111 lines
2.4 KiB
Go
111 lines
2.4 KiB
Go
package core
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import (
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"context"
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"sync"
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"github.com/hashicorp/go-hclog"
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"github.com/hashicorp/go-multierror"
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plg "github.com/hashicorp/go-plugin"
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sdkcore "github.com/hashicorp/vagrant-plugin-sdk/core"
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"github.com/hashicorp/vagrant-plugin-sdk/internal-shared/protomappers"
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"google.golang.org/protobuf/encoding/protojson"
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)
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type CoreManager struct {
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closers []func() error // List of functions to execute on close
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ctx context.Context
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logger hclog.Logger // Logger for the manager
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m sync.Mutex
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srv []byte // Marshalled proto message for plugin manager
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}
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func (m *CoreManager) closer(f func() error) {
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m.closers = append(m.closers, f)
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}
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// Interface for plugins which allow broker access
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type Closer interface {
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Close() error
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}
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func (m *CoreManager) generatePlugin(fn func() (plg interface{})) (plg interface{}, err error) {
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plg = fn()
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if p, ok := plg.(Closer); ok {
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m.closer(func() error {
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return p.Close()
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})
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}
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return plg, nil
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}
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// Get a fresh instance of a core plugin
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func (m *CoreManager) GetPlugin(pluginType sdkcore.Type) (plg interface{}, err error) {
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switch pluginType {
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case sdkcore.BoxCollectionType:
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return m.generatePlugin(func() (plg interface{}) {
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return &BoxCollection{}
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})
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case sdkcore.BoxMetadataType:
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return m.generatePlugin(func() (plg interface{}) {
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return &BoxMetadata{}
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})
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case sdkcore.BoxType:
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return m.generatePlugin(func() (plg interface{}) {
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return &Box{}
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})
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case sdkcore.StateBagType:
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return m.generatePlugin(func() (plg interface{}) {
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return NewStateBag()
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})
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}
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return
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}
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func (m *CoreManager) Servinfo(broker *plg.GRPCBroker) ([]byte, error) {
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if m.srv != nil {
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return m.srv, nil
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}
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p, closer, err := protomappers.CorePluginManagerProtoDirect(m, m.logger, broker)
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if err != nil {
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m.logger.Warn("failed to create plugin manager grpc server",
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"error", err,
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)
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return nil, err
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}
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fn := func() error {
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m.logger.Info("closing the GRPC server instance")
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closer()
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m.srv = nil
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return nil
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}
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m.closer(fn)
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m.logger.Info("new GRPC server instance started",
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"address", p.Addr,
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)
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m.srv, err = protojson.Marshal(p)
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return m.srv, err
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}
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// Close the manager (and all managed plugins)
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func (m *CoreManager) Close() (err error) {
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m.m.Lock()
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defer m.m.Unlock()
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m.logger.Warn("closing the plugin manager")
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for _, c := range m.closers {
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if e := c(); err != nil {
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err = multierror.Append(err, e)
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}
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}
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return
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}
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var _ sdkcore.CorePluginManager = (*CoreManager)(nil)
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