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Introduce pprofile.PutAttribute helper
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‎.chloggen/profiles-PutAttributes.yaml‎

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# Use this changelog template to create an entry for release notes.
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# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
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change_type: enhancement
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# The name of the component, or a single word describing the area of concern, (e.g. otlpreceiver)
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component: pdata/profile
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# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
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note: Introduce PutAttribute helper method to modify the content of attributable records.
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# One or more tracking issues or pull requests related to the change
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issues: [12798]
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# (Optional) One or more lines of additional information to render under the primary note.
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# These lines will be padded with 2 spaces and then inserted directly into the document.
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# Use pipe (|) for multiline entries.
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subtext:
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# Optional: The change log or logs in which this entry should be included.
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# e.g. '[user]' or '[user, api]'
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# Include 'user' if the change is relevant to end users.
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# Include 'api' if there is a change to a library API.
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# Default: '[user]'
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change_logs: [api]

‎pdata/pprofile/attributes.go‎

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@@ -66,3 +66,61 @@ func AddAttribute(table AttributeTableSlice, record attributable, key string, va
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return nil
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}
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// PutAttribute updates an AttributeTable and a record's AttributeIndices to
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// add a new attribute.
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// The assumption is that attributes are a map as for other signals (metrics, logs, etc.), thus
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// the same key must not appear twice in a list of attributes / attribute indices.
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// The record can be any struct that implements an `AttributeIndices` method.
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func PutAttribute(table AttributeTableSlice, record attributable, key string, value pcommon.Value) error {
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for i := range record.AttributeIndices().Len() {
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idx := record.AttributeIndices().At(i)
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attr := table.At(int(idx))
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if attr.Key() == key {
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if attr.Value().Equal(value) {
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// Attribute already exists, nothing to do.
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return nil
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}
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// Attribute exists, but the value is different, so update it.
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// If the attribute table already contains the key/value pair, just update the index.
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for j := range table.Len() {
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a := table.At(j)
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if a.Key() == key && a.Value().Equal(value) {
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if j >= math.MaxInt32 {
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return fmt.Errorf("attribute %s=%#v has too high an index %d to be added to AttributeIndices", key, value, j)
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}
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record.AttributeIndices().SetAt(i, int32(j)) //nolint:gosec // overflow checked
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return nil
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}
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}
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// Add the key/value pair as a new attribute to the table...
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entry := table.AppendEmpty()
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entry.SetKey(key)
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value.CopyTo(entry.Value())
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if table.Len() >= math.MaxInt32 {
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return errors.New("AttributeTable can't take more attributes")
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}
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// ...and update the index.
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record.AttributeIndices().SetAt(i, int32(table.Len()-1)) //nolint:gosec // overflow checked
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return nil
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}
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}
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// Add the key/value pair as a new attribute to the table...
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entry := table.AppendEmpty()
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entry.SetKey(key)
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value.CopyTo(entry.Value())
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if table.Len() >= math.MaxInt32 {
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return errors.New("AttributeTable can't take more attributes")
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}
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// ...and add to the index.
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record.AttributeIndices().Append(int32(table.Len() - 1)) //nolint:gosec // overflow checked
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return nil
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}

‎pdata/pprofile/attributes_test.go‎

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@@ -74,6 +74,48 @@ func TestAddAttribute(t *testing.T) {
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assert.Equal(t, []int32{0}, mapp.AttributeIndices().AsRaw())
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}
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func TestPutAttribute(t *testing.T) {
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table := NewAttributeTableSlice()
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indices := NewProfile()
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// Put a first attribute.
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require.NoError(t, PutAttribute(table, indices, "hello", pcommon.NewValueStr("world")))
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assert.Equal(t, 1, table.Len())
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assert.Equal(t, []int32{0}, indices.AttributeIndices().AsRaw())
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// Put an attribute, same key, same value.
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// This should be a no-op.
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require.NoError(t, PutAttribute(table, indices, "hello", pcommon.NewValueStr("world")))
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assert.Equal(t, 1, table.Len())
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assert.Equal(t, []int32{0}, indices.AttributeIndices().AsRaw())
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// Put an attribute, same key, different value.
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// This updates the index and adds to the table.
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fmt.Printf("test\n")
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require.NoError(t, PutAttribute(table, indices, "hello", pcommon.NewValueStr("world2")))
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assert.Equal(t, 2, table.Len())
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assert.Equal(t, []int32{1}, indices.AttributeIndices().AsRaw())
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// Put an attribute that already exists in the table.
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// This updates the index and does not add to the table.
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require.NoError(t, PutAttribute(table, indices, "hello", pcommon.NewValueStr("world")))
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assert.Equal(t, 2, table.Len())
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assert.Equal(t, []int32{0}, indices.AttributeIndices().AsRaw())
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// Put a new attribute.
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// This adds an index and adds to the table.
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require.NoError(t, PutAttribute(table, indices, "good", pcommon.NewValueStr("day")))
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assert.Equal(t, 3, table.Len())
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assert.Equal(t, []int32{0, 2}, indices.AttributeIndices().AsRaw())
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// Add multiple distinct attributes.
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for i := range 100 {
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require.NoError(t, PutAttribute(table, indices, fmt.Sprintf("key_%d", i), pcommon.NewValueStr("day")))
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assert.Equal(t, i+4, table.Len())
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assert.Equal(t, i+3, indices.AttributeIndices().Len())
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}
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}
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func BenchmarkFromAttributeIndices(b *testing.B) {
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table := NewAttributeTableSlice()
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@@ -162,3 +204,72 @@ func BenchmarkAddAttribute(b *testing.B) {
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})
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}
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}
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func BenchmarkPutAttribute(b *testing.B) {
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for _, bb := range []struct {
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name string
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key string
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value pcommon.Value
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runBefore func(*testing.B, AttributeTableSlice, attributable)
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}{
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{
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name: "with a new string attribute",
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key: "attribute",
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value: pcommon.NewValueStr("test"),
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},
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{
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name: "with an existing attribute",
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key: "attribute",
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value: pcommon.NewValueStr("test"),
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runBefore: func(_ *testing.B, table AttributeTableSlice, _ attributable) {
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entry := table.AppendEmpty()
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entry.SetKey("attribute")
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entry.Value().SetStr("test")
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},
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},
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{
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name: "with a duplicate attribute",
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key: "attribute",
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value: pcommon.NewValueStr("test"),
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runBefore: func(_ *testing.B, table AttributeTableSlice, obj attributable) {
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require.NoError(b, PutAttribute(table, obj, "attribute", pcommon.NewValueStr("test")))
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},
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},
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{
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name: "with a hundred attributes to loop through",
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key: "attribute",
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value: pcommon.NewValueStr("test"),
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runBefore: func(_ *testing.B, table AttributeTableSlice, _ attributable) {
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for i := range 100 {
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entry := table.AppendEmpty()
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entry.SetKey(fmt.Sprintf("attr_%d", i))
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entry.Value().SetStr("test")
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}
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entry := table.AppendEmpty()
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entry.SetKey("attribute")
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entry.Value().SetStr("test")
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},
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},
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} {
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b.Run(bb.name, func(b *testing.B) {
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table := NewAttributeTableSlice()
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obj := NewLocation()
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if bb.runBefore != nil {
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bb.runBefore(b, table, obj)
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}
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b.ResetTimer()
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b.ReportAllocs()
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for n := 0; n < b.N; n++ {
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_ = PutAttribute(table, obj, bb.key, bb.value)
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}
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})
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}
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}

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