mirror of https://github.com/go-gorm/gorm.git
Refactor callbacks
This commit is contained in:
Jinzhu
parent
e509b3100d
commit
5959c81be6
261
callbacks.go
261
callbacks.go
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@ -2,26 +2,36 @@ package gorm
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import (
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"fmt"
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"log"
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"github.com/jinzhu/gorm/logger"
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"github.com/jinzhu/gorm/utils"
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)
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// Callbacks gorm callbacks manager
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type Callbacks struct {
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creates []func(*DB)
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queries []func(*DB)
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updates []func(*DB)
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deletes []func(*DB)
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row []func(*DB)
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raw []func(*DB)
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db *DB
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processors []*processor
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func InitializeCallbacks() *callbacks {
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return &callbacks{
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processors: map[string]*processor{
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"create": &processor{},
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"query": &processor{},
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"update": &processor{},
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"delete": &processor{},
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"row": &processor{},
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"raw": &processor{},
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},
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}
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}
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// callbacks gorm callbacks manager
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type callbacks struct {
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processors map[string]*processor
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}
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type processor struct {
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kind string
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db *DB
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fns []func(*DB)
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callbacks []*callback
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}
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type callback struct {
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name string
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before string
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after string
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@ -29,79 +39,111 @@ type processor struct {
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replace bool
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match func(*DB) bool
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handler func(*DB)
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callbacks *Callbacks
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processor *processor
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}
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func (cs *Callbacks) Create() *processor {
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return &processor{callbacks: cs, kind: "create"}
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func (cs *callbacks) Create() *processor {
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return cs.processors["create"]
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}
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func (cs *Callbacks) Query() *processor {
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return &processor{callbacks: cs, kind: "query"}
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func (cs *callbacks) Query() *processor {
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return cs.processors["query"]
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}
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func (cs *Callbacks) Update() *processor {
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return &processor{callbacks: cs, kind: "update"}
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func (cs *callbacks) Update() *processor {
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return cs.processors["update"]
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}
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func (cs *Callbacks) Delete() *processor {
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return &processor{callbacks: cs, kind: "delete"}
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func (cs *callbacks) Delete() *processor {
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return cs.processors["delete"]
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}
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func (cs *Callbacks) Row() *processor {
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return &processor{callbacks: cs, kind: "row"}
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func (cs *callbacks) Row() *processor {
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return cs.processors["row"]
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}
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func (cs *Callbacks) Raw() *processor {
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return &processor{callbacks: cs, kind: "raw"}
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func (cs *callbacks) Raw() *processor {
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return cs.processors["raw"]
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}
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func (p *processor) Before(name string) *processor {
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p.before = name
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return p
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func (p *processor) Execute(db *DB) {
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for _, f := range p.fns {
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f(db)
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}
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func (p *processor) After(name string) *processor {
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p.after = name
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return p
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}
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func (p *processor) Match(fc func(*DB) bool) *processor {
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p.match = fc
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return p
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}
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func (p *processor) Get(name string) func(*DB) {
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for i := len(p.callbacks.processors) - 1; i >= 0; i-- {
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if v := p.callbacks.processors[i]; v.name == name && v.kind == v.kind && !v.remove {
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for i := len(p.callbacks) - 1; i >= 0; i-- {
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if v := p.callbacks[i]; v.name == name && !v.remove {
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return v.handler
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}
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}
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return nil
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}
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func (p *processor) Register(name string, fn func(*DB)) {
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p.name = name
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p.handler = fn
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p.callbacks.processors = append(p.callbacks.processors, p)
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p.callbacks.compile(p.callbacks.db)
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func (p *processor) Before(name string) *callback {
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return &callback{before: name, processor: p}
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}
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func (p *processor) Remove(name string) {
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logger.Default.Info("removing callback `%v` from %v\n", name, utils.FileWithLineNum())
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p.name = name
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p.remove = true
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p.callbacks.processors = append(p.callbacks.processors, p)
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p.callbacks.compile(p.callbacks.db)
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func (p *processor) After(name string) *callback {
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return &callback{after: name, processor: p}
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}
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func (p *processor) Replace(name string, fn func(*DB)) {
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logger.Default.Info("[info] replacing callback `%v` from %v\n", name, utils.FileWithLineNum())
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p.name = name
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p.handler = fn
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p.replace = true
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p.callbacks.processors = append(p.callbacks.processors, p)
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p.callbacks.compile(p.callbacks.db)
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func (p *processor) Match(fc func(*DB) bool) *callback {
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return &callback{match: fc, processor: p}
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}
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func (p *processor) Register(name string, fn func(*DB)) error {
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return (&callback{processor: p}).Register(name, fn)
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}
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func (p *processor) Remove(name string) error {
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return (&callback{processor: p}).Remove(name)
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}
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func (p *processor) Replace(name string, fn func(*DB)) error {
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return (&callback{processor: p}).Replace(name, fn)
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}
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func (p *processor) compile(db *DB) (err error) {
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if p.fns, err = sortCallbacks(p.callbacks); err != nil {
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logger.Default.Error("Got error when compile callbacks, got %v", err)
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}
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return
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}
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func (c *callback) Before(name string) *callback {
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c.before = name
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return c
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}
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func (c *callback) After(name string) *callback {
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c.after = name
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return c
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}
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func (c *callback) Register(name string, fn func(*DB)) error {
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c.name = name
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c.handler = fn
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c.processor.callbacks = append(c.processor.callbacks, c)
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return c.processor.compile(c.processor.db)
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}
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func (c *callback) Remove(name string) error {
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logger.Default.Warn("removing callback `%v` from %v\n", name, utils.FileWithLineNum())
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c.name = name
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c.remove = true
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c.processor.callbacks = append(c.processor.callbacks, c)
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return c.processor.compile(c.processor.db)
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}
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func (c *callback) Replace(name string, fn func(*DB)) error {
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logger.Default.Info("replacing callback `%v` from %v\n", name, utils.FileWithLineNum())
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c.name = name
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c.handler = fn
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c.replace = true
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c.processor.callbacks = append(c.processor.callbacks, c)
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return c.processor.compile(c.processor.db)
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}
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// getRIndex get right index from string slice
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@ -114,98 +156,81 @@ func getRIndex(strs []string, str string) int {
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return -1
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}
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func sortProcessors(ps []*processor) []func(*DB) {
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func sortCallbacks(cs []*callback) (fns []func(*DB), err error) {
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var (
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allNames, sortedNames []string
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sortProcessor func(*processor) error
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names, sorted []string
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sortCallback func(*callback) error
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)
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for _, p := range ps {
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for _, c := range cs {
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// show warning message the callback name already exists
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if idx := getRIndex(allNames, p.name); idx > -1 && !p.replace && !p.remove && !ps[idx].remove {
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log.Printf("[warning] duplicated callback `%v` from %v\n", p.name, utils.FileWithLineNum())
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if idx := getRIndex(names, c.name); idx > -1 && !c.replace && !c.remove && !cs[idx].remove {
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logger.Default.Warn("duplicated callback `%v` from %v\n", c.name, utils.FileWithLineNum())
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}
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allNames = append(allNames, p.name)
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names = append(names, c.name)
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}
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sortProcessor = func(p *processor) error {
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if getRIndex(sortedNames, p.name) == -1 { // if not sorted
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if p.before != "" { // if defined before callback
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if sortedIdx := getRIndex(sortedNames, p.before); sortedIdx != -1 {
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if curIdx := getRIndex(sortedNames, p.name); curIdx != -1 || true {
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sortCallback = func(c *callback) error {
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if c.before != "" { // if defined before callback
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if sortedIdx := getRIndex(sorted, c.before); sortedIdx != -1 {
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if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
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// if before callback already sorted, append current callback just after it
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sortedNames = append(sortedNames[:sortedIdx], append([]string{p.name}, sortedNames[sortedIdx:]...)...)
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sorted = append(sorted[:sortedIdx], append([]string{c.name}, sorted[sortedIdx:]...)...)
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} else if curIdx > sortedIdx {
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return fmt.Errorf("conflicting callback %v with before %v", p.name, p.before)
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return fmt.Errorf("conflicting callback %v with before %v", c.name, c.before)
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}
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} else if idx := getRIndex(allNames, p.before); idx != -1 {
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} else if idx := getRIndex(names, c.before); idx != -1 {
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// if before callback exists
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ps[idx].after = p.name
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cs[idx].after = c.name
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}
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}
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if p.after != "" { // if defined after callback
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if sortedIdx := getRIndex(sortedNames, p.after); sortedIdx != -1 {
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if c.after != "" { // if defined after callback
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if sortedIdx := getRIndex(sorted, c.after); sortedIdx != -1 {
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if curIdx := getRIndex(sorted, c.name); curIdx == -1 {
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// if after callback sorted, append current callback to last
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sortedNames = append(sortedNames, p.name)
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} else if idx := getRIndex(allNames, p.after); idx != -1 {
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sorted = append(sorted, c.name)
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} else if curIdx < sortedIdx {
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return fmt.Errorf("conflicting callback %v with before %v", c.name, c.after)
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}
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} else if idx := getRIndex(names, c.after); idx != -1 {
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// if after callback exists but haven't sorted
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// set after callback's before callback to current callback
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if after := ps[idx]; after.before == "" {
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after.before = p.name
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sortProcessor(after)
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after := cs[idx]
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if after.before == "" {
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after.before = c.name
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}
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if err := sortCallback(after); err != nil {
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return err
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}
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if err := sortCallback(c); err != nil {
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return err
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}
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}
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}
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// if current callback haven't been sorted, append it to last
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if getRIndex(sortedNames, p.name) == -1 {
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sortedNames = append(sortedNames, p.name)
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}
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if getRIndex(sorted, c.name) == -1 {
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sorted = append(sorted, c.name)
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}
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return nil
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}
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for _, p := range ps {
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sortProcessor(p)
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}
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var fns []func(*DB)
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for _, name := range sortedNames {
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if idx := getRIndex(allNames, name); !ps[idx].remove {
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fns = append(fns, ps[idx].handler)
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for _, c := range cs {
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if err = sortCallback(c); err != nil {
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return
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}
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}
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return fns
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}
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// compile processors
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func (cs *Callbacks) compile(db *DB) {
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processors := map[string][]*processor{}
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for _, p := range cs.processors {
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if p.name != "" {
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if p.match == nil || p.match(db) {
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processors[p.kind] = append(processors[p.kind], p)
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}
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for _, name := range sorted {
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if idx := getRIndex(names, name); !cs[idx].remove {
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fns = append(fns, cs[idx].handler)
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}
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}
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for name, ps := range processors {
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switch name {
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case "create":
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cs.creates = sortProcessors(ps)
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case "query":
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cs.queries = sortProcessors(ps)
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case "update":
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cs.updates = sortProcessors(ps)
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case "delete":
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cs.deletes = sortProcessors(ps)
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case "row":
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cs.row = sortProcessors(ps)
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case "raw":
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cs.raw = sortProcessors(ps)
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}
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}
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return
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}
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@ -1,131 +0,0 @@
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package gorm
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import (
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"fmt"
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"reflect"
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"runtime"
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"strings"
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"testing"
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)
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func assertCallbacks(funcs []func(*DB), fnames []string) (result bool, msg string) {
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var got []string
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for _, f := range funcs {
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got = append(got, getFuncName(f))
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}
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return fmt.Sprint(got) == fmt.Sprint(fnames), fmt.Sprintf("expects %v, got %v", fnames, got)
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}
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func getFuncName(fc func(*DB)) string {
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fnames := strings.Split(runtime.FuncForPC(reflect.ValueOf(fc).Pointer()).Name(), ".")
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return fnames[len(fnames)-1]
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}
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func c1(*DB) {}
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func c2(*DB) {}
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func c3(*DB) {}
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func c4(*DB) {}
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func c5(*DB) {}
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func TestCallbacks(t *testing.T) {
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type callback struct {
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name string
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before string
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after string
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remove bool
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replace bool
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err error
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match func(*DB) bool
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h func(*DB)
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}
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datas := []struct {
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callbacks []callback
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results []string
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}{
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{
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callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4}, {h: c5}},
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results: []string{"c1", "c2", "c3", "c4", "c5"},
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},
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{
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callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4}, {h: c5, before: "c4"}},
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results: []string{"c1", "c2", "c3", "c5", "c4"},
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},
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{
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callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4, after: "c5"}, {h: c5}},
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results: []string{"c1", "c2", "c3", "c5", "c4"},
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},
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{
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callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4, after: "c5"}, {h: c5, before: "c4"}},
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results: []string{"c1", "c2", "c3", "c5", "c4"},
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},
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{
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callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3}, {h: c4}, {h: c5}},
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results: []string{"c1", "c5", "c2", "c3", "c4"},
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},
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{
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callbacks: []callback{{h: c1, before: "c3", after: "c4"}, {h: c2, before: "c4", after: "c5"}, {h: c3, before: "c5"}, {h: c4}, {h: c5}},
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results: []string{"c1", "c3", "c5", "c2", "c4"},
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},
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{
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callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3}, {h: c4}, {h: c5}, {h: c2, remove: true}},
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results: []string{"c1", "c5", "c3", "c4"},
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},
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{
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callbacks: []callback{{h: c1}, {name: "c", h: c2}, {h: c3}, {name: "c", h: c4, replace: true}},
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results: []string{"c1", "c4", "c3"},
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},
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}
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// func TestRegisterCallbackWithComplexOrder(t *testing.T) {
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// var callback2 = &Callback{logger: defaultLogger}
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// callback2.Delete().Before("after_create1").After("before_create1").Register("create", create)
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// callback2.Delete().Before("create").Register("before_create1", beforeCreate1)
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// callback2.Delete().After("before_create1").Register("before_create2", beforeCreate2)
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// callback2.Delete().Register("after_create1", afterCreate1)
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// callback2.Delete().After("after_create1").Register("after_create2", afterCreate2)
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// if !equalFuncs(callback2.deletes, []string{"beforeCreate1", "beforeCreate2", "create", "afterCreate1", "afterCreate2"}) {
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// t.Errorf("register callback with order")
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// }
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// }
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for idx, data := range datas {
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callbacks := &Callbacks{}
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for _, c := range data.callbacks {
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p := callbacks.Create()
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if c.name == "" {
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c.name = getFuncName(c.h)
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}
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if c.before != "" {
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p = p.Before(c.before)
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}
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if c.after != "" {
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p = p.After(c.after)
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}
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if c.match != nil {
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p = p.Match(c.match)
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}
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||||
if c.remove {
|
||||
p.Remove(c.name)
|
||||
} else if c.replace {
|
||||
p.Replace(c.name, c.h)
|
||||
} else {
|
||||
p.Register(c.name, c.h)
|
||||
}
|
||||
}
|
||||
|
||||
if ok, msg := assertCallbacks(callbacks.creates, data.results); !ok {
|
||||
t.Errorf("callbacks tests #%v failed, got %v", idx+1, msg)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,158 @@
|
|||
package gorm_test
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"reflect"
|
||||
"runtime"
|
||||
"strings"
|
||||
"testing"
|
||||
|
||||
"github.com/jinzhu/gorm"
|
||||
)
|
||||
|
||||
func assertCallbacks(v interface{}, fnames []string) (result bool, msg string) {
|
||||
var (
|
||||
got []string
|
||||
funcs = reflect.ValueOf(v).Elem().FieldByName("fns")
|
||||
)
|
||||
|
||||
for i := 0; i < funcs.Len(); i++ {
|
||||
got = append(got, getFuncName(funcs.Index(i)))
|
||||
}
|
||||
|
||||
return fmt.Sprint(got) == fmt.Sprint(fnames), fmt.Sprintf("expects %v, got %v", fnames, got)
|
||||
}
|
||||
|
||||
func getFuncName(fc interface{}) string {
|
||||
reflectValue, ok := fc.(reflect.Value)
|
||||
if !ok {
|
||||
reflectValue = reflect.ValueOf(fc)
|
||||
}
|
||||
|
||||
fnames := strings.Split(runtime.FuncForPC(reflectValue.Pointer()).Name(), ".")
|
||||
return fnames[len(fnames)-1]
|
||||
}
|
||||
|
||||
func c1(*gorm.DB) {}
|
||||
func c2(*gorm.DB) {}
|
||||
func c3(*gorm.DB) {}
|
||||
func c4(*gorm.DB) {}
|
||||
func c5(*gorm.DB) {}
|
||||
|
||||
func TestCallbacks(t *testing.T) {
|
||||
type callback struct {
|
||||
name string
|
||||
before string
|
||||
after string
|
||||
remove bool
|
||||
replace bool
|
||||
err string
|
||||
match func(*gorm.DB) bool
|
||||
h func(*gorm.DB)
|
||||
}
|
||||
|
||||
datas := []struct {
|
||||
callbacks []callback
|
||||
err string
|
||||
results []string
|
||||
}{
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4}, {h: c5}},
|
||||
results: []string{"c1", "c2", "c3", "c4", "c5"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4}, {h: c5, before: "c4"}},
|
||||
results: []string{"c1", "c2", "c3", "c5", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4, after: "c5"}, {h: c5}},
|
||||
results: []string{"c1", "c2", "c3", "c5", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2}, {h: c3}, {h: c4, after: "c5"}, {h: c5, before: "c4"}},
|
||||
results: []string{"c1", "c2", "c3", "c5", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3}, {h: c4}, {h: c5}},
|
||||
results: []string{"c1", "c5", "c2", "c3", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1, after: "c3"}, {h: c2, before: "c4", after: "c5"}, {h: c3, before: "c5"}, {h: c4}, {h: c5}},
|
||||
results: []string{"c3", "c1", "c5", "c2", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1, before: "c4", after: "c3"}, {h: c2, before: "c4", after: "c5"}, {h: c3, before: "c5"}, {h: c4}, {h: c5}},
|
||||
results: []string{"c3", "c1", "c5", "c2", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1, before: "c3", after: "c4"}, {h: c2, before: "c4", after: "c5"}, {h: c3, before: "c5"}, {h: c4}, {h: c5}},
|
||||
err: "conflicting",
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {h: c2, before: "c4", after: "c5"}, {h: c3}, {h: c4}, {h: c5}, {h: c2, remove: true}},
|
||||
results: []string{"c1", "c5", "c3", "c4"},
|
||||
},
|
||||
{
|
||||
callbacks: []callback{{h: c1}, {name: "c", h: c2}, {h: c3}, {name: "c", h: c4, replace: true}},
|
||||
results: []string{"c1", "c4", "c3"},
|
||||
},
|
||||
}
|
||||
|
||||
for idx, data := range datas {
|
||||
var err error
|
||||
callbacks := gorm.InitializeCallbacks()
|
||||
|
||||
for _, c := range data.callbacks {
|
||||
var v interface{} = callbacks.Create()
|
||||
callMethod := func(s interface{}, name string, args ...interface{}) {
|
||||
var argValues []reflect.Value
|
||||
for _, arg := range args {
|
||||
argValues = append(argValues, reflect.ValueOf(arg))
|
||||
}
|
||||
|
||||
results := reflect.ValueOf(s).MethodByName(name).Call(argValues)
|
||||
if len(results) > 0 {
|
||||
v = results[0].Interface()
|
||||
}
|
||||
}
|
||||
|
||||
if c.name == "" {
|
||||
c.name = getFuncName(c.h)
|
||||
}
|
||||
|
||||
if c.before != "" {
|
||||
callMethod(v, "Before", c.before)
|
||||
}
|
||||
|
||||
if c.after != "" {
|
||||
callMethod(v, "After", c.after)
|
||||
}
|
||||
|
||||
if c.match != nil {
|
||||
callMethod(v, "Match", c.match)
|
||||
}
|
||||
|
||||
if c.remove {
|
||||
callMethod(v, "Remove", c.name)
|
||||
} else if c.replace {
|
||||
callMethod(v, "Replace", c.name, c.h)
|
||||
} else {
|
||||
callMethod(v, "Register", c.name, c.h)
|
||||
}
|
||||
|
||||
if e, ok := v.(error); !ok || e != nil {
|
||||
err = e
|
||||
}
|
||||
}
|
||||
|
||||
if len(data.err) > 0 && err == nil {
|
||||
t.Errorf("callbacks tests #%v should got error %v, but not", idx+1, data.err)
|
||||
} else if len(data.err) == 0 && err != nil {
|
||||
t.Errorf("callbacks tests #%v should not got error, but got %v", idx+1, err)
|
||||
}
|
||||
|
||||
if ok, msg := assertCallbacks(callbacks.Create(), data.results); !ok {
|
||||
t.Errorf("callbacks tests #%v failed, got %v", idx+1, msg)
|
||||
}
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue