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Maven nar 插件：nar 文件不在依賴項目的類路徑中

[英]Maven nar plugin: nar file not in classpath of dependent project

 原文  2019-09-27 13:36:21  5   1    java/ maven/ dependencies/ classpath/ maven-nar-plugin

問題描述

I have a JNI shared library written in C and the corresponding Java class in one maven project, and an application using that class in another project. 我使用 nar-maven-plugin 來處理 JNI。 版本： Maven 3.6.0 Java 12 nar 插件 3.6.0 我以 nar-maven-plugin 附帶的集成測試 3 和 4 為例。 對於它 3，我剛剛將 POM 更新為獨立的並與 Java 12 一起使用：

<?xml version="1.0" encoding="UTF-8"?>
<!--
  #%L
  Native ARchive plugin for Maven
  %%
  Copyright (C) 2002 - 2014 NAR Maven Plugin developers.
  %%
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

  Unless required by applicable law or agreed to in writing, software
  distributed under the License is distributed on an "AS IS" BASIS,
  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  See the License for the specific language governing permissions and
  limitations under the License.
  #L%
  -->

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>

  <groupId>com.github.maven-nar</groupId>
  <artifactId>it0003-jni</artifactId>
  <packaging>nar</packaging>

  <name>NAR JNI Test</name>
  <version>1.0-SNAPSHOT</version>
  <description>
    Simple JNI Library
  </description>
  <url>http://maven.apache.org/</url>

  <properties>
    <skipTests>true</skipTests>
    <maven-compiler.version>3.8.1</maven-compiler.version>
    <surefire.version>2.22.2</surefire.version>
    <java.version>12</java.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
  </properties>  
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.12</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
  <build>
    <defaultGoal>install</defaultGoal>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${maven-compiler.version}</version>
        <configuration>
          <source>${java.version}</source>
          <target>${java.version}</target>
          <compilerArgs>
            <arg>-Xlint</arg>
            <arg>-h</arg>
            <arg>${project.build.directory}/nar/javah-include</arg>
          </compilerArgs>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>${surefire.version}</version>
        <configuration>
          <excludes>
            <exclude>**/*Test.java</exclude>
          </excludes>
          <argLine>
            <!-- - -illegal-access=permit-->
          </argLine>
        </configuration>
      </plugin>
      <plugin>
        <groupId>com.github.maven-nar</groupId>
        <artifactId>nar-maven-plugin</artifactId>
        <version>3.6.0</version>
        <extensions>true</extensions>
        <configuration>
          <cpp>
            <debug>true</debug>
          </cpp>
          <c>
            <testOptions>
              <testOption>-DTESTOPT="this is a nar-testCompile flag"</testOption>
            </testOptions>
          </c>
          <libraries>
            <library>
              <type>jni</type>
              <narSystemPackage>it0003</narSystemPackage>
              <linkCPP>false</linkCPP>
            </library>
          </libraries>
          <javah>
            <includes>
              <include></include>
            </includes>
          </javah>
          <tests>
            <test>
              <name>HelloWorld</name>
            </test>
          </tests>
        </configuration>
        <executions> 
          <execution>
            <id>default-nar-javah</id>
            <phase>none</phase>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

我在這個項目上運行mvn install ，它安裝在我的.m2目錄中

/home/karsten/.m2/repository/com/github/maven-nar/it0003-jni/:
total 0
drwxr-xr-x 1 karsten karsten 4096 Sep 27 12:20 1.0-SNAPSHOT
-rw-r--r-- 1 karsten karsten  288 Sep 27 12:21 maven-metadata-local.xml

/home/karsten/.m2/repository/com/github/maven-nar/it0003-jni/1.0-SNAPSHOT:
total 20
-rw-r--r-- 1 karsten karsten  250 Sep 27 12:21 _remote.repositories
-rw-r--r-- 1 karsten karsten 3097 Sep 27 12:21 it0003-jni-1.0-SNAPSHOT-amd64-Linux-gpp-jni.nar
-rw-r--r-- 1 karsten karsten 4570 Sep 27 12:21 it0003-jni-1.0-SNAPSHOT.nar
-rw-r--r-- 1 karsten karsten 4086 Sep 27 12:21 it0003-jni-1.0-SNAPSHOT.pom
-rw-r--r-- 1 karsten karsten  925 Sep 27 12:21 maven-metadata-local.xml

並且it0003-jni-1.0-SNAPSHOT.nar包含

META-INF/MANIFEST.MF
META-INF/
META-INF/nar/
META-INF/nar/com.github.maven-nar/
META-INF/nar/com.github.maven-nar/it0003-jni/
it0003/
META-INF/maven/
META-INF/maven/com.github.maven-nar/
META-INF/maven/com.github.maven-nar/it0003-jni/
META-INF/nar/com.github.maven-nar/it0003-jni/nar.properties
it0003/HelloWorldJNI.class
it0003/NarSystem.class
META-INF/maven/com.github.maven-nar/it0003-jni/pom.xml
META-INF/maven/com.github.maven-nar/it0003-jni/pom.properties

現在我使用它的精簡版 4 來測試它，這是 Java 文件src/main/java/it0004/Hello.java

package it0004;

import it0003.HelloWorldJNI;

public class Hello {
    public static void hello()
    {
        HelloWorldJNI.sayHello();
    }
}

並且 POM 是

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <properties>
    <java.version>12</java.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <maven-compiler.version>3.8.1</maven-compiler.version>
    <maven-source.version>2.0.4</maven-source.version>
    <nar-plugin.version>3.6.0</nar-plugin.version>
  </properties>
  <groupId>mygroup</groupId>
  <artifactId>myit0004</artifactId>
  <packaging>jar</packaging>
  <version>1.0.0</version>
  <name>Java dependency test</name>
  <dependencies>
    <dependency>
      <groupId>com.github.maven-nar</groupId>
      <artifactId>it0003-jni</artifactId>
      <version>1.0-SNAPSHOT</version>
      <type>nar</type>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>${maven-compiler.version}</version>
        <configuration>
          <source>${java.version}</source>
          <target>${java.version}</target>
          <compilerArgs>
            <arg>-Xlint</arg>
          </compilerArgs>
        </configuration>
      </plugin>
    </plugins>
  </build>
</project>

請注意，此 POM 僅處理編譯。 使用<type>nar</type>指定依賴關系，以便找到依賴關系。 但是nar文件不在classPath中，所以編譯失敗。 來自mvn -X compile的 Output 包含

[INFO]
[INFO] --- maven-compiler-plugin:3.8.1:compile (default-compile) @ myit0004 ---
[DEBUG] Dependency collection stats: {ConflictMarker.analyzeTime=428200, ConflictMarker.markTime=241300, ConflictMarker.nodeCount=118, ConflictIdSorter.graphTime=137600, ConflictIdSorter.topsortTime=62600, ConflictIdSorter.conflictIdCount=45, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=4391200, ConflictResolver.conflictItemCount=72, DefaultDependencyCollector.collectTime=419330500, DefaultDependencyCollector.transformTime=5343800}
[DEBUG] org.apache.maven.plugins:maven-compiler-plugin:jar:3.8.1:
[DEBUG]    org.apache.maven:maven-plugin-api:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-model:jar:3.0:compile
[DEBUG]       org.sonatype.sisu:sisu-inject-plexus:jar:1.4.2:compile
[DEBUG]          org.sonatype.sisu:sisu-inject-bean:jar:1.4.2:compile
[DEBUG]             org.sonatype.sisu:sisu-guice:jar:noaop:2.1.7:compile
[DEBUG]    org.apache.maven:maven-artifact:jar:3.0:compile
[DEBUG]       org.codehaus.plexus:plexus-utils:jar:2.0.4:compile
[DEBUG]    org.apache.maven:maven-core:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-settings:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-settings-builder:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-repository-metadata:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-model-builder:jar:3.0:compile
[DEBUG]       org.apache.maven:maven-aether-provider:jar:3.0:runtime
[DEBUG]       org.sonatype.aether:aether-impl:jar:1.7:compile
[DEBUG]          org.sonatype.aether:aether-spi:jar:1.7:compile
[DEBUG]       org.sonatype.aether:aether-api:jar:1.7:compile
[DEBUG]       org.sonatype.aether:aether-util:jar:1.7:compile
[DEBUG]       org.codehaus.plexus:plexus-interpolation:jar:1.14:compile
[DEBUG]       org.codehaus.plexus:plexus-classworlds:jar:2.2.3:compile
[DEBUG]       org.codehaus.plexus:plexus-component-annotations:jar:1.7.1:compile
[DEBUG]       org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3:compile
[DEBUG]          org.sonatype.plexus:plexus-cipher:jar:1.4:compile
[DEBUG]    org.apache.maven.shared:maven-shared-utils:jar:3.2.1:compile
[DEBUG]       commons-io:commons-io:jar:2.5:compile
[DEBUG]    org.apache.maven.shared:maven-shared-incremental:jar:1.1:compile
[DEBUG]    org.codehaus.plexus:plexus-java:jar:0.9.10:compile
[DEBUG]       org.ow2.asm:asm:jar:6.2:compile
[DEBUG]       com.thoughtworks.qdox:qdox:jar:2.0-M9:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-api:jar:2.8.4:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-manager:jar:2.8.4:compile
[DEBUG]    org.codehaus.plexus:plexus-compiler-javac:jar:2.8.4:runtime
[DEBUG] Created new class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.8.1
[DEBUG] Importing foreign packages into class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.8.1
[DEBUG]   Imported:  < maven.api
[DEBUG] Populating class realm plugin>org.apache.maven.plugins:maven-compiler-plugin:3.8.1
[DEBUG]   Included: org.apache.maven.plugins:maven-compiler-plugin:jar:3.8.1
[DEBUG]   Included: org.sonatype.sisu:sisu-inject-bean:jar:1.4.2
[DEBUG]   Included: org.sonatype.sisu:sisu-guice:jar:noaop:2.1.7
[DEBUG]   Included: org.codehaus.plexus:plexus-utils:jar:2.0.4
[DEBUG]   Included: org.sonatype.aether:aether-util:jar:1.7
[DEBUG]   Included: org.codehaus.plexus:plexus-interpolation:jar:1.14
[DEBUG]   Included: org.codehaus.plexus:plexus-component-annotations:jar:1.7.1
[DEBUG]   Included: org.sonatype.plexus:plexus-sec-dispatcher:jar:1.3
[DEBUG]   Included: org.sonatype.plexus:plexus-cipher:jar:1.4
[DEBUG]   Included: org.apache.maven.shared:maven-shared-utils:jar:3.2.1
[DEBUG]   Included: commons-io:commons-io:jar:2.5
[DEBUG]   Included: org.apache.maven.shared:maven-shared-incremental:jar:1.1
[DEBUG]   Included: org.codehaus.plexus:plexus-java:jar:0.9.10
[DEBUG]   Included: org.ow2.asm:asm:jar:6.2
[DEBUG]   Included: com.thoughtworks.qdox:qdox:jar:2.0-M9
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-api:jar:2.8.4
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-manager:jar:2.8.4
[DEBUG]   Included: org.codehaus.plexus:plexus-compiler-javac:jar:2.8.4
[DEBUG] Configuring mojo org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile from plugin realm ClassRealm[plugin>org.apache.maven.plugins:maven-compiler-plugin:3.8.1, parent: jdk.internal.loader.ClassLoaders$AppClassLoader@446cdf90]
[DEBUG] Configuring mojo 'org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile' with basic configurator -->
[DEBUG]   (f) basedir = /home/karsten/svn/myit0004
[DEBUG]   (f) buildDirectory = /home/karsten/svn/myit0004/target
[DEBUG]   (f) compilePath = [/home/karsten/svn/myit0004/target/classes]
[DEBUG]   (f) compileSourceRoots = [/home/karsten/svn/myit0004/src/main/java]
[DEBUG]   (f) compilerArgs = [-Xlint]
[DEBUG]   (f) compilerId = javac
[DEBUG]   (f) debug = true
[DEBUG]   (f) encoding = UTF-8
[DEBUG]   (f) failOnError = true
[DEBUG]   (f) failOnWarning = false
[DEBUG]   (f) forceJavacCompilerUse = false
[DEBUG]   (f) fork = false
[DEBUG]   (f) generatedSourcesDirectory = /home/karsten/svn/myit0004/target/generated-sources/annotations
[DEBUG]   (f) mojoExecution = org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile {execution: default-compile}
[DEBUG]   (f) optimize = false
[DEBUG]   (f) outputDirectory = /home/karsten/svn/myit0004/target/classes
[DEBUG]   (f) parameters = false
[DEBUG]   (f) project = MavenProject: mygroup:myit0004:1.0.0 @ /home/karsten/svn/myit0004/pom.xml
[DEBUG]   (f) projectArtifact = mygroup:myit0004:jar:1.0.0
[DEBUG]   (f) session = org.apache.maven.execution.MavenSession@3e84111a
[DEBUG]   (f) showDeprecation = false
[DEBUG]   (f) showWarnings = false
[DEBUG]   (f) skipMultiThreadWarning = false
[DEBUG]   (f) source = 12
[DEBUG]   (f) staleMillis = 0
[DEBUG]   (s) target = 12
[DEBUG]   (f) useIncrementalCompilation = true
[DEBUG]   (f) verbose = false
[DEBUG] -- end configuration --
[DEBUG] Using compiler 'javac'.
[DEBUG] Adding /home/karsten/svn/myit0004/target/generated-sources/annotations to compile source roots:
  /home/karsten/svn/myit0004/src/main/java
[DEBUG] New compile source roots:
  /home/karsten/svn/myit0004/src/main/java
  /home/karsten/svn/myit0004/target/generated-sources/annotations
[DEBUG] CompilerReuseStrategy: reuseCreated
[DEBUG] useIncrementalCompilation enabled
[DEBUG] Stale source detected: /home/karsten/svn/myit0004/src/main/java/it0004/Hello.java
[INFO] Changes detected - recompiling the module!
[DEBUG] Classpath:
[DEBUG]  /home/karsten/svn/myit0004/target/classes
[DEBUG] Source roots:
[DEBUG]  /home/karsten/svn/myit0004/src/main/java
[DEBUG]  /home/karsten/svn/myit0004/target/generated-sources/annotations
[DEBUG] Command line options:
[DEBUG] -d /home/karsten/svn/myit0004/target/classes -classpath /home/karsten/svn/myit0004/target/classes: -sourcepath /home/karsten/svn/myit0004/src/main/java:/home/karsten/svn/myit0004/target/generated-sources/annotations: -s /home/karsten/svn/myit0004/target/generated-sources/annotations -g -nowarn -target 12 -source 12 -encoding UTF-8 -Xlint
[DEBUG] incrementalBuildHelper#beforeRebuildExecution
[INFO] Compiling 1 source file to /home/karsten/svn/myit0004/target/classes
[DEBUG] incrementalBuildHelper#afterRebuildExecution
[INFO] -------------------------------------------------------------
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/karsten/svn/myit0004/src/main/java/it0004/Hello.java:[3,14] package it0003 does not exist
[ERROR] /home/karsten/svn/myit0004/src/main/java/it0004/Hello.java:[8,9] cannot find symbol
  symbol:   variable HelloWorldJNI
  location: class it0004.Hello
[INFO] 2 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  2.606 s
[INFO] Finished at: 2019-09-27T13:28:44Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project myit0004: Compilation failure: Compilation failure:
[ERROR] /home/karsten/svn/myit0004/src/main/java/it0004/Hello.java:[3,14] package it0003 does not exist
[ERROR] /home/karsten/svn/myit0004/src/main/java/it0004/Hello.java:[8,9] cannot find symbol
[ERROR]   symbol:   variable HelloWorldJNI
[ERROR]   location: class it0004.Hello

可以看到，依賴的nar文件不在classPath中，所以編譯失敗，因為找不到依賴class。 如何確保 nar 文件包含在 classPath 中？

1 個解決方案

解決方案1
 0  2019-10-01 09:46:42

找到了答案。 我應該查看 it0025 示例。 需要添加到依賴項目的pom.xml的是

      <plugin>
        <groupId>com.github.maven-nar</groupId>
        <artifactId>nar-maven-plugin</artifactId>
        <version>${nar-plugin.version}</version>
        <extensions>true</extensions>
        <executions>
          <execution>
            <id>nar-download</id>
            <goals>
              <goal>nar-download</goal>
            </goals>
          </execution>
          <execution>
            <id>nar-test-unpack</id>
            <goals>
              <goal>nar-test-unpack</goal>
            </goals>
          </execution>
          <execution>
            <id>nar-integration-test</id>
            <goals>
              <goal>nar-integration-test</goal>
            </goals>
          </execution>
        </executions>
      </plugin>

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