Sample json Payload from Gitlab WebHook

gitlab_webhook.json

{
  "object_kind": "push",
  "event_name": "push",
  "before": "ecb9ff44aa0",
  "after": "fa61658291900e59df0",
  "ref": "refs/heads/my_branch_name",
  "checkout_sha": "fa61658291900e59df0",
  "message": null,
  "user_id": 220253,
  "user_name": "JRichardsz",
  "user_username": "Richardsz",
  "user_email": "",
  "user_avatar": "https://assets.gitlab-static.net/uploads/-/system/user/avatar/220253/agente3.png",
  "project_id": 14796876,
  "project": {
    "id": 14796876,
    "name": "gitlab_repository",
    "description": "",
    "web_url": "https://gitlab.com/Richardsz/gitlab_repository",
    "avatar_url": null,
    "git_ssh_url": "git@gitlab.com:Richardsz/gitlab_repository.git",
    "git_http_url": "https://gitlab.com/Richardsz/gitlab_repository.git",
    "namespace": "JRichardsz",
    "visibility_level": 20,
    "path_with_namespace": "Richardsz/gitlab_repository",
    "default_branch": "master",
    "ci_config_path": null,
    "homepage": "https://gitlab.com/Richardsz/gitlab_repository",
    "url": "git@gitlab.com:Richardsz/gitlab_repository.git",
    "ssh_url": "git@gitlab.com:Richardsz/gitlab_repository.git",
    "http_url": "https://gitlab.com/Richardsz/gitlab_repository.git"
  },
  "commits": [
    {
      "id": "fa61658291900e59df0",
      "message": "Update README.md",
      "timestamp": "2019-10-13T16:44:05Z",
      "url": "https://gitlab.com/Richardsz/gitlab_repository/commit/fa61658291900e59df0",
      "author": {
        "name": "JRichardsz",
        "email": "jrichardsz.java@gmail.com"
      },
      "added": [],
      "modified": [
        "README.md"
      ],
      "removed": []
    }
  ],
  "total_commits_count": 1,
  "push_options": {},
  "repository": {
    "name": "gitlab_repository",
    "url": "git@gitlab.com:Richardsz/gitlab_repository.git",
    "description": "",
    "homepage": "https://gitlab.com/Richardsz/gitlab_repository",
    "git_http_url": "https://gitlab.com/Richardsz/gitlab_repository.git",
    "git_ssh_url": "git@gitlab.com:Richardsz/gitlab_repository.git",
    "visibility_level": 20
  }
}

How to retrieve this data once the push event is triggered by using java api from gitlab??

• First you need to create a simple post controller with java. It could be a simple servlet or something advanced with springboot
• Deploy it in some cloud. It is mandatory to have public access with IP, domain, or subdomain
• Then you need to configure the url in gitlab. Check this https://jrichardsz.github.io/devops/configure-webhooks-in-github-bitbucket-gitlab