14baf866f6
* Refactor the SnapshotManager interface Lift snapshot management out of the engine by delegating it to the SnapshotManager implementation in pkg/backend. * Add a event interface for plugin loads and use that interface to record plugins in the snapshot * Remove dead code * Add comments to Events * Add a number of tests for SnapshotManager * CR feedback: use a successful bit on 'End' instead of having a separate 'Abort' API * CR feedback * CR feedback: register plugins one-at-a-time instead of the entire state at once
60 lines
1.7 KiB
Go
60 lines
1.7 KiB
Go
// Copyright 2016-2018, Pulumi Corporation. All rights reserved.
|
|
|
|
package plugin
|
|
|
|
import (
|
|
"context"
|
|
|
|
"github.com/opentracing/opentracing-go"
|
|
|
|
"github.com/pulumi/pulumi/pkg/diag"
|
|
"github.com/pulumi/pulumi/pkg/util/rpcutil"
|
|
)
|
|
|
|
// Context is used to group related operations together so that associated OS resources can be cached, shared, and
|
|
// reclaimed as appropriate.
|
|
type Context struct {
|
|
Diag diag.Sink // the diagnostics sink to use for messages.
|
|
Host Host // the host that can be used to fetch providers.
|
|
Pwd string // the working directory to spawn all plugins in.
|
|
|
|
tracingSpan opentracing.Span // the OpenTracing span to parent requests within.
|
|
}
|
|
|
|
// NewContext allocates a new context with a given sink and host. Note that the host is "owned" by this context from
|
|
// here forwards, such that when the context's resources are reclaimed, so too are the host's.
|
|
func NewContext(d diag.Sink, host Host, cfg ConfigSource, events Events,
|
|
pwd string, parentSpan opentracing.Span) (*Context, error) {
|
|
ctx := &Context{
|
|
Diag: d,
|
|
Host: host,
|
|
Pwd: pwd,
|
|
tracingSpan: parentSpan,
|
|
}
|
|
if host == nil {
|
|
h, err := NewDefaultHost(ctx, cfg, events)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ctx.Host = h
|
|
}
|
|
return ctx, nil
|
|
}
|
|
|
|
// Request allocates a request sub-context.
|
|
func (ctx *Context) Request() context.Context {
|
|
// TODO[pulumi/pulumi#143]: support cancellation.
|
|
return opentracing.ContextWithSpan(context.Background(), ctx.tracingSpan)
|
|
}
|
|
|
|
// Close reclaims all resources associated with this context.
|
|
func (ctx *Context) Close() error {
|
|
if ctx.tracingSpan != nil {
|
|
ctx.tracingSpan.Finish()
|
|
}
|
|
err := ctx.Host.Close()
|
|
if err != nil && !rpcutil.IsBenignCloseErr(err) {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|