118 lines
3.6 KiB
Go
118 lines
3.6 KiB
Go
package wisski
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import (
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"path/filepath"
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"reflect"
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"time"
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"github.com/FAU-CDI/wisski-distillery/internal/component"
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"github.com/FAU-CDI/wisski-distillery/internal/component/dis"
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"github.com/FAU-CDI/wisski-distillery/internal/component/instances"
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"github.com/FAU-CDI/wisski-distillery/internal/component/sql"
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"github.com/FAU-CDI/wisski-distillery/internal/component/ssh"
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"github.com/FAU-CDI/wisski-distillery/internal/component/triplestore"
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"github.com/FAU-CDI/wisski-distillery/internal/component/web"
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"github.com/FAU-CDI/wisski-distillery/internal/core"
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"github.com/FAU-CDI/wisski-distillery/pkg/lazy"
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)
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// components holds the various components of the distillery
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// It is inlined into the [Distillery] struct, and initialized using [makeComponent].
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//
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// The caller is responsible for syncronizing access across multiple goroutines.
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type components struct {
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// installable components
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web lazy.Lazy[*web.Web]
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dis lazy.Lazy[*dis.Dis]
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ssh lazy.Lazy[*ssh.SSH]
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ts lazy.Lazy[*triplestore.Triplestore]
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sql lazy.Lazy[*sql.SQL]
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// other components
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instances lazy.Lazy[*instances.Instances]
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}
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// makeComponent makes or returns a component inside the [component] struct of the distillery
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//
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// C is the type of component to initialize. It must be backed by a pointer, or makeComponent will panic.
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//
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// dis is the distillery to initialize components for
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// field is a pointer to the appropriate struct field within the distillery components
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// init is called with a new non-nil component to initialize it. It may be nil, to indicate no initialization is required.
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//
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// makeComponent returns the new or existing component instance
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func makeComponent[C component.Component](dis *Distillery, field *lazy.Lazy[C], init func(C)) C {
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// get the typeof C and make sure that it is a pointer type!
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typC := reflect.TypeOf((*C)(nil)).Elem()
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if typC.Kind() != reflect.Pointer {
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panic("makeComponent: C must be backed by a pointer")
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}
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// return the field
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return field.Get(func() (c C) {
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c = reflect.New(typC.Elem()).Interface().(C)
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if init != nil {
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init(c)
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}
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base := c.Base()
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base.Config = dis.Config
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if base.Dir == "" {
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base.Dir = filepath.Join(dis.Config.DeployRoot, "core", c.Name())
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}
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return
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})
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}
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// Components returns all components that have a stack function
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func (dis *Distillery) Components() []component.InstallableComponent {
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return []component.InstallableComponent{
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dis.Web(),
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dis.Dis(),
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dis.SSH(),
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dis.Triplestore(),
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dis.SQL(),
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}
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}
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func (dis *Distillery) Web() *web.Web {
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return makeComponent(dis, &dis.components.web, nil)
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}
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func (d *Distillery) Dis() *dis.Dis {
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return makeComponent(d, &d.components.dis, func(ddis *dis.Dis) {
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ddis.ResolverFile = core.PrefixConfig
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ddis.Instances = d.Instances()
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})
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}
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func (dis *Distillery) SSH() *ssh.SSH {
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return makeComponent(dis, &dis.components.ssh, nil)
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}
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func (dis *Distillery) SQL() *sql.SQL {
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return makeComponent(dis, &dis.components.sql, func(sql *sql.SQL) {
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sql.ServerURL = dis.Upstream.SQL
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sql.PollContext = dis.Context()
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sql.PollInterval = time.Second
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})
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}
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func (dis *Distillery) Triplestore() *triplestore.Triplestore {
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return makeComponent(dis, &dis.components.ts, func(ts *triplestore.Triplestore) {
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ts.BaseURL = "http://" + dis.Upstream.Triplestore
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ts.PollContext = dis.Context()
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ts.PollInterval = time.Second
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})
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}
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func (dis *Distillery) Instances() *instances.Instances {
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return makeComponent(dis, &dis.components.instances, func(instances *instances.Instances) {
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instances.Dir = filepath.Join(dis.Config.DeployRoot, "instances")
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instances.SQL = dis.SQL()
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instances.TS = dis.Triplestore()
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})
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}
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