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社区首页 >问答首页 >ant gwt编译器任务失败

问ant gwt编译器任务失败
EN

Stack Overflow用户
提问于 2012-04-04 23:35:09
回答 4查看 5.3K关注 0票数 4

我遵循这个tutorial来创建我的ant构建文件，该文件由java编译，然后GWT编译，然后执行正确的操作来构建我的.war文件。

我使用Eclipse和GWT-compile工作，当我运行开发模式时，它工作。我还成功地在tomcat上进行了部署。

问题是，当我运行我的脚本时，编译工作，但它在gwt编译器任务中失败。我的ant构建脚本如下：

代码语言：javascript
复制
<project name="vlp" default="gwt.compile" basedir=".">
    <tstamp />
    <!-- ################# PROPERTIES ################ -->
    <!-- directory properties -->
    <!-- source -->
    <property name="projectName" value="VirtualLabPortal" />
    <property name="src.dir" location="src" />
    <property name="build.dir" location="bin" />
    <property name="src.build.dir" location="${build.dir}/src" />
    <property name="gwt.build.dir" location="${build.dir}/gwt" />
    <property name="gwt.unitCache.dir" location="gwt-unitCache" />
    <!-- libraries -->
    <property name="src.lib.dir" location="war/WEB-INF/lib" />

    <!-- ___________________________________________________________________
        |                                                                   |
        |               Configure path source/test                          |
        |___________________________________________________________________| 
    -->
    <path id="compile.path">
        <fileset dir="${src.lib.dir}" includes="*.jar" />
        <fileset dir="${src.lib.dir}/gwt" includes="*.jar" />
    </path>
    <!-- ___________________________________________________________________
        |                                                                   |
        |               Clean old compiled source/test/war                  |
        |___________________________________________________________________| 
    -->
    <target name="clean" description="Clean all the old build files.">
        <delete dir="${build.dir}" />
        <delete dir="${gwt.unitCache.dir}" />
        <delete file="${projectWar}" />
        <delete file="${src.lib.dir}/${projectJar}" />
    </target>
    <!-- ___________________________________________________________________
        |                                                                   |
        |                       Compile the source                          |
        |(should exclude gwtview code which is compiled by the gwt compiler)|   
        |___________________________________________________________________| 
    -->
    <target name="src.compile" depends="clean" description="Compile the source code when everything has been cleaned.">
        <mkdir dir="${src.build.dir}" />
        <javac encoding="utf-8" destdir="${src.build.dir}" nowarn="true">
            <src path="${src.dir}" />
            <classpath refid="compile.path" />
        </javac>
    </target>
    <!-- ___________________________________________________________________
        |                                                                   |
        |                       Invoke the GWT compiler                     |
        |___________________________________________________________________| 
    -->
    <property name="module.gwt.xml" location="${src.dir}/com/banctecmtl/ca/vlp" />
    <target name="gwt.compile" depends="src.compile">
        <java failonerror="true" fork="true" classname="com.google.gwt.dev.Compiler">
            <classpath>
                <!-- src dir is added to ensure the module.xml file(s) are on the classpath -->
                <pathelement location="${module.gwt.xml}" />
                <path refid="compile.path" />
            </classpath>
            <jvmarg value="-Xmx512m" />
            <arg line="${projectName} -logLevel ALL -style OBF -war ${build.dir}" />
        </java>
    </target>
    <!-- ___________________________________________________________________
        |                                                                   |
        |           Copy the config files in the war directory              |
        |___________________________________________________________________| 
    -->
    <property name="config.dir" location="war/config" />
    <target name="copy-resources">
        <copy todir="war/config" preservelastmodified="true">
            <fileset dir="${config.dir}">
                <include name="**.*" />
            </fileset>
        </copy>
    </target>
    <!-- ___________________________________________________________________
        |                                                                   |
        |           Create a Jar to be included in the war                  |
        |___________________________________________________________________| 
    -->
    <property name="projectJar" value="${projectName}.jar" />
    <property name="gwt.client.dir" location="com/banctecmtl/ca/vlp/view/webview" />
    <target name="jar" depends="src.compile">
        <!-- should also depend on gwt.compile -->
        <jar jarfile="${src.lib.dir}/${projectJar}" basedir="${src.build.dir}/">
            <!-- Don't wrap any of the client only code into the JAR
                <exclude name="${gwt.client.dir}/**/*.class"/> -->
            <exclude name="${gwt.client.dir}/**/*.class" />
        </jar>
    </target>
    <!-- ___________________________________________________________________
        |                                                                   |
        |                   Create a War from the source                    |
        |___________________________________________________________________| 
    -->
    <property name="projectWar" value="${projectName}.war" />
    <target name="war" depends="jar,copy-resources">
        <war basedir="war" destfile="${projectWar}" webxml="war/WEB-INF/web.xml">
            <exclude name="WEB-INF/**" />
            <webinf dir="war/WEB-INF/">
                <include name="lib/*.jar" />
                <include name="classes/*.properties" />
                <exclude name="**/gwt-dev.jar" />
                <exclude name="**/gwt-user.jar" />
            </webinf>
        </war>
    </target>

    <!-- ___________________________________________________________________
        |                                                                   |
        |                   Deploy to the production server                 |
        |___________________________________________________________________| 
    -->
    <!-- It is possible you can't run this from eclipse,
     you need to edit the run configurations and add the 
     latest jsch library to the classpath -->
    <property name="user" value="root" />
    <property name="password" value="Banctec01" />
    <property name="prodHost" value="vlp" />
    <property name="dest" value="/usr/share/tomcat6/webapps/ROOT.war" />
    <target name="deploy" depends="war">
        <echo message="Copying to : ${user}@${prodHost}:${dest}" />
        <scp file="${projectWar}" remoteTofile="${user}@${prodHost}:${dest}" password="${password}" trust="true" />
    </target>
</project>

它会失败，并显示以下错误：

代码语言：javascript
复制
Buildfile: D:\workspace\vlp\build.xml
clean:
   [delete] Deleting directory D:\workspace\vlp\war\WEB-INF\classes
src.compile:
    [mkdir] Created dir: D:\workspace\vlp\war\WEB-INF\classes
    [javac] D:\workspace\vlp\build.xml:42: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds
    [javac] Compiling 134 source files to D:\workspace\vlp\war\WEB-INF\classes
    [javac] Note: D:\workspace\vlp\src\com\banctecmtl\ca\vlp\controller\schedule\ScheduledTaskManager.java uses unchecked or unsafe operations.
    [javac] Note: Recompile with -Xlint:unchecked for details.
gwt.compile:
     [java] Checking for updates
     [java]    First launch was 134c3e23387
     [java]    Last ping was Mon Apr 23 14:42:48 EDT 2012, min wait is 86400000ms
     [java] Module location: file:/D:/workspace/vlp/src/com/banctecmtl/ca/vlp/VirtualLabPortal.gwt.xml
     [java] Loading inherited module 'com.google.gwt.user.User'
     [java]    Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/user/User.gwt.xml
     [java]    Loading inherited module 'com.google.gwt.animation.Animation'
     [java]       Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/animation/Animation.gwt.xml
     [java]       Loading inherited module 'com.google.gwt.core.Core'
     [java]          Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/core/Core.gwt.xml
     [java]          Loading inherited module 'com.google.gwt.dev.jjs.intrinsic.Intrinsic'
     [java]             Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-dev.jar!/com/google/gwt/dev/jjs/intrinsic/Intrinsic.gwt.xml
     [java]             Loading inherited module 'com.google.gwt.lang.LongLib'
     [java]                Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-dev.jar!/com/google/gwt/lang/LongLib.gwt.xml
     [java]          Loading inherited module 'com.google.gwt.emul.Emulation'
     [java]             Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/emul/Emulation.gwt.xml
     [java]             Loading inherited module 'com.google.gwt.logging.LogImpl'
     [java]                Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/logging/LogImpl.gwt.xml
     [java]          Loading inherited module 'com.google.gwt.xhr.XMLHttpRequest'
     [java]             Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/xhr/XMLHttpRequest.gwt.xml
     [java]             Loading inherited module 'com.google.gwt.core.Core'
     [java]                Module 'com.google.gwt.core.Core' has already been loaded and will be skipped
     [java]          Loading inherited module 'com.google.gwt.core.CompilerParameters'
     [java]             Module location: jar:file:/D:/workspace/vlp/war/WEB-INF/lib/gwt/gwt-user.jar!/com/google/gwt/core/CompilerParameters.gwt.xml
     [java]          [...]
     [java]    Loading inherited module 'com.google.gwt.user.User'
     [java]       Module 'com.google.gwt.user.User' has already been loaded and will be skipped
     [java] Public resources found in...
     [java] Translatable source found in...
     [java] Persistent unit cache dir set to: D:\workspace\vlp\war\..\gwt-unitCache
     [java] Compiling module VirtualLabPortal
     [java] Looking for previously cached Compilation Units in D:\workspace\vlp\war\..\gwt-unitCache
     [java] Loaded 0 units from persistent store.
     [java] Starting UnitWriteThread.
     [java]    Found 0 cached units.  Used 0 / 2413 units from cache.
     [java] [ERROR] Unexpected internal compiler error
     [java] java.lang.RuntimeException: Exception processing units
     [java]     at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater.compile(CompilationStateBuilder.java:248)
     [java]     at com.google.gwt.dev.javac.CompilationStateBuilder.doBuildFrom(CompilationStateBuilder.java:447)
     [java]     at com.google.gwt.dev.javac.CompilationStateBuilder.buildFrom(CompilationStateBuilder.java:370)
     [java]     at com.google.gwt.dev.cfg.ModuleDef.getCompilationState(ModuleDef.java:360)
     [java]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:252)
     [java]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:233)
     [java]     at com.google.gwt.dev.Precompile.precompile(Precompile.java:145)
     [java]     at com.google.gwt.dev.Compiler.run(Compiler.java:232)
     [java]     at com.google.gwt.dev.Compiler.run(Compiler.java:198)
     [java]     at com.google.gwt.dev.Compiler$1.run(Compiler.java:170)
     [java]     at com.google.gwt.dev.CompileTaskRunner.doRun(CompileTaskRunner.java:88)
     [java]     at com.google.gwt.dev.CompileTaskRunner.runWithAppropriateLogger(CompileTaskRunner.java:82)
     [java]     at com.google.gwt.dev.Compiler.main(Compiler.java:177)
     [java] Caused by: java.lang.NoSuchMethodError: com.google.gwt.dev.jjs.ast.JProgram.serializeTypes(Ljava/util/List;Ljava/io/ObjectOutputStream;)V
     [java]     at com.google.gwt.dev.javac.CompilationUnitImpl.<init>(CompilationUnitImpl.java:68)
     [java]     at com.google.gwt.dev.javac.SourceFileCompilationUnit.<init>(SourceFileCompilationUnit.java:48)
     [java]     at com.google.gwt.dev.javac.CompilationUnitBuilder$ResourceCompilationUnitBuilder.makeUnit(CompilationUnitBuilder.java:154)
     [java]     at com.google.gwt.dev.javac.CompilationUnitBuilder.build(CompilationUnitBuilder.java:266)
     [java]     at com.google.gwt.dev.javac.CompilationStateBuilder$CompileMoreLater$1.run(CompilationStateBuilder.java:223)

BUILD FAILED
D:\workspace\vlp\build.xml:60: Java returned: 1

Total time: 36 seconds

我发现将gwt-compiler类名更改为DevMode是成功构建的。使用：classname="com.google.gwt.dev.DevMode"而不是classname="com.google.gwt.dev.Compiler"。

编辑:我重构了上面的XML。build.xml将清理所有的bin目录。我还将javac指向bin/src目录，并将Google Web Toolkit编译器输出指向：bin/gwt。编译器还是不能工作...

编辑:我立即从google developpers站点下载了最新的SDK，并覆盖了我的classpath和eclipse插件中的旧库。仍然不能使用ant构建脚本。

有没有人看到问题出在哪里？

gwt
compiler-construction
ant
EN

回答 4

Stack Overflow用户

回答已采纳

发布于 2012-05-01 05:10:18

我所能说的是，只有在gwt-dev 2.4.0中才引入了com.google.gwt.dev.jjs.ast.JProgram.serializeTypes(Ljava/util/List;Ljava/io/ObjectOutputStream;)V方法。它不存在于gwt-dev 2.3.0中。

这意味着在类路径中有两个gwt-dev版本。其中之一是2.4.0，这就是com.google.gwt.dev.javac.CompilationUnitImpl正在寻找该方法的原因。另一个是2.3.0或更早的版本，这就是为什么找不到该方法的原因(JProgram类是由编译器使用旧版本加载的)。

试着彻底地查一查。或者尝试开始一个新的环境，在这个环境中，你可以很好地关注正在进入的东西。

票数 3
EN

Stack Overflow用户

发布于 2012-05-03 07:21:28

tl;dr:这是由于在类上下文不足或不正确的情况下， DevMode 提供的链接器与提供的链接器存在差异

追踪问题

我注意到你的repro存在于当前的GWT trunk中。具体地说，它在这段代码中失败了：

代码语言：javascript
复制
ArrayList<CompilationUnit> resultUnits = new ArrayList<CompilationUnit>();
      do {
        // Compile anything that needs to be compiled.
        buildQueue = new LinkedBlockingQueue<CompilationUnitBuilder>();
        final ArrayList<CompilationUnit> newlyBuiltUnits = new ArrayList<CompilationUnit>();
        final CompilationUnitBuilder sentinel = CompilationUnitBuilder.create((GeneratedUnit) null);
        final Throwable[] workerException = new Throwable[1];
        Thread buildThread = new Thread() {
          @Override
          public void run() {
            try {
              do {
                CompilationUnitBuilder builder = buildQueue.take();
                if (builder == sentinel) {
                  return;
                }
                // Expensive, must serialize GWT AST types to bytes.
                CompilationUnit unit = builder.build(); // <-- Right here.
                newlyBuiltUnits.add(unit);
              } while (true);
            } catch (Throwable e) {
              workerException[0] = e;
            }
          }
        };

在展开堆栈的过程中，我们遍历了一个工厂和十层代码，直到我们最终找到了UnifyAst.java。然后，你瞧：

代码语言：javascript
复制
...
mapApi(enclosingType);

// Now the method should be there.
method = methodMap.get(sig);
if (method == null) {
  // TODO: error logging
  throw new NoSuchMethodError(sig);
}
assert !method.isExternal();
return method;
...

这是GWT的预编译阶段唯一调用的NoSuchMethodError实例。

编译器和DevMode链接的区别

凉爽的。既然我们已经深入研究了为什么它是爆炸性的，让我们来弄清楚为什么DevMode可以工作，而Compiler不能。

检查链接器，我们注意到Compiler直接使用Link.link：

代码语言：javascript
复制
Link.link(logger.branch(TreeLogger.TRACE, logMessage), module,
          generatedArtifacts, allPerms, resultFiles, options.getWarDir(),
          options.getDeployDir(), options.getExtraDir(), precompileOptions);

而DevMode使用更简洁的静态调用，并在StandardLinkerContext的实例中使用单独的传递

代码语言：javascript
复制
link(loadLogger, module);

...

@Override
protected synchronized void produceOutput(TreeLogger logger, StandardLinkerContext linkerStack,
      ArtifactSet artifacts, ModuleDef module, boolean isRelink) throws UnableToCompleteException {

    ...
    linkerStack.produceOutput(linkLogger, artifacts, Visibility.Public, outFileSet);
    linkerStack.produceOutput(linkLogger, artifacts, Visibility.Deploy, deployFileSet);
    linkerStack.produceOutput(linkLogger, artifacts, Visibility.Private, extraFileSet);
    ...
}

太棒了！那么，我该如何修复它呢？

正如在写这篇文章时所接受的，yair provides one such diagnosis for the issue,指出，在两个版本的GWT的上下文中，预编译步骤对于冲突的类标识是不健壮的。其他类可见性问题，如precompilation.getGeneratedArtifacts();拉入错误或不足的对象，也可能导致这种再现。

我假设这个问题现在已经解决了，因为yair被给予了accepted状态。但可以想象，其他人在这篇文章中运行的其他类路径或可见性问题可能会导致这个确切的问题再次出现。

票数 3
EN

Stack Overflow用户

发布于 2012-04-05 00:43:12

GWT编译器不支持java.io.ObjectOutputStream类。

您必须在使用Java类之前引用https://developers.google.com/web-toolkit/doc/latest/RefJreEmulation#Package_java_io，以确保GWT支持它。

票数 0
EN
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：

https://stackoverflow.com/questions/10014421

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