/
options.go
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/
options.go
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// Copyright 2019 Aporeto Inc.
// 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 manipvortex
import (
"time"
"go.aporeto.io/manipulate"
)
type config struct {
upstreamManipulator manipulate.Manipulator
upstreamSubscriber manipulate.Subscriber
logfile string
enableLog bool
transactionQueue chan *Transaction
readConsistency manipulate.ReadConsistency
writeConsistency manipulate.WriteConsistency
defaultQueueDuration time.Duration
defaultPageSize int
prefetcher Prefetcher
upstreamReconciler Reconciler
downstreamReconciler Reconciler
}
func newConfig() *config {
return &config{
transactionQueue: make(chan *Transaction, 1000),
readConsistency: manipulate.ReadConsistencyEventual,
writeConsistency: manipulate.WriteConsistencyStrong,
defaultQueueDuration: time.Second,
defaultPageSize: 10000,
prefetcher: NewDefaultPrefetcher(),
}
}
// Option represents an option can can be passed to NewContext.
type Option func(*config)
// OptionDefaultConsistency sets the default read and write consistency.
func OptionDefaultConsistency(read manipulate.ReadConsistency, write manipulate.WriteConsistency) Option {
return func(cfg *config) {
if read != manipulate.ReadConsistencyDefault {
cfg.readConsistency = read
}
if write != manipulate.WriteConsistencyDefault {
cfg.writeConsistency = write
}
}
}
// OptionUpstreamManipulator sets the upstream manipulator.
func OptionUpstreamManipulator(manipulator manipulate.Manipulator) Option {
return func(cfg *config) {
cfg.upstreamManipulator = manipulator
}
}
// OptionUpstreamSubscriber sets the upstream subscriber.
// Note the given subscriber must NOT be started or the events
// will be received twice, needlessly loading the VortexDB.
func OptionUpstreamSubscriber(s manipulate.Subscriber) Option {
return func(cfg *config) {
cfg.upstreamSubscriber = s
}
}
// OptionTransactionLog sets the transaction log file.
func OptionTransactionLog(filename string) Option {
return func(cfg *config) {
cfg.logfile = filename
cfg.enableLog = filename != ""
}
}
// OptionTransactionQueueLength sets the queue length of the
// transaction queue.
func OptionTransactionQueueLength(n int) Option {
return func(cfg *config) {
cfg.transactionQueue = make(chan *Transaction, n)
}
}
// OptionTransactionQueueDuration sets the default queue transaction
// duration. Once expired, the transaction is discarded.
func OptionTransactionQueueDuration(d time.Duration) Option {
return func(cfg *config) {
cfg.defaultQueueDuration = d
}
}
// OptionDefaultPageSize is the page size during fetching.
func OptionDefaultPageSize(defaultPageSize int) Option {
return func(cfg *config) {
cfg.defaultPageSize = defaultPageSize
}
}
// OptionPrefetcher sets the Prefetcher to use.
func OptionPrefetcher(p Prefetcher) Option {
return func(cfg *config) {
cfg.prefetcher = p
}
}
// OptionDownstreamReconciler sets the global downstream Reconcilers to use.
func OptionDownstreamReconciler(r Reconciler) Option {
return func(cfg *config) {
cfg.downstreamReconciler = r
}
}
// OptionUpstreamReconciler sets the global upstream Reconcilers to use.
func OptionUpstreamReconciler(r Reconciler) Option {
return func(cfg *config) {
cfg.upstreamReconciler = r
}
}