Feature/topology visualizer contract #205

[Flyur]

API contract for the stream topology visualization feature.
Please, review the data model for the API.

How Has This Been Tested? (put an "X" next to an item)

• No need to
• Manually(please, describe, when necessary)
• Unit checks
• Integration checks
• Covered by existing automation

Checklist (put an "X" next to an item, otherwise PR will fail)

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. ENVIRONMENT VARIABLES)
• My changes generate no new warnings(e.g. Sonar is happy)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

Check out Contributing and Code of Conduct

[sonarqubecloud]

SonarCloud Quality Gate failed.

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[Flyur]

Simplified the data model for now - it contains information about the topology of only one application and without kafka connectors.
simple example of the json:

{
    "processorsNumber": null,
    "topicsNumber": null,
    "topology": {
        "adjacency": {
            "sub-topology 0": [
                "count-resolved-repartition"
            ],
            "count-resolved-repartition": [
                "sub-topology 1"
            ],
            "sub-topology 1": []
        },
        "nodes": {
            "sub-topology 0": {
                "name": "sub-topology 0",
                "type": "SUB_TOPOLOGY",
                "subTopology": {
                    "adjacency": {
                        "KSTREAM-SOURCE-0000000000": [
                            "KSTREAM-TRANSFORM-0000000001"
                        ],
                        "KSTREAM-TRANSFORM-0000000001": [
                            "KSTREAM-SINK-000000002"
                        ],
                        "KSTREAM-SINK-000000002": []
                    },
                    "nodes": {
                        "KSTREAM-SOURCE-0000000000": {
                            "name": "KSTREAM-SOURCE-0000000000",
                            "type": "SOURCE_PROCESSOR",
                            "topics": [
                                "inputTopic"
                            ]
                        },
                        "KSTREAM-TRANSFORM-0000000001": {
                            "name": "KSTREAM-TRANSFORM-0000000001",
                            "type": "PROCESSOR",
                            "stores": [
                                "store 1"
                            ]
                        },
                        "KSTREAM-SINK-000000002": {
                            "name": "KSTREAM-SINK-000000002",
                            "type": "SINK_PROCESSOR",
                            "topic": "count-resolved-repartition"
                        }
                    }
                }
            },
            "count-resolved-repartition": {
                "name": "count-resolved-repartition",
                "type": "TOPIC",
                "inputMessagesNumber": null,
                "outputMessagesNumber": null,
                "lag": null
            },
            "sub-topology 1": {
                "name": "sub-topology 1",
                "type": "SUB_TOPOLOGY",
                "subTopology": {
                    "adjacency": {
                        "KSTREAM-SOURCE-000000003": [
                            "KSTREAM-TRANSFORM-000000004"
                        ],
                        "KSTREAM-TRANSFORM-000000004": [
                            "KSTREAM-SINK-000000005"
                        ],
                        "KSTREAM-SINK-000000005": []
                    },
                    "nodes": {
                        "KSTREAM-SOURCE-000000003": {
                            "name": "KSTREAM-SOURCE-000000003",
                            "type": "SOURCE_PROCESSOR",
                            "topics": [
                                "count-resolved-repartition"
                            ]
                        },
                        "KSTREAM-TRANSFORM-000000004": {
                            "name": "KSTREAM-TRANSFORM-000000004",
                            "type": "PROCESSOR",
                            "stores": [
                                "store 2"
                            ]
                        },
                        "KSTREAM-SINK-000000005": {
                            "name": "KSTREAM-SINK-000000005",
                            "type": "SINK_PROCESSOR",
                            "topic": "streams-count-resolved"
                        }
                    }
                }
            }
        }
    }
}

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

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No Coverage information
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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!

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[germanosin]

LGTM for contract, let's implement reading / parsing part

[Flyur]

@germanosin should we merge it to unblock frontend?

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

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[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
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93 Code Smells

No Coverage information
0.0% Duplication

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
No Duplication information

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
115 Code Smells

No Coverage information
0.0% Duplication