mirror of
https://github.com/prometheus/prometheus.git
synced 2025-11-04 02:11:01 +01:00
64 lines
2.0 KiB
Go
64 lines
2.0 KiB
Go
// Copyright 2013 Prometheus Team
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package storage
|
|
|
|
// RecordDecoder decodes each key-value pair in the database. The protocol
|
|
// around it makes the assumption that the underlying implementation is
|
|
// concurrency safe.
|
|
type RecordDecoder interface {
|
|
DecodeKey(in interface{}) (out interface{}, err error)
|
|
DecodeValue(in interface{}) (out interface{}, err error)
|
|
}
|
|
|
|
// FilterResult describes the record matching and scanning behavior for the
|
|
// database.
|
|
type FilterResult int
|
|
|
|
const (
|
|
// Stop scanning the database.
|
|
STOP FilterResult = iota
|
|
// Skip this record but continue scanning.
|
|
SKIP
|
|
// Accept this record for the Operator.
|
|
ACCEPT
|
|
)
|
|
|
|
type OperatorErrorType int
|
|
|
|
type OperatorError struct {
|
|
error
|
|
Continuable bool
|
|
}
|
|
|
|
// Filter is responsible for controlling the behavior of the database scan
|
|
// process and determines the disposition of various records.
|
|
//
|
|
// The protocol around it makes the assumption that the underlying
|
|
// implementation is concurrency safe.
|
|
type RecordFilter interface {
|
|
// Filter receives the key and value as decoded from the RecordDecoder type.
|
|
Filter(key, value interface{}) (filterResult FilterResult)
|
|
}
|
|
|
|
// RecordOperator is responsible for taking action upon each entity that is
|
|
// passed to it.
|
|
//
|
|
// The protocol around it makes the assumption that the underlying
|
|
// implementation is concurrency safe.
|
|
type RecordOperator interface {
|
|
// Take action on a given record. If the action returns an error, the entire
|
|
// scan process stops.
|
|
Operate(key, value interface{}) (err *OperatorError)
|
|
}
|