Reloading jars on a running http server.

On Tue, Apr 20, 2021 at 6:44 PM Reece Dunn <msclrhd at googlemail.com> wrote: > > Hi all, > > I'm working on a Java class that I'm importing into an XQuery, so I can do additional processing on the data that isn't easily expressible in XQuery (or XSLT). In order to get BaseX to pick up a modified version of the jar file I'm building, I'm restarting the BaseX http server. > > This makes it slower to turn around testing the changes. Is there a better way of doing this? > > Kind regards, > Reece

On Wed, 21 Apr 2021 at 18:49, Christian Grün <christian.gruen at gmail.com> wrote: > Hi Reece, > > If you install your Java code as JAR file in the repository [1], the > code will be loaded and unloaded every time when your query is > executed. If you get an error message… > > java.lang.reflect.InaccessibleObjectException: Unable to make field > private final jdk.internal.loader.URLClassPath > java.net.URLClassLoader.ucp accessible: module java.base does not > "opens java.net" to unnamed module @79e2c065 > > …unloading fails [2], as you’re probably using a more recent version > of the JDK, which restricts reflective access to internal variables. > You can get around this by adding Java flags at startup time: > > --add-opens java.base/java.net=ALL-UNNAMED > --add-opens java.base/jdk.internal.loader=ALL-UNNAMED > > Maybe there are better solutions to unload JAR files today. > Suggestions are welcome! > > Hope this helps, > Christian > > [1] https://docs.basex.org/wiki/Repository#Java > [2] > https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/util/JarLoader.java#L34 > > > > On Tue, Apr 20, 2021 at 6:44 PM Reece Dunn <msclrhd at googlemail.com> wrote: > > > > Hi all, > > > > I'm working on a Java class that I'm importing into an XQuery, so I can > do additional processing on the data that isn't easily expressible in > XQuery (or XSLT). In order to get BaseX to pick up a modified version of > the jar file I'm building, I'm restarting the BaseX http server. > > > > This makes it slower to turn around testing the changes. Is there a > better way of doing this? > > > > Kind regards, > > Reece >

On Thu, Apr 29, 2021 at 9:48 PM Reece Dunn <msclrhd at googlemail.com> wrote: > > Hi Christian, > > Thanks for the response. Unfortunately, I've not been able to get the reloading working. > > Kind regards, > Reece > > On Wed, 21 Apr 2021 at 18:49, Christian Grün <christian.gruen at gmail.com> wrote: >> >> Hi Reece, >> >> If you install your Java code as JAR file in the repository [1], the >> code will be loaded and unloaded every time when your query is >> executed. If you get an error message… >> >> java.lang.reflect.InaccessibleObjectException: Unable to make field >> private final jdk.internal.loader.URLClassPath >> java.net.URLClassLoader.ucp accessible: module java.base does not >> "opens java.net" to unnamed module @79e2c065 >> >> …unloading fails [2], as you’re probably using a more recent version >> of the JDK, which restricts reflective access to internal variables. >> You can get around this by adding Java flags at startup time: >> >> --add-opens java.base/java.net=ALL-UNNAMED >> --add-opens java.base/jdk.internal.loader=ALL-UNNAMED >> >> Maybe there are better solutions to unload JAR files today. >> Suggestions are welcome! >> >> Hope this helps, >> Christian >> >> [1] https://docs.basex.org/wiki/Repository#Java >> [2] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/util/JarLoader.java#L34 >> >> >> >> On Tue, Apr 20, 2021 at 6:44 PM Reece Dunn <msclrhd at googlemail.com> wrote: >> > >> > Hi all, >> > >> > I'm working on a Java class that I'm importing into an XQuery, so I can do additional processing on the data that isn't easily expressible in XQuery (or XSLT). In order to get BaseX to pick up a modified version of the jar file I'm building, I'm restarting the BaseX http server. >> > >> > This makes it slower to turn around testing the changes. Is there a better way of doing this? >> > >> > Kind regards, >> > Reece

On Fri, 30 Apr 2021 at 07:48, Christian Grün <christian.gruen at gmail.com> wrote: > Hi Reece, > > I’m sorry to hear that. Did you build a custom JAR file, or do you > encounter problems with the JDK? > > Cheers, > Christian > > > > On Thu, Apr 29, 2021 at 9:48 PM Reece Dunn <msclrhd at googlemail.com> wrote: > > > > Hi Christian, > > > > Thanks for the response. Unfortunately, I've not been able to get the > reloading working. > > > > Kind regards, > > Reece > > > > On Wed, 21 Apr 2021 at 18:49, Christian Grün <christian.gruen at gmail.com> > wrote: > >> > >> Hi Reece, > >> > >> If you install your Java code as JAR file in the repository [1], the > >> code will be loaded and unloaded every time when your query is > >> executed. If you get an error message… > >> > >> java.lang.reflect.InaccessibleObjectException: Unable to make field > >> private final jdk.internal.loader.URLClassPath > >> java.net.URLClassLoader.ucp accessible: module java.base does not > >> "opens java.net" to unnamed module @79e2c065 > >> > >> …unloading fails [2], as you’re probably using a more recent version > >> of the JDK, which restricts reflective access to internal variables. > >> You can get around this by adding Java flags at startup time: > >> > >> --add-opens java.base/java.net=ALL-UNNAMED > >> --add-opens java.base/jdk.internal.loader=ALL-UNNAMED > >> > >> Maybe there are better solutions to unload JAR files today. > >> Suggestions are welcome! > >> > >> Hope this helps, > >> Christian > >> > >> [1] https://docs.basex.org/wiki/Repository#Java > >> [2] > https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/util/JarLoader.java#L34 > >> > >> > >> > >> On Tue, Apr 20, 2021 at 6:44 PM Reece Dunn <msclrhd at googlemail.com> > wrote: > >> > > >> > Hi all, > >> > > >> > I'm working on a Java class that I'm importing into an XQuery, so I > can do additional processing on the data that isn't easily expressible in > XQuery (or XSLT). In order to get BaseX to pick up a modified version of > the jar file I'm building, I'm restarting the BaseX http server. > >> > > >> > This makes it slower to turn around testing the changes. Is there a > better way of doing this? > >> > > >> > Kind regards, > >> > Reece >

> You'll need to copy the kotlin-stdlib-1.4.32.jar file in addition to the test.jar file to BaseX's lib directory.

On Fri, Apr 30, 2021 at 9:14 AM Reece Dunn <msclrhd at googlemail.com> wrote: > > Hi Christian, > > I'm not seeing any exceptions in the console window, even when enabling the debug setting. I'm using the AdoptOpenJDK 1.8. I also have AdoptOpenJDK 11, but I assume that will have the issue you described. > > It's a custom-built jar using Kotlin, built via gradle. > > One thing that it could be is that I'm using Kotlin objects (not classes), e.g.: > > package test > object Test { fun f(): String = "test" } > > and using it like: > > declare namespace Test = "java:test.Test"; > > declare function test:f() as xs:string { > Test::f(Test::INSTANCE()) > }; > > The build.gradle file is simple. It looks something like this (removing things like the junit configuration): > > ----- > buildscript { > ext.kotlin_version = "1.4.32" > ext.kotlin_stdlib = "kotlin-stdlib" > ext.java_version = "1.8" > > repositories { mavenCentral() } > dependencies { classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version" } > } > > apply plugin: 'kotlin' > > repositories { > mavenCentral() > mavenLocal() > } > > compileKotlin { kotlinOptions { jvmTarget = java_version } } > compileTestKotlin { kotlinOptions { jvmTarget = java_version } } > > dependencies { > implementation "org.jetbrains.kotlin:$kotlin_stdlib:$kotlin_version" > } > ----- > > You'll need to copy the kotlin-stdlib-1.4.32.jar file in addition to the test.jar file to BaseX's lib directory. > > Kind regards, > Reece > > On Fri, 30 Apr 2021 at 07:48, Christian Grün <christian.gruen at gmail.com> wrote: >> >> Hi Reece, >> >> I’m sorry to hear that. Did you build a custom JAR file, or do you >> encounter problems with the JDK? >> >> Cheers, >> Christian >> >> >> >> On Thu, Apr 29, 2021 at 9:48 PM Reece Dunn <msclrhd at googlemail.com> wrote: >> > >> > Hi Christian, >> > >> > Thanks for the response. Unfortunately, I've not been able to get the reloading working. >> > >> > Kind regards, >> > Reece >> > >> > On Wed, 21 Apr 2021 at 18:49, Christian Grün <christian.gruen at gmail.com> wrote: >> >> >> >> Hi Reece, >> >> >> >> If you install your Java code as JAR file in the repository [1], the >> >> code will be loaded and unloaded every time when your query is >> >> executed. If you get an error message… >> >> >> >> java.lang.reflect.InaccessibleObjectException: Unable to make field >> >> private final jdk.internal.loader.URLClassPath >> >> java.net.URLClassLoader.ucp accessible: module java.base does not >> >> "opens java.net" to unnamed module @79e2c065 >> >> >> >> …unloading fails [2], as you’re probably using a more recent version >> >> of the JDK, which restricts reflective access to internal variables. >> >> You can get around this by adding Java flags at startup time: >> >> >> >> --add-opens java.base/java.net=ALL-UNNAMED >> >> --add-opens java.base/jdk.internal.loader=ALL-UNNAMED >> >> >> >> Maybe there are better solutions to unload JAR files today. >> >> Suggestions are welcome! >> >> >> >> Hope this helps, >> >> Christian >> >> >> >> [1] https://docs.basex.org/wiki/Repository#Java >> >> [2] https://github.com/BaseXdb/basex/blob/master/basex-core/src/main/java/org/basex/util/JarLoader.java#L34 >> >> >> >> >> >> >> >> On Tue, Apr 20, 2021 at 6:44 PM Reece Dunn <msclrhd at googlemail.com> wrote: >> >> > >> >> > Hi all, >> >> > >> >> > I'm working on a Java class that I'm importing into an XQuery, so I can do additional processing on the data that isn't easily expressible in XQuery (or XSLT). In order to get BaseX to pick up a modified version of the jar file I'm building, I'm restarting the BaseX http server. >> >> > >> >> > This makes it slower to turn around testing the changes. Is there a better way of doing this? >> >> > >> >> > Kind regards, >> >> > Reece