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options.go
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options.go
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/*
* Copyright 2020 National Library of Norway.
*
* 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 diskbuffer
// browserControllerOptions configure the BrowserController. browserControllerOptions are set by the BrowserControllerOption
// values passed to New.
type options struct {
maxMemBytes int64
maxTotalBytes int64
memBufferSizeHint int64
tmpDir string
readOnly bool
}
// BrowserControllerOption configures BrowserController.
type Option interface {
apply(*options)
}
// funcBrowserControllerOption wraps a function that modifies browserControllerOptions into an
// implementation of the BrowserControllerOption interface.
type funcOption struct {
f func(*options)
}
func (fco *funcOption) apply(po *options) {
fco.f(po)
}
func newFuncOption(f func(*options)) *funcOption {
return &funcOption{
f: f,
}
}
func defaultOptions() options {
return options{
maxMemBytes: 1024 * 1024, // 1 MB
maxTotalBytes: 0, // No limit
tmpDir: "", // Use OS default
memBufferSizeHint: 1024 * 16,
}
}
func WithMaxMemBytes(size int64) Option {
return newFuncOption(func(o *options) {
o.maxMemBytes = size
})
}
func WithMemBufferSizeHint(size int64) Option {
return newFuncOption(func(o *options) {
o.memBufferSizeHint = size
})
}
func WithMaxTotalBytes(size int64) Option {
return newFuncOption(func(o *options) {
o.maxTotalBytes = size
})
}
func WithTmpDir(dir string) Option {
return newFuncOption(func(o *options) {
o.tmpDir = dir
})
}