{"id":23126383,"url":"https://github.com/theangrydev/singleton-enforcer","last_synced_at":"2025-06-10T12:33:42.420Z","repository":{"id":57735006,"uuid":"62919175","full_name":"theangrydev/singleton-enforcer","owner":"theangrydev","description":"Tool to enforce that certain classes are only ever constructed once","archived":false,"fork":false,"pushed_at":"2018-10-16T20:11:13.000Z","size":84,"stargazers_count":0,"open_issues_count":4,"forks_count":0,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-02-09T16:42:51.888Z","etag":null,"topics":["enforce","scope","singleton","static-analysis"],"latest_commit_sha":null,"homepage":"","language":"Java","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"apache-2.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/theangrydev.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":"LICENSE.txt","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2016-07-08T21:45:23.000Z","updated_at":"2018-10-16T20:11:15.000Z","dependencies_parsed_at":"2022-08-24T01:51:13.178Z","dependency_job_id":null,"html_url":"https://github.com/theangrydev/singleton-enforcer","commit_stats":null,"previous_names":[],"tags_count":5,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/theangrydev%2Fsingleton-enforcer","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/theangrydev%2Fsingleton-enforcer/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/theangrydev%2Fsingleton-enforcer/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/theangrydev%2Fsingleton-enforcer/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/theangrydev","download_url":"https://codeload.github.com/theangrydev/singleton-enforcer/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":247124783,"owners_count":20887566,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["enforce","scope","singleton","static-analysis"],"created_at":"2024-12-17T08:30:43.241Z","updated_at":"2025-04-04T05:23:37.593Z","avatar_url":"https://github.com/theangrydev.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"[![Maven Central](https://img.shields.io/maven-central/v/io.github.theangrydev/singleton-enforcer.svg)](https://mvnrepository.com/artifact/io.github.theangrydev/singleton-enforcer)\n[![Javadoc](http://javadoc-badge.appspot.com/io.github.theangrydev/singleton-enforcer.svg?label=javadoc)](http://javadoc-badge.appspot.com/io.github.theangrydev/singleton-enforcer)\n[![Gitter](https://badges.gitter.im/singleton-enforcer/Lobby.svg)](https://gitter.im/singleton-enforcer/Lobby?utm_source=badge\u0026utm_medium=badge\u0026utm_campaign=pr-badge)\n\n[![Build Status](https://travis-ci.org/theangrydev/singleton-enforcer.svg?branch=master)](https://travis-ci.org/theangrydev/singleton-enforcer)\n[![codecov](https://codecov.io/gh/theangrydev/singleton-enforcer/branch/master/graph/badge.svg)](https://codecov.io/gh/theangrydev/singleton-enforcer)\n[![Codacy Badge](https://api.codacy.com/project/badge/Grade/ea483778bdf04ad899c81afd058299eb)](https://www.codacy.com/app/liam-williams/singleton-enforcer?utm_source=github.com\u0026amp;utm_medium=referral\u0026amp;utm_content=theangrydev/singleton-enforcer\u0026amp;utm_campaign=Badge_Grade)\n[![codebeat badge](https://codebeat.co/badges/f6dc7555-60d8-4429-bf84-471d7c55f132)](https://codebeat.co/projects/github-com-theangrydev-singleton-enforcer)\n\n[![Quality Gate](https://sonarcloud.io/api/project_badges/quality_gate?project=io.github.theangrydev:singleton-enforcer)](https://sonarcloud.io/dashboard?id=io.github.theangrydev:singleton-enforcer)\n\n# singleton-enforcer\nTool to enforce that certain classes are ony ever constructed once\n\n[Example:](https://github.com/theangrydev/singleton-enforcer/blob/master/src/test/java/acceptance/ExampleTest.java)\n```java\npublic class ExampleTest {\n\n    @Rule\n    public SingletonEnforcer singletonEnforcer = SingletonEnforcer.enforcePackage(\"example\");\n\n    @Test(expected = AssertionError.class)\n    public void singletonConstructedTwiceWillThrowException() {\n        singletonEnforcer.during(() -\u003e {\n            new Singleton();\n            new Singleton();\n        }).checkSingletonsAreConstructedOnce(Singleton.class);\n    }\n\n    @Test(expected = AssertionError.class)\n    public void leakedDependencyWillThrowAssertionError() {\n        singletonEnforcer.during(() -\u003e {\n            LeakedDependencyInterface leakedDependency = new LeakedDependency();\n            new SingletonWithDependency(leakedDependency, new Object());\n            new ClassWithLeakedDependency(leakedDependency);\n        }).checkDependencyIsNotLeaked(SingletonWithDependency.class, LeakedDependencyInterface.class);\n    }\n}\n```\n\nDependency:\n```xml\n\u003cdependency\u003e\n    \u003cgroupId\u003eio.github.theangrydev\u003c/groupId\u003e\n    \u003cartifactId\u003esingleton-enforcer\u003c/artifactId\u003e\n    \u003cversion\u003e2.1.0\u003c/version\u003e\n\u003c/dependency\u003e\n```\n\n## Releases\n### 2.1.0\n* Made the public API thread safe\n* Added documentation for the public API\n\n### 2.0.1\n* Turned `SingletonEnforcer` into a JUnit `@Rule`\n* Added a method `SingletonEnforcer.during` that takes a `Runnable` that should execute some code that the assertions will be made about\n* Added a checks to make sure that the classes in the package to enforce are instrumented before use\n* Added a check to make sure that instrumented classes are not used outside of `SingletonEnforcer.during`\n\n### 1.0.1\n* Tool to enforce that certain classes are ony ever constructed once\n* `SingletonEnforcer` must be `setUp` before use with the package to cover and `tearDown` must be called after use\n* `SingletonEnforcer.checkSingletons` checks that the given classes were only constructed once \n* `SingletonEnforcer.checkSingletonDependenciesAreNotLeaked` checks that a dependency of a singleton is only used inside that singleton and not passed on to other objects\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftheangrydev%2Fsingleton-enforcer","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Ftheangrydev%2Fsingleton-enforcer","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Ftheangrydev%2Fsingleton-enforcer/lists"}