The document discusses the DiscoAPI, which provides a comprehensive service for discovering various OpenJDK distributions, including version support and availability on different operating systems. It includes REST endpoints for accessing major versions, distributions, and packages while detailing usage examples for obtaining specific JDK versions and distributions. Additionally, it highlights plugins and scripts that facilitate the discovery and integration of JDKs into development environments.

1. DISCOAPI

2. Gerrit Grunwald | Senior Developer Advocate | foojay.io
ABOUTME.

3. Discover distributions
of OpenJDK as a
service…

4. Example…

5. You need
JDK 11.0.8

6. Question
1.

7. Which
distribution…?

8. Question
2.

9. Does the distribution
support 11.0.8…?

10. Question
3.

11. Does the distribution
support your OS…?

12. Question
4.

13. Where to get
it from…?

14. Question
5.

15. Are you allowed
to use it…?

16. That who have the choice...
๏Adopt OpenJDK
๏Corretto
๏Dragonwell
๏(GraalVM CE)
๏Liberica
๏(Liberica Native)
๏(Mandrel)
๏Microsoft
๏OJDK Build
๏Open Logic
๏Oracle
๏Oracle OpenJDK
๏RedHat
๏SAP Machine
๏Temurin
๏Trava
๏Zulu
๏Zulu Prime

17. The situation...
๏We have many different distributions
๏Not all distributions support all versions
๏Most distributions are free but some are not
๏Some distributions have special features
๏Every distribution has it’s own way to get it

18. The Idea

19. What about having a
General API that…

20. Serves information about…
๏Distributions
๏Versions
๏Platforms
๏Operating Systems
๏Architectures
๏Archive types
๏Release status
๏Terms of support
๏Package types
๏Signatures

21. DISCOAPI

22. REST
Endpoints

23. https://api.foojay.io
๏/disco/v2.0/major_versions
๏/disco/v2.0/distributions
๏/disco/v2.0/packages
๏/disco/v2.0/packages/jdks
๏/disco/v2.0/packages/jres
๏/disco/v2.0/packages/yaml
๏/disco/v2.0/ephemeral_ids

24. https://api.foojay.io/disco/v2.0/
major_versions

25. /major_versions?
๏ea=true (Early Access)
๏ga=true (General Availability)
๏maintained=true* (Actively maintained, at the moment 7, 8, 11, 13, 15, 16, 17-ea, 18-ea)
*will change over time

26. {
"result": [
{
"major_version": 17,
"term_of_support": "LTS",
"maintained": true,
"versions": [
"17-ea"
]
},
{
"major_version": 16,
"term_of_support": "STS",
"maintained": true,
"versions": [
"16-ea"
]
},
{
"major_version": 15,
"term_of_support": "MTS",
"maintained": true,
"versions": [
"15.0.1",
"15.0.1-ea",
"15",
"15-ea"
]
},
. . .
Returns a list of all
major versions
including early access
versions in a JSON
format
/major_versions

27. /major_versions
๏/latest_sts
๏/latest_mts
๏/latest_lts
๏/latest_ga
๏/latest_ea
๏/MAJOR_VERSION (e.g. 13)
๏/MAJOR_VERSION/ea (e.g. 13/ea)

28. https://api.foojay.io/disco/v2.0/
distributions

29. /distributions
๏/NAME of distribution (e.g. /zulu)

30. {
"result": [
{
"name": "Zulu",
"api_parameter": "zulu",
"hash_algorithm": "",
"hash_uri": "",
"signature_type": "",
"signature_algorithm": "",
"signature_uri": "",
"versions": [
"17-ea",
"16-ea",
"15.0.1",
"15",
"15-ea",
"14.0.2",
"14.0.1",
"14",
"14-ea",
"13.0.5.1",
"13.0.5",
"13.0.4",
"13.0.3",
"13.0.2",
"13.0.1",
"13",
"12.0.2",
"12.0.1",
"12",
"11.0.9.1",
"11.0.9",
"11.0.8",
"11.0.7",
"11.0.6",
...
Returns info about a
speci
fi
c distribution
including all it’s general
availability and early
access updates in
JSON format
/distributions/zulu

31. https://api.foojay.io/disco/v2.0/
packages

32. /packages?
๏version
๏from_version
๏to_version
๏version_by_de
fi
nition
๏distro
๏architecture
๏archive_type
๏package_type
๏operating_system
๏libc_type
๏release_status
๏term_of_support
๏bitness
๏javafx_bundled
๏directly_downloadable*
๏latest

33. directly_downloadable*
๏Oracle JDK
๏RedHat JDK
directly_downloadable => false
We only return the link to their download page !!!

34. {
"result": [
{
"id": "43afdc6785055999f3104208d4b9d703",
"archive_type": "tar.gz",
"distribution": "zulu",
"major_version": 16,
"java_version": "16.0.1",
"distribution_version": "16.30.15",
"latest_build_available": true,
"release_status": "ga",
"term_of_support": "sts",
"operating_system": "linux",
"lib_c_type": "musl",
"architecture": "x64",
"package_type": "jdk",
"javafx_bundled": false,
"directly_downloadable": true,
"filename": "zulu16.30.15-ca-jdk16.0.1-linux_musl_x64.tar.gz",
"ephemeral_id": "c4ffb7a327eebd365750ab7ad6b585bdaf224e9a",
"links": {
"pkg_info_uri": "https://api.foojay.io/disco/v2.0/ephemeral_ids/
c4ffb7a327eebd365750ab7ad6b585bdaf224e9a"
},
"free_use_in_production": true,
"feature": []
},
{
...
}
],
"message": "10 package(s) found"
}
Returns a list of all
packages in JSON
format
/packages

35. OpenSource

36. Source
https://github.com/foojay2020/discoapi

37. Examples...

38. I need the latest JDK,
what is avaiable ?

39. Latest JDK available
[
{
"id": "f5f69da2537cfbf7e6f26e484410b8d1",
"archive_type": "tar.gz",
"distribution": "zulu",
"major_version": 15,
"java_version": "15.0.1",
"distribution_version": "15.28.51.0",
"latest_build_available": true,
"release_status": "ga",
"term_of_support": "mts",
"operating_system": "linux",
"lib_c_type": "musl",
"architecture": "x64",
"package_type": "jdk",
"javafx_bundled": false,
"directly_downloadable": true,
"filename": "zulu15.28.51-ca-jdk15.0.1-linux_musl_x64.tar.gz",
"ephemeral_id": "339f5f69da2537cfbf7e6f26e484410b8d11610452685"
},
{
"id": "aa4851ec455afb6efce8e4bd0a18ee63",
"archive_type": "zip",
"distribution": "zulu",
"major_version": 15,
. . .
Returns a list of all packages
found that contain a JDK and
have the latest available
version (here 15.0.1)
https://api.foojay.io/disco/v2.0/packages?package_type=jdk&latest=available

40. What versions are
available in
distribution XYZ ?

41. Versions available in distribution
{
"name": "Zulu",
"api_parameter": "zulu",
"versions": [
"17-ea",
"16-ea",
"15.0.1",
"15",
"15-ea",
"14.0.2",
"14.0.1",
"14",
"14-ea",
"13.0.5.1",
"13.0.5",
"13.0.4",
"13.0.3",
"13.0.2",
"13.0.1",
"13",
"12.0.2",
"12.0.1",
"12",
"11.0.9.1",
"11.0.9",
. . .
Returns a list of versions in
the Zulu distribution
including all it’s general
availability and early access
updates in JSON format
https://api.foojay.io/disco/v2.0/distributions/zulu

42. Who has
version
11.0.9.1 ?

43. Who has version 11.0.9.1
[
{
"id": "91b37ae0ab88863ba65845b2e1ba5a5d",
"archive_type": "rpm",
"distribution": "zulu",
"major_version": 11,
"java_version": "11.0.9.1",
"distribution_version": "11.43.55.0",
"latest_build_available": true,
"release_status": "ga",
"term_of_support": "lts",
"operating_system": "linux",
"lib_c_type": "glibc",
"architecture": "x86",
"package_type": "jre",
"javafx_bundled": false,
"directly_downloadable": true,
"filename": "zulu11.43.55-ca-jre11.0.9.1-linux.i686.rpm",
"ephemeral_id": "34091b37ae0ab88863ba65845b2e1ba5a5d1610452754"
},
{
"id": "f365a9db0f0a6954b0d4b53e5c42f797",
"archive_type": "zip",
"distribution": "zulu",
"major_version": 11,
. . .
Returns a list of all packages
that have the version number
11.0.9.1 from all distributions
https://api.foojay.io/disco/v2.0/packages?version=11.0.9.1

44. The latest LTS JDK
for Mac OS
incl. JavaFX ?

45. Latest LTS JDK for Mac incl. FX
[
{
"id": "75f55e22ca634f0a39bc88fcff49b9c1",
"archive_type": "tar.gz",
"distribution": "zulu",
"major_version": 11,
"java_version": "11.0.9.1",
"distribution_version": "11.43.55.0",
"latest_build_available": true,
"release_status": "ga",
"term_of_support": "lts",
"operating_system": "macos",
"lib_c_type": "libc",
"architecture": "x64",
"package_type": "jdk",
"javafx_bundled": true,
"directly_downloadable": true,
"filename": "zulu11.43.55-ca-fx-jdk11.0.9.1-macosx_x64.tar.gz",
"ephemeral_id": "41175f55e22ca634f0a39bc88fcff49b9c11610454032"
},
{
"id": "3edab9b6f6661cc5a64ea19e439959e6",
"archive_type": "dmg",
"distribution": "zulu",
"major_version": 11,
. . .
Returns a list of all packages
that have the latest available
long term stable version (here
11.0.9.1) for Mac OS incl.
JavaFX from all distributions
https://api.foojay.io/disco/v2.0/packages?
version_by_de
fi
nition=latest_lts&package_type=jdk&operating_system=macos&javafx_bundled=true&latest=per_version

46. Is there an update
available for 11.0.8 ?

47. Update available for 11.0.8
{
"major_version": 11,
"term_of_support": "LTS",
"maintained": true,
"versions": [
"11.0.9.1",
"11.0.9",
"11.0.8",
"11.0.7",
"11.0.6",
"11.0.5",
"11.0.4",
"11.0.3",
"11.0.2",
"11.0.1",
"11"
]
}
Returns a list of all general
availability updates of the
major version 11.
https://api.foojay.io/disco/v2.0/major_versions/11

48. JDK 1.8.0_275 for
Windows as msi

49. JDK 1.8.0_275 for Windows as msi
[
{
"id": "23310311f36f9092d8db58880dc55ec0",
"archive_type": "msi",
"distribution": "zulu",
"major_version": 8,
"java_version": "8.0.275",
"distribution_version": "8.50.0.51",
"latest_build_available": true,
"release_status": "ga",
"term_of_support": "lts",
"operating_system": "windows",
"lib_c_type": "c_std_lib",
"architecture": "x86",
"package_type": "jdk",
"javafx_bundled": false,
"directly_downloadable": true,
"filename": "zulu8.50.0.51-ca-jdk8.0.275-win_i686.msi",
"ephemeral_id": "32923310311f36f9092d8db58880dc55ec01610454148"
},
{
"id": "949a657c47c2b71d58aebc0b022d4688",
"archive_type": "msi",
"distribution": "zulu",
"major_version": 8,
. . .
Returns a list of all packages
with the version 8.0.275 for
Windows with an archive type
of msi from all distributions
https://api.foojay.io/disco/v2.0/packages?
package_type=jdk&version=1.8.0_275&operating_system=windows&archive_type=msi

50. IDE plugins

51. Intellij
plugin

52. The plugin let you discover and download a
JDK to your local machine.
To install it, search for „DiscoIdea“ on the
Intellij Marketplace.
A plugin to discover/download a JDK
Intellij Plugin

53. Eclipse
plugin

54. The plugin let you discover and download a
JDK to your local machine.
To install it, search for „DiscoEclipse“ on the
Eclipse Marketplace.
A plugin to discover/download a JDK
Eclipse Plugin

55. NetBeans
plugin

56. NetBeans plugin

57. NetBeans plugin

58. NetBeans plugin

59. NetBeans plugin

60. NetBeans plugin

61. Visual Studio
Code
plugin

62. The plugin let you discover and
download a JDK to your local machine.
To install it, search for „DiscoVSC“ on
the Visual Studio Code Marketplace.
A plugin to discover/download a JDK
Visual Studio Code Plugin

63. Browser plugins

64. Chrome
extension

65. The extension let you discover and
download a JDK to your local machine.
To install it, search for „DiscoChrome“
on the chrome web store.
An extension to discover/download a JDK
Chrome Extension

66. Chrome Extension

67. Firefox
add-on

68. The extension let you discover and
download a JDK to your local machine.
To install it, search for „DiscoFox“ on
the
fi
refox addons page.
An extension to discover/download a JDK
Firefox Add-on

69. Edge
extension

70. The extension let you discover and
download a JDK to your local machine.
To install it, search for „DiscoEdge“ on
the Edge plugins page.
An extension to discover/download a JDK
Edge Extension

71. Safari
extension

72. The extension let you discover and
download a JDK to your local machine.
To install it, search for „DiscoSafari“ on
the Mac app store.
An extension to discover/download a JDK
Safari Extension

73. Other plugins

74. Website
plugin

75. The snippet let you discover and download
a JDK to your local machine.
Find an instruction on how to install it for
example on blogger at Harmonic Code
A html snippet to discover/download a JDK
Website Plugin

76. Shell
scripts
$_

77. Scripts
๏disco-distributions.sh
๏disco-major-versions.sh
๏disco-packages.sh
jq needs to be installed!!!

78. disco-distribution.sh
################################
# #
# foojay jdk discovery api #
# #
# disco-distributions.sh #
# #
################################
Be aware that you need to have jq installed
Script parameters:
--version : Returns a list of distributions that support the given version
--name : Returns a distribution with the given name if available
--help : Shows this info
disco-distributions.sh
disco-distributions.sh --version 13.0.5.1
disco-releases.sh --help
Enables you to call the
distributions endpoint of the
disco api and retrieve results
in json format
bash disco-distributions.sh --help

79. disco-major-versions.sh
################################
# #
# foojay jdk discovery api #
# #
# disco-major-versions.sh #
# #
################################
Be aware that you need to have jq installed
Script parameters:
--help : Shows this info
--major-version : Major Version e.g. 1, 5, 9, 11, 18
disco-major-versions.sh
disco-major-versions.sh --maintained true --ea true --ga true
disco-major-versions.sh --ea true
disco-major-versions.sh --ga true
disco-major-versions.sh --version 11 --ea true
disco-major-versions.sh --version 11 --ga true
disco-major-verions.sh --help
Enables you to call the major
versions endpoint of the disco
api and retrieve results in json
format
bash disco-major-versions.sh --help

80. disco-packages.sh
################################
# #
# foojay jdk discovery api #
# #
# disco-packages.sh #
# #
################################
Be aware that you need to have jq and wget installed
Script parameters:
--help : Shows this info
--version : Version (mandatory or version by definition) e.g. 1.8.0_265 or 11 or 13.0.5.1
--version_by_definition : Version by definition (mandatory if no version) e.g. latest, latest_sts, latest_mts,
latest_lts
--distro : Distribution e.g. aoj, aoj_openj9, dragonwell, corretto, liberica,
oracle_open_jdk, redhat, sap_machine, zulu
--architecture : Architecture e.g. aarch64, arm, arm64, mips, ppc, ppc64, ppc64le,
riscv64, s390x, sparc, sparcv9, x64, x86, amd64
--archive_type : File extension e.g. cab, deb, dmg, exe, msi, pkg, rpm, tar, zip
--package_type : Package type e.g. jre, jdk
--operating_system : Operating System (mandatory) e.g. windows, macos, linux
--libc_type : Type of libc e.g. glibc, libc, musl, c_std_lib
--release_status : Release status e.g. ea, ga
--term_of_support : Term of support e.g. sts, mts, lts
--bitness : Bitness e.g. 32, 64
--javafx_bundled : With JavaFX e.g. true, false
--directly_downloadable : Directly downloadable e.g. true, false
--latest : Latest e.g. overall, per_distro
--dest : Destination e.g. /Users/HanSolo
Usage example:
disco-packages.sh --dest /Users/Hansolo --operating_system windows --version 1.8.0_265 --distro zulu --package_type jdk --
architecture x64 --archive_type zip --release_status ga
Enables you to call the
packages endpoint of the
disco api and retrieve results
in json format
bash disco-packages.sh --help

81. Source
https://github.com/foojay2020/discoscripts
</>

82. Other
tools

83. JDK Butler

84. The tools makes use of the
Disco API to let you discover
JDK’s and download them to
your local machine.
A tool that let you discover JDK’s
JDK Butler

85. Get it from github
https://github.com/HanSolo/jdkbutler/releases

86. JDK Mon

87. The tool scans every 3h a
folder that you can de
fi
ne for
installed JDK’s.
It checks for available updates
using the Disco API and
offers the download of the
update.
A tool that monitors all your installed JDK’s
JDK Mon

88. Get it from github
https://github.com/HanSolo/JDKMon/releases

89. github actions

90. When using github actions to
build your project you can use
setup-java@v1.
This will use Zulu as JDK to
build and run.
setup-java@v1
github actions
...
steps:
- uses: actions/checkout@v1
- name: Set up JDK 11
uses: actions/setup-java@v1
with:
java-package: jdk
java-version: 11.0.10
- name: Build with gradle
run: ./gradlew build
...

91. When using github actions to
build your project you can use
setup-java@v2.
No default and you only can
choose between adopt,
adopt-openj9 and zulu.
setup-java@v2
github actions
...
steps:
- uses: actions/checkout@v1
- name: Set up JDK 11
uses: actions/setup-java@v2
with:
java-package: jdk
java-version: '11.0.10'
distribution: 'zulu'
- name: Build with gradle
run: ./gradlew build
...

92. Make use of foojay’s setup-
java@disco to build your code
using the JDK of your choice.
If not de
fi
ned it will default to
Zulu (as it was in setup-java@v1.0).
Use foojay2020/setup-java@disco
github actions
...
steps:
- uses: actions/checkout@v1
- name: Set up JDK 11 Corretto
uses: foojay2020/setup-java@disco
with:
java-package: jdk
java-version: 11.0.10
distro: corretto
- name: Build with gradle
run: ./gradlew build
...

93. We have created a testing
matrix for the Disco API using
github actions. To check what
is available you can simply
take a look at the actions in
the project.
What is available? Check Disco Testing Matrix
github actions

94. Check it out on github
https://github.com/foojay2020/discoTestingMatrix

95. SDKMAN!

96. foojay.io