Add getCurrentSpan and fix a bug in extractSpan

api/trace/+opentelemetry/+trace/Context.m

@@ -7,8 +7,7 @@
         function sp = extractSpan(context)
             % Extract span from context
             %    SP = OPENTELEMETRY.TRACE.CONTEXT.EXTRACTSPAN(CTXT) extracts
-            %    span SP from a context object CTXT. SP is a nonrecording span 
-            %    such that ISRECORDING(SP) returns false. If CTXT does not 
+            %    span SP from a context object CTXT. If CTXT does not 
             %    contain any spans, SP will be an invalid span with all-zero
             %    trace and span IDs.
             %

api/trace/+opentelemetry/+trace/Span.m

@@ -20,7 +20,6 @@
                 obj.Proxy = libmexclass.proxy.Proxy("Name", ...
                     "libmexclass.opentelemetry.SpanProxy", ...
                     "ConstructorArguments", {context.Proxy.ID});
-                obj.Name = "";   % unknown name when span is extracted from context, leave blank
             else   % in is a proxy object
                 obj.Proxy = proxy;
                 obj.Name = spname;

api/trace/+opentelemetry/+trace/getCurrentSpan.m

@@ -0,0 +1,14 @@
+function sp = getCurrentSpan()
+% Retrieve the current span
+%    SP = OPENTELEMETRY.TRACE.GETCURRENTSPAN() returns the current span.
+%    If there is not current span, SP will be an invalid span with all-zero
+%    trace and span IDs.
+%
+%    See also OPENTELEMETRY.TRACE.SPAN,
+%    OPENTELEMETRY.CONTEXT.GETCURRENTCONTEXT
+%    OPENTELEMETRY.TRACE.CONTEXT.EXTRACTSPAN
+
+% Copyright 2024 The MathWorks, Inc.
+
+ctx = opentelemetry.context.getCurrentContext;
+sp = opentelemetry.trace.Context.extractSpan(ctx);

auto-instrumentation/+opentelemetry/+autoinstrument/AutoTrace.m

@@ -150,7 +150,7 @@ function handleError(obj, ME)
             %    spans and their corresponding scopes. Rethrow the
             %    exception ME.
             if ~isempty(obj.Instrumentor.Spans)
-                setStatus(obj.Instrumentor.Spans(end), "Error");
+                setStatus(obj.Instrumentor.Spans(end), "Error", ME.message);
                 for i = length(obj.Instrumentor.Spans):-1:1
                     obj.Instrumentor.Spans(i) = [];
                     obj.Instrumentor.Scopes(i) = [];
@@ -195,4 +195,4 @@ function handleError(obj, ME)
     % file
     f = processFileInput(f);
 end
-end
+end

test/autotrace_examples/manual_instrumented_example/manual_instrumented_example.m

@@ -4,5 +4,9 @@
 
 % Copyright 2024 The MathWorks, Inc.
 
+% add an attribute about input
+sp = opentelemetry.trace.getCurrentSpan;
+setAttributes(sp, "DataSize", n);
+
 [x, y] = generate_data(n);
 yf = best_fit_line(x,y);

test/tautotrace.m

@@ -253,6 +253,8 @@ function testError(testCase)
 
             % check error status
             verifyEqual(testCase, results{1}.resourceSpans.scopeSpans.spans.status.code, 2);  % error 
+            verifyEqual(testCase, results{1}.resourceSpans.scopeSpans.spans.status.message, ...
+                'Input must be a numeric scalar');  
             verifyEmpty(testCase, fieldnames(results{2}.resourceSpans.scopeSpans.spans.status));  % ok, no error
         end
 
@@ -287,6 +289,8 @@ function testHandleError(testCase)
 
             % check error status
             verifyEqual(testCase, results{1}.resourceSpans.scopeSpans.spans.status.code, 2);  % error
+            verifyEqual(testCase, results{1}.resourceSpans.scopeSpans.spans.status.message, ...
+                'Input must be a numeric scalar');  
             verifyEmpty(testCase, fieldnames(results{2}.resourceSpans.scopeSpans.spans.status));  % ok, no error
         end
 
@@ -349,7 +353,8 @@ function testAutoManualInstrument(testCase)
             at = opentelemetry.autoinstrument.AutoTrace(@manual_instrumented_example);
 
             % run the example
-            [~] = beginTrace(at, 100);
+            n = 100;
+            [~] = beginTrace(at, n);
 
             % perform test comparisons
             results = readJsonResults(testCase);
@@ -377,6 +382,11 @@ function testAutoManualInstrument(testCase)
             verifyEqual(testCase, results{1}.resourceSpans.scopeSpans.spans.parentSpanId, results{2}.resourceSpans.scopeSpans.spans.spanId);
             verifyEqual(testCase, results{3}.resourceSpans.scopeSpans.spans.parentSpanId, results{5}.resourceSpans.scopeSpans.spans.spanId);
             verifyEqual(testCase, results{4}.resourceSpans.scopeSpans.spans.parentSpanId, results{5}.resourceSpans.scopeSpans.spans.spanId);
+
+            % check attribute
+            verifyNumElements(testCase, results{6}.resourceSpans.scopeSpans.spans.attributes, 1);
+            verifyEqual(testCase, results{6}.resourceSpans.scopeSpans.spans.attributes.key, 'DataSize');
+            verifyEqual(testCase, results{6}.resourceSpans.scopeSpans.spans.attributes.value.doubleValue, n);
         end
     end
 end