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introduced scoped log

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This commit is contained in:
Emil Lerch 2023-08-01 19:44:56 -07:00
parent b69bc44aaf
commit 2c8eb248f8
Signed by untrusted user: lobo
GPG Key ID: A7B62D657EF764F8
1 changed files with 16 additions and 13 deletions
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29
src/lambda.zig
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@ -2,6 +2,8 @@ const std = @import("std");
const HandlerFn = *const fn (std.mem.Allocator, []const u8) anyerror![]const u8; const HandlerFn = *const fn (std.mem.Allocator, []const u8) anyerror![]const u8;
const log = std.log.scoped(.lambda);
/// Starts the lambda framework. Handler will be called when an event is processing /// Starts the lambda framework. Handler will be called when an event is processing
/// If an allocator is not provided, an approrpriate allocator will be selected and used /// If an allocator is not provided, an approrpriate allocator will be selected and used
pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // TODO: remove inferred error set? pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // TODO: remove inferred error set?
@ -22,7 +24,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
defer client.deinit(); defer client.deinit();
var empty_headers = std.http.Headers.init(alloc); var empty_headers = std.http.Headers.init(alloc);
defer empty_headers.deinit(); defer empty_headers.deinit();
std.log.info("Bootstrap initializing with event url: {s}", .{url}); log.info("tid {d} (lambda): Bootstrap initializing with event url: {s}", .{ std.Thread.getCurrentId(), url });
while (true) { while (true) {
var req_alloc = std.heap.ArenaAllocator.init(alloc); var req_alloc = std.heap.ArenaAllocator.init(alloc);
@ -32,7 +34,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
defer req.deinit(); defer req.deinit();
req.start() catch |err| { // Well, at this point all we can do is shout at the void req.start() catch |err| { // Well, at this point all we can do is shout at the void
std.log.err("Get fail (start): {}", .{err}); log.err("Get fail (start): {}", .{err});
std.os.exit(0); std.os.exit(0);
continue; continue;
}; };
@ -40,7 +42,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
// Lambda freezes the process at this line of code. During warm start, // Lambda freezes the process at this line of code. During warm start,
// the process will unfreeze and data will be sent in response to client.get // the process will unfreeze and data will be sent in response to client.get
req.wait() catch |err| { // Well, at this point all we can do is shout at the void req.wait() catch |err| { // Well, at this point all we can do is shout at the void
std.log.err("Get fail (wait): {}", .{err}); log.err("Get fail (wait): {}", .{err});
std.os.exit(0); std.os.exit(0);
continue; continue;
}; };
@ -49,7 +51,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
// Lambda infrastrucutre restarts, so it's unclear if that's necessary. // Lambda infrastrucutre restarts, so it's unclear if that's necessary.
// It seems as though a continue should be fine, and slightly faster // It seems as though a continue should be fine, and slightly faster
// std.os.exit(1); // std.os.exit(1);
std.log.err("Get fail: {} {s}", .{ log.err("Get fail: {} {s}", .{
@intFromEnum(req.response.status), @intFromEnum(req.response.status),
req.response.status.phrase() orelse "", req.response.status.phrase() orelse "",
}); });
@ -64,7 +66,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
if (std.ascii.eqlIgnoreCase(h.name, "Content-Length")) { if (std.ascii.eqlIgnoreCase(h.name, "Content-Length")) {
content_length = std.fmt.parseUnsigned(usize, h.value, 10) catch null; content_length = std.fmt.parseUnsigned(usize, h.value, 10) catch null;
if (content_length == null) if (content_length == null)
std.log.warn("Error parsing content length value: '{s}'", .{h.value}); log.warn("Error parsing content length value: '{s}'", .{h.value});
} }
// TODO: XRay uses an environment variable to do its magic. It's our // TODO: XRay uses an environment variable to do its magic. It's our
// responsibility to set this, but no zig-native setenv(3)/putenv(3) // responsibility to set this, but no zig-native setenv(3)/putenv(3)
@ -78,10 +80,11 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
// We can't report back an issue because the runtime error reporting endpoint // We can't report back an issue because the runtime error reporting endpoint
// uses request id in its path. So the best we can do is log the error and move // uses request id in its path. So the best we can do is log the error and move
// on here. // on here.
std.log.err("Could not find request id: skipping request", .{}); log.err("Could not find request id: skipping request", .{});
continue; continue;
} }
const req_id = request_id.?; const req_id = request_id.?;
log.debug("got lambda request with id {s}", .{req_id});
const reader = req.reader(); const reader = req.reader();
var buf: [65535]u8 = undefined; var buf: [65535]u8 = undefined;
@ -89,7 +92,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
var resp_payload = std.ArrayList(u8).init(req_allocator); var resp_payload = std.ArrayList(u8).init(req_allocator);
if (content_length) |len| { if (content_length) |len| {
resp_payload.ensureTotalCapacity(len) catch { resp_payload.ensureTotalCapacity(len) catch {
std.log.err("Could not allocate memory for body of request id: {s}", .{request_id.?}); log.err("Could not allocate memory for body of request id: {s}", .{request_id.?});
continue; continue;
}; };
} }
@ -105,9 +108,9 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
// Stack trace will return null if stripped // Stack trace will return null if stripped
const return_trace = @errorReturnTrace(); const return_trace = @errorReturnTrace();
if (return_trace) |rt| if (return_trace) |rt|
std.log.err("Caught error: {}. Return Trace: {any}", .{ err, rt }) log.err("Caught error: {}. Return Trace: {any}", .{ err, rt })
else else
std.log.err("Caught error: {}. No return trace available", .{err}); log.err("Caught error: {}. No return trace available", .{err});
const err_url = try std.fmt.allocPrint(req_allocator, "{s}{s}/runtime/invocation/{s}/error", .{ prefix, lambda_runtime_uri, req_id }); const err_url = try std.fmt.allocPrint(req_allocator, "{s}{s}/runtime/invocation/{s}/error", .{ prefix, lambda_runtime_uri, req_id });
defer req_allocator.free(err_url); defer req_allocator.free(err_url);
const err_uri = try std.Uri.parse(err_url); const err_uri = try std.Uri.parse(err_url);
@ -123,7 +126,7 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
else else
try std.fmt.allocPrint(req_allocator, content, .{ "{", @errorName(err), "no return trace available", "}" }); try std.fmt.allocPrint(req_allocator, content, .{ "{", @errorName(err), "no return trace available", "}" });
defer req_allocator.free(content_fmt); defer req_allocator.free(content_fmt);
std.log.err("Posting to {s}: Data {s}", .{ err_url, content_fmt }); log.err("Posting to {s}: Data {s}", .{ err_url, content_fmt });
var err_headers = std.http.Headers.init(req_allocator); var err_headers = std.http.Headers.init(req_allocator);
defer err_headers.deinit(); defer err_headers.deinit();
@ -131,20 +134,20 @@ pub fn run(allocator: ?std.mem.Allocator, event_handler: HandlerFn) !void { // T
"Lambda-Runtime-Function-Error-Type", "Lambda-Runtime-Function-Error-Type",
"HandlerReturned", "HandlerReturned",
) catch |append_err| { ) catch |append_err| {
std.log.err("Error appending error header to post response for request id {s}: {}", .{ req_id, append_err }); log.err("Error appending error header to post response for request id {s}: {}", .{ req_id, append_err });
std.os.exit(0); std.os.exit(0);
continue; continue;
}; };
var err_req = try client.request(.POST, err_uri, empty_headers, .{}); var err_req = try client.request(.POST, err_uri, empty_headers, .{});
defer err_req.deinit(); defer err_req.deinit();
err_req.start() catch |post_err| { // Well, at this point all we can do is shout at the void err_req.start() catch |post_err| { // Well, at this point all we can do is shout at the void
std.log.err("Error posting response for request id {s}: {}", .{ req_id, post_err }); log.err("Error posting response for request id {s}: {}", .{ req_id, post_err });
std.os.exit(0); std.os.exit(0);
continue; continue;
}; };
err_req.wait() catch |post_err| { // Well, at this point all we can do is shout at the void err_req.wait() catch |post_err| { // Well, at this point all we can do is shout at the void
std.log.err("Error posting response for request id {s}: {}", .{ req_id, post_err }); log.err("Error posting response for request id {s}: {}", .{ req_id, post_err });
std.os.exit(0); std.os.exit(0);
continue; continue;
}; };