Accumulated changes for message queue (#6600)

* rename

* set agent address

* refactor

* add agent sub

* pub messages

* grpc new client

* can publish records via agent

* send init message with session id

* fmt

* check cancelled request while waiting

* use sessionId

* handle possible nil stream

* subscriber process messages

* separate debug port

* use atomic int64

* less logs

* minor

* skip io.EOF

* rename

* remove unused

* use saved offsets

* do not reuse session, since always session id is new after restart

remove last active ts from SessionEntry

* simplify printing

* purge unused

* just proxy the subscription, skipping the session step

* adjust offset types

* subscribe offset type and possible value

* start after the known tsns

* avoid wrongly set startPosition

* move

* remove

* refactor

* typo

* fix

* fix changed path

3 files changed, 213 insertions, 0 deletions

diff --git a/other/mq_client_example/agent_pub_record/agent_pub_record.go b/other/mq_client_example/agent_pub_record/agent_pub_record.go
new file mode 100644
index 000000000..48e78f530
--- /dev/null
+++ b/other/mq_client_example/agent_pub_record/agent_pub_record.go
@@ -0,0 +1,95 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/seaweedfs/seaweedfs/other/mq_client_example/example"
+	"github.com/seaweedfs/seaweedfs/weed/mq/client/agent_client"
+	"github.com/seaweedfs/seaweedfs/weed/mq/schema"
+	"log"
+	"sync"
+	"sync/atomic"
+	"time"
+)
+
+var (
+	messageCount   = flag.Int("n", 1000, "message count")
+	messageDelay   = flag.Duration("d", time.Second, "delay between messages")
+	concurrency    = flag.Int("c", 4, "concurrent publishers")
+	partitionCount = flag.Int("p", 6, "partition count")
+
+	clientName = flag.String("client", "c1", "client name")
+
+	namespace = flag.String("ns", "test", "namespace")
+	t         = flag.String("t", "test", "t")
+	agent     = flag.String("agent", "localhost:16777", "mq agent address")
+
+	counter int32
+)
+
+func genMyRecord(id int32) *example.MyRecord {
+	return &example.MyRecord{
+		Key:    []byte(fmt.Sprintf("key-%s-%d", *clientName, id)),
+		Field1: []byte(fmt.Sprintf("field1-%s-%d", *clientName, id)),
+		Field2: fmt.Sprintf("field2-%s-%d", *clientName, id),
+		Field3: id,
+		Field4: int64(id),
+		Field5: float32(id),
+		Field6: float64(id),
+		Field7: id%2 == 0,
+	}
+}
+
+func doPublish(publisher *agent_client.PublishSession, id int) {
+	startTime := time.Now()
+	for {
+		i := atomic.AddInt32(&counter, 1)
+		if i > int32(*messageCount) {
+			break
+		}
+		// Simulate publishing a message
+		myRecord := genMyRecord(int32(i))
+		if err := publisher.PublishMessageRecord(myRecord.Key, myRecord.ToRecordValue()); err != nil {
+			fmt.Println(err)
+			break
+		}
+		if *messageDelay > 0 {
+			time.Sleep(*messageDelay)
+			fmt.Printf("sent %+v\n", string(myRecord.Key))
+		}
+	}
+	elapsed := time.Since(startTime)
+	log.Printf("Publisher %s-%d finished in %s", *clientName, id, elapsed)
+}
+
+func main() {
+	flag.Parse()
+
+	recordType := example.MyRecordType()
+
+	session, err := agent_client.NewPublishSession(*agent, schema.NewSchema(*namespace, *t, recordType), *partitionCount, *clientName)
+	if err != nil {
+		log.Printf("failed to create session: %v", err)
+		return
+	}
+	defer session.CloseSession()
+
+	startTime := time.Now()
+
+	var wg sync.WaitGroup
+	// Start multiple publishers
+	for i := 0; i < *concurrency; i++ {
+		wg.Add(1)
+		go func(id int) {
+			defer wg.Done()
+			doPublish(session, id)
+		}(i)
+	}
+
+	// Wait for all publishers to finish
+	wg.Wait()
+	elapsed := time.Since(startTime)
+
+	log.Printf("Published %d messages in %s (%.2f msg/s)", *messageCount, elapsed, float64(*messageCount)/elapsed.Seconds())
+
+}
diff --git a/other/mq_client_example/agent_sub_record/agent_sub_record.go b/other/mq_client_example/agent_sub_record/agent_sub_record.go
new file mode 100644
index 000000000..21c74a46d
--- /dev/null
+++ b/other/mq_client_example/agent_sub_record/agent_sub_record.go
@@ -0,0 +1,62 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"github.com/seaweedfs/seaweedfs/other/mq_client_example/example"
+	"github.com/seaweedfs/seaweedfs/weed/mq/client/agent_client"
+	"github.com/seaweedfs/seaweedfs/weed/mq/topic"
+	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+	"github.com/seaweedfs/seaweedfs/weed/util"
+	"log"
+	"time"
+)
+
+var (
+	namespace         = flag.String("ns", "test", "namespace")
+	t                 = flag.String("topic", "test", "topic")
+	agent             = flag.String("agent", "localhost:16777", "mq agent address")
+	maxPartitionCount = flag.Int("maxPartitionCount", 3, "max partition count")
+	slidingWindowSize = flag.Int("slidingWindowSize", 1, "per partition concurrency")
+	timeAgo           = flag.Duration("timeAgo", 0, "start time before now. \"300ms\", \"1.5h\" or \"2h45m\". Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
+
+	clientId = flag.Uint("client_id", uint(util.RandomInt32()), "client id")
+)
+
+func main() {
+	flag.Parse()
+
+	// determine the start of the messages
+	var startTsNs int64
+	startType := schema_pb.OffsetType_RESUME_OR_EARLIEST
+	if *timeAgo > 0 {
+		startTsNs = time.Now().Add(-*timeAgo).UnixNano()
+		startType = schema_pb.OffsetType_EXACT_TS_NS
+	}
+
+	session, err := agent_client.NewSubscribeSession(*agent, &agent_client.SubscribeOption{
+		ConsumerGroup:           "test",
+		ConsumerGroupInstanceId: fmt.Sprintf("client-%d", *clientId),
+		Topic:                   topic.NewTopic(*namespace, *t),
+		OffsetType:              startType,
+		OffsetTsNs:              startTsNs,
+		Filter:                  "",
+		MaxSubscribedPartitions: int32(*maxPartitionCount),
+		SlidingWindowSize:       int32(*slidingWindowSize),
+	})
+	if err != nil {
+		log.Printf("new subscribe session: %v", err)
+		return
+	}
+	defer session.CloseSession()
+
+	counter := 0
+	session.SubscribeMessageRecord(func(key []byte, recordValue *schema_pb.RecordValue) {
+		counter++
+		record := example.FromRecordValue(recordValue)
+		fmt.Printf("%d %s %v\n", counter, string(key), record.Field2)
+	}, func() {
+		log.Printf("done received %d messages", counter)
+	})
+
+}
diff --git a/other/mq_client_example/example/my_record.go b/other/mq_client_example/example/my_record.go
new file mode 100644
index 000000000..ea6a0e7bd
--- /dev/null
+++ b/other/mq_client_example/example/my_record.go
@@ -0,0 +1,56 @@
+package example
+
+import (
+	"github.com/seaweedfs/seaweedfs/weed/mq/schema"
+	"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
+)
+
+type MyRecord struct {
+	Key    []byte
+	Field1 []byte
+	Field2 string
+	Field3 int32
+	Field4 int64
+	Field5 float32
+	Field6 float64
+	Field7 bool
+}
+
+func MyRecordType() *schema_pb.RecordType {
+	return schema.RecordTypeBegin().
+		WithField("key", schema.TypeBytes).
+		WithField("field1", schema.TypeBytes).
+		WithField("field2", schema.TypeString).
+		WithField("field3", schema.TypeInt32).
+		WithField("field4", schema.TypeInt64).
+		WithField("field5", schema.TypeFloat).
+		WithField("field6", schema.TypeDouble).
+		WithField("field7", schema.TypeBoolean).
+		RecordTypeEnd()
+}
+
+func (r *MyRecord) ToRecordValue() *schema_pb.RecordValue {
+	return schema.RecordBegin().
+		SetBytes("key", r.Key).
+		SetBytes("field1", r.Field1).
+		SetString("field2", r.Field2).
+		SetInt32("field3", r.Field3).
+		SetInt64("field4", r.Field4).
+		SetFloat("field5", r.Field5).
+		SetDouble("field6", r.Field6).
+		SetBool("field7", r.Field7).
+		RecordEnd()
+}
+
+func FromRecordValue(recordValue *schema_pb.RecordValue) *MyRecord {
+	return &MyRecord{
+		Key:    recordValue.Fields["key"].GetBytesValue(),
+		Field1: recordValue.Fields["field1"].GetBytesValue(),
+		Field2: recordValue.Fields["field2"].GetStringValue(),
+		Field3: recordValue.Fields["field3"].GetInt32Value(),
+		Field4: recordValue.Fields["field4"].GetInt64Value(),
+		Field5: recordValue.Fields["field5"].GetFloatValue(),
+		Field6: recordValue.Fields["field6"].GetDoubleValue(),
+		Field7: recordValue.Fields["field7"].GetBoolValue(),
+	}
+}