83 lines
2.2 KiB
Go
83 lines
2.2 KiB
Go
package depinject
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// Inject builds the container specified by containerConfig and extracts the
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// requested outputs from the container or returns an error. It is the single
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// entry point for building and running a dependency injection container.
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// Each of the values specified as outputs must be pointers to types that
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// can be provided by the container.
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//
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// Ex:
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//
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// var x int
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// Inject(Provide(func() int { return 1 }), &x)
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//
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// Inject uses the debug mode provided by AutoDebug which means there will be
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// verbose debugging information if there is an error and nothing upon success.
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// Use InjectDebug to configure debug behavior.
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func Inject(containerConfig Config, outputs ...interface{}) error {
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loc := LocationFromCaller(1)
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return inject(loc, AutoDebug(), containerConfig, outputs...)
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}
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// InjectDebug is a version of Inject which takes an optional DebugOption for
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// logging and visualization.
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func InjectDebug(debugOpt DebugOption, config Config, outputs ...interface{}) error {
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loc := LocationFromCaller(1)
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return inject(loc, debugOpt, config, outputs...)
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}
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func inject(loc Location, debugOpt DebugOption, config Config, outputs ...interface{}) error {
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cfg, err := newDebugConfig()
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if err != nil {
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return err
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}
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// always generate graph on exit
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defer cfg.generateGraph()
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// debug cleanup
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defer func() {
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for _, f := range cfg.cleanup {
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f()
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}
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}()
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if err = doInject(cfg, loc, debugOpt, config, outputs...); err != nil {
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cfg.logf("Error: %v", err)
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if cfg.onError != nil {
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if err2 := cfg.onError.applyConfig(cfg); err2 != nil {
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return err2
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}
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}
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return err
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}
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if cfg.onSuccess != nil {
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if err2 := cfg.onSuccess.applyConfig(cfg); err2 != nil {
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return err2
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}
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}
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return nil
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}
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func doInject(cfg *debugConfig, loc Location, debugOpt DebugOption, config Config, outputs ...interface{}) error {
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if debugOpt != nil {
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if err := debugOpt.applyConfig(cfg); err != nil {
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return err
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}
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}
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cfg.logf("Registering providers")
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cfg.indentLogger()
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ctr := newContainer(cfg)
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err := config.apply(ctr)
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if err != nil {
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cfg.logf("Failed registering providers because of: %+v", err)
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return err
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}
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cfg.dedentLogger()
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return ctr.build(loc, outputs...)
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}
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