46 lines
1.8 KiB
Go
46 lines
1.8 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 engine
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import (
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"io"
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"github.com/pulumi/pulumi/pkg/resource/deploy"
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)
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// SnapshotManager is responsible for maintaining the in-memory representation
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// of the current state of the resource world.
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type SnapshotManager interface {
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io.Closer
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// BeginMutation signals to the SnapshotManager that the planner intends to mutate the global
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// snapshot. It provides the step that it intends to execute. Based on that step, BeginMutation
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// will record this intent in the global snapshot and return a `SnapshotMutation` that, when ended,
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// will complete the transaction.
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BeginMutation(step deploy.Step) (SnapshotMutation, error)
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// RegisterResourceOutputs registers the set of resource outputs generated by performing the
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// given step. These outputs are persisted in the snapshot.
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RegisterResourceOutputs(step deploy.Step) error
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}
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// SnapshotMutation represents an outstanding mutation that is yet to be completed. When the engine completes
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// a mutation, it must call `End` in order to record the successful completion of the mutation.
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type SnapshotMutation interface {
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// End terminates the transaction and commits the results to the snapshot, returning an error if this
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// failed to complete.
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End(step deploy.Step, successful bool) error
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}
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