Add fabric peer session manager

agents/rap-node-agent/internal/mesh/fabric_session_manager.go

@@ -0,0 +1,105 @@
+package mesh
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"sync"
+)
+
+type FabricSessionPeerManager struct {
+	mu       sync.Mutex
+	sessions map[string]*FabricSessionPump
+}
+
+type FabricSessionPeerTarget struct {
+	PeerID  string
+	BaseURL string
+	Options FabricSessionDialOptions
+	Pump    FabricSessionPumpOptions
+}
+
+func NewFabricSessionPeerManager() *FabricSessionPeerManager {
+	return &FabricSessionPeerManager{
+		sessions: map[string]*FabricSessionPump{},
+	}
+}
+
+func (m *FabricSessionPeerManager) Get(ctx context.Context, target FabricSessionPeerTarget) (*FabricSessionPump, error) {
+	if m == nil {
+		return nil, fmt.Errorf("fabric session peer manager is nil")
+	}
+	key, err := fabricSessionPeerKey(target)
+	if err != nil {
+		return nil, err
+	}
+	m.mu.Lock()
+	if pump := m.sessions[key]; pump != nil {
+		m.mu.Unlock()
+		return pump, nil
+	}
+	m.mu.Unlock()
+
+	session, _, err := NewClient(target.BaseURL).OpenFabricSession(ctx, target.Options)
+	if err != nil {
+		return nil, err
+	}
+	pump := session.StartPump(ctx, target.Pump)
+
+	m.mu.Lock()
+	if existing := m.sessions[key]; existing != nil {
+		m.mu.Unlock()
+		_ = pump.Close()
+		return existing, nil
+	}
+	if m.sessions == nil {
+		m.sessions = map[string]*FabricSessionPump{}
+	}
+	m.sessions[key] = pump
+	m.mu.Unlock()
+	return pump, nil
+}
+
+func (m *FabricSessionPeerManager) ClosePeer(target FabricSessionPeerTarget) error {
+	if m == nil {
+		return nil
+	}
+	key, err := fabricSessionPeerKey(target)
+	if err != nil {
+		return err
+	}
+	m.mu.Lock()
+	pump := m.sessions[key]
+	delete(m.sessions, key)
+	m.mu.Unlock()
+	if pump == nil {
+		return nil
+	}
+	return pump.Close()
+}
+
+func (m *FabricSessionPeerManager) Close() error {
+	if m == nil {
+		return nil
+	}
+	m.mu.Lock()
+	sessions := m.sessions
+	m.sessions = map[string]*FabricSessionPump{}
+	m.mu.Unlock()
+	var firstErr error
+	for _, pump := range sessions {
+		if err := pump.Close(); err != nil && firstErr == nil {
+			firstErr = err
+		}
+	}
+	return firstErr
+}
+
+func fabricSessionPeerKey(target FabricSessionPeerTarget) (string, error) {
+	peerID := strings.TrimSpace(target.PeerID)
+	baseURL := strings.TrimRight(strings.TrimSpace(target.BaseURL), "/")
+	if peerID == "" || baseURL == "" {
+		return "", fmt.Errorf("fabric session peer id and base url are required")
+	}
+	return peerID + "\x00" + baseURL, nil
+}