循环相关项目的Eclipse m2e插件问题

Question

对于循环依赖的项目，我对m2e插件有一个问题。

首先，我知道循环依赖是不好的，maven也不允许它，它们应该被避免等等，但是我们的遗留项目是在没有改变项目结构的情况下被马文化的(循环依赖被继续)。

以前，将每个项目添加到其他项目构建路径并将循环依赖构建路径问题设置为警告是解决方案。这样，我就可以在一个项目中做出改变，然后立即在另一个项目中看到效果。

现在项目已经被m2e化了，我希望通过启用m2e工作区解析(通过检查“从工作区项目中解决依赖关系”选项)来实现相同的工作区环境。

在eclipse (版本: Neon.3版本(4.6.3)构建id: 20170314-1500)和m2e版本1.7.0.201603-1933中，这是可能的。相应的maven依赖将从工作区项目中解析，尽管构建路径中存在循环。

但是，在Eclipse2019-09 R(版本: 2019-09 R (4.13.0)构建id: 20190917-1200和m2e版本1.13.0.20190716-1624)和以后版本中，生成结果在无限循环中。对于两个循环项目，我的项目A和我的项目B分别使用maven工件is，MYPROJECTBARTIFACTID，下面是209-09 R版本无限构建的m2e日志(我无法从霓虹灯版本收集日志)。

重复一遍，我知道maven本身不允许循环项目设置，但总的来说，eclipse也允许它，甚至对于具有maven性质的项目也是如此。

如何在最新的eclipse版本中实现同样的目标？

2020-05-22 21:19:26,588 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.builder.MavenBuilder - Building project MY PROJECT B
2020-05-22 21:19:26,683 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultLocalRepositoryProvider - Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\MAVEN_REPONEW
2020-05-22 21:19:26,697 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.ProjectRegistryManager - Refreshing: [L/MY PROJECT B/pom.xml]
2020-05-22 21:19:26,709 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultLocalRepositoryProvider - Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\MAVEN_REPONEW
2020-05-22 21:19:26,712 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Reading 1 Maven project(s): [D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml]
2020-05-22 21:19:26,764 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultUpdatePolicyAnalyzer - Skipped remote request for ...
2020-05-22 21:19:26,868 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Read 1 Maven project(s) in 156 ms
2020-05-22 21:19:27,036 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.m.MavenMarkerManager - Created marker 'GroupId is duplicate of parent groupId' on resource '/MY PROJECT B/pom.xml'.
2020-05-22 21:19:27,043 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultLocalRepositoryProvider - Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\MAVEN_REPONEW
2020-05-22 21:19:27,086 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loading lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:27,670 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.c.DefaultDependencyCollector - Dependency collection stats: {ConflictMarker.analyzeTime=637200, ConflictMarker.markTime=709300, ConflictMarker.nodeCount=118, ConflictIdSorter.graphTime=487300, ConflictIdSorter.topsortTime=290200, ConflictIdSorter.conflictIdCount=45, ConflictIdSorter.conflictIdCycleCount=0, ConflictResolver.totalTime=3881500, ConflictResolver.conflictItemCount=72, DefaultDependencyCollector.collectTime=398895400, DefaultDependencyCollector.transformTime=7801200}
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] INFO  o.e.m.c.i.l.LifecycleMappingFactory - Using org.eclipse.m2e.jdt.JarLifecycleMapping lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loaded lifecycle mapping in 699 ms for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - MY PROJECT B is configured by :
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.jdt.javaConfigurator
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.java.unsupportedDependencyTypeConfigurator
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jpa.configurator.jdt
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.utility.configurator
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.webfragment.configurator
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.sonatype.m2e.mavenarchiver.jararchiverconfigurator
2020-05-22 21:19:27,785 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jaxrs.configurator
2020-05-22 21:19:27,786 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.DefaultMavenDependencyResolver - Resolving dependencies for P/MY PROJECT B: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT
2020-05-22 21:19:27,786 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Reading Maven project: D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml
2020-05-22 21:19:27,790 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultUpdatePolicyAnalyzer - Skipped remote request for com.my.company:... locally cached metadata up-to-date.
2020-05-22 21:19:28,529 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.c.DefaultDependencyCollector - Dependency collection stats: {ConflictMarker.analyzeTime=925200, ConflictMarker.markTime=269600, ConflictMarker.nodeCount=328, ConflictIdSorter.graphTime=1694200, ConflictIdSorter.topsortTime=470600, ConflictIdSorter.conflictIdCount=88, ConflictIdSorter.conflictIdCycleCount=48, ConflictResolver.totalTime=7407900, ConflictResolver.conflictItemCount=309, DefaultDependencyCollector.collectTime=730670400, DefaultDependencyCollector.transformTime=10784800}
2020-05-22 21:19:28,539 [Worker-7: Building Workspace] INFO  o.e.m.c.i.p.WorkspaceClassifierResolverManager - Resolving P/MY PROJECT A: com.my.company:MYPROJECTAARTIFACTID:1.0.1-SNAPSHOT with classifier  to /MY PROJECT A/target/classes
2020-05-22 21:19:28,598 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Read Maven project: D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml in 812 ms
2020-05-22 21:19:28,598 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.DefaultMavenDependencyResolver - Resolved dependencies for P/MY PROJECT B: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT in 812 ms
2020-05-22 21:19:28,600 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultLocalRepositoryProvider - Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\MAVEN_REPONEW
2020-05-22 21:19:28,601 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loading lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,607 [Worker-1: Decoration Calculation] DEBUG o.e.j.i.storage.file.FileSnapshot - file=C:\Program Files\Git\etc\gitconfig, isRacyClean=false, read=2020-05-22 21:18:57.612000000, lastModified=2020-04-28 20:51:11.602527000, delta=2075266009473000 ns, racy<=2500000000 ns
2020-05-22 21:19:28,607 [Worker-1: Decoration Calculation] DEBUG o.e.j.i.storage.file.FileSnapshot - file=C:\Program Files\Git\etc\gitconfig, is unmodified
.......
2020-05-22 21:19:28,677 [Worker-7: Building Workspace] INFO  o.e.m.c.i.l.LifecycleMappingFactory - Using org.eclipse.m2e.jdt.JarLifecycleMapping lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loaded lifecycle mapping in 77 ms for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - MY PROJECT B is configured by :
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.jdt.javaConfigurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.java.unsupportedDependencyTypeConfigurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jpa.configurator.jdt
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.utility.configurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.webfragment.configurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.sonatype.m2e.mavenarchiver.jararchiverconfigurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jaxrs.configurator
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.DefaultMavenDependencyResolver - Resolving dependencies for P/MY PROJECT B: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT
2020-05-22 21:19:28,678 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Reading Maven project: D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml
2020-05-22 21:19:28,689 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.c.DefaultDependencyCollector - Dependency collection stats: {ConflictMarker.analyzeTime=288800, ConflictMarker.markTime=102300, ConflictMarker.nodeCount=328, ConflictIdSorter.graphTime=336300, ConflictIdSorter.topsortTime=260900, ConflictIdSorter.conflictIdCount=88, ConflictIdSorter.conflictIdCycleCount=48, ConflictResolver.totalTime=3849800, ConflictResolver.conflictItemCount=309, DefaultDependencyCollector.collectTime=5078800, DefaultDependencyCollector.transformTime=4849700}
2020-05-22 21:19:28,697 [Worker-7: Building Workspace] INFO  o.e.m.c.i.p.WorkspaceClassifierResolverManager - Resolving P/MY PROJECT A: com.my.company:MYPROJECTAARTIFACTID:1.0.1-SNAPSHOT with classifier  to /MY PROJECT A/target/classes
2020-05-22 21:19:28,739 [Worker-7: Building Workspace] DEBUG o.e.m.c.internal.embedder.MavenImpl - Read Maven project: D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml in 61 ms
2020-05-22 21:19:28,739 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.DefaultMavenDependencyResolver - Resolved dependencies for P/MY PROJECT B: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT in 61 ms
2020-05-22 21:19:28,740 [Worker-7: Building Workspace] DEBUG o.e.a.i.i.DefaultLocalRepositoryProvider - Using manager EnhancedLocalRepositoryManager with priority 10.0 for D:\MAVEN_REPONEW
2020-05-22 21:19:28,741 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loading lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] INFO  o.e.m.c.i.l.LifecycleMappingFactory - Using org.eclipse.m2e.jdt.JarLifecycleMapping lifecycle mapping for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - Loaded lifecycle mapping in 63 ms for MavenProject: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT @ D:\LOCALGITREPOS\CYCLE_2019\MYPROJECTBARTIFACTID\MY PROJECT B\pom.xml.
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory - MY PROJECT B is configured by :
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.jdt.javaConfigurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.java.unsupportedDependencyTypeConfigurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jpa.configurator.jdt
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.utility.configurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.maven.ide.eclipse.configuration.wtp.webfragment.configurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.sonatype.m2e.mavenarchiver.jararchiverconfigurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.l.LifecycleMappingFactory -  - org.eclipse.m2e.wtp.jaxrs.configurator
2020-05-22 21:19:28,804 [Worker-7: Building Workspace] DEBUG o.e.m.c.i.p.r.DefaultMavenDependencyResolver - Resolving dependencies for P/MY PROJECT B: com.my.company:MYPROJECTBARTIFACTID:1.0.1-SNAPSHOT
................

-----------------------------EDIT 1

示例项目添加到github ( https://github.com/simpleusr/eclipseproblem )中，用于复制问题。最近的eclipse版本: 2020-03 (4.15.0)构建id: 20200313-1211也失败了。

Answer 1

Eclipse允许对具有循环依赖关系的多个项目进行编译，。但是在这里，解决Maven依赖关系会导致无限循环，这是另一回事。为了解决和下载依赖关系，Eclipse使用随Eclipse附带的嵌入式Maven。

由于Maven不允许循环依赖项，所以也不能从命令行构建它。在Eclipse中，通过手动在Java路径中添加另一个项目并允许Java的循环依赖，它可以在pom.xml文件中不使用无效的Maven依赖项。但是这些手动设置将被覆盖在Maven > Update上.

如果您想使用Maven构建您的项目，您有两个选项：

• 将所有内容放入单个Maven项目中，可能包含多个源文件夹。在一个后处理步骤中，您可以将构建的JAR拆分成几个JAR。这与多个循环相互依赖的项目具有相同的缺点:如果不是所有依赖项的整个代码都在类路径上，那么在运行时可能会丢失一些内容。
• Eliminate循环。根据我的经验，这是我的建议，因为从长远来看，投入的时间(可能是几周)是有回报的(而且使用模块化代码比使用意大利面代码更有趣)。