Zig

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. Zig

const std = @import("std");
const chilkat = @import("chilkat");

pub fn main(init: std.process.Init) !void {
    const alloc = init.arena.allocator();

    // 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.
    const rest = try chilkat.Rest.init();
    defer rest.deinit();
    const b_auto_reconnect = true;
    rest.connect("<yournamespace>.servicebus.windows.net", 443, true, b_auto_reconnect) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        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.
    const sb_token = try chilkat.StringBuilder.init();
    defer sb_token.deinit();
    sb_token.loadFile("qa_data/tokens/serviceBusSas.txt", "utf-8") catch {};

    // Tell the REST object to use the Azure Shared Access Signature for authorization.
    sb_token.prepend("SharedAccessSignature ") catch {};
    rest.addHeader("Authorization", try sb_token.getAsString(alloc)) catch {};

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

    // Send to a topic (or queue) named "gilaMonster";
    const topic_or_queue_name = "gilaMonster";

    // The HTTP request body contains JSON that contains multiple messages.
    const json = try chilkat.JsonObject.init();
    defer json.deinit();
    json.setI(0);
    json.updateString("messages[i].Body", "This is the first message") catch {};
    json.updateString("messages[i].BrokerProperties.Label", "M1") catch {};
    json.updateString("messages[i].BrokerProperties.TimeToLiveTimeSpan", "0.00:00:40") catch {};

    json.setI(1);
    json.updateString("messages[i].Body", "This is the second message") catch {};
    json.updateString("messages[i].BrokerProperties.Label", "M2") catch {};
    json.updateString("messages[i].UserProperties.Priority", "Low") catch {};

    json.setI(2);
    json.updateString("messages[i].Body", "This is the third message") catch {};
    json.updateString("messages[i].BrokerProperties.Label", "M3") catch {};
    json.updateString("messages[i].UserProperties.Priority", "Medium") catch {};
    json.updateString("messages[i].UserProperties.Customer", "ABC") catch {};

    const json_a = try json.arrayOf("messages");
    defer json_a.deinit();
    json_a.setEmitCompact(false);
    std.debug.print("{s}\n", .{try json_a.emit(alloc)});

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

    const sb_request_body = try chilkat.StringBuilder.init();
    defer sb_request_body.deinit();
    json_a.setEmitCompact(true);
    json_a.emitSb(sb_request_body) catch {};

    // Build the path..
    const sb_path = try chilkat.StringBuilder.init();
    defer sb_path.deinit();
    sb_path.append("/") catch {};
    sb_path.append(topic_or_queue_name) catch {};
    sb_path.append("/messages") catch {};

    // Add timeout and api-version query parameters.
    rest.addQueryParam("timeout", "20") catch {};

    // The Content-Type should be "application/vnd.microsoft.servicebus.json"
    rest.addHeader("Content-Type", "application/vnd.microsoft.servicebus.json") catch {};

    const sb_response_body = try chilkat.StringBuilder.init();
    defer sb_response_body.deinit();
    rest.fullRequestSb("POST", try sb_path.getAsString(alloc), sb_request_body, sb_response_body) catch {
        std.debug.print("{s}\n", .{try rest.getLastErrorText(alloc)});
        return;
    };

    std.debug.print("Response Status Code = {d}\n", .{rest.getResponseStatusCode()});

    // Check for a success response.
    if (rest.getResponseStatusCode() != 201) {
        std.debug.print("{s}\n", .{try rest.getLastRequestStartLine(alloc)});
        std.debug.print("{s}\n", .{try rest.getLastRequestHeader(alloc)});
        std.debug.print("{s}\n", .{try sb_response_body.getAsString(alloc)});
        std.debug.print("Failed.\n", .{});
        return;
    }

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

    std.debug.print("Success.\n", .{});
}