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Viewing changes to src/github.com/juju/juju/worker/apiaddressupdater/manifold.go

  • Committer: Nicholas Skaggs
  • Date: 2016-10-24 20:56:05 UTC
  • Revision ID: nicholas.skaggs@canonical.com-20161024205605-z8lta0uvuhtxwzwl
Initi with beta15

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src/github.com/juju/juju/worker/apiaddressupdater/manifold.go
 
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// Copyright 2015 Canonical Ltd.
 
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// Licensed under the AGPLv3, see LICENCE file for details.
 
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package apiaddressupdater
 
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import (
 
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        "github.com/juju/errors"
 
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        "github.com/juju/juju/api/machiner"
 
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        "gopkg.in/juju/names.v2"
 
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        "github.com/juju/juju/agent"
 
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        "github.com/juju/juju/api/base"
 
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        "github.com/juju/juju/api/uniter"
 
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        "github.com/juju/juju/cmd/jujud/agent/engine"
 
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        "github.com/juju/juju/worker"
 
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        "github.com/juju/juju/worker/dependency"
 
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)
 
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// ManifoldConfig defines the names of the manifolds on which a Manifold will depend.
 
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type ManifoldConfig engine.AgentApiManifoldConfig
 
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// Manifold returns a dependency manifold that runs an API address updater worker,
 
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// using the resource names defined in the supplied config.
 
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func Manifold(config ManifoldConfig) dependency.Manifold {
 
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        typedConfig := engine.AgentApiManifoldConfig(config)
 
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        return engine.AgentApiManifold(typedConfig, newWorker)
 
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}
 
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// newWorker trivially wraps NewAPIAddressUpdater for use in a engine.AgentApiManifold.
 
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// It's not tested at the moment, because the scaffolding necessary is too
 
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// unwieldy/distracting to introduce at this point.
 
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var newWorker = func(a agent.Agent, apiCaller base.APICaller) (worker.Worker, error) {
 
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        tag := a.CurrentConfig().Tag()
 
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        // TODO(fwereade): use appropriate facade!
 
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        var facade APIAddresser
 
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        switch apiTag := tag.(type) {
 
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        case names.UnitTag:
 
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                facade = uniter.NewState(apiCaller, apiTag)
 
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        case names.MachineTag:
 
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                facade = machiner.NewState(apiCaller)
 
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        default:
 
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                return nil, errors.Errorf("expected a unit or machine tag; got %q", tag)
 
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        }
 
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        setter := agent.APIHostPortsSetter{a}
 
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        w, err := NewAPIAddressUpdater(facade, setter)
 
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        if err != nil {
 
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                return nil, errors.Trace(err)
 
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        }
 
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        return w, nil
 
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}