vitess.io/vitess@v0.16.2/go/vt/dbconnpool/pooled_connection.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package dbconnpool
    18  
    19  import (
    20  	"context"
    21  	"time"
    22  
    23  	"vitess.io/vitess/go/pools"
    24  )
    25  
    26  // PooledDBConnection re-exposes DBConnection to be used by ConnectionPool.
    27  type PooledDBConnection struct {
    28  	*DBConnection
    29  	timeCreated time.Time
    30  	pool        *ConnectionPool
    31  }
    32  
    33  func (pc *PooledDBConnection) Expired(lifetimeTimeout time.Duration) bool {
    34  	return lifetimeTimeout > 0 && time.Until(pc.timeCreated.Add(lifetimeTimeout)) < 0
    35  }
    36  
    37  func (pc *PooledDBConnection) ApplySetting(context.Context, *pools.Setting) error {
    38  	//TODO implement me
    39  	panic("implement me")
    40  }
    41  
    42  func (pc *PooledDBConnection) IsSettingApplied() bool {
    43  	return false
    44  }
    45  
    46  func (pc *PooledDBConnection) IsSameSetting(string) bool {
    47  	return true
    48  }
    49  
    50  func (pc *PooledDBConnection) ResetSetting(context.Context) error {
    51  	//TODO implement me
    52  	panic("implement me")
    53  }
    54  
    55  // Recycle should be called to return the PooledDBConnection to the pool.
    56  func (pc *PooledDBConnection) Recycle() {
    57  	if pc.IsClosed() {
    58  		pc.pool.Put(nil)
    59  	} else {
    60  		pc.pool.Put(pc)
    61  	}
    62  }
    63  
    64  // Reconnect replaces the existing underlying connection with a new one,
    65  // if possible. Recycle should still be called afterwards.
    66  func (pc *PooledDBConnection) Reconnect(ctx context.Context) error {
    67  	pc.DBConnection.Close()
    68  	newConn, err := NewDBConnection(ctx, pc.pool.info)
    69  	if err != nil {
    70  		return err
    71  	}
    72  	pc.DBConnection = newConn
    73  	return nil
    74  }