github.com/insionng/yougam@v0.0.0-20170714101924-2bc18d833463/libraries/pingcap/tidb/store/tikv/mock-tikv/pd.go (about)

     1  // Copyright 2016 PingCAP, Inc.
     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  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package mocktikv
    15  
    16  import (
    17  	"sync"
    18  	"time"
    19  
    20  	"github.com/insionng/yougam/libraries/juju/errors"
    21  	"github.com/insionng/yougam/libraries/pingcap/kvproto/pkg/metapb"
    22  	"github.com/insionng/yougam/libraries/pingcap/pd/pd-client"
    23  )
    24  
    25  // Use global variables to prevent pdClients from creating duplicate timestamps.
    26  var (
    27  	tsMu       sync.Mutex
    28  	physicalTS int64
    29  	logicalTS  int64
    30  )
    31  
    32  type pdClient struct {
    33  	cluster *Cluster
    34  }
    35  
    36  // NewPDClient creates a mock pd.Client that uses local timestamp and meta data
    37  // from a Cluster.
    38  func NewPDClient(cluster *Cluster) pd.Client {
    39  	return &pdClient{
    40  		cluster: cluster,
    41  	}
    42  }
    43  
    44  func (c *pdClient) GetTS() (int64, int64, error) {
    45  	tsMu.Lock()
    46  	defer tsMu.Unlock()
    47  
    48  	ts := time.Now().UnixNano() / int64(time.Millisecond)
    49  	if physicalTS >= ts {
    50  		logicalTS++
    51  	} else {
    52  		physicalTS = ts
    53  		logicalTS = 0
    54  	}
    55  	return physicalTS, logicalTS, nil
    56  }
    57  
    58  func (c *pdClient) GetRegion(key []byte) (*metapb.Region, error) {
    59  	region := c.cluster.GetRegionByKey(key)
    60  	if region == nil {
    61  		return nil, errors.New("not found")
    62  	}
    63  	return region, nil
    64  }
    65  
    66  func (c *pdClient) GetStore(storeID uint64) (*metapb.Store, error) {
    67  	store := c.cluster.GetStore(storeID)
    68  	if store == nil {
    69  		return nil, errors.New("not found")
    70  	}
    71  	return store, nil
    72  }
    73  
    74  func (c *pdClient) Close() {
    75  }