[Improvement] state/dynamodb - Support optional stream (widdix#328)

ysrinu95 · Jun 5, 2019 · df2d652 · df2d652
1 parent f4d0d1d
commit df2d652
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Showing 2 changed files with 17 additions and 1 deletion.
diff --git a/.travis.yml b/.travis.yml
@@ -13,6 +13,6 @@ install:
 - 'pip install cfn-lint==0.21.3'
 script:
 - 'yamllint .'
-- 'cfn-lint -i E3002 W2001 W6001 -t ''**/*.yaml''' # TODO get rid of check ignores
+- 'cfn-lint -i E3002 W2001 W6001 W2030 -t ''**/*.yaml''' # TODO get rid of check ignores
 - 'find . -type f -name ''*.yaml'' | while read file; do set -ex && grep -q "LICENSE-2.0" "$file"; done;'
 - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then find . -type f -name ''*.yaml'' | while read file; do set -ex && aws s3 cp "$file" "s3://travis-aws-cf-templates/$TRAVIS_COMMIT/$file" && aws cloudformation validate-template --template-url "https://s3.amazonaws.com/travis-aws-cf-templates/$TRAVIS_COMMIT/$file" > /dev/null; done; fi'
diff --git a/state/dynamodb.yaml b/state/dynamodb.yaml
@@ -35,7 +35,9 @@ Metadata:
       - MaxReadCapacityUnits
       - MinReadCapacityUnits
       - ReadCapacityUnitsUtilizationTarget
+      - Encryption
       - TimeToLiveAttributeName
+      - StreamViewType
 Parameters:
   ParentAlertStack:
     Description: 'Optional but recommended stack name of parent alert stack based on operations/alert.yaml template.'
@@ -100,13 +102,19 @@ Parameters:
     Description: 'Optional name of the Time to Live attribute used to store the expiration time (unix timestamp in seconds)'
     Type: String
     Default: ''
+  StreamViewType:
+    Description: 'Determines the information that the stream captures when an item in the table is modified.'
+    Type: String
+    Default: DISABLED
+    AllowedValues: [DISABLED, KEYS_ONLY, NEW_IMAGE, OLD_IMAGE, NEW_AND_OLD_IMAGES]
 Conditions:
   HasAlertTopic: !Not [!Equals [!Ref ParentAlertStack, '']]
   HasSortKey: !Not [!Equals [!Ref SortKeyName, '']]
   HasTableName: !Not [!Equals [!Ref TableName, '']]
   HasAwsManagedEncryption: !Equals [!Ref Encryption, aws]
   HasBillingAndScalingModeProvisioned: !Equals [!Ref BillingAndScalingMode, PROVISIONED]
   HasTimeToLiveAttributeName: !Not [!Equals [!Ref TimeToLiveAttributeName, '']]
+  HasStream: !Not [!Equals [!Ref StreamViewType, 'DISABLED']]
 Resources:
   Table:
     Type: 'AWS::DynamoDB::Table'
@@ -133,6 +141,7 @@ Resources:
       SSESpecification:
         SSEEnabled: !If [HasAwsManagedEncryption, true, false]
       TimeToLiveSpecification: !If [HasTimeToLiveAttributeName, {AttributeName: !Ref TimeToLiveAttributeName, Enabled: true}, !Ref 'AWS::NoValue']
+      StreamSpecification: !If [HasStream, {StreamViewType: !Ref StreamViewType}, !Ref 'AWS::NoValue']
   RoleScaling:
     Condition: HasBillingAndScalingModeProvisioned
     Type: 'AWS::IAM::Role'
@@ -313,3 +322,10 @@ Outputs:
   TableName:
     Description: 'Name of the table'
     Value: !Ref Table
+    Export:
+      Name: !Sub '${AWS::StackName}-TableName'
+  StreamArn:
+    Condition: HasStream
+    Value: !GetAtt 'Table.StreamArn'
+    Export:
+      Name: !Sub '${AWS::StackName}-StreamArn'