Add resource type "metric filter" (aws-cloudformation#33)

aws-logs-metricfilter/.gitignore

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+# macOS
+.DS_Store
+._*
+
+# Maven outputs
+.classpath
+
+# IntelliJ
+*.iml
+.idea/
+out.java
+out/
+.settings
+.project
+
+# auto-generated files
+target/
+
+# our logs
+rpdk.log

aws-logs-metricfilter/.rpdk-config

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+{
+    "typeName": "AWS::Logs::MetricFilter",
+    "language": "java",
+    "runtime": "java8",
+    "entrypoint": "software.amazon.logs.metricfilter.HandlerWrapper::handleRequest",
+    "testEntrypoint": "software.amazon.logs.metricfilter.HandlerWrapper::testEntrypoint",
+    "settings": {
+        "namespace": [
+            "software",
+            "amazon",
+            "logs",
+            "metricfilter"
+        ],
+        "codegen_template_path": "guided_aws"
+    }
+}

aws-logs-metricfilter/README.md

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+# AWS::Logs::MetricFilter
+
+Congratulations on starting development! Next steps:
+
+1. Write the JSON schema describing your resource, `aws-logs-metricfilter.json`
+1. Implement your resource handlers.
+
+The RPDK will automatically generate the correct resource model from the schema whenever the project is built via Maven. You can also do this manually with the following command: `cfn generate`.
+
+> Please don't modify files under `target/generated-sources/rpdk`, as they will be automatically overwritten.
+
+The code uses [Lombok](https://projectlombok.org/), and [you may have to install IDE integrations](https://projectlombok.org/setup/overview) to enable auto-complete for Lombok-annotated classes.

aws-logs-metricfilter/aws-logs-metricfilter.json

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+{
+  "typeName": "AWS::Logs::MetricFilter",
+  "resourceLink": {
+    "templateUri": "/cloudwatch/home?region=${awsRegion}#logsV2:log-groups/log-group/${LogGroupName}/edit-metric-filter/${MetricName}",
+    "mappings": {
+      "MetricName": "/MetricName",
+      "LogGroupName": "/LogGroupName"
+    }
+  },
+  "description": "Specifies a metric filter that describes how CloudWatch Logs extracts information from logs and transforms it into Amazon CloudWatch metrics.",
+  "sourceUrl": "https://github.com/aws-cloudformation/aws-cloudformation-resource-providers-logs.git",
+  "definitions": {
+    "MetricTransformation": {
+      "type": "object",
+      "properties": {
+        "DefaultValue": {
+          "description": "The value to emit when a filter pattern does not match a log event. This value can be null.",
+          "type": "number"
+        },
+        "MetricName": {
+          "description": "The name of the CloudWatch metric. Metric name must be in ASCII format.",
+          "type": "string",
+          "minLength": 1,
+          "maxLength": 255,
+          "pattern": "^((?![:*$])[\\x00-\\x7F]){1,255}"
+        },
+        "MetricNamespace": {
+          "$comment": "Namespaces can be up to 256 characters long; valid characters include 0-9A-Za-z.-_/#",
+          "description": "The namespace of the CloudWatch metric.",
+          "type": "string",
+          "minLength": 1,
+          "maxLength": 256,
+          "pattern": "^[0-9a-zA-Z\\.\\-_\\/#]{1,256}"
+        },
+        "MetricValue": {
+          "description": "The value to publish to the CloudWatch metric when a filter pattern matches a log event.",
+          "type": "string",
+          "minLength": 1,
+          "maxLength": 100
+        }
+      },
+      "required": [
+        "MetricName",
+        "MetricNamespace",
+        "MetricValue"
+      ],
+      "additionalProperties": false
+    }
+  },
+  "properties": {
+    "FilterName": {
+      "description": "A name for the metric filter.",
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 512,
+      "pattern": "^[^:*]{1,512}"
+    },
+    "FilterPattern": {
+      "description": "Pattern that Logs follows to interpret each entry in a log.",
+      "type": "string",
+      "maxLength": 1024
+    },
+    "LogGroupName": {
+      "description": "Existing log group that you want to associate with this filter.",
+      "type": "string",
+      "minLength": 1,
+      "maxLength": 512,
+      "pattern": "^[.\\-_/#A-Za-z0-9]{1,512}"
+    },
+    "MetricTransformations": {
+      "description": "A collection of information that defines how metric data gets emitted.",
+      "type": "array",
+      "minItems": 1,
+      "maxItems": 1,
+      "items": {
+        "$ref": "#/definitions/MetricTransformation"
+      }
+    }
+  },
+  "handlers": {
+    "create": {
+      "permissions": [
+        "logs:PutMetricFilter",
+        "logs:DescribeMetricFilters"
+      ]
+    },
+    "read": {
+      "permissions": [
+        "logs:DescribeMetricFilters"
+      ]
+    },
+    "update": {
+      "permissions": [
+        "logs:PutMetricFilter",
+        "logs:DescribeMetricFilters"
+      ]
+    },
+    "delete": {
+      "permissions": [
+        "logs:DeleteMetricFilter"
+      ]
+    },
+    "list": {
+      "permissions": [
+        "logs:DescribeMetricFilters"
+      ]
+    }
+  },
+  "required": [
+    "FilterPattern",
+    "LogGroupName",
+    "MetricTransformations"
+  ],
+  "createOnlyProperties": [
+    "/properties/FilterName",
+    "/properties/LogGroupName"
+  ],
+  "primaryIdentifier": [
+    "/properties/LogGroupName",
+    "/properties/FilterName"
+  ],
+  "additionalProperties": false
+}

aws-logs-metricfilter/lombok.config

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+lombok.addLombokGeneratedAnnotation = true

aws-logs-metricfilter/overrides.json

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+{
+  "CREATE": {
+    "/LogGroupName": "this-is-a-random-loggroup",
+    "/FilterName": "my-metric-filter",
+    "/FilterPattern": "[size]",
+    "/MetricTransformations": [
+      {
+        "MetricValue": 10,
+        "MetricNamespace": "my-namespace",
+        "MetricName": "metric-name"
+      }
+    ]
+  }
+}