Signed-off-by: jagpreetsinghsasan <[email protected]>

feat(fabric): add prometheus metrics support to the OpenAPI specs of the plugin

	Primary Change
	--------------

	1. The fabric ledger connector plugin now includes the prometheus metrics exporter integration
	2. OpenAPI spec now has api endpoint for the getting the prometheus metrics

	Refactorings that were also necessary to accomodate 1) and 2)
	------------------------------------------------------------

	3. The generate-sdk command now has DateTime mapping to Date (to read Date as Date object instead of string)
	4. GetPrometheusMetricsV1 class is created to handle the corresponding api endpoint
	5. IPluginLedgerConnectorFabricOptions interface in PluginLedgerConnectorFabric class now has a prometheusExporter optional field
	6. The PluginLedgerConnectorFabric class has relevant functions and codes to incorporate prometheus exporter
	7. run-transaction-endpoint-v1.test is changed to incorporate the prometheus exporter for both fabric 1.4.x and 2.x versions

	Fixes hyperledger-cacti#531

Author: jagpreetsinghsasan

packages/cactus-plugin-ledger-connector-fabric/package-lock.json

@@ -12,7 +12,7 @@
     "dist/*"
   ],
   "scripts": {
-    "generate-sdk": "openapi-generator generate --input-spec src/main/json/openapi.json -g typescript-axios -o ./src/main/typescript/generated/openapi/typescript-axios/ --reserved-words-mappings protected=protected",
+    "generate-sdk": "openapi-generator generate --input-spec src/main/json/openapi.json -g typescript-axios -o ./src/main/typescript/generated/openapi/typescript-axios/ --reserved-words-mappings protected=protected --type-mappings=DateTime=Date",
     "pretsc": "npm run generate-sdk",
     "tsc": "tsc --project ./tsconfig.json",
     "watch": "npm-watch",
@@ -95,6 +95,7 @@
     "ngo": "2.6.2",
     "node-ssh": "11.0.0",
     "openapi-types": "7.0.1",
+    "prom-client": "13.0.0",
     "temp": "0.9.1",
     "typescript-optional": "2.0.1",
     "uuid": "8.3.0",

packages/cactus-plugin-ledger-connector-fabric/package.json

@@ -286,6 +286,69 @@
                         "type": "string"
                     }
                 }
+            },
+            "Transaction": {
+                "type": "object",
+                "required": [
+                    "startTime",
+                    "endTime"
+                ],
+                "properties": {
+                    "startTime":{
+                        "format": "date-time",
+                        "type": "string"
+                    },
+                    "endTime":{
+                        "format": "date-time",
+                        "type": "string"
+                    }
+                }
+            },
+            "Transactions": {
+                "type": "array",
+                "items":{
+                    "$ref": "#/components/schemas/Transaction"
+                }
+            },
+            "PrometheusExporter": {
+                "type": "object",
+                "required": [
+                    "metricsPollingIntervalInMin"
+                ],
+                "properties": {
+                    "metricsPollingIntervalInMin": {
+                        "description": "The polling interval for the prometheus exporter (in minutes)",
+                        "type": "number",
+                        "nullable": false
+                    },
+                    "transactions":{
+                        "description": "The transcation queue",
+                        "$ref": "#/components/schemas/Transactions"
+                    }
+                }
+            },
+            "PrometheusExporterMetricsRequest": {
+                "type": "object",
+                "required": [
+                    "promExporter"
+                ],
+                "properties": {
+                    "promExporter":{
+                        "description": "The prometheus exporter class object",
+                        "$ref": "#/components/schemas/PrometheusExporter"
+                    }
+                }
+            },
+            "PrometheusExporterMetricsResponse": {
+                "type": "object",
+                "required": [
+                    "result"
+                ],
+                "properties": {
+                    "result": {
+                        "type": "string"
+                    }
+                }
             }
         }
     },
@@ -368,6 +431,40 @@
                     }
                 }
             }
+        },
+        "/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-fabric/get-prometheus-exporter-metrics": {
+            "get": {
+                "x-hyperledger-cactus": {
+                    "http": {
+                        "verbLowerCase": "get",
+                        "path": "/api/v1/plugins/@hyperledger/cactus-plugin-ledger-connector-fabric/get-prometheus-exporter-metrics"
+                    }
+                },
+                "operationId": "getPrometheusExporterMetricsV1",
+                "summary": "Get the Prometheus Metrics",
+                "parameters": [],
+                "requestBody": {
+                    "content": {
+                        "application/json": {
+                            "schema": {
+                                "$ref": "#/components/schemas/PrometheusExporterMetricsRequest"
+                            }
+                        }
+                    }
+                },
+                "responses": {
+                    "200": {
+                        "description": "OK",
+                        "content": {
+                            "application/json": {
+                                "schema": {
+                                    "$ref": "#/components/schemas/PrometheusExporterMetricsResponse"
+                                }
+                            }
+                        }
+                    }
+                }
+            }
         }
     }
 }

packages/cactus-plugin-ledger-connector-fabric/src/main/json/openapi.json

@@ -24,3 +24,4 @@
 
 git_push.sh
 .npmignore
+.gitignore

packages/cactus-plugin-ledger-connector-fabric/src/main/typescript/generated/openapi/typescript-axios/.openapi-generator-ignore

@@ -1,4 +1,3 @@
-.gitignore
 api.ts
 base.ts
 configuration.ts