为什么在 superdevmode 下重新编译 GWT 项目不会导致输出 javascript 代码发生变化？答案

【问题标题】：Why does recompiling a GWT project in superdevmode result in no changes in output javascript code?为什么在 superdevmode 下重新编译 GWT 项目不会导致输出 javascript 代码发生变化？
【发布时间】：2014-02-25 04:09:27
【问题描述】：

我打算在 SuperDevMode 中调试 GWT Web 应用程序，我之前在 DevMode 中调试过该应用程序，以克服使用 GWT Elemental 库时内存使用量激增的问题。到目前为止，我可以通过使用 Eclipse 运行配置或 mvn gwt:run 以 maven 作为我的代码服务器 (mvn gwt:run-codeserver) 在浏览器中成功运行应用程序。此时我的问题是，每当我对代码进行更改并使用“Dev Mode On”小书签中的“编译”按钮时，浏览器或源映射中的代码都不会发生更改。编译完成后，页面重新加载，对话框显示模块“可能需要（重新）编译”。为了刷新浏览器中的代码，我必须重新启动代码服务器。我的项目的 pom.xml 如下。

<?xml version="1.0" encoding="UTF-8"?>
<project>
<!-- POM file generated with GWT webAppCreator -->
<modelVersion>4.0.0</modelVersion>
<groupId>com.company</groupId>
<artifactId>mega-app</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>GWT Maven Archetype</name>

<properties>
    <!-- Convenience property to set the GWT version -->
    <gwtVersion>2.6.0</gwtVersion>
    <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<dependencies>
    <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt-servlet</artifactId>
        <version>${gwtVersion}</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt-user</artifactId>
        <version>${gwtVersion}</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.7</version>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.0.0.GA</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.0.0.GA</version>
        <classifier>sources</classifier>
        <scope>test</scope>
    </dependency>
    <!-- Server protocol -->
    <dependency>
        <groupId>com.company.server</groupId>
        <artifactId>server-lib</artifactId>
        <version>0.0.1</version>
    </dependency>
    <dependency>
        <groupId>com.company.server</groupId>
        <artifactId>server-lib</artifactId>
        <version>0.0.1</version>
        <classifier>sources</classifier>
    </dependency>
    <dependency>
        <groupId>com.gwtplatform</groupId>
        <artifactId>gwtp-mvp-client</artifactId>
        <version>${gwtp.version}</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.googlecode.gwtquery</groupId>
        <artifactId>gwtquery</artifactId>
        <version>1.4.0</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>com.google.inject</groupId>
        <artifactId>guice</artifactId>
        <version>3.0</version>
    </dependency>
    <dependency>
        <groupId>com.google.gwt.inject</groupId>
        <artifactId>gin</artifactId>
        <version>2.1.2</version>
    </dependency>
    <dependency>
        <groupId>com.google.gwt</groupId>
        <artifactId>gwt-elemental</artifactId>
        <version>${gwtVersion}</version>
    </dependency>
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>15.0</version>
    </dependency>
</dependencies>

<build>
    <!-- Generate compiled stuff in the folder used for developing mode -->
    <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>

    <pluginManagement>
        <plugins>
            <plugin>
                <groupId>org.eclipse.m2e</groupId>
                <artifactId>lifecycle-mapping</artifactId>
                <version>1.0.0</version>
                <configuration>
                    <lifecycleMappingMetadata>
                        <pluginExecutions>
                            <pluginExecution>
                                <pluginExecutionFilter>
                                    <groupId>org.codehaus.mojo</groupId>
                                    <artifactId>gwt-maven-plugin</artifactId>
                                    <versionRange>[2.4.0,)</versionRange>
                                    <goals>
                                        <goal>resources</goal>
                                        <goal>compile</goal>
                                        <goal>i18n</goal>
                                        <goal>generateAsync</goal>
                                    </goals>
                                </pluginExecutionFilter>
                                <action>
                                    <execute />
                                </action>
                            </pluginExecution>
                            <pluginExecution>
                                <pluginExecutionFilter>
                                    <groupId>org.apache.maven.plugins</groupId>
                                    <artifactId>maven-war-plugin</artifactId>
                                    <versionRange>[2.1.1,)</versionRange>
                                    <goals>
                                        <goal>exploded</goal>
                                    </goals>
                                </pluginExecutionFilter>
                                <action>
                                    <execute />
                                </action>
                            </pluginExecution>
                        </pluginExecutions>
                    </lifecycleMappingMetadata>
                </configuration>
            </plugin>
        </plugins>
    </pluginManagement>

    <plugins>

        <!-- GWT Maven Plugin -->
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>gwt-maven-plugin</artifactId>
            <version>2.6.0</version>
            <executions>
                <execution>
                    <goals>
                        <goal>resources</goal>
                        <goal>i18n</goal>
                        <goal>generateAsync</goal>
                        <goal>compile</goal>
                        <goal>test</goal>
                    </goals>
                </execution>
            </executions>
            <!-- Plugin configuration. There are many available options, see gwt-maven-plugin documentation at codehaus.org -->
            <configuration>
                <!-- URL that should be automatically opened in the GWT shell (gwt:run). -->
                <runTarget>index.html</runTarget>
                <module>com.company.App</module>
                <hostedWebapp>${webappDirectory}</hostedWebapp>
                <i18nMessagesBundle>com.company.web.client.Messages</i18nMessagesBundle>
                <compileSourcesArtifacts>
                    <compileSourcesArtifact>com.company:protocol</compileSourcesArtifact>
                </compileSourcesArtifacts>
            </configuration>
        </plugin>

        <!-- Copy static web files before executing gwt:run -->
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.1.1</version>
            <executions>
                <execution>
                    <phase>compile</phase>
                    <goals>
                        <goal>exploded</goal>
                    </goals>
                </execution>
            </executions>
            <configuration>
                <webappDirectory>${webappDirectory}</webappDirectory>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>findbugs-maven-plugin</artifactId>
            <version>2.5.2</version>
            <configuration>
                <excludeFilterFile>findbugs-exclude.xml</excludeFilterFile>
            </configuration>
        </plugin>

        <plugin>
            <artifactId>maven-eclipse-plugin</artifactId>
            <version>2.7</version>  <!-- Note 2.8 does not work with AspectJ aspect path -->
            <configuration>
                <downloadSources>true</downloadSources>
                <downloadJavadocs>false</downloadJavadocs>
                <wtpversion>2.0</wtpversion>
                <additionalBuildcommands>
                    <buildCommand>
                        <name>com.google.gwt.eclipse.core.gwtProjectValidator</name>
                    </buildCommand>
                </additionalBuildcommands>
                <additionalProjectnatures>
                    <projectnature>com.google.gwt.eclipse.core.gwtNature</projectnature>
                </additionalProjectnatures>
            </configuration>
        </plugin>

    </plugins>
</build>
</project>

提前感谢您提供我忽略的任何细节。

【问题讨论】：

标签： maven gwt compilation gwt-super-dev-mode

【解决方案1】：

Here 是 Thomas Broyer 的一篇文章，解释了 SuperDevMode 工作流程。

在浏览器的 DevTools 下的 Network 选项卡中，编译完成时是否有 Status Ok 的“gwtSourcemap.json”请求？

顺便说一句，如果您在服务器部分（不是 GWT 客户端部分）进行更改，您必须在正常的 DevMode 下重新启动服务器。

希望对你有帮助。

【讨论】：