73 lines
2.2 KiB
Go
73 lines
2.2 KiB
Go
// Copyright 2016-2018, Pulumi Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package plugin
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import (
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"context"
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"github.com/opentracing/opentracing-go"
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"github.com/pulumi/pulumi/pkg/diag"
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"github.com/pulumi/pulumi/pkg/util/rpcutil"
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)
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// Context is used to group related operations together so that associated OS resources can be cached, shared, and
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// reclaimed as appropriate.
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type Context struct {
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Diag diag.Sink // the diagnostics sink to use for messages.
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Host Host // the host that can be used to fetch providers.
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Pwd string // the working directory to spawn all plugins in.
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tracingSpan opentracing.Span // the OpenTracing span to parent requests within.
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}
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// NewContext allocates a new context with a given sink and host. Note that the host is "owned" by this context from
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// here forwards, such that when the context's resources are reclaimed, so too are the host's.
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func NewContext(d diag.Sink, host Host, cfg ConfigSource, events Events,
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pwd string, parentSpan opentracing.Span) (*Context, error) {
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ctx := &Context{
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Diag: d,
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Host: host,
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Pwd: pwd,
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tracingSpan: parentSpan,
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}
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if host == nil {
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h, err := NewDefaultHost(ctx, cfg, events)
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if err != nil {
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return nil, err
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}
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ctx.Host = h
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}
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return ctx, nil
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}
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// Request allocates a request sub-context.
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func (ctx *Context) Request() context.Context {
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// TODO[pulumi/pulumi#143]: support cancellation.
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return opentracing.ContextWithSpan(context.Background(), ctx.tracingSpan)
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}
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// Close reclaims all resources associated with this context.
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func (ctx *Context) Close() error {
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if ctx.tracingSpan != nil {
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ctx.tracingSpan.Finish()
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}
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err := ctx.Host.Close()
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if err != nil && !rpcutil.IsBenignCloseErr(err) {
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return err
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}
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return nil
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}
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