{"id":37021451,"url":"https://github.com/dcs-chalmers/haren","last_synced_at":"2026-01-14T02:32:08.139Z","repository":{"id":45419039,"uuid":"223925779","full_name":"dcs-chalmers/haren","owner":"dcs-chalmers","description":"Scheduling framework for stream processing systems","archived":false,"fork":false,"pushed_at":"2024-02-05T22:12:10.000Z","size":672,"stargazers_count":1,"open_issues_count":2,"forks_count":0,"subscribers_count":5,"default_branch":"master","last_synced_at":"2025-08-07T08:18:36.503Z","etag":null,"topics":["scheduling","stream-processing"],"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/dcs-chalmers.png","metadata":{"files":{"readme":"README.md","changelog":null,"contributing":null,"funding":null,"license":null,"code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2019-11-25T10:50:10.000Z","updated_at":"2022-02-13T12:00:19.000Z","dependencies_parsed_at":"2022-09-14T13:22:31.637Z","dependency_job_id":null,"html_url":"https://github.com/dcs-chalmers/haren","commit_stats":null,"previous_names":[],"tags_count":0,"template":false,"template_full_name":null,"purl":"pkg:github/dcs-chalmers/haren","repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcs-chalmers%2Fharen","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcs-chalmers%2Fharen/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcs-chalmers%2Fharen/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcs-chalmers%2Fharen/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/dcs-chalmers","download_url":"https://codeload.github.com/dcs-chalmers/haren/tar.gz/refs/heads/master","sbom_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/dcs-chalmers%2Fharen/sbom","scorecard":{"id":329983,"data":{"date":"2025-08-11","repo":{"name":"github.com/dcs-chalmers/haren","commit":"389d47f9587222b16ec57394f8b9a1707844c7ee"},"scorecard":{"version":"v5.2.1-40-gf6ed084d","commit":"f6ed084d17c9236477efd66e5b258b9d4cc7b389"},"score":2.3,"checks":[{"name":"Token-Permissions","score":-1,"reason":"No tokens found","details":null,"documentation":{"short":"Determines if the project's workflows follow the principle of least privilege.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#token-permissions"}},{"name":"Packaging","score":-1,"reason":"packaging workflow not detected","details":["Warn: no GitHub/GitLab publishing workflow detected."],"documentation":{"short":"Determines if the project is published as a package that others can easily download, install, easily update, and uninstall.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#packaging"}},{"name":"Dangerous-Workflow","score":-1,"reason":"no workflows found","details":null,"documentation":{"short":"Determines if the project's GitHub Action workflows avoid dangerous patterns.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#dangerous-workflow"}},{"name":"Code-Review","score":0,"reason":"Found 0/14 approved changesets -- score normalized to 0","details":null,"documentation":{"short":"Determines if the project requires human code review before pull requests (aka merge requests) are merged.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#code-review"}},{"name":"Maintained","score":0,"reason":"0 commit(s) and 0 issue activity found in the last 90 days -- score normalized to 0","details":null,"documentation":{"short":"Determines if the project is \"actively maintained\".","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#maintained"}},{"name":"SAST","score":0,"reason":"no SAST tool detected","details":["Warn: no pull requests merged into dev branch"],"documentation":{"short":"Determines if the project uses static code analysis.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#sast"}},{"name":"Binary-Artifacts","score":10,"reason":"no binaries found in the repo","details":null,"documentation":{"short":"Determines if the project has generated executable (binary) artifacts in the source repository.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#binary-artifacts"}},{"name":"Pinned-Dependencies","score":-1,"reason":"no dependencies found","details":null,"documentation":{"short":"Determines if the project has declared and pinned the dependencies of its build process.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#pinned-dependencies"}},{"name":"CII-Best-Practices","score":0,"reason":"no effort to earn an OpenSSF best practices badge detected","details":null,"documentation":{"short":"Determines if the project has an OpenSSF (formerly CII) Best Practices Badge.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#cii-best-practices"}},{"name":"Security-Policy","score":0,"reason":"security policy file not detected","details":["Warn: no security policy file detected","Warn: no security file to analyze","Warn: no security file to analyze","Warn: no security file to analyze"],"documentation":{"short":"Determines if the project has published a security policy.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#security-policy"}},{"name":"Fuzzing","score":0,"reason":"project is not fuzzed","details":["Warn: no fuzzer integrations found"],"documentation":{"short":"Determines if the project uses fuzzing.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#fuzzing"}},{"name":"Signed-Releases","score":-1,"reason":"no releases found","details":null,"documentation":{"short":"Determines if the project cryptographically signs release artifacts.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#signed-releases"}},{"name":"License","score":10,"reason":"license file detected","details":["Info: project has a license file: LICENCE:0","Info: FSF or OSI recognized license: Apache License 2.0: LICENCE:0"],"documentation":{"short":"Determines if the project has defined a license.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#license"}},{"name":"Branch-Protection","score":0,"reason":"branch protection not enabled on development/release branches","details":["Warn: branch protection not enabled for branch 'master'"],"documentation":{"short":"Determines if the default and release branches are protected with GitHub's branch protection settings.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#branch-protection"}},{"name":"Vulnerabilities","score":4,"reason":"6 existing vulnerabilities detected","details":["Warn: Project is vulnerable to: GHSA-j288-q9x7-2f5v","Warn: Project is vulnerable to: GHSA-7rjr-3q55-vv33","Warn: Project is vulnerable to: GHSA-8489-44mv-ggj8","Warn: Project is vulnerable to: GHSA-jfh8-c2jp-5v3q","Warn: Project is vulnerable to: GHSA-p6xc-xr62-6r2g","Warn: Project is vulnerable to: GHSA-vwqq-5vrc-xw9h"],"documentation":{"short":"Determines if the project has open, known unfixed vulnerabilities.","url":"https://github.com/ossf/scorecard/blob/f6ed084d17c9236477efd66e5b258b9d4cc7b389/docs/checks.md#vulnerabilities"}}]},"last_synced_at":"2025-08-18T03:20:19.393Z","repository_id":45419039,"created_at":"2025-08-18T03:20:19.393Z","updated_at":"2025-08-18T03:20:19.393Z"},"host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":286080680,"owners_count":28408711,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2026-01-14T01:52:23.358Z","status":"online","status_checked_at":"2026-01-14T02:00:06.678Z","response_time":107,"last_error":null,"robots_txt_status":"success","robots_txt_updated_at":"2025-07-24T06:49:26.215Z","robots_txt_url":"https://github.com/robots.txt","online":true,"can_crawl_api":true,"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":["scheduling","stream-processing"],"created_at":"2026-01-14T02:32:07.523Z","updated_at":"2026-01-14T02:32:08.134Z","avatar_url":"https://github.com/dcs-chalmers.png","language":"Java","funding_links":[],"categories":[],"sub_categories":[],"readme":"# Haren\n\n![Haren outline](media/haren_middleware_demo.png)\n\nHaren is a **scheduling framework for stream processing systems**. It executes streaming operators \nusing a group of Processing Threads (PTs) and allows the developer to easily implement and enforce\nscheduling policies. It abstracts the state of streaming components as abritrary *features*, that are\nused by *user-defined scheduling functions* to define intra- and inter-thread scheduling rules. \n\nFor detailed information, please refer to the ACM DEBS'19 publication introducing the framework:\n\n\u003e *Dimitris Palyvos-Giannas, Vincenzo Gulisano, and Marina Papatriantafilou*. 2019. **Haren: A Framework for Ad-Hoc Thread Scheduling Policies for Data Streaming Applications**. In Proceedings of the 13th ACM International Conference on Distributed and Event-based Systems (DEBS ‘19). ACM, New York, NY, USA, 19-30. DOI: https://doi.org/10.1145/3328905.3329505\n\n\n\n\n## Usage\n\n\n### Project Setup\n\nInclude the following in your `pom.xml`:\n\n```xml\n\u003cdependencies\u003e\n    \u003cdependency\u003e\n      \u003cgroupId\u003eio.palyvos\u003c/groupId\u003e\n      \u003cartifactId\u003eharen\u003c/artifactId\u003e\n      \u003cversion\u003e0.1\u003c/version\u003e\n    \u003c/dependency\u003e\n    \u003c!-- ... --\u003e\n\u003c/dependencies\u003e\n```\n\n### Main Classes\n\nHaren can be coupled with an SPE using the `Task` and `HarenScheduler` entities, where a Task is a\nunit of execution (e.g., an operator) that will be scheduled by `HarenScheduler`.\nThe scheduling behavior is controlled by defining an appropriate \n`InterThreadSchedulingFunction`, which controls the assignment of a `Task` to processing threads and\nan `IntraThreadSchedulingFunction`,\nwhich controls the prioritization of tasks in each thread.\n\n\n### Scheduling Phases\n\nThe figure below shows a high-level overview of the different scheduling stages of Haren.\n\n\n\u003cimg src=\"resources/haren-overview.png\" width=\"400\" alt=\"haren overview\"\u003e\n\n\n\n\n\n\n\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdcs-chalmers%2Fharen","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdcs-chalmers%2Fharen","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdcs-chalmers%2Fharen/lists"}