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Rework LaunchTemplateBackend to be keep only one copy of a template, and be ordered

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The original LaunchTemplateBackend kept two copies of a template, one
for referencing it by name and one for referencing it by id. This change
switches to using one copy, by id, and adding a lookup dict for mapping
names to ids.

Additionally, to fix the python2 test ordering issues, the launch
template dict was changed to an OrderedDict.
This commit is contained in:
Don Kuntz 2019-08-14 17:31:57 -05:00
parent 5f80014332
commit ed82264806
2 changed files with 21 additions and 16 deletions
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33
moto/ec2/models.py
View File

@ -4166,31 +4166,36 @@ class LaunchTemplate(TaggedEC2Resource):
class LaunchTemplateBackend(object):
def __init__(self):
self.launch_templates_by_name = {}
self.launch_templates_by_id = {}
self.launch_template_name_to_ids = {}
self.launch_templates = OrderedDict()
self.launch_template_insert_order = []
super(LaunchTemplateBackend, self).__init__()
def create_launch_template(self, name, description, template_data):
if name in self.launch_templates_by_name:
if name in self.launch_template_name_to_ids:
raise InvalidLaunchTemplateNameError()
template = LaunchTemplate(self, name, template_data, description)
self.launch_templates_by_id[template.id] = template
self.launch_templates_by_name[template.name] = template
self.launch_templates[template.id] = template
self.launch_template_name_to_ids[template.name] = template.id
self.launch_template_insert_order.append(template.id)
return template
def get_launch_template_by_name(self, name):
return self.launch_templates_by_name[name]
def get_launch_template(self, template_id):
return self.launch_templates[template_id]
def get_launch_template_by_id(self, templ_id):
return self.launch_templates_by_id[templ_id]
def get_launch_template_by_name(self, name):
return self.get_launch_template(self.launch_template_name_to_ids[name])
def get_launch_templates(self, template_names=None, template_ids=None, filters=None):
if template_names and not template_ids:
template_ids = []
for name in template_names:
template_ids.append(self.launch_template_name_to_ids[name])
if template_ids:
templates = [self.launch_templates_by_id[tid] for tid in template_ids]
elif template_names:
templates = [self.launch_templates_by_name[name] for name in template_names]
templates = [self.launch_templates[tid] for tid in template_ids]
else:
templates = list(self.launch_templates_by_name.values())
templates = list(self.launch_templates.values())
return generic_filter(filters, templates)
@ -4260,7 +4265,7 @@ class EC2Backend(BaseBackend, InstanceBackend, TagBackend, EBSBackend,
self.describe_internet_gateways(
internet_gateway_ids=[resource_id])
elif resource_prefix == EC2_RESOURCE_TO_PREFIX['launch-template']:
self.get_launch_template_by_id(resource_id)
self.get_launch_template(resource_id)
elif resource_prefix == EC2_RESOURCE_TO_PREFIX['network-acl']:
self.get_all_network_acls()
elif resource_prefix == EC2_RESOURCE_TO_PREFIX['network-interface']:

4
moto/ec2/responses/launch_templates.py
View File

@ -127,7 +127,7 @@ class LaunchTemplates(BaseResponse):
if name:
template = self.ec2_backend.get_launch_template_by_name(name)
if tmpl_id:
template = self.ec2_backend.get_launch_template_by_id(tmpl_id)
template = self.ec2_backend.get_launch_template(tmpl_id)
version_description = self._get_param('VersionDescription')
@ -162,7 +162,7 @@ class LaunchTemplates(BaseResponse):
if name:
template = self.ec2_backend.get_launch_template_by_name(name)
if template_id:
template = self.ec2_backend.get_launch_template_by_id(template_id)
template = self.ec2_backend.get_launch_template(template_id)
max_results = self._get_int_param("MaxResults", 15)
versions = self._get_multi_param("Versions")