xmlbeans-maven-plugin not generating getters for Lists - maven

I'm currently trying to build a legacy project which has been migrated from Ant to Maven. This project uses the xmlbeans-maven-plugin to build java classes from .xsd source files. Everything works fine until a get...List() method gets called. All List-getters seem to be missing. All the information I could find points to a Java version being used that does not support Lists. The solution that worked for most people was changing the javaSource tag in the plugin configuration to 1.5. This did not solve my problem.
The relevant part of my pom.xml currently looks like this:
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>xmlbeans-maven-plugin</artifactId>
<version>2.3.3</version>
<executions>
<execution>
<phase>generate-sources</phase>
<goals>
<goal>xmlbeans</goal>
</goals>
</execution>
</executions>
<configuration>
<javaSource>1.8</javaSource>
<schemaDirectory>src/main/xsd</schemaDirectory>
</configuration>
</plugin>
Another stackoverflow thread (Maven2:List return type methods not getting generated from .xsd files while using xmlbeans plugin), from 2011 mind you, suggests to set the Java version to 1.5 instead. This gives me another error:
Failed to execute goal org.codehaus.mojo:xmlbeans-maven-plugin:2.3.3:xmlbeans (default) on project ...: XmlBeans compile failed:
xml ErrorLoading schema file ...
xml ErrorLoading schema file ...
xml ErrorLoading schema file ...
xml ErrorLoading schema file ...
xml ErrorLoading schema file ...
The solution for this problem I found here tells me this is a problem with Java 11 and that I should set the Java version to 1.8.
Here's a snippet of one of the .xsd files:
<xs:element name="DbcFile" minOccurs="0" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="name" type="xs:string" />
<xs:element name="path" type="xs:string" />
</xs:sequence>
</xs:complexType>
</xs:element>
This should generate a method called getDbcFileList(). However, as you can see from this error message, it does not do that:
... cannot find symbol
symbol: method getDbcFileList()
It does generate getDbcFileArray(). I have tried a lot of combinations of changing Java versions, removing the build folder every time to get a clean build, you name it. I'm honestly out of ideas.
I'm using Maven 3.6.3 and OpenJDK 13.0.2+8_2. I'm running maven commands from IntelliJ 2020.1. The only thing I haven't tried is downgrading my JDK, but I feel like that won't make a difference.

I solved it. The solution was to downgrade to JDK 1.8, for some reason.

I got this error when upgrading from JDK 1.8 to JDK 11. The xmlbeans-maven-plugin is old but if you have to stick with it then the solution is to add following attributes to <configuration> section for the plugin in pom.xml:
<noJavac>true</noJavac>
<javaSource>1.6</javaSource>
The author was close to solution but <javaSource> attribute alone is not enough. Setting <noJavac> prevents xmlbeans from calling compilation with argument "-source" pointing to possibly no longer supported Java versions, in my case 1.4.
I see the OP linked the thread where I found solution, but back then the part about javac was missing: https://github.com/ethercis/openehr-java-libs/issues/1#issuecomment-880253566.

Related

maven error "Property ${samedir} has not been set"

How to fix the maven checkstyle plugin error
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.1.2:check (validate) on project yourproject:
Failed during checkstyle execution:
Failed during checkstyle configuration: unable to parse configuration stream:
com.puppycrawl.tools.checkstyle.api.CheckstyleException:
Property ${samedir} has not been set -> [Help 1]
${samedir} is a property working well with eclipse plugin and is required to get related files mentioned in the checkstyle configuration working well with eclipse IDE. So either I need a consistent replacement, or I can tell maven to define the property
Any ideas how to fix this issue?
You will have to set these values via the plugin configuration in your pom.
Example configuration of pom.xml if you have a directory named checks in your project root:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-checkstyle-plugin</artifactId>
<version>3.1.2</version>
<configuration>
<configLocation>${basedir}/checks/checkstyle.xml</configLocation>
<propertiesLocation>${basedir}/checks/checkstyle_maven.properties</propertiesLocation>
</configuration>
</plugin>
And the checkstyle_maven.properties contents:
samedir=checks
As an alternative to the <propertiesLocation> you can also use the following, in which case you don't need the .properties file:
<propertyExpansion>samedir=${basedir}/checks</propertyExpansion>
This will make sure any configuration in checkstyle.xml will work like this:
<module name="Checker">
<module name="SuppressionFilter">
<property name="file" value="${samedir}/suppress.xml"/>
</module>
</module>
See for reference:
Using ${samedir} in Checkstyle-plugins for Gradle and Eclipse
http://rolf-engelhard.de/2011/04/using-the-same-suppression-filter-for-checkstyle-in-eclipse-and-maven/

Websphere 9 maven remote deployment

My springboot application builds into a WAR file (using Jenkins). I want to automate the remote deployment to Websphere 9.
I have read around and it seems there is no maven plugin for deployment to websphere 9 but ant support is pretty good. So, I'm using maven ant plugin to help running those ant tasks. I started with attempt to list the applications installed, just to see if it works. However I'm running into an exception related to localization:
[ERROR] C:\DEV\ant-was-deploy.xml:81:
java.util.MissingResourceException: Can't find bundle for base name
com.ibm.ws.profile.resourcebundle.WSProfileResourceBundle, locale
en_US
My ant-was-deploy.xml is referenced from pom.xml:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-antrun-plugin</artifactId>
<version>3.0.0</version>
<executions>
<execution>
<id>id123</id>
<phase>clean</phase>
<configuration>
<locales>es</locales>
<target>
<ant antfile="${basedir}/ant-was-deploy.xml">
<target name="listApps"/>
</ant>
</target>
</configuration>
<goals>
<goal>run</goal>
</goals>
</execution>
</executions>
</plugin>
ant-was-deploy.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project name="websphere" default="listApps" basedir="." >
<target name="listApps" >
<taskdef name="wsListApps" classname="com.ibm.websphere.ant.tasks.ListApplications" classpath="${wasHome.dir}/plugins/com.ibm.ws.runtime.jar" />
<wsListApps
profileName="AppServ01"
wasHome="C:\\opt\\IBM\\WebSphere\\AppServer"
/>
</target>
</project>
I think the error comes from com.ibm.ws.runtime.jar. Inside it has WSProfileResourceBundle.class and WSProfileResourceBundle_en.class but not WSProfileResourceBundle_en_US.class (name is just an assumption - I have copied the bundle with this name inside the jar but it didn't work).
I also tried to set the locale for the entire plugin but it seems that localization for this plugin is not implemented properly (no impact in my case - I set the locale to 'es' but still got the error for en_US).
I also tried to pass system parameters to maven command: mvn clean -Duser.language=fr -Duser.country=FR
It didn't work either.
So, my question is if there is a way to change the locale before the ant script? If I can set it to 'en' probably it will find the right resource bundle.
I'm fairly new to Websphere, if there is another solution to automate the remote deployment to websphere 9 I would be happy to hear it. I would rather not use scripts on target server or Jenkins plugin but if there is no other way ...
I just had the same issue. In my case, i was using an AppServer name (AppSrv1 instead of AppSrv01) that did not exist anymore, in my maven settings.xml.
The right server name solved the issue.

Maven / IDEA setting the Resource patterns

My project is using Maven to compile both Java and Groovy classes.
My project compiles and builds just fine using maven but I would like IDEA (IntelliJ) to build it correctly as well. I use maven to generate the IDEA project file with the following command:
mvn idea:idea
I noticed it doesn't build the groovy files, only the java files.
I found out the issue was that by default IDEA was considering all the files not having a .java extension as resources.
When I generate the project file with the maven IDEA plugin I get the following in the ipr file
<component name="CompilerConfiguration">
<option name="DEFAULT_COMPILER" value="Javac" />
<resourceExtensions />
<wildcardResourcePatterns>
<entry name="!?*.java" />
</wildcardResourcePatterns>
...
I have to modify it this way in order to have my groovy files compiling (and few others kind of files):
<component name="CompilerConfiguration">
<option name="DEFAULT_COMPILER" value="Javac" />
<resourceExtensions />
<wildcardResourcePatterns>
<entry name="!?*.java" />
<entry name="!?*.groovy" />
<entry name="!?*.scala" />
<entry name="!?*.flex" />
</wildcardResourcePatterns>
...
Note: this information can be found/edited as well in IDEA -> Settings -> Compiler -> Resource patterns
I can generate it correctly using the following command:
mvn idea:idea -DwildcardResourcePatterns="!?*.java;!?*.groovy;"
Does anyone know how to configure this in the pom.xml?
This need to be added in the pom.xml
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-idea-plugin</artifactId>
<configuration>
<wildcardResourcePatterns>!?*.java;!?*.groovy;</wildcardResourcePatterns>
</configuration>
</plugin>

Resolving type definitions from imported schema in XJC fails

I've got this API using JAXB to conveniently use object models, generated from XML Schemas by the XJC (XML-to-Java) compiler, through named references. It abstracts the creation of JAXB contexts and finding ObjectFactory methods away by all sorts of background magic and reflection. The basic gist of it is that you'd always define one general schema, and then any number (may also be 0) of schemas "extending" that general one, each resulting in its own data model. The general schema carries the reusable definitions, the ones extending it use those to compose their own models.
I've now run into the situation where I'd like to reuse the general schema for more than one project. The general type definitions should remain the same across projects, and some code will be built against the abstract classes generated from those. So I'd need to first generate classes for some generic schema, then generate those extending and using them separately. I'm using Maven for my build process.
The problem I'm running into is resolving type definitions from that generic schema in the extending schemas.
Suppose my generic schema is named "general.xsd" and looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.foobar.com/general"
xmlns:gen="http://www.foobar.com/general"
elementFormDefault="qualified" attributeFormDefault="qualified">
<!-- Element (will usually be root) -->
<xs:element name="transmission" type="gen:Transmission" />
<!-- Definition -->
<xs:complexType name="Transmission" abstract="true">
<xs:sequence>
<!-- Generic parts of a transmission would be in here... -->
</xs:sequence>
</xs:complexType>
</xs:schema>
Next to that there's a bindings file to do some naming customization and set the package name for the output:
<?xml version="1.0" encoding="UTF-8"?>
<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd"
version="2.1">
<!-- Bindings for the general schema -->
<bindings schemaLocation="general.xsd" node="/xs:schema">
<schemaBindings>
<package name="com.foobar.models.general"/>
</schemaBindings>
<bindings node="//xs:complexType[#name='Transmission']">
<!-- Some customization of property names here... -->
</bindings>
</bindings>
I'd then have the next bit in the POM of that project to generate the Java classes:
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb21-plugin</artifactId>
<version>0.8.0</version>
<executions>
<execution>
<id>xjc-generate</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>${basedir}/src/main/resources/com/foobar/schemas</schemaDirectory>
<schemaLanguage>XMLSCHEMA</schemaLanguage>
<addCompileSourceRoot>true</addCompileSourceRoot>
<episode>true</episode>
<removeOldOutput>true</removeOldOutput>
</configuration>
</execution>
</executions>
</plugin>
As you can see, I'm using the JAXB2.1 Maven plugin. I've set the option to have an episode file generated for step-wise compilation. The option to remove previous output was for a bug workaround; all it does is make sure everything's cleaned up first so recompilation is forced.
So far so good. That project compiles without a hitch. It should be noted that apart from the generated Java classes, I also package the schemas into the resulting jar file. So those are available on the classpath! The sun-jaxb.episode file is in the META-INF, as it should be.
Then I start on the project that uses schemas which will extend the above, by first importing it. One of the "subtypes" could look like this (I'll call it sub.xsd):
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.foobar.com/sub"
xmlns:sub="http://www.foobar.com/sub"
xmlns:gen="http://www.foobar.com/general"
elementFormDefault="qualified" attributeFormDefault="qualified">
<xs:import namespace="http://www.foobar.com/general" />
<!-- Definition -->
<xs:complexType name="SubTransmission">
<xs:complexContent>
<xs:extension base="gen:Transmission">
<xs:sequence>
<!-- Additional elements placed here... -->
</xs:sequence>
</xs:extension>
</xs:complexContent>
</xs:complexType>
</xs:schema>
Again, there's a bindings file:
<?xml version="1.0" encoding="UTF-8"?>
<bindings xmlns="http://java.sun.com/xml/ns/jaxb"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/jaxb http://java.sun.com/xml/ns/jaxb/bindingschema_2_0.xsd"
version="2.1">
<!-- Bindings for sub type -->
<bindings schemaLocation="sub.xsd" node="/xs:schema">
<schemaBindings>
<package name="com.foobar.models.sub"/>
</schemaBindings>
</bindings>
</bindings>
And here's the bit from the POM of this project that takes care of the XJC generation:
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb21-plugin</artifactId>
<version>0.8.0</version>
<executions>
<execution>
<id>xjc-generate</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>${basedir}/src/main/resources/com/foobar/schemas</schemaDirectory>
<schemaLanguage>XMLSCHEMA</schemaLanguage>
<addCompileSourceRoot>true</addCompileSourceRoot>
<episode>false</episode>
<catalog>${basedir}/src/main/resources/com/foobar/schemas/catalog.cat</catalog>
<episodes>
<episode>
<groupId>com.foobar</groupId>
<artifactId>foobar-general-models</artifactId>
<version>1.0.0-SNAPSHOT</version>
<scope>compile</scope>
</episode>
</episodes>
<removeOldOutput>true</removeOldOutput>
</configuration>
</execution>
</executions>
</plugin>
Originally, all the schemas were in a single folder and I had the schemaLocation attribute in the import set to general.xsd, which worked fine. But now that things are separated across projects, I run into problems. The first issue was that the other schema could not be found. I've resolved this by taking the schemaLocation attribute out of the <xs:import /> element, keep only the namespace attribute and adding a catalog file (catalog.cat) which you can see referenced in the above POM extract. Its contents are:
PUBLIC "http://www.foobar.com/general" "classpath:/com/foobar/schemas/general.xsd"
This seems to work, since I no longer get an error that states the schema cannot be found. But for some reason, resolving the actual type definitions from the imported schema continues to fail. Here's the exception:
Error while parsing schema(s).Location [ file:/C:/NetBeans_groups/Test/SubModelBundle/src/main/resources/com/foobar/schemas/sub.xsd{...,...}].
org.xml.sax.SAXParseException: src-resolve: Cannot resolve the name 'gen:Transmission' to a(n) 'type definition' component.
Here's what I tried so far:
Use a catalog file. Partially successful, since the imported schema can now be found.
Have the compilation for the general schema generate an episode file and use this for the compilation of the sub schema. Doesn't appear to make a difference, although this should only play a role once the type was resolved, so I don't think this is important yet.
Use a different JAXP (note: not JAXB, JAXP) implementation. It did use a different one, because I could see that in the exception's stack trace, but the end result is the same.
Use the maven-jaxb22-plugin instead of 21. No difference.
Looking around online, it seems people have been running into this issue since at least 2006 and it might be related to some Xerces resolver problems. I hope that this is not some bug that's been lurking around for 6 years without anyone caring to fix it. Does someone else have some suggestions? Maybe someone ran into the same problem and found a solution? The only workaround I can think of is to use 'svn:externals' to drag the general schema into the sub project and just regenerate the classes there, but it's dirty and will only work when you can connect to our svn repo.
Much thanks in advance for reading this long post. Do keep in mind that I've taken all of the above from existing projects and replaced some namespaces and other things for anonymity, so some typos are possible.
This answer was edited. Before, I had a solution using a custom catalog resolver. However, I've found the actual problem now. The explanation follows. For the TL;DR version that provides the solution, scroll to the bottom of this answer.
The problem is with the catalog file. Note how it had this line:
PUBLIC "http://www.foobar.com/general" "classpath:/com/foobar/schemas/general.xsd"
What does that say? It says that if the public ID http://www.foobar.com/general is encountered, the system ID for the schema is classpath:/com/foobar/schemas/general.xsd. So far so good. If we take the schemaLocation attribute out of our <xs:import /> elements, the only thing that remains is the public ID (namespace URN) and the catalog file tells us where to find the schema for it.
The problem occurs when that schema then uses <xs:include /> elements. They include schema files with the same target namespace. They specify a system ID (relative location). So you'd expect that to be used for resolution. However, logging the calls to the catalog resolver reveals that requests are made for resolution with both the public ID (namespace) and system ID (relative location). And that's where it goes wrong. The public ID is given preference because of the binding in the catalog file. And that leads us straight to the general.xsd file again.
Say for example that the general schema is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.foobar.com/general"
xmlns:gen="http://www.foobar.com/general"
elementFormDefault="qualified" attributeFormDefault="qualified">
<!-- Including some definitions from another schema in the same location -->
<xs:include schemaLocation="simple-types.xsd" />
<!-- Remaining stuff... -->
</xs:schema>
And that a schema using that one is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
targetNamespace="http://www.foobar.com/sub"
xmlns:sub="http://www.foobar.com/sub"
xmlns:gen="http://www.foobar.com/general"
elementFormDefault="qualified" attributeFormDefault="qualified">
<xs:import namespace="http://www.foobar.com/general" />
<!-- Remaining stuff... -->
</xs:schema>
When XJC is parsing that last schema, this is happening:
Parsing local definitions.
Encounters reference to definition from imported schema.
Checks import, finds no system ID, only public ID (http://www.foobar.com/general).
Checks catalog(s).
Finds binding of public ID to classpath:/com/foobar/schemas/general.xsd.
Parsing definitions in imported schema.
Encounters reference to definition from included schema (simple-types.xsd).
Checks include, finds system ID.
Checks catalog(s) for the system ID, but the public ID is implicit.
Finds binding of public ID to classpath:/com/foobar/schemas/general.xsd, which takes preference over system ID.
Resolution of included schema definitions fails.
The details for the order in which resolution is attempted are described in the OASIS spec for XML catalogs: https://www.oasis-open.org/committees/entity/spec.html#s.ext.ent. It takes a bit of interpretation, but you'll find that if the preferred method of resolution is the public IDs, those will take precedence when bound in the catalog file even if there is a system ID.
The solution, then, is to specify that system IDs are the preferred method of resolution, not provide system IDs in the imports so that the catalog's public ID binding is used and relying on the relative system IDs from the includes. In the OASIS XML catalog format, you can use attribute prefer="system". In the OASIS TR9401 catalog format, you can use OVERRIDE no. Apparently the default is public/yes.
So my catalog file then becomes:
OVERRIDE no
PUBLIC "http://www.foobar.com/general" "classpath:/com/foobar/schemas/general.xsd"
Now the regular catalog resolver works fine. I no longer need the custom one. However, I wouldn't have guessed that the public ID is still used for resolution when including schemas and takes precedence over the system ID. I'd have thought the public ID would only be used for imports, and that the system ID would still be considered if resolution failed. Only adding some logging to the custom resolver revealed this.
The short answer: add OVERRIDE no as the first directive in your TR9401 catalog file, or attribute prefer="system" to an XML catalog file. Don't specify schemaLocation in <xs:import /> directives, but bind the namespace to the proper schema location in the catalog file. Make sure <xs:include /> uses a relative path to the included schema.
Another interesting thing: the catalog resolver used by XJC can handle not just classpath: URIs, but also maven: URIs, which work relative to a Maven artefact. Pretty useful if you're using that as your build tool.
http://confluence.highsource.org/display/MJIIP/User+Guide#UserGuide-Usingcatalogs
Using Maven 2.2.1 works for me using org.jvnet.jaxb2.maven2.resolver.tools.ClasspathCatalogResolver.
Here's a sample configuration:
<plugin>
<groupId>org.jvnet.jaxb2.maven2</groupId>
<artifactId>maven-jaxb2-plugin</artifactId>
<version>0.8.0</version>
<executions>
<execution>
<id>executionId</id>
<goals>
<goal>generate</goal>
</goals>
<configuration>
<schemaDirectory>src/main/resources/META-INF/schemas</schemaDirectory>
<generatePackage>com.company.project.data</generatePackage>
<bindingDirectory>src/main/jaxb</bindingDirectory>
<catalog>src/main/jaxb/catalog.cat</catalog>
<catalogResolver>org.jvnet.jaxb2.maven2.resolver.tools.ClasspathCatalogResolver</catalogResolver>
<verbose>false</verbose>
<extension>true</extension>
<episodes>
<episode>
<groupId>com.company.project</groupId>
<artifactId>xsd-common-types</artifactId>
<version>${xsd-common-types.version}</version>
</episode>
</episodes>
</configuration>
</execution>
</executions>
<dependencies>
<dependency>
<groupId>com.company.project</groupId>
<artifactId>xsd-common-types</artifactId>
<version>${xsd-common-types.version}</version>
</dependency>
</dependencies>
</plugin>
Making this configuration work with Maven 3 results in a org.xml.sax.SAXParseException

Jetty Maven Plugin is ignoring custom webdefault.xml

I'm trying to get around the common issue of Jetty locking static files on Windows with the technique of setting useFileMappedBuffer to false in webdefault.xml. Unfortunately, every time Jetty is not picking up my customized webdefault.xml.
I'm using Apache Maven 3.0.2. I've tried using the maven-jetty-plugin (v6.1.26) and jetty-maven-plugin (v8.0.0.M2) but with no difference. I've tried running clean and rebuilding as well before running Jetty.
I've verified each time that my webdefault.xml was taken from the same version as the plugin and has the correct settings, namely, only changing this setting from true to false:
...
<init-param>
<param-name>useFileMappedBuffer</param-name>
<param-value>false</param-value>
</init-param>
...
And here's what my pom.xml Jetty plugin section looks like:
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>maven-jetty-plugin</artifactId>
<configuration>
<contextPath>/</contextPath>
<webDefaultXml>src/main/resources/webdefault.xml</webDefaultXml>
</configuration>
</plugin>
I've also tried altering the path to my file:
<webDefaultXml>${basedir}/src/main/resources/webdefault.xml</webDefaultXml>
Everywhere I've seen this exact solution and it sounds like it is working for others (although I found one instance where someone had my issue). The startup for jetty has this in the output:
> mvn jetty:run
...
[INFO] Web defaults = org/eclipse/jetty/webapp/webdefault.xml
[INFO] Web overrides = none
...
This further makes me think it isn't being applied. All the other paths are correct in the output.
My most direct issue that I'm seeing while Jetty is running is that whenever I edit a static file (JavaScript, CSS, etc.) with IntelliJ IDEA 10, I get this error message:
Cannot save file:
D:\...\... (The requested operation cannot be performed on a file with a user-mapped section open)
After I stop Jetty then it saves just fine. This happens every time.
Any ideas what I could be doing wrong? Thanks in advance.
I found an entirely different doc for the newer Jetty plugin jetty-maven-plugin (v8.0.0.M2) and it looks like the configuration name has changed:
http://wiki.eclipse.org/Jetty/Reference/webdefault.xml#Using_the_Jetty_Maven_Plugin
<project>
...
<plugins>
<plugin>
...
<artifactId>jetty-maven-plugin</artifactId>
<configuration>
<webAppConfig>
...
<defaultsDescriptor>/my/path/to/webdefault.xml</defaultsDescriptor>
</webAppConfig>
</configuration>
</plugin>
...
</plugins>
...
</project>
This now seems to work for the newer plugin. I'm still unsure why the v6 plugin does not pick up the customized config.
The only solution I found that worked with maven-jetty-plugin 6.1.24 was this:
http://false.ekta.is/2010/12/jettyrun-maven-plugin-file-locking-on-windows-a-better-way/
The Jetty documentation outlines three ways to do it (as of Jetty 9):
https://www.eclipse.org/jetty/documentation/current/troubleshooting-locked-files-on-windows.html
I successfully used the init-param method in Maven:
<!-- Running an embedded server for testing/development -->
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.4.9.v20180320</version>
<configuration>
<webApp>
<_initParams>
<org.eclipse.jetty.servlet.Default.useFileMappedBuffer>false</org.eclipse.jetty.servlet.Default.useFileMappedBuffer>
</_initParams>
</webApp>
</configuration>
</plugin>

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