Fix the issue with message dispatcher and channels

Resolved a previous error where each subscription would create a new
channel with the fixed buffer size. This caused blocking when the
channel buffer was full, preventing the client from handling additional messages.

Now, there is a `subscriptions` struct that holds a queue for receiving
notifications, ensuring the notify function does not block.

1 files changed, 25 insertions, 24 deletions

diff --git a/jsonrpc/client/message_dispatcher_test.go b/jsonrpc/client/message_dispatcher_test.go
index a1fc1c6..4d7cc60 100644
--- a/jsonrpc/client/message_dispatcher_test.go
+++ b/jsonrpc/client/message_dispatcher_test.go
@@ -5,58 +5,61 @@ import (
 	"sync/atomic"
 	"testing"
 
+	"github.com/karyontech/karyon-go/jsonrpc/message"
 	"github.com/stretchr/testify/assert"
 )
 
 func TestDispatchToChannel(t *testing.T) {
-	messageDispatcher := newMessageDispatcher[int, int](10)
+	messageDispatcher := newMessageDispatcher()
 
-	chanKey := 1
-	rx := messageDispatcher.register(chanKey)
+	req1 := "1"
+	rx := messageDispatcher.register(req1)
 
-	chanKey2 := 2
-	rx2 := messageDispatcher.register(chanKey2)
+	req2 := "2"
+	rx2 := messageDispatcher.register(req2)
 
 	var wg sync.WaitGroup
 
 	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		for i := 0; i < 50; i++ {
-			err := messageDispatcher.dispatch(chanKey, i)
+			res := message.Response{ID: &req1}
+			err := messageDispatcher.dispatch(req1, res)
 			assert.Nil(t, err)
 		}
 
-		messageDispatcher.unregister(chanKey)
-		wg.Done()
+		messageDispatcher.unregister(req1)
 	}()
 
 	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		for i := 0; i < 50; i++ {
-			err := messageDispatcher.dispatch(chanKey2, i)
+			res := message.Response{ID: &req2}
+			err := messageDispatcher.dispatch(req2, res)
 			assert.Nil(t, err)
 		}
 
-		messageDispatcher.unregister(chanKey2)
-		wg.Done()
+		messageDispatcher.unregister(req2)
 	}()
 
 	var receivedItem atomic.Int32
 
 	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		for range rx {
 			receivedItem.Add(1)
 		}
-		wg.Done()
 	}()
 
 	wg.Add(1)
 	go func() {
+		defer wg.Done()
 		for range rx2 {
 			receivedItem.Add(1)
 		}
-		wg.Done()
 	}()
 
 	wg.Wait()
@@ -64,33 +67,31 @@ func TestDispatchToChannel(t *testing.T) {
 }
 
 func TestUnregisterChannel(t *testing.T) {
-	messageDispatcher := newMessageDispatcher[int, int](1)
+	messageDispatcher := newMessageDispatcher()
 
-	chanKey := 1
-	rx := messageDispatcher.register(chanKey)
+	req := "1"
+	rx := messageDispatcher.register(req)
 
-	messageDispatcher.unregister(chanKey)
-	assert.Equal(t, messageDispatcher.length(), 0, "channels should be empty")
+	messageDispatcher.unregister(req)
 
 	_, ok := <-rx
 	assert.False(t, ok, "chan closed")
 
-	err := messageDispatcher.dispatch(chanKey, 1)
+	err := messageDispatcher.dispatch(req, message.Response{ID: &req})
 	assert.NotNil(t, err)
 }
 
 func TestClearChannels(t *testing.T) {
-	messageDispatcher := newMessageDispatcher[int, int](1)
+	messageDispatcher := newMessageDispatcher()
 
-	chanKey := 1
-	rx := messageDispatcher.register(chanKey)
+	req := "1"
+	rx := messageDispatcher.register(req)
 
 	messageDispatcher.clear()
-	assert.Equal(t, messageDispatcher.length(), 0, "channels should be empty")
 
 	_, ok := <-rx
 	assert.False(t, ok, "chan closed")
 
-	err := messageDispatcher.dispatch(chanKey, 1)
+	err := messageDispatcher.dispatch(req, message.Response{ID: &req})
 	assert.NotNil(t, err)
 }