Question

使用appengine模块意味着创建动态Web应用程序而不是通常的appengine Web应用程序项目。云端点与通常的appengine Web应用程序项目配合良好，但这些项目不支持appengine模块。

问题是，如果我尝试在动态Web应用程序上生成云端点客户端库，我会收到错误＆＃34;而不是App Engine项目＆＃34;。

有没有办法让动态Web应用程序被识别为App Engine项目，以便可以在其上生成云端点客户端库？

Answer 1

目前处理同样的问题，我想我已经找到了一个解决方案，其中包含以下设置（使用maven进行java项目）：

在project-root pom.xml中：定义一些常用值（如您正在使用的appengine版本），pom包装和模块，尤其是EAR文件：

<?xml version="1.0" encoding="UTF-8"?>
<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.example</groupId>
<artifactId>myproject-root</artifactId>
<version>1.0</version>
<packaging>pom</packaging>
<name>myproject-root</name>

<properties>
    <appengine.app.version>1</appengine.app.version>
    <appengine.target.version>1.9.11</appengine.target.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

<modules>
    <module>myproject-ear</module>
    <module>myproject-cloud-endpoints</module>
    <module>myproject-backend</module>
</modules>

</project>

EAR模块的pom.xml当然应该包含EAR包装，但也包括＃34; war＆＃34;对其他模块的类型依赖关系以及＆＃34;解包类型＆＃34; maven-ear插件的选项设置为＆＃34; war＆＃34;：

<?xml version="1.0" encoding="UTF-8"?>
<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>

<parent>
    <groupId>com.example</groupId>
    <artifactId>myproject-root</artifactId>
    <version>1.0</version>
</parent>

<groupId>com.example</groupId>
<artifactId>myproject-ear</artifactId>
<version>1.0</version>
<packaging>ear</packaging>

<name>myproject-ear</name>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>2.5.1</version>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-ear-plugin</artifactId>
            <version>2.9</version>
            <configuration>
                <version>5</version>
                <defaultLibBundleDir>lib</defaultLibBundleDir>
                <unpackTypes>war</unpackTypes>
                <applicationXml>${project.basedir}/src/main/application/META-INF/maven-application.xml</applicationXml>
            </configuration>
        </plugin>
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>${appengine.target.version}</version>
        </plugin>
    </plugins>
</build>

<dependencies>
    <dependency>
        <groupId>com.example</groupId>
        <artifactId>myproject-cloud-endpoints</artifactId>
        <version>1.0</version>
        <type>war</type>
    </dependency>
    <dependency>
        <groupId>com.example</groupId>
        <artifactId>myproject-backend</artifactId>
        <version>1.0</version>
        <type>war</type>
    </dependency>
</dependencies>
<properties/>
</project>

最后，＆＃34;云端点＆＃34;应该将pom.xml配置为基本的云端点webapp项目，使用＆＃34; war＆＃34;包装

<?xml version="1.0" encoding="UTF-8"?>
<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>

<parent>
    <groupId>com.example</groupId>
    <artifactId>myproject-root</artifactId>
    <version>1.0</version>
</parent>

<groupId>com.example</groupId>
<artifactId>myproject-cloud-endpoints</artifactId>
<version>1.0</version>
<packaging>war</packaging>

<name>myproject-cloud-endpoints</name>

<dependencies>
    <!-- Compile/runtime dependencies -->
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-api-1.0-sdk</artifactId>
        <version>${appengine.target.version}</version>
    </dependency>
    <dependency>
        <groupId>com.google.appengine</groupId>
        <artifactId>appengine-endpoints</artifactId>
        <version>${appengine.target.version}</version>
    </dependency>
    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
        <scope>provided</scope>
    </dependency>
    <dependency>
        <groupId>javax.inject</groupId>
        <artifactId>javax.inject</artifactId>
        <version>1</version>
    </dependency>
</dependencies>


<build>
    <!-- for hot reload of the web application in devserver-->
    <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
    <plugins>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>versions-maven-plugin</artifactId>
            <version>2.1</version>
            <executions>
                <execution>
                    <phase>compile</phase>
                    <goals>
                        <goal>display-dependency-updates</goal>
                        <goal>display-plugin-updates</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <version>3.1</version>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.7</source>
                <target>1.7</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.4</version>
            <configuration>
                <webXml>${project.build.directory}/generated-sources/appengine-endpoints/WEB-INF/web.xml</webXml>
                <webResources>
                    <resource>
                        <!-- this is relative to the pom.xml directory -->
                        <directory>${project.build.directory}/generated-sources/appengine-endpoints</directory>
                        <!-- the list has a default value of ** -->
                        <includes>
                            <include>WEB-INF/*.discovery</include>
                            <include>WEB-INF/*.api</include>
                        </includes>
                    </resource>
                </webResources>
            </configuration>
        </plugin>
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>${appengine.target.version}</version>
            <configuration>
                <enableJarClasses>false</enableJarClasses>
                <!-- Comment in the below snippet to bind to all IPs instead of just localhost -->
                <!-- address>0.0.0.0</address>
                <port>8080</port -->
                <!-- Comment in the below snippet to enable local debugging with a remove debugger
                     like those included with Eclipse or IntelliJ -->
                <!-- jvmFlags>
                  <jvmFlag>-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n</jvmFlag>
                </jvmFlags -->
            </configuration>
            <executions>
                <execution>
                    <goals>
                        <goal>endpoints_get_discovery_doc</goal>
                    </goals>
                </execution>
            </executions>
        </plugin>
    </plugins>
</build>

构建此项目，您应该能够通过Eclipse生成您的云端点客户端库管理程序：右键单击＆＃34; cloud-endpoints＆＃34; project =＆gt; ＆＃34; Google App Engine WTP ＆＃34; =＆GT; ＆＃34;生成Cloud Endpoint客户端库＆＃34;将生成myproject-cloud-endpoints/endpoint-libs/中所需的所有内容。

希望有所帮助！

Answer 2

这个案例的解决方案是在FrançoisPOYER的回答中，但这里是一个没有maven假设的版本。

如果您使用WTP创建和管理您的appengine应用程序和EAR：

确保您处于Java EE透视图中
右键点击您的云端点项目=＆gt; “ Google App Engine WTP ”=＆gt; “生成云端点客户端库”

如果您没有看到 Google App Engine WTP 而您只看到“Google”，则可能您没有选择Java EE视角。

您不必为此使用maven，只需使用WTP创建和管理您的EAR和appengine应用程序。

是否可以使用appengine模块和云端点？

2 个答案: