Suggestion: Use Builder pattern for inputting parameters of Ali-cloud

[OddCN]

For example, the current way to create a new node of Ali-cloud is:

	alicloud, _ := gocloud.CloudProvider(gocloud.Aliprovider)
	create := map[string]interface{}{
		"RegionId":            "cn-qingdao",
		"ImageId":             "centos_7_04_64_20G_alibase_201701015.vhd",
		"InstanceType":        "ecs.xn4.small",
		"SecurityGroupId":     "sg-m5egbo9s5xb21kpu6nk2",
	}
	resp, err := alicloud.Createnode(create)

The Problem

In the current way, we cannot prevent user from entering wrong parameter name and missing required parameters.

Suggestion

If we use Builder pattern like this:

	alicloud, _ := gocloud.CloudProvider(gocloud.Aliprovider)
	createNodeBuilder := ecs.NewCreateNodeBuilder().
		RegionID("cn-qingdao").
		ImageID("centos_7_04_64_20G_alibase_201701015.vhd").
		InstanceType("ecs.xn4.small").
		SecurityGroupID("sg-m5egbo9s5xb21kpu6nk2")
	createNode, err := createNodeBuilder.Build()

	if err != nil {
		// May miss required parameters
	}
	resp, err := alicloud.Createnode(createNode)

We can

• Prevent user from inputting wrong parameter name
• Throw an error when user miss input required parameters
• Let user add parameters in different places
• Let user have higher freedom, clearer code

[shlokgilda]

I second this suggestion.

[PratikDhanave]

this is good suggestion one we cover all cloud providers we can do this in gocloud 2.0

[PratikDhanave]

+1

[OddCN]

@PratikDhanave That's great!