github.com/matrixorigin/matrixone@v1.2.0/pkg/queryservice/session_manager.go (about)

     1  // Copyright 2021 - 2023 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package queryservice
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/pb/status"
    19  	"sync"
    20  )
    21  
    22  // Session is an interface which should have the following methods.
    23  type Session interface {
    24  	// GetUUIDString returns the id of the session.
    25  	GetUUIDString() string
    26  	// GetTenantName returns the tenant name of the session.
    27  	GetTenantName() string
    28  	// StatusSession converts the session to status.Session.
    29  	StatusSession() *status.Session
    30  	// SetSessionRoutineStatus set the session Status
    31  	SetSessionRoutineStatus(status string) error
    32  }
    33  
    34  // SessionManager manages all sessions locally.
    35  type SessionManager struct {
    36  	mu struct {
    37  		sync.RWMutex
    38  		sessionsByID map[string]Session
    39  		// Tenant name => []*Session
    40  		sessionsByTenant map[string]map[Session]struct{}
    41  	}
    42  }
    43  
    44  // NewSessionManager creates a new SessionManager instance.
    45  func NewSessionManager() *SessionManager {
    46  	m := &SessionManager{}
    47  	m.mu.sessionsByID = make(map[string]Session)
    48  	m.mu.sessionsByTenant = make(map[string]map[Session]struct{})
    49  	return m
    50  }
    51  
    52  // AddSession adds a new session to manager.
    53  func (sm *SessionManager) AddSession(s Session) {
    54  	if sm == nil {
    55  		return
    56  	}
    57  	sm.mu.Lock()
    58  	defer sm.mu.Unlock()
    59  	sm.mu.sessionsByID[s.GetUUIDString()] = s
    60  	_, ok := sm.mu.sessionsByTenant[s.GetTenantName()]
    61  	if !ok {
    62  		sm.mu.sessionsByTenant[s.GetTenantName()] = make(map[Session]struct{})
    63  	}
    64  	sm.mu.sessionsByTenant[s.GetTenantName()][s] = struct{}{}
    65  }
    66  
    67  // RemoveSession removes a session from manager.
    68  func (sm *SessionManager) RemoveSession(s Session) {
    69  	if sm == nil {
    70  		return
    71  	}
    72  	sm.mu.Lock()
    73  	defer sm.mu.Unlock()
    74  	delete(sm.mu.sessionsByID, s.GetUUIDString())
    75  	delete(sm.mu.sessionsByTenant[s.GetTenantName()], s)
    76  }
    77  
    78  // GetAllSessions returns all sessions in the manager.
    79  func (sm *SessionManager) GetAllSessions() []Session {
    80  	if sm == nil {
    81  		return nil
    82  	}
    83  	sm.mu.RLock()
    84  	defer sm.mu.RUnlock()
    85  	sessions := make([]Session, 0, len(sm.mu.sessionsByID))
    86  	for _, session := range sm.mu.sessionsByID {
    87  		sessions = append(sessions, session)
    88  	}
    89  	return sessions
    90  }
    91  
    92  // GetAllStatusSessions returns all status sessions in the manager.
    93  func (sm *SessionManager) GetAllStatusSessions() []*status.Session {
    94  	if sm == nil {
    95  		return []*status.Session{}
    96  	}
    97  	sm.mu.RLock()
    98  	defer sm.mu.RUnlock()
    99  	sessions := make([]*status.Session, 0, len(sm.mu.sessionsByID))
   100  	for _, session := range sm.mu.sessionsByID {
   101  		sessions = append(sessions, session.StatusSession())
   102  	}
   103  	return sessions
   104  }
   105  
   106  // GetSessionsByTenant returns the sessions belongs to the tenant.
   107  func (sm *SessionManager) GetSessionsByTenant(tenant string) []Session {
   108  	if sm == nil {
   109  		return nil
   110  	}
   111  	sm.mu.RLock()
   112  	defer sm.mu.RUnlock()
   113  	sessions := make([]Session, 0, len(sm.mu.sessionsByTenant[tenant]))
   114  	for session := range sm.mu.sessionsByTenant[tenant] {
   115  		sessions = append(sessions, session)
   116  	}
   117  	return sessions
   118  }
   119  
   120  // GetStatusSessionsByTenant returns the status sessions belongs to the tenant.
   121  func (sm *SessionManager) GetStatusSessionsByTenant(tenant string) []*status.Session {
   122  	if sm == nil {
   123  		return []*status.Session{}
   124  	}
   125  	sm.mu.RLock()
   126  	defer sm.mu.RUnlock()
   127  	sessions := make([]*status.Session, 0, len(sm.mu.sessionsByTenant[tenant]))
   128  	for session := range sm.mu.sessionsByTenant[tenant] {
   129  		sessions = append(sessions, session.StatusSession())
   130  	}
   131  	return sessions
   132  }