policy

package
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 Go to latest Published: Mar 7, 2024 License: MIT Imports: 11 Imported by: 0

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Overview

Package policy provides utilities for the union implementation.

Index

Constants

This section is empty.

Variables

This section is empty.

Functions

This section is empty.

Types

type All 

type All struct {
	EpAll
}

All policy behaves the same as EpAll except for the CREATE category Action category: same as epall. Create category: apply to all branches. Search category: same as epall.

func (*All) Create 

func (p *All) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*All) CreateEntries 

func (p *All) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

type EpAll 

type EpAll struct {
	EpFF
}

EpAll stands for existing path, all Action category: apply to all found. Create category: apply to all found. Search category: same as epff.

func (*EpAll) Action 

func (p *EpAll) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpAll) ActionEntries 

func (p *EpAll) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpAll) Create 

func (p *EpAll) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpAll) CreateEntries 

func (p *EpAll) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

type EpFF 

type EpFF struct{}

EpFF stands for existing path, first found Given the order of the candidates, act on the first one found where the relative path exists.

func (*EpFF) Action 

func (p *EpFF) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpFF) ActionEntries 

func (p *EpFF) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpFF) Create 

func (p *EpFF) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpFF) CreateEntries 

func (p *EpFF) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpFF) Search 

func (p *EpFF) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpFF) SearchEntries 

func (p *EpFF) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type EpLfs 

type EpLfs struct {
	EpAll
}

EpLfs stands for existing path, least free space Of all the candidates on which the path exists choose the one with the least free space.

func (*EpLfs) Action 

func (p *EpLfs) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpLfs) ActionEntries 

func (p *EpLfs) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpLfs) Create 

func (p *EpLfs) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpLfs) CreateEntries 

func (p *EpLfs) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpLfs) Search 

func (p *EpLfs) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpLfs) SearchEntries 

func (p *EpLfs) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type EpLno 

type EpLno struct {
	EpAll
}

EpLno stands for existing path, least number of objects Of all the candidates on which the path exists choose the one with the least number of objects

func (*EpLno) Action 

func (p *EpLno) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpLno) ActionEntries 

func (p *EpLno) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpLno) Create 

func (p *EpLno) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpLno) CreateEntries 

func (p *EpLno) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpLno) Search 

func (p *EpLno) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpLno) SearchEntries 

func (p *EpLno) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type EpLus 

type EpLus struct {
	EpAll
}

EpLus stands for existing path, least used space Of all the candidates on which the path exists choose the one with the least used space.

func (*EpLus) Action 

func (p *EpLus) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpLus) ActionEntries 

func (p *EpLus) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpLus) Create 

func (p *EpLus) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpLus) CreateEntries 

func (p *EpLus) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpLus) Search 

func (p *EpLus) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpLus) SearchEntries 

func (p *EpLus) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type EpMfs 

type EpMfs struct {
	EpAll
}

EpMfs stands for existing path, most free space Of all the candidates on which the path exists choose the one with the most free space.

func (*EpMfs) Action 

func (p *EpMfs) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpMfs) ActionEntries 

func (p *EpMfs) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpMfs) Create 

func (p *EpMfs) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpMfs) CreateEntries 

func (p *EpMfs) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpMfs) Search 

func (p *EpMfs) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpMfs) SearchEntries 

func (p *EpMfs) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type EpRand 

type EpRand struct {
	EpAll
}

EpRand stands for existing path, random Calls epall and then randomizes. Returns one candidate.

func (*EpRand) Action 

func (p *EpRand) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*EpRand) ActionEntries 

func (p *EpRand) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*EpRand) Create 

func (p *EpRand) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*EpRand) CreateEntries 

func (p *EpRand) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*EpRand) Search 

func (p *EpRand) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*EpRand) SearchEntries 

func (p *EpRand) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type FF 

type FF struct {
	EpFF
}

FF stands for first found Search category: same as epff. Action category: same as epff. Create category: Given the order of the candidates, act on the first one found.

func (*FF) Create 

func (p *FF) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

type Lfs 

type Lfs struct {
	EpLfs
}

Lfs stands for least free space Search category: same as eplfs. Action category: same as eplfs. Create category: Pick the drive with the least free space.

func (*Lfs) Create 

func (p *Lfs) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

type Lno 

type Lno struct {
	EpLno
}

Lno stands for least number of objects Search category: same as eplno. Action category: same as eplno. Create category: Pick the drive with the least number of objects.

func (*Lno) Create 

func (p *Lno) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

type Lus 

type Lus struct {
	EpLus
}

Lus stands for least used space Search category: same as eplus. Action category: same as eplus. Create category: Pick the drive with the least used space.

func (*Lus) Create 

func (p *Lus) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

type Mfs 

type Mfs struct {
	EpMfs
}

Mfs stands for most free space Search category: same as epmfs. Action category: same as epmfs. Create category: Pick the drive with the most free space.

func (*Mfs) Create 

func (p *Mfs) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

type Newest 

type Newest struct {
	EpAll
}

Newest policy picks the file / directory with the largest mtime It implies the existence of a path

func (*Newest) Action 

func (p *Newest) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*Newest) ActionEntries 

func (p *Newest) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*Newest) Create 

func (p *Newest) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*Newest) CreateEntries 

func (p *Newest) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*Newest) Search 

func (p *Newest) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*Newest) SearchEntries 

func (p *Newest) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

type Policy 

type Policy interface {
	// Action category policy, governing the modification of files and directories
	Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

	// Create category policy, governing the creation of files and directories
	Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

	// Search category policy, governing the access to files and directories
	Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

	// ActionEntries is ACTION category policy but receiving a set of candidate entries
	ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

	// CreateEntries is CREATE category policy but receiving a set of candidate entries
	CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

	// SearchEntries is SEARCH category policy but receiving a set of candidate entries
	SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)
}

Policy is the interface of a set of defined behavior choosing the upstream Fs to operate on

func Get 

func Get(name string) (Policy, error)

Get a Policy from the list

type Rand 

type Rand struct {
	All
}

Rand stands for random Calls all and then randomizes. Returns one candidate.

func (*Rand) Action 

func (p *Rand) Action(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Action category policy, governing the modification of files and directories

func (*Rand) ActionEntries 

func (p *Rand) ActionEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

ActionEntries is ACTION category policy but receiving a set of candidate entries

func (*Rand) Create 

func (p *Rand) Create(ctx context.Context, upstreams []*upstream.Fs, path string) ([]*upstream.Fs, error)

Create category policy, governing the creation of files and directories

func (*Rand) CreateEntries 

func (p *Rand) CreateEntries(entries ...upstream.Entry) ([]upstream.Entry, error)

CreateEntries is CREATE category policy but receiving a set of candidate entries

func (*Rand) Search 

func (p *Rand) Search(ctx context.Context, upstreams []*upstream.Fs, path string) (*upstream.Fs, error)

Search category policy, governing the access to files and directories

func (*Rand) SearchEntries 

func (p *Rand) SearchEntries(entries ...upstream.Entry) (upstream.Entry, error)

SearchEntries is SEARCH category policy but receiving a set of candidate entries

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