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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,34 @@ | ||
| package internal | ||
|
|
||
| import "github.com/segmentio/kafka-go" | ||
|
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| type Message struct { | ||
| *kafka.Message | ||
| } | ||
|
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| func NewMessage(msg *kafka.Message) *Message { | ||
| return &Message{Message: msg} | ||
| } | ||
|
|
||
| func (m *Message) GetHeader(key string) string { | ||
| for _, h := range m.Headers { | ||
| if h.Key == key { | ||
| return string(h.Value) | ||
| } | ||
| } | ||
| return "" | ||
| } | ||
|
|
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| func (m *Message) SetHeader(key, val string) { | ||
| // Ensure uniqueness of keys | ||
| for i := 0; i < len(m.Headers); i++ { | ||
| if m.Headers[i].Key == key { | ||
| m.Headers = append(m.Headers[:i], m.Headers[i+1:]...) | ||
| i-- | ||
| } | ||
| } | ||
| m.Headers = append(m.Headers, kafka.Header{ | ||
| Key: key, | ||
| Value: []byte(val), | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,57 @@ | ||
| package internal | ||
|
|
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| import ( | ||
| "testing" | ||
|
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| "github.com/segmentio/kafka-go" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
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| func TestMessageGetHeader(t *testing.T) { | ||
| testCases := []struct { | ||
| name string | ||
| msg *Message | ||
| key string | ||
| expected string | ||
| }{ | ||
| { | ||
| name: "exists", | ||
| msg: &Message{ | ||
| Message: &kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}, | ||
| }}}, | ||
| key: "foo", | ||
| expected: "bar", | ||
| }, | ||
| { | ||
| name: "not exists", | ||
| msg: &Message{Message: &kafka.Message{Headers: []kafka.Header{}}}, | ||
| key: "foo", | ||
| expected: "", | ||
| }, | ||
| } | ||
|
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| for _, tc := range testCases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| result := tc.msg.GetHeader(tc.key) | ||
| assert.Equal(t, tc.expected, result) | ||
| }) | ||
| } | ||
| } | ||
|
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| func TestMessageSetHeader(t *testing.T) { | ||
| msg := &Message{Message: &kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}}, | ||
| }} | ||
|
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| msg.SetHeader("foo", "bar2") | ||
| msg.SetHeader("foo2", "bar2") | ||
| msg.SetHeader("foo2", "bar3") | ||
| msg.SetHeader("foo3", "bar4") | ||
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| assert.ElementsMatch(t, msg.Headers, []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar2")}, | ||
| {Key: "foo2", Value: []byte("bar3")}, | ||
| {Key: "foo3", Value: []byte("bar4")}, | ||
| }) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| package internal | ||
|
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| import "go.opentelemetry.io/otel/propagation" | ||
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| var _ propagation.TextMapCarrier = (*MessageCarrier)(nil) | ||
|
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| // MessageCarrier injects and extracts traces from a types.Message. | ||
| type MessageCarrier struct { | ||
| msg *Message | ||
| } | ||
|
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| // NewMessageCarrier returns a new MessageCarrier. | ||
| func NewMessageCarrier(msg *Message) MessageCarrier { | ||
| return MessageCarrier{msg: msg} | ||
| } | ||
|
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| // Get returns the value associated with the passed key. | ||
| func (m MessageCarrier) Get(key string) string { | ||
| return m.msg.GetHeader(key) | ||
| } | ||
|
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| // Set stores the key-value pair. | ||
| func (m MessageCarrier) Set(key string, value string) { | ||
| m.msg.SetHeader(key, value) | ||
| } | ||
|
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| // Keys lists the keys stored in this carrier. | ||
| func (m MessageCarrier) Keys() []string { | ||
| out := make([]string, len(m.msg.Headers)) | ||
| for i, h := range m.msg.Headers { | ||
| out[i] = h.Key | ||
| } | ||
|
|
||
| return out | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| package internal | ||
|
|
||
| import ( | ||
| "testing" | ||
|
|
||
| "github.com/segmentio/kafka-go" | ||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestMessageCarrierGet(t *testing.T) { | ||
| testCases := []struct { | ||
| name string | ||
| carrier MessageCarrier | ||
| key string | ||
| expected string | ||
| }{ | ||
| { | ||
| name: "exists", | ||
| carrier: NewMessageCarrier(&Message{&kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}, | ||
| }}}), | ||
| key: "foo", | ||
| expected: "bar", | ||
| }, | ||
| { | ||
| name: "not exists", | ||
| carrier: NewMessageCarrier(&Message{&kafka.Message{Headers: []kafka.Header{}}}), | ||
| key: "foo", | ||
| expected: "", | ||
| }, | ||
| } | ||
|
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| for _, tc := range testCases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| result := tc.carrier.Get(tc.key) | ||
| assert.Equal(t, tc.expected, result) | ||
| }) | ||
| } | ||
| } | ||
|
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| func TestMessageCarrierSet(t *testing.T) { | ||
| msg := Message{&kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}, | ||
| }}} | ||
| carrier := MessageCarrier{msg: &msg} | ||
|
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| carrier.Set("foo", "bar2") | ||
| carrier.Set("foo2", "bar2") | ||
| carrier.Set("foo2", "bar3") | ||
| carrier.Set("foo3", "bar4") | ||
|
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| assert.ElementsMatch(t, carrier.msg.Headers, []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar2")}, | ||
| {Key: "foo2", Value: []byte("bar3")}, | ||
| {Key: "foo3", Value: []byte("bar4")}, | ||
| }) | ||
| } | ||
|
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| func TestMessageCarrierKeys(t *testing.T) { | ||
| testCases := []struct { | ||
| name string | ||
| carrier MessageCarrier | ||
| expected []string | ||
| }{ | ||
| { | ||
| name: "one", | ||
| carrier: MessageCarrier{msg: &Message{&kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}, | ||
| }}}}, | ||
| expected: []string{"foo"}, | ||
| }, | ||
| { | ||
| name: "none", | ||
| carrier: MessageCarrier{msg: &Message{&kafka.Message{Headers: []kafka.Header{}}}}, | ||
| expected: []string{}, | ||
| }, | ||
| { | ||
| name: "many", | ||
| carrier: MessageCarrier{msg: &Message{&kafka.Message{Headers: []kafka.Header{ | ||
| {Key: "foo", Value: []byte("bar")}, | ||
| {Key: "baz", Value: []byte("quux")}, | ||
| }}}}, | ||
| expected: []string{"foo", "baz"}, | ||
| }, | ||
| } | ||
|
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| for _, tc := range testCases { | ||
| t.Run(tc.name, func(t *testing.T) { | ||
| result := tc.carrier.Keys() | ||
| assert.Equal(t, tc.expected, result) | ||
| }) | ||
| } | ||
| } |
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