Question

使用this method，我可以成功地解析（但不检索实际的jar）库的组织，名称和修订时的所有依赖关系，所有这些都是使用Apache Ivy以编程方式编写的。

在解析过程中，它会解析给定库的POM和finds a parent POM（如果已指定），而Ivy的POM解析器始终为tries to resolve sources and javadoc，这对于父POM通常不存在。

问题是当一个不存在的jar的URL被查询到我们的本地artifactory时，刷新它的缓存需要2~3秒，当我有很多时，需要花费几十分钟的总依赖解析时间具有父POM的传递依赖。

例如，以下是我尝试解析Google Guava 17.0时收到的日志消息：

:: loading settings :: url = jar:file:.ivy2/cache/org.apache.ivy/ivy/jars/ivy-2.3.0.jar!/org/apache/ivy/core/settings/ivysettings.xml
:: resolving dependencies :: com.google.guava#guava-envelope;17.0 [not transitive]
    confs: [default]
    validate = true
    refresh = false
resolving dependencies for configuration 'default'
== resolving dependencies for com.google.guava#guava-envelope;17.0 [default]
== resolving dependencies com.google.guava#guava-envelope;17.0->com.google.guava#guava;17.0 [default->master]
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom
    resolver: found md file for com.google.guava#guava;17.0
        => http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom (17.0)
downloading http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom ...
    resolver: downloading http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.pom
    [SUCCESSFUL ] com.google.guava#guava;17.0!guava.pom(pom.original) (58ms)
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom
    resolver: found md file for com.google.guava#guava-parent;17.0
        => http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom (17.0)
downloading http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom ...
    resolver: downloading http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.pom
    [SUCCESSFUL ] com.google.guava#guava-parent;17.0!guava-parent.pom(pom.original) (20ms)
    resolver: revision in cache: org.sonatype.oss#oss-parent;7
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-sources.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-sources.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-src.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-src.jar
        tried http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-javadoc.jar
CLIENT ERROR: Could not find resource url=http://artifactory/repo/com/google/guava/guava-parent/17.0/guava-parent-17.0-javadoc.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0-sources.jar
        tried http://artifactory/repo/com/google/guava/guava/17.0/guava-17.0-javadoc.jar
    found com.google.guava#guava;17.0 in resolver
    resolved ivy file produced in cache
:: resolution report :: resolve 2593ms :: artifacts dl 0ms
    :: modules in use:
    com.google.guava#guava;17.0 from resolver in [default]
    ---------------------------------------------------------------------
    |                  |            modules            ||   artifacts   |
    |       conf       | number| search|dwnlded|evicted|| number|dwnlded|
    ---------------------------------------------------------------------
    |      default     |   1   |   1   |   1   |   0   ||   0   |   0   |
    ---------------------------------------------------------------------
    report for com.google.guava#guava-envelope;17.0 default produced in .ivy2/cantabile/com.google.guava-guava-envelope-default.xml
    resolve done (2593ms resolve - 0ms download)

您可以看到Ivy在为父POM尝试不存在的-sources.jar，-src.jar，-javadoc.jar网址时浪费了几秒钟。

解析父POM时是否有禁用此行为的选项？理想情况下，我不希望在解析期间向任何.jar发出HTTP请求。目前我需要一个程序化解决方案，但如果有人知道命令行/ XML选项，那将是一个很大的帮助。

PS：我认为使用sbt解析库依赖关系也是如此;解析oss-parent，commons-parent等需要很长时间。

Answer 1

您需要指定一个配置映射，该映射排除可选依赖项和隐式依赖项（如source和javadoc文件）。

在常春藤文件中，您可以按如下方式声明依赖关系：

<dependency org="myorg" name="mymodule" rev="1.0" conf="default"/>

另一种选择是将此依赖关系映射声明为项目的默认值。

<dependencies defaultconfmapping="default">
  <dependency ..
  <dependency ..

请参阅以下有关如何排除源以及常春藤如何翻译Maven存储库的SO问题：

总之，Maven模块默认只有一个arefact。可以存储更多内容（如源和Javadoc），但没有列出它们的模块元数据。这就是为什么Ivy执行HTTP请求以查看是否存在人工制品的原因。更改配置映射设置应该有助于指导常春藤做正确的事:-)

PS

我认为这可以通过调用＆＃34; addDependencyConfiguration＆＃34; DefaultDependencyDescriptor对象的方法。

使用常春藤以编程方式解析POM依赖关系，但不是源代码和javadoc

1 个答案: