github.com/mysteriumnetwork/node@v0.0.0-20240516044423-365054f76801/session/pingpong/consumer_balance_syncer.go (about)

     1  /*
     2   * Copyright (C) 2021 The "MysteriumNetwork/node" Authors.
     3   *
     4   * This program is free software: you can redistribute it and/or modify
     5   * it under the terms of the GNU General Public License as published by
     6   * the Free Software Foundation, either version 3 of the License, or
     7   * (at your option) any later version.
     8   *
     9   * This program is distributed in the hope that it will be useful,
    10   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    11   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    12   * GNU General Public License for more details.
    13   *
    14   * You should have received a copy of the GNU General Public License
    15   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
    16   */
    17  
    18  package pingpong
    19  
    20  import (
    21  	"sync"
    22  	"time"
    23  )
    24  
    25  type balanceSyncer struct {
    26  	jobs map[string]*job
    27  	lock sync.Mutex
    28  }
    29  
    30  func newBalanceSyncer() *balanceSyncer {
    31  	return &balanceSyncer{
    32  		jobs: make(map[string]*job),
    33  	}
    34  }
    35  
    36  // PeriodiclySyncBalance takes in the given job key, check if the job is already running. If so, it restarts the job to extend its lifetime. Otherwise it creates a new job and starts it.
    37  func (bs *balanceSyncer) PeriodiclySyncBalance(jobKey string, toRun func(stop <-chan struct{}), timeout time.Duration) (*job, bool) {
    38  	bs.lock.Lock()
    39  	defer bs.lock.Unlock()
    40  
    41  	if v, ok := bs.jobs[jobKey]; ok {
    42  		v = v.Restart()
    43  		bs.jobs[jobKey] = v
    44  		return v, true
    45  	}
    46  
    47  	j := newJob(toRun, timeout).Start()
    48  	bs.jobs[jobKey] = j
    49  	return j, false
    50  }