Now that jlink
exists, it's become fashionable to bundle a JVM along
with your Java bytecode. In applications that use the
JPMS, the jlink tool
can calculate the transitive closure of required modules and produce
a tiny JVM that contains your application modules and only those
platform modules required to run the application.
Because I'm using OSGi, I don't care
about this particular aspect of jlink. What I am interested
in is that, because of jlink, it has become a lot
easier to bundle a JVM with an application. Projects such as
AdoptOpenJDK produce production-ready
builds of JVMs for a large range of platforms and architectures,
including Hotspot and OpenJ9 VMs.
Now there is a downside to this: Java applications should, by their
very nature, be completely platform-independent. If I give someone
a jar file of Java 11 bytecode, it should run correctly on any JVM
on any platform supporting Java 11+. If I instead start producing one
distribution per platform and architecture including a bundled JVM,
then by definition my application distributions are no longer
platform-independent. Worse, even though jlink still bundles your
application's bytecode along with the produced JVM, that bytecode
is (by default) stored in an undocumented binary format along with
the platform modules as one indivisible lump. I don't believe it's
possible for the user to say "well, I don't want to use the bundled
JVM, I'll just point my system JVM at the classes and use that".
What I would much rather do is still produce one distribution
that contains a bundled JVM for each of the common platforms and
architectures (let's say Linux x86_64, Windows x86_64, and MacOS x86_64) but also provide a basic shell script that can be used to
start the application from a system JVM if the user so wishes (with
the support caveat that if it doesn't work, they're on their own).
The bytecode should still be stored exactly as it was in the original
jar files (and in my case, would actually have to be stored like
this because the jar files are OSGi bundles).
The ideal situation would be if I could have a Maven plugin that, given a range of platforms and architectures, automatically fetched one runtime suitable for each platform/architecture and then packaged up the whole application including all of the runtimes into one platform-independent distribution archive.
So, I've decided to write one!
The CoffeePick project provides an API and an interactive shell used to search for and download Java runtimes. The API works via a pluggable service provider model where new repositories of runtimes can be added at build-time or, if running on OSGi, at run-time.
Currently, arguably the two most popular places to get JVMs are:
The CoffeePick project currently contains providers for both of those repositories, and the AdoptOpenJDK module automatically finds new builds as the AdoptOpenJDK project publishes them.
There now follows small demo of the interactive shell.
First, we start up the shell:
$ java -jar com.io7m.coffeepick.shell/target/com.io7m.coffeepick.shell-0.0.1-main.jar User directory: /home/rm/local/coffeepick Loading repositories… INFO com.io7m.coffeepick.client.vanilla.CoffeePickCatalog: setting up repository from provider net.java.jdk (urn:net.java.jdk) INFO com.io7m.coffeepick.client.vanilla.CoffeePickCatalog: setting up repository from provider net.adoptopenjdk.raw (urn:net.adoptopenjdk.raw)
The shell uses jline3 internally and so has a full command-line history and limited tab-completion for command names.
Let's say we want to grab a Java 11 compatible runtime that will execute
on Linux on the x86_64 architecture. The CoffeePick API refers to the
current set of runtimes that we can download as the catalog. The catalog
command, without any arguments, will list every available runtime:
[coffeepick]$ catalog ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags 8eee0aede947b804f9a5f49c8a38b52aace8a30a9ebd9383b7d06042fb5a237c | aarch64 | linux | 8 | hotspot | jdk | 75.38 MB | urn:net.adoptopenjdk.raw | production b0b3923a48243fa98b71c7fd8ff96def453e07b33156e90cb6851b7b7cacd4b1 | aarch64 | linux | 8 | hotspot | jre | 39.53 MB | urn:net.adoptopenjdk.raw | production 4f245d8bb2e6b84876edcc3573d9f8609e7596cb99102419b2174ed146aca642 | ppc64 | aix | 8 | openj9 | jdk | 87.50 MB | urn:net.adoptopenjdk.raw | production af2532a428fbeb6e6896279a874a3d4b574b74a6ebeae16e4771d7ad517f653a | ppc64le | linux | 8 | openj9 | jdk | 89.53 MB | urn:net.adoptopenjdk.raw | production e7fd779a6448259641565ca31f258d11052c9997e762bc63bbaa2b5776de98f1 | ppc64le | linux | 8 | openj9 | jre | 48.62 MB | urn:net.adoptopenjdk.raw | production b092f4e6553a7c50872b0963f4de2b3a2bce78ce11d1bf1905a2ad5a6576924b | s390x | linux | 8 | openj9 | jdk | 90.37 MB | urn:net.adoptopenjdk.raw | production f0bc82fa49a2a02e881d403170cd8b273fc3d1585a4e65ff639666f056ce7362 | x64 | linux | 8 | openj9 | jdk | 90.12 MB | urn:net.adoptopenjdk.raw | large-heap production fd7035c60ad3060fccf7ab67c15b722302a1863ebddd3141dc3dd98bd0b25a68 | x64 | linux | 8 | openj9 | jdk | 90.24 MB | urn:net.adoptopenjdk.raw | production d1ee522053bb4135536b1d3173be8224bf54563d166e882b7ee2ccf609c2517f | aarch64 | linux | 9 | hotspot | jdk | 190.65 MB | urn:net.adoptopenjdk.raw | production 36e4955c0fec6ff6494c5274e6950fdd45e73b11ebe97efdcb9768e07981f626 | aarch64 | linux | 9 | hotspot | jre | 37.12 MB | urn:net.adoptopenjdk.raw | production d304cbfc9674ff1e1b0caf916b59c32ee9c477e5be6cfa071131b866cd54ec4c | ppc64 | aix | 9 | hotspot | jdk | 198.43 MB | urn:net.adoptopenjdk.raw | production 359c65179f839c5ba0959710803c556c3ce2046dcb0762f2165595706b9b8272 | ppc64le | linux | 9 | hotspot | jre | 36.84 MB | urn:net.adoptopenjdk.raw | production bd4736feea702c859102bb78145fe3c7dbf6774ce1d66d00a9fc582d6bbeb564 | ppc64le | linux | 9 | hotspot | jdk | 190.36 MB | urn:net.adoptopenjdk.raw | production 6382fe043c0ef1cf5b38cf3f70cc300bbdd66f16fa6e9b1ffbfe6a9cdda9011d | ppc64le | linux | 9 | hotspot | jdk | 190.49 MB | urn:net.adoptopenjdk.raw | production 84bbfca72cbabf04a2fd0e35d0faba03f91977573600edc23714b03aa1ec6fd9 | ppc64le | linux | 9 | hotspot | jre | 36.86 MB | urn:net.adoptopenjdk.raw | production 0510af0db7531eb45bb8723810a10e146a80223cf5b72da077bc41e0e66724e3 | s390x | linux | 9 | hotspot | jre | 38.52 MB | urn:net.adoptopenjdk.raw | production 7bfdc389c25820e08a85eb3a32c4193189f13945847619b14966f7fd45a5c345 | s390x | linux | 9 | hotspot | jdk | 193.60 MB | urn:net.adoptopenjdk.raw | production aa4fc8bda11741facaf3b8537258a4497c6e0046b9f4931e31f713d183b951f1 | x64 | linux | 9 | hotspot | jdk | 207.46 MB | urn:net.adoptopenjdk.raw | production b58848cb7229a1dc2c135dbb85cce56cee33ab29849aa432e2ba26bf8f517dca | x64 | linux | 9 | hotspot | jre | 41.55 MB | urn:net.adoptopenjdk.raw | production b6a14f8dda60528bbb890877b62b7cf6e81bbbe19256bfd38a3ba4390c4eca5e | x64 | linux | 9 | hotspot | jre | 41.53 MB | urn:net.adoptopenjdk.raw | production ebe1eaad73584f70ab4e587ab9367fb15af820745979e68350fe80fadf615df8 | x64 | linux | 9 | hotspot | jdk | 207.33 MB | urn:net.adoptopenjdk.raw | production bbe348baab3cca097b77f7fff6c8465858e642ad42c5851bde33a1553ca12653 | x64 | macos | 9 | hotspot | jdk | 189.34 MB | urn:net.adoptopenjdk.raw | production f92931d258486d77dd986fa0fd2574075569e2f76624822d50bfae01ed72e7e7 | x64 | macos | 9 | hotspot | jre | 35.70 MB | urn:net.adoptopenjdk.raw | production 0373b5be04f98c0077c5b87c2020ecac2fedd36f68e75bbae38d433753506323 | x64 | windows | 9 | hotspot | jre | 36.21 MB | urn:net.adoptopenjdk.raw | production b2de88155b2eaad123c2615f7eb3c0442d77545046bf85cfbcfe44fc97931dbd | x64 | windows | 9 | hotspot | jdk | 192.42 MB | urn:net.adoptopenjdk.raw | production 3bb2faaba9f1a4f6e212ff34c5f2cfb4d5f083c1623cd2ad24108e0bb542e394 | x64 | windows | 9 | hotspot | jre | 36.25 MB | urn:net.adoptopenjdk.raw | production 709baaf217d24503dff3194fd66aa25ae5976b3f52ed3a564cdd270b6f5eef40 | x64 | windows | 9 | hotspot | jdk | 192.27 MB | urn:net.adoptopenjdk.raw | production b66121b9a0c2e7176373e670a499b9d55344bcb326f67140ad6d0dc24d13d3e2 | aarch64 | linux | 11 | hotspot | jdk | 193.39 MB | urn:net.adoptopenjdk.raw | production 0f4edea90e57765562740721d052946408273e9744093266f65c02a7fb26800c | ppc64 | aix | 11 | openj9 | jre | 46.93 MB | urn:net.adoptopenjdk.raw | production eaae79f3a89a6d71f34e9b41cbdfdb14f70988284d9e76427ed705514c614cc3 | ppc64 | aix | 11 | openj9 | jdk | 196.64 MB | urn:net.adoptopenjdk.raw | production 39f97d76a0121f9a2b6e26bc201194921797fcc6c2181871086f09f8bce5862f | ppc64 | aix | 11 | openj9 | jdk | 196.64 MB | urn:net.adoptopenjdk.raw | production 001fd98ca5b5215eac616ed26341052ac1b426d7a55bbca7d28d48137fa9f295 | ppc64 | aix | 11 | openj9 | jdk | 196.65 MB | urn:net.adoptopenjdk.raw | production 43f727ce6bca1ed826181f1a924c9f64a43728e3a222284fd2fbfbe9e4ef199c | ppc64 | aix | 11 | openj9 | jdk | 196.65 MB | urn:net.adoptopenjdk.raw | production 35e36d7a20a773e291b728de5d4977485a0d44a54f1433cdf6e6288c331557ea | ppc64le | linux | 11 | openj9 | jdk | 196.51 MB | urn:net.adoptopenjdk.raw | production 4577350c35f4193430b3ae0094e54869b54aadbc76a50c1518069937a63d54d8 | ppc64le | linux | 11 | openj9 | jdk | 196.52 MB | urn:net.adoptopenjdk.raw | production 747c4613b36f6e86ee4a10848b1a7f009d1bde729acf31bb6350c3cc08a7475d | ppc64le | linux | 11 | openj9 | jre | 41.38 MB | urn:net.adoptopenjdk.raw | production fcc9a2b183a9238e1927d6088d7c99031f517d62026e8b33d02dfd883b1ca95e | ppc64le | linux | 11 | openj9 | jdk | 196.55 MB | urn:net.adoptopenjdk.raw | production c18364a778b1b990e8e62d094377af48b000f9f6a64ec21baff6a032af06386d | ppc64le | linux | 11 | hotspot | jdk | 179.52 MB | urn:net.adoptopenjdk.raw | production fb3f4ddaf3e2a9490e34b385e00d76cf6142806d47bd619ef7c193c12acfbb01 | s390x | linux | 11 | openj9 | jdk | 197.27 MB | urn:net.adoptopenjdk.raw | production 249ad469735c42fa80fcf4123bc76f7e398ff3349ce6fb4bfa65a850fb70f6f8 | s390x | linux | 11 | openj9 | jdk | 197.27 MB | urn:net.adoptopenjdk.raw | production 119bd9d9faf1bb596b9ca74740f12cc23c20fe9331d312f1c2b59eb15a76625f | x32 | windows | 11 | hotspot | jdk | 174.24 MB | urn:net.adoptopenjdk.raw | production 0b6050cc670eefd9465370ab19ae70401476430fca329e65f0dd636ca9cce9bd | x64 | linux | 11 | openj9 | jdk | 195.41 MB | urn:net.adoptopenjdk.raw | large-heap production ef9bf07cba79082285a9d426ea4eb3e8df57561ce2afe07cc5f299a8fa203279 | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 10b2400add0070b64db91026f12b798708e59772a81492fd2b638638f71ed14f | x64 | linux | 11 | hotspot | jdk | 186.61 MB | urn:net.java.jdk | early-access valhalla cac1fe096ea161613d5afe8a04ce3294dc1b535f5f4ea1a4235ce425b2610678 | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production 765947ab9457a29d2aa9d11460a4849611343c1e0ea3b33b9c08409cd4672251 | x64 | linux | 11 | openj9 | jdk | 195.50 MB | urn:net.adoptopenjdk.raw | production e0446e80eeb90ab97fd59f91ae094bdd658c354943d4e33e0ddf691714f9da4d | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 518e9330f2aeb020bca31a07034a08c3a568823e703fc503e03206acdad9dae5 | x64 | linux | 11 | openj9 | jre | 40.91 MB | urn:net.adoptopenjdk.raw | large-heap production 9306fa569d2d5abf982df0b4ffa5d30c652cf16139d7b2268db30d2886f3adbf | x64 | linux | 11 | openj9 | jdk | 195.42 MB | urn:net.adoptopenjdk.raw | large-heap production 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production a016413fd8415429b42e543fed7a1bee5010b1dbaf71d29a26e1c699f334c6ff | x64 | linux | 11 | openj9 | jre | 40.96 MB | urn:net.adoptopenjdk.raw | production 11cb48e3592f46f2c2dab095e3b9a4fec60b89199827f2b737a14b54dc5fd68d | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production c5e9b588b4ac5b0bd5b4edd69d59265d1199bb98af7ca3270e119b264ffb6e3f | x64 | macos | 11 | openj9 | jdk | 180.99 MB | urn:net.adoptopenjdk.raw | production 0901dc5946fdf967f92f7b719ddfffdcdde5bd3fef86a83d7a3f2f39ddbef1f8 | x64 | macos | 11 | openj9 | jre | 38.63 MB | urn:net.adoptopenjdk.raw | production 92494f79cc296625778a50d04816aabedca9cd9666b7bab8f1c3b96f06c82f97 | x64 | macos | 11 | hotspot | jdk | 180.75 MB | urn:net.java.jdk | early-access valhalla c9a816d6a3f8aac9dc5b3b41c5a9e4e5460af433a06e003ae25d5a06dea8375f | x64 | macos | 11 | openj9 | jdk | 180.95 MB | urn:net.adoptopenjdk.raw | production 67785f46b264f7a91358cea41e4f7e0880685175a2a18f1f3890828a577fe067 | x64 | macos | 11 | openj9 | jdk | 180.95 MB | urn:net.adoptopenjdk.raw | production e219e7e2d586ed09ae65f4ec390fca5d5f0c37a61b47677648610194daf1aaa7 | x64 | macos | 11 | hotspot | jdk | 189.91 MB | urn:net.adoptopenjdk.raw | production f34ced35547e53dd400c1ee99a63d8bf68e45370bc7b098e32f0b7107a60e00b | x64 | macos | 11 | openj9 | jdk | 181.00 MB | urn:net.adoptopenjdk.raw | production b8960753a66190fa81982682357a2449b4183f3e23c20a5e3b4cf01e2989846b | x64 | macos | 11 | openj9 | jdk | 181.00 MB | urn:net.adoptopenjdk.raw | production ef7c411c3b3e06f93874b15b598c36020b192a1a3096c5d9d5eae7799f8bcd49 | x64 | windows | 11 | openj9 | jdk | 196.96 MB | urn:net.adoptopenjdk.raw | production d104c7337ff3cd03fb37d048860192a3de5cbab4b158a681bc20cc521b6da954 | x64 | windows | 11 | openj9 | jdk | 196.90 MB | urn:net.adoptopenjdk.raw | production b1eb84f5bfce03058f266d7303ad02fcf4d6f2b05c989989ae7b0bd5a663a5a7 | x64 | windows | 11 | hotspot | jdk | 192.97 MB | urn:net.adoptopenjdk.raw | production 106c242e946a74ba71ff22b5a980c375b7cd13fd4550fb3698333e06a1f33243 | x64 | windows | 11 | hotspot | jdk | 180.82 MB | urn:net.java.jdk | early-access valhalla d33551f15f8d4bc5f97471bca669872665e5db15cc8a5ac88f068e23f56bb129 | x64 | windows | 11 | openj9 | jre | 40.06 MB | urn:net.adoptopenjdk.raw | production 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production fa07eee08fa0f3de541ee1770de0cdca2ae3876f3bd78c329f27e85c287cd070 | x64 | macos | 11.0.1 | hotspot | jdk | 182.09 MB | urn:net.java.jdk | production 289dd06e06c2cbd5e191f2d227c9338e88b6963fd0c75bceb9be48f0394ede21 | x64 | windows | 11.0.1 | hotspot | jdk | 187.42 MB | urn:net.java.jdk | production 33a5f5b063dde3a66a98cf691bd00b21c012950ae1af253e19dcc68d74a75f65 | x64 | linux | 12 | hotspot | jdk | 304.88 MB | urn:net.java.jdk | early-access panama 95a033710ed71962c33b226afdbb222442bf0098ea3705448f0d14f0b3044bab | x64 | macos | 12 | hotspot | jdk | 233.21 MB | urn:net.java.jdk | early-access panama
As can be seen, there are currently rather a lot of runtimes. We can start narrowing down the runtimes that we want by passing in search parameters. Searching is provided by the API directly and the API for this is believed to be stable, however the syntax for the shell is currently subject to change and may even be outdated by the time you read this. Let's limit ourselves to Linux runtimes:
[coffeepick]$ catalog platform:linux ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags 8eee0aede947b804f9a5f49c8a38b52aace8a30a9ebd9383b7d06042fb5a237c | aarch64 | linux | 8 | hotspot | jdk | 75.38 MB | urn:net.adoptopenjdk.raw | production b0b3923a48243fa98b71c7fd8ff96def453e07b33156e90cb6851b7b7cacd4b1 | aarch64 | linux | 8 | hotspot | jre | 39.53 MB | urn:net.adoptopenjdk.raw | production af2532a428fbeb6e6896279a874a3d4b574b74a6ebeae16e4771d7ad517f653a | ppc64le | linux | 8 | openj9 | jdk | 89.53 MB | urn:net.adoptopenjdk.raw | production e7fd779a6448259641565ca31f258d11052c9997e762bc63bbaa2b5776de98f1 | ppc64le | linux | 8 | openj9 | jre | 48.62 MB | urn:net.adoptopenjdk.raw | production b092f4e6553a7c50872b0963f4de2b3a2bce78ce11d1bf1905a2ad5a6576924b | s390x | linux | 8 | openj9 | jdk | 90.37 MB | urn:net.adoptopenjdk.raw | production fd7035c60ad3060fccf7ab67c15b722302a1863ebddd3141dc3dd98bd0b25a68 | x64 | linux | 8 | openj9 | jdk | 90.24 MB | urn:net.adoptopenjdk.raw | production f0bc82fa49a2a02e881d403170cd8b273fc3d1585a4e65ff639666f056ce7362 | x64 | linux | 8 | openj9 | jdk | 90.12 MB | urn:net.adoptopenjdk.raw | large-heap production d1ee522053bb4135536b1d3173be8224bf54563d166e882b7ee2ccf609c2517f | aarch64 | linux | 9 | hotspot | jdk | 190.65 MB | urn:net.adoptopenjdk.raw | production 36e4955c0fec6ff6494c5274e6950fdd45e73b11ebe97efdcb9768e07981f626 | aarch64 | linux | 9 | hotspot | jre | 37.12 MB | urn:net.adoptopenjdk.raw | production 359c65179f839c5ba0959710803c556c3ce2046dcb0762f2165595706b9b8272 | ppc64le | linux | 9 | hotspot | jre | 36.84 MB | urn:net.adoptopenjdk.raw | production bd4736feea702c859102bb78145fe3c7dbf6774ce1d66d00a9fc582d6bbeb564 | ppc64le | linux | 9 | hotspot | jdk | 190.36 MB | urn:net.adoptopenjdk.raw | production 6382fe043c0ef1cf5b38cf3f70cc300bbdd66f16fa6e9b1ffbfe6a9cdda9011d | ppc64le | linux | 9 | hotspot | jdk | 190.49 MB | urn:net.adoptopenjdk.raw | production 84bbfca72cbabf04a2fd0e35d0faba03f91977573600edc23714b03aa1ec6fd9 | ppc64le | linux | 9 | hotspot | jre | 36.86 MB | urn:net.adoptopenjdk.raw | production 0510af0db7531eb45bb8723810a10e146a80223cf5b72da077bc41e0e66724e3 | s390x | linux | 9 | hotspot | jre | 38.52 MB | urn:net.adoptopenjdk.raw | production 7bfdc389c25820e08a85eb3a32c4193189f13945847619b14966f7fd45a5c345 | s390x | linux | 9 | hotspot | jdk | 193.60 MB | urn:net.adoptopenjdk.raw | production aa4fc8bda11741facaf3b8537258a4497c6e0046b9f4931e31f713d183b951f1 | x64 | linux | 9 | hotspot | jdk | 207.46 MB | urn:net.adoptopenjdk.raw | production ebe1eaad73584f70ab4e587ab9367fb15af820745979e68350fe80fadf615df8 | x64 | linux | 9 | hotspot | jdk | 207.33 MB | urn:net.adoptopenjdk.raw | production b58848cb7229a1dc2c135dbb85cce56cee33ab29849aa432e2ba26bf8f517dca | x64 | linux | 9 | hotspot | jre | 41.55 MB | urn:net.adoptopenjdk.raw | production b6a14f8dda60528bbb890877b62b7cf6e81bbbe19256bfd38a3ba4390c4eca5e | x64 | linux | 9 | hotspot | jre | 41.53 MB | urn:net.adoptopenjdk.raw | production b66121b9a0c2e7176373e670a499b9d55344bcb326f67140ad6d0dc24d13d3e2 | aarch64 | linux | 11 | hotspot | jdk | 193.39 MB | urn:net.adoptopenjdk.raw | production 35e36d7a20a773e291b728de5d4977485a0d44a54f1433cdf6e6288c331557ea | ppc64le | linux | 11 | openj9 | jdk | 196.51 MB | urn:net.adoptopenjdk.raw | production 4577350c35f4193430b3ae0094e54869b54aadbc76a50c1518069937a63d54d8 | ppc64le | linux | 11 | openj9 | jdk | 196.52 MB | urn:net.adoptopenjdk.raw | production 747c4613b36f6e86ee4a10848b1a7f009d1bde729acf31bb6350c3cc08a7475d | ppc64le | linux | 11 | openj9 | jre | 41.38 MB | urn:net.adoptopenjdk.raw | production fcc9a2b183a9238e1927d6088d7c99031f517d62026e8b33d02dfd883b1ca95e | ppc64le | linux | 11 | openj9 | jdk | 196.55 MB | urn:net.adoptopenjdk.raw | production c18364a778b1b990e8e62d094377af48b000f9f6a64ec21baff6a032af06386d | ppc64le | linux | 11 | hotspot | jdk | 179.52 MB | urn:net.adoptopenjdk.raw | production fb3f4ddaf3e2a9490e34b385e00d76cf6142806d47bd619ef7c193c12acfbb01 | s390x | linux | 11 | openj9 | jdk | 197.27 MB | urn:net.adoptopenjdk.raw | production 249ad469735c42fa80fcf4123bc76f7e398ff3349ce6fb4bfa65a850fb70f6f8 | s390x | linux | 11 | openj9 | jdk | 197.27 MB | urn:net.adoptopenjdk.raw | production e0446e80eeb90ab97fd59f91ae094bdd658c354943d4e33e0ddf691714f9da4d | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 0b6050cc670eefd9465370ab19ae70401476430fca329e65f0dd636ca9cce9bd | x64 | linux | 11 | openj9 | jdk | 195.41 MB | urn:net.adoptopenjdk.raw | large-heap production 518e9330f2aeb020bca31a07034a08c3a568823e703fc503e03206acdad9dae5 | x64 | linux | 11 | openj9 | jre | 40.91 MB | urn:net.adoptopenjdk.raw | large-heap production 9306fa569d2d5abf982df0b4ffa5d30c652cf16139d7b2268db30d2886f3adbf | x64 | linux | 11 | openj9 | jdk | 195.42 MB | urn:net.adoptopenjdk.raw | large-heap production 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production a016413fd8415429b42e543fed7a1bee5010b1dbaf71d29a26e1c699f334c6ff | x64 | linux | 11 | openj9 | jre | 40.96 MB | urn:net.adoptopenjdk.raw | production ef9bf07cba79082285a9d426ea4eb3e8df57561ce2afe07cc5f299a8fa203279 | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 10b2400add0070b64db91026f12b798708e59772a81492fd2b638638f71ed14f | x64 | linux | 11 | hotspot | jdk | 186.61 MB | urn:net.java.jdk | early-access valhalla 11cb48e3592f46f2c2dab095e3b9a4fec60b89199827f2b737a14b54dc5fd68d | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production cac1fe096ea161613d5afe8a04ce3294dc1b535f5f4ea1a4235ce425b2610678 | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production 765947ab9457a29d2aa9d11460a4849611343c1e0ea3b33b9c08409cd4672251 | x64 | linux | 11 | openj9 | jdk | 195.50 MB | urn:net.adoptopenjdk.raw | production 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production 33a5f5b063dde3a66a98cf691bd00b21c012950ae1af253e19dcc68d74a75f65 | x64 | linux | 12 | hotspot | jdk | 304.88 MB | urn:net.java.jdk | early-access panama
That narrows things down a little, but there are still far too many
matching runtimes. Let's specify that we want Linux, x86_64 (the
CoffeePick API refers to 32-bit x86 as x32 and 64-bit x86 as x64
for uniformity), and let's specify a version range that says that we
want any version of Java greater than or equal to 11 but less than
12:
[coffeepick]$ catalog platform:linux arch:x64 version:[11,12) ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags e0446e80eeb90ab97fd59f91ae094bdd658c354943d4e33e0ddf691714f9da4d | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production a016413fd8415429b42e543fed7a1bee5010b1dbaf71d29a26e1c699f334c6ff | x64 | linux | 11 | openj9 | jre | 40.96 MB | urn:net.adoptopenjdk.raw | production ef9bf07cba79082285a9d426ea4eb3e8df57561ce2afe07cc5f299a8fa203279 | x64 | linux | 11 | openj9 | jdk | 195.55 MB | urn:net.adoptopenjdk.raw | production 10b2400add0070b64db91026f12b798708e59772a81492fd2b638638f71ed14f | x64 | linux | 11 | hotspot | jdk | 186.61 MB | urn:net.java.jdk | early-access valhalla 0b6050cc670eefd9465370ab19ae70401476430fca329e65f0dd636ca9cce9bd | x64 | linux | 11 | openj9 | jdk | 195.41 MB | urn:net.adoptopenjdk.raw | large-heap production 11cb48e3592f46f2c2dab095e3b9a4fec60b89199827f2b737a14b54dc5fd68d | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production cac1fe096ea161613d5afe8a04ce3294dc1b535f5f4ea1a4235ce425b2610678 | x64 | linux | 11 | openj9 | jdk | 195.36 MB | urn:net.adoptopenjdk.raw | large-heap production 518e9330f2aeb020bca31a07034a08c3a568823e703fc503e03206acdad9dae5 | x64 | linux | 11 | openj9 | jre | 40.91 MB | urn:net.adoptopenjdk.raw | large-heap production 9306fa569d2d5abf982df0b4ffa5d30c652cf16139d7b2268db30d2886f3adbf | x64 | linux | 11 | openj9 | jdk | 195.42 MB | urn:net.adoptopenjdk.raw | large-heap production 765947ab9457a29d2aa9d11460a4849611343c1e0ea3b33b9c08409cd4672251 | x64 | linux | 11 | openj9 | jdk | 195.50 MB | urn:net.adoptopenjdk.raw | production 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production
We are making progress. Let's assume, for the sake of this example, that we know our application isn't compatible with OpenJ9. We can require that the VM implementation be Hotspot:
[coffeepick]$ catalog platform:linux arch:x64 version:[11,12) vm:hotspot ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production 10b2400add0070b64db91026f12b798708e59772a81492fd2b638638f71ed14f | x64 | linux | 11 | hotspot | jdk | 186.61 MB | urn:net.java.jdk | early-access valhalla 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production
Let's also assume that we're only interested in builds that are
production-ready. The CoffeePick API allows for repositories to
provide arbitrary tags to builds in order to further distinguish
them beyond the standard metadata defined by the API. The convention
is to tag production-ready builds with the production tag, so let's
list builds that have that tag:
[coffeepick]$ catalog platform:linux arch:x64 version:[11,12) vm:hotspot require-tag:production ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production
We've narrowed it down to two builds. We can see from the Repository
column that one of those builds comes from the jdk.java.net repository
and the other comes from AdoptOpenJDK. Let's arbitrarily decide that we
want the one from jdk.java.net and download it:
[coffeepick]$ download 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd [ 2.10 MB / 187.60 MB] |+ | 2.10MB/s [ 4.20 MB / 187.60 MB] |++ | 2.10MB/s [ 7.72 MB / 187.60 MB] |+++ | 3.52MB/s [ 10.49 MB / 187.60 MB] |++++ | 2.77MB/s [ 12.60 MB / 187.60 MB] |+++++ | 2.11MB/s (Time passes...) [ 178.69 MB / 187.60 MB] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | 2.35MB/s [ 180.67 MB / 187.60 MB] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | 1.98MB/s [ 182.67 MB / 187.60 MB] |+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | 2.00MB/s [ 184.81 MB / 187.60 MB] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++| 2.14MB/s [ 187.15 MB / 187.60 MB] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++| 2.34MB/s Download finished Runtime archive: /home/rm/local/coffeepick/inventory/7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd/archive
For safety reasons, the CoffeePick API automatically verifies that the downloaded
archive matches the published checksum. This should provide a minimum level of
confidence that you actually downloaded the right runtime, and that the runtime
made it onto the disk without malicious or accidental modification. It's possible
to manually verify an already-downloaded runtime at any time in the future
with the verify command:
[coffeepick]$ verify 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd Verified: Algorithm: SHA-256 Received: 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd
Now that the runtime has been downloaded, it will appear in the inventory. In the CoffeePick API, the inventory is the set of runtimes that you currently have downloaded. The inventory command lists the downloaded runtimes and supports all of the same search parameters as the catalog command:
[coffeepick]$ inventory ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 | x64 | linux | 11 | hotspot | jdk | 195.71 MB | urn:net.adoptopenjdk.raw | production a016413fd8415429b42e543fed7a1bee5010b1dbaf71d29a26e1c699f334c6ff | x64 | linux | 11 | openj9 | jre | 40.96 MB | urn:net.adoptopenjdk.raw | production d33551f15f8d4bc5f97471bca669872665e5db15cc8a5ac88f068e23f56bb129 | x64 | windows | 11 | openj9 | jre | 40.06 MB | urn:net.adoptopenjdk.raw | production 7a6bb980b9c91c478421f865087ad2d69086a0583aeeb9e69204785e8e97dcfd | x64 | linux | 11.0.1 | hotspot | jdk | 187.60 MB | urn:net.java.jdk | production [coffeepick]$ inventory vm:openj9 ID | Arch | Platform | Version | VM | Conf | Size | Repository | Tags a016413fd8415429b42e543fed7a1bee5010b1dbaf71d29a26e1c699f334c6ff | x64 | linux | 11 | openj9 | jre | 40.96 MB | urn:net.adoptopenjdk.raw | production d33551f15f8d4bc5f97471bca669872665e5db15cc8a5ac88f068e23f56bb129 | x64 | windows | 11 | openj9 | jre | 40.06 MB | urn:net.adoptopenjdk.raw | production
Of course, a runtime isn't much use sitting there in the on-disk storage area. The unpack command unpacks a downloaded runtime into a user-specified directory:
[coffeepick]$ unpack --output /tmp/jdk11-linux-x64 --strip-leading-directory 7e9904e1bfa197e6e72570207cb2bd63dd7cc4bf5f97bc5454c1fc5a559a8bf1 [coffeepick]$
Now, in an ordinary shell:
$ ls -alF /tmp/jdk11-linux-x64/ total 4 drwxr-xr-x 10 rm rm 220 2018-11-18 14:23 ./ drwxrwxrwt 198 root root 4420 2018-11-18 14:23 ../ drwxr-xr-x 2 rm rm 680 2018-11-18 14:23 bin/ drwxr-xr-x 4 rm rm 140 2018-11-18 14:23 conf/ drwxr-xr-x 4 rm rm 100 2018-11-18 14:23 demo/ drwxr-xr-x 3 rm rm 180 2018-11-18 14:23 include/ drwxr-xr-x 2 rm rm 1440 2018-11-18 14:23 jmods/ drwxr-xr-x 72 rm rm 1440 2018-11-18 14:23 legal/ drwxr-xr-x 6 rm rm 1040 2018-11-18 14:23 lib/ drwxr-xr-x 4 rm rm 100 2018-11-18 14:23 man/ -rw-r--r-- 1 rm rm 1202 2018-11-18 14:23 release $ cat /tmp/jdk11-linux-x64/release IMPLEMENTOR="AdoptOpenJDK" IMPLEMENTOR_VERSION="AdoptOpenJDK" JAVA_VERSION="11.0.1" JAVA_VERSION_DATE="2018-10-16" MODULES="java.base java.compiler java.datatransfer java.xml java.prefs java.desktop java.instrument java.logging java.management java.security.sasl java.naming java.rmi java.management.rmi java.net.http java.scripting java.security.jgss java.transaction.xa java.sql java.sql.rowset java.xml.crypto java.se java.smartcardio jdk.accessibility jdk.internal.vm.ci jdk.management jdk.unsupported jdk.internal.vm.compiler jdk.aot jdk.internal.jvmstat jdk.attach jdk.charsets jdk.compiler jdk.crypto.ec jdk.crypto.cryptoki jdk.dynalink jdk.internal.ed jdk.editpad jdk.hotspot.agent jdk.httpserver jdk.internal.le jdk.internal.opt jdk.internal.vm.compiler.management jdk.jartool jdk.javadoc jdk.jcmd jdk.management.agent jdk.jconsole jdk.jdeps jdk.jdwp.agent jdk.jdi jdk.jfr jdk.jlink jdk.jshell jdk.jsobject jdk.jstatd jdk.localedata jdk.management.jfr jdk.naming.dns jdk.naming.rmi jdk.net jdk.pack jdk.rmic jdk.scripting.nashorn jdk.scripting.nashorn.shell jdk.sctp jdk.security.auth jdk.security.jgss jdk.unsupported.desktop jdk.xml.dom jdk.zipfs" OS_ARCH="x86_64" OS_NAME="Linux" SOURCE=""
Finally, it's possible tell repository providers to self-update. This is useful in the case of a repository such as AdoptOpenJDK where new runtime builds are published frequently.
$ repository-update urn:net.adoptopenjdk.raw Update of urn:net.adoptopenjdk.raw started… [ 0.00 % ] | | [ 1.79 % ] |++ | [ 3.57 % ] |+++ | [ 5.36 % ] |++++ | [ 7.14 % ] |+++++ | (Time passes...) [ 91.07 % ] |+++++++++++++++++++++++++++++++++++++++++++++++++++++++ | [ 92.86 % ] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | [ 94.64 % ] |+++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | [ 96.43 % ] |++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | [ 98.21 % ] |+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ | Update of urn:net.adoptopenjdk.raw finished.
Subsequent executions of the catalog command will then show new releases
(if any are available) in addition to those that were already available.
Future directions for the project:
A Maven plugin
I want to be able to do all of the above in an automated manner during builds. The API already allows for electively downloading or reusing cached runtimes, and runtimes can be specified directly by hash value for reproducibility in builds.
Add shipilev.net builds
Aleksey Shipilëv publishes various early-access builds so that people can try out new JDK features. I'd like to get his builds included into a repository provider (ideally with some way to find new builds without having to crawl over his entire site to discover them).
A standard schema for repository metadata
I already have a very strict XSD schema that describes a format for repository metadata. It would just be a matter of persuading others to use it, and allowing the API to consume XML metadata.