rest.last_request_header());
    println!("{}", sb_response_body.get_as_string().unwrap_or_default());
    println!("Failed.");
    return;
}

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

println!("Success.");