72 lines
2.2 KiB
Zig
72 lines
2.2 KiB
Zig
// This file is licensed under the CC0 1.0 license.
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// See: https://creativecommons.org/publicdomain/zero/1.0/legalcode
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const std = @import("std");
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const nats = @import("nats");
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pub fn main() !void {
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const connection = try nats.Connection.connectTo(nats.default_server_url);
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defer connection.destroy();
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const message = try nats.Message.create("subject", null, "message");
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defer message.destroy();
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try message.setHeaderValue("foo", "foo-value");
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try message.setHeaderValue("bar", "bar-value");
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try message.addHeaderValue("foo", "bar-value");
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try message.setHeaderValue("baz", "baz-value");
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try message.addHeaderValue("qux", "qux-value");
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try message.deleteHeader("baz");
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{
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var iter = try message.getHeaderIterator();
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defer iter.destroy();
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while (iter.next()) |header| {
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var val_iter = try header.valueIterator();
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defer val_iter.destroy();
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std.debug.print("key '{s}' got: ", .{header.key});
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while (val_iter.next()) |value| {
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std.debug.print("'{s}'{s}", .{ value, if (val_iter.peek()) |_| ", " else "" });
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}
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std.debug.print("\n", .{});
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}
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}
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const subscription = try connection.subscribeSync("subject");
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defer subscription.destroy();
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try connection.publishMessage(message);
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const received = try subscription.nextMessage(1000);
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defer received.destroy();
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{
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var iter = try received.getHeaderValueIterator("foo");
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defer iter.destroy();
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std.debug.print("For key 'foo' got: ", .{});
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while (iter.next()) |value| {
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std.debug.print("'{s}'{s}", .{ value, if (iter.peek()) |_| ", " else "" });
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}
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std.debug.print("\n", .{});
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}
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_ = received.getHeaderValue("key-does-not-exist") catch |err| switch (err) {
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nats.Error.NotFound => {},
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else => {
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std.debug.print("Should not have found that key!", .{});
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return err;
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},
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};
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received.deleteHeader("key-does-not-exist") catch |err| switch (err) {
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nats.Error.NotFound => {},
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else => {
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std.debug.print("Should not have found that key!", .{});
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return err;
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},
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};
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}
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