github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/libraries/doltcore/remotestorage/capacity_monitor.go (about)

     1  // Copyright 2019-2020 Dolthub, 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  // 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 remotestorage
    16  
    17  // CapacityMonitor returns true if a capacity is exceeded
    18  type CapacityMonitor interface {
    19  	CapacityExceeded(size int) bool
    20  }
    21  
    22  type uncapped struct{}
    23  
    24  var _ CapacityMonitor = &uncapped{}
    25  
    26  func (cap *uncapped) CapacityExceeded(size int) bool {
    27  	return false
    28  }
    29  
    30  func NewUncappedCapacityMonitor() *uncapped {
    31  	return &uncapped{}
    32  }
    33  
    34  type fixedCapacity struct {
    35  	capacity int64
    36  	currSize int64
    37  }
    38  
    39  var _ CapacityMonitor = &fixedCapacity{}
    40  
    41  func (cap *fixedCapacity) CapacityExceeded(size int) bool {
    42  	cap.currSize += int64(size)
    43  	return cap.currSize > cap.capacity
    44  }
    45  
    46  func NewFixedCapacityMonitor(maxCapacity int64) *fixedCapacity {
    47  	return &fixedCapacity{capacity: maxCapacity}
    48  }