92 lines
1.6 KiB
Go
92 lines
1.6 KiB
Go
package common
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type Config interface {
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Name() string
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Starter() StartFct
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Children() []Config
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Add(Config)
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}
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type Services map[string]Context
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type ContextState interface{}
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type Context interface {
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Config() Config
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Parent() Context
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Services() Services
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ChildContext(Config) Context
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State() ContextState
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WithState(ContextState) Context
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}
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type StartFct = func(Context)
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// Context implementation
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type context struct {
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cfg Config
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parent Context
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children []Context
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state ContextState
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}
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func (ctx *context) Config() Config {
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return ctx.cfg
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}
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func (ctx *context) Parent() Context {
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return ctx.parent
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}
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func (ctx *context) Services() Services {
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return ctx.parent.Services()
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}
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func (ctx *context) ChildContext(cfg Config) Context {
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cctx := makeCtx(cfg, ctx)
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ctx.Services()[cfg.Name()] = cctx
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ctx.children = append(ctx.children, cctx)
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return cctx
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}
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func (ctx *context) State() ContextState {
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return ctx.state
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}
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func (ctx *context) WithState(state ContextState) Context {
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ctx.state = state
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return ctx
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}
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func makeCtx(cfg Config, parent Context) *context {
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return &context{
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cfg: cfg,
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parent: parent,
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}
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}
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// top-level application context
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type appContext struct {
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*context
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services Services
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}
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func (ctx *appContext) ChildContext(cfg Config) Context {
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cctx := makeCtx(cfg, ctx)
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ctx.services[cfg.Name()] = cctx
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ctx.children = append(ctx.children, cctx)
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return cctx
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}
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func (ctx *appContext) Services() Services {
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return ctx.services
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}
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func AppContext(cfg Config) Context {
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return &appContext{
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context: makeCtx(cfg, nil),
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services: Services{},
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}
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}
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