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Diffstat (limited to 'test/kafka/simple-publisher')
| -rw-r--r-- | test/kafka/simple-publisher/README.md | 77 | ||||
| -rw-r--r-- | test/kafka/simple-publisher/go.mod | 10 | ||||
| -rw-r--r-- | test/kafka/simple-publisher/go.sum | 69 | ||||
| -rw-r--r-- | test/kafka/simple-publisher/main.go | 127 | ||||
| -rwxr-xr-x | test/kafka/simple-publisher/simple-publisher | bin | 0 -> 8058434 bytes |
5 files changed, 283 insertions, 0 deletions
diff --git a/test/kafka/simple-publisher/README.md b/test/kafka/simple-publisher/README.md new file mode 100644 index 000000000..8c42c8ee8 --- /dev/null +++ b/test/kafka/simple-publisher/README.md @@ -0,0 +1,77 @@ +# Simple Kafka-Go Publisher for SeaweedMQ + +This is a simple publisher client that demonstrates publishing raw messages to SeaweedMQ topics with "_" prefix, which bypass schema validation. + +## Features + +- **Schema-Free Publishing**: Topics with "_" prefix don't require schema validation +- **Raw Message Storage**: Messages are stored in a "value" field as raw bytes +- **Multiple Message Formats**: Supports JSON, binary, and empty messages +- **Kafka-Go Compatible**: Uses the popular kafka-go library + +## Prerequisites + +1. **SeaweedMQ Running**: Make sure SeaweedMQ is running on `localhost:17777` (default Kafka port) +2. **Go Modules**: The project uses Go modules for dependency management + +## Setup and Run + +```bash +# Navigate to the publisher directory +cd test/kafka/simple-publisher + +# Download dependencies +go mod tidy + +# Run the publisher +go run main.go +``` + +## Expected Output + +``` +Publishing messages to topic '_raw_messages' on broker 'localhost:17777' +Publishing messages... +- Published message 1: {"id":1,"message":"Hello from kafka-go client",...} +- Published message 2: {"id":2,"message":"Raw message without schema validation",...} +- Published message 3: {"id":3,"message":"Testing SMQ with underscore prefix topic",...} + +Publishing different raw message formats... +- Published raw message 1: key=binary_key, value=Simple string message +- Published raw message 2: key=json_key, value={"raw_field": "raw_value", "number": 42} +- Published raw message 3: key=empty_key, value= +- Published raw message 4: key=, value=Message with no key + +All test messages published to topic with '_' prefix! +These messages should be stored as raw bytes without schema validation. +``` + +## Topic Naming Convention + +- **Schema-Required Topics**: `user-events`, `orders`, `payments` (require schema validation) +- **Schema-Free Topics**: `_raw_messages`, `_logs`, `_metrics` (bypass schema validation) + +The "_" prefix tells SeaweedMQ to treat the topic as a system topic and skip schema processing entirely. + +## Message Storage + +For topics with "_" prefix: +- Messages are stored as raw bytes without schema validation +- No Confluent Schema Registry envelope is required +- Any binary data or text can be published +- SMQ assumes raw messages are stored in a "value" field internally + +## Integration with SeaweedMQ + +This client works with SeaweedMQ's existing schema bypass logic: + +1. **`isSystemTopic()`** function identifies "_" prefix topics as system topics +2. **`produceSchemaBasedRecord()`** bypasses schema processing for system topics +3. **Raw storage** via `seaweedMQHandler.ProduceRecord()` stores messages as-is + +## Use Cases + +- **Log ingestion**: Store application logs without predefined schema +- **Metrics collection**: Publish time-series data in various formats +- **Raw data pipelines**: Process unstructured data before applying schemas +- **Development/testing**: Quickly publish test data without schema setup diff --git a/test/kafka/simple-publisher/go.mod b/test/kafka/simple-publisher/go.mod new file mode 100644 index 000000000..09309f0f2 --- /dev/null +++ b/test/kafka/simple-publisher/go.mod @@ -0,0 +1,10 @@ +module simple-publisher + +go 1.21 + +require github.com/segmentio/kafka-go v0.4.47 + +require ( + github.com/klauspost/compress v1.17.0 // indirect + github.com/pierrec/lz4/v4 v4.1.15 // indirect +) diff --git a/test/kafka/simple-publisher/go.sum b/test/kafka/simple-publisher/go.sum new file mode 100644 index 000000000..c9f731f2b --- /dev/null +++ b/test/kafka/simple-publisher/go.sum @@ -0,0 +1,69 @@ +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/klauspost/compress v1.15.9/go.mod h1:PhcZ0MbTNciWF3rruxRgKxI5NkcHHrHUDtV4Yw2GlzU= +github.com/klauspost/compress v1.17.0 h1:Rnbp4K9EjcDuVuHtd0dgA4qNuv9yKDYKK1ulpJwgrqM= +github.com/klauspost/compress v1.17.0/go.mod h1:ntbaceVETuRiXiv4DpjP66DpAtAGkEQskQzEyD//IeE= +github.com/pierrec/lz4/v4 v4.1.15 h1:MO0/ucJhngq7299dKLwIMtgTfbkoSPF6AoMYDd8Q4q0= +github.com/pierrec/lz4/v4 v4.1.15/go.mod h1:gZWDp/Ze/IJXGXf23ltt2EXimqmTUXEy0GFuRQyBid4= +github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM= +github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4= +github.com/segmentio/kafka-go v0.4.47 h1:IqziR4pA3vrZq7YdRxaT3w1/5fvIH5qpCwstUanQQB0= +github.com/segmentio/kafka-go v0.4.47/go.mod h1:HjF6XbOKh0Pjlkr5GVZxt6CsjjwnmhVOfURM5KMd8qg= +github.com/stretchr/objx v0.1.0/go.mod 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h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= +gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= +gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/test/kafka/simple-publisher/main.go b/test/kafka/simple-publisher/main.go new file mode 100644 index 000000000..6b7b4dffe --- /dev/null +++ b/test/kafka/simple-publisher/main.go @@ -0,0 +1,127 @@ +package main + +import ( + "context" + "encoding/json" + "fmt" + "log" + "time" + + "github.com/segmentio/kafka-go" +) + +func main() { + // Configuration + brokerAddress := "localhost:9093" // Kafka gateway port (not SeaweedMQ broker port 17777) + topicName := "_raw_messages" // Topic with "_" prefix - should skip schema validation + + fmt.Printf("Publishing messages to topic '%s' on broker '%s'\n", topicName, brokerAddress) + + // Create a new writer + writer := &kafka.Writer{ + Addr: kafka.TCP(brokerAddress), + Topic: topicName, + Balancer: &kafka.LeastBytes{}, + // Configure for immediate delivery (useful for testing) + BatchTimeout: 10 * time.Millisecond, + BatchSize: 1, + } + defer writer.Close() + + // Sample data to publish + messages := []map[string]interface{}{ + { + "id": 1, + "message": "Hello from kafka-go client", + "timestamp": time.Now().Unix(), + "user_id": "user123", + }, + { + "id": 2, + "message": "Raw message without schema validation", + "timestamp": time.Now().Unix(), + "user_id": "user456", + "metadata": map[string]string{ + "source": "test-client", + "type": "raw", + }, + }, + { + "id": 3, + "message": "Testing SMQ with underscore prefix topic", + "timestamp": time.Now().Unix(), + "user_id": "user789", + "data": []byte("Some binary data here"), + }, + } + + ctx := context.Background() + + fmt.Println("Publishing messages...") + for i, msgData := range messages { + // Convert message to JSON (simulating raw messages stored in "value" field) + valueBytes, err := json.Marshal(msgData) + if err != nil { + log.Fatalf("Failed to marshal message %d: %v", i+1, err) + } + + // Create Kafka message + msg := kafka.Message{ + Key: []byte(fmt.Sprintf("key_%d", msgData["id"])), + Value: valueBytes, + Headers: []kafka.Header{ + {Key: "source", Value: []byte("kafka-go-client")}, + {Key: "content-type", Value: []byte("application/json")}, + }, + } + + // Write message + err = writer.WriteMessages(ctx, msg) + if err != nil { + log.Printf("Failed to write message %d: %v", i+1, err) + continue + } + + fmt.Printf("-Published message %d: %s\n", i+1, string(valueBytes)) + + // Small delay between messages + time.Sleep(100 * time.Millisecond) + } + + fmt.Println("\nAll messages published successfully!") + + // Test with different raw message types + fmt.Println("\nPublishing different raw message formats...") + + rawMessages := []kafka.Message{ + { + Key: []byte("binary_key"), + Value: []byte("Simple string message"), + }, + { + Key: []byte("json_key"), + Value: []byte(`{"raw_field": "raw_value", "number": 42}`), + }, + { + Key: []byte("empty_key"), + Value: []byte{}, // Empty value + }, + { + Key: nil, // No key + Value: []byte("Message with no key"), + }, + } + + for i, msg := range rawMessages { + err := writer.WriteMessages(ctx, msg) + if err != nil { + log.Printf("Failed to write raw message %d: %v", i+1, err) + continue + } + fmt.Printf("-Published raw message %d: key=%s, value=%s\n", + i+1, string(msg.Key), string(msg.Value)) + } + + fmt.Println("\nAll test messages published to topic with '_' prefix!") + fmt.Println("These messages should be stored as raw bytes without schema validation.") +} diff --git a/test/kafka/simple-publisher/simple-publisher b/test/kafka/simple-publisher/simple-publisher Binary files differnew file mode 100755 index 000000000..e53b44407 --- /dev/null +++ b/test/kafka/simple-publisher/simple-publisher |