分布式架构探索 - 2. WebService RPC框架之Apache CXF

Apache CXF是一个开源的WebService RPC框架。

例子:

1. 新建一个maven web项目, 添加pom

如下:

<?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.genesis.architect</groupId>
    <artifactId>cxf-demo</artifactId>
    <version>1.0-SNAPSHOT</version>

    <packaging>war</packaging>

    <properties>
        <java.version>1.8</java.version>
        <maven.compiler.source>1.8</maven.compiler.source>
        <maven.compiler.target>1.8</maven.compiler.target>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <cxf.version>3.1.7</cxf.version>
        <spring.version>4.0.9.RELEASE</spring.version>
        <junit.version>4.12</junit.version>
        <jstl.version>1.2</jstl.version>
        <servlet-api.version>2.5</servlet-api.version>
        <jsp-api.version>2.0</jsp-api.version>
    </properties>

    <!-- pom.xml增加多环境配置的配置 -->
    <profiles>
        <profile>
            <id>dev</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <package.environment>development</package.environment>
            </properties>
        </profile>
        <profile>
            <id>pro</id>
            <properties>
                <package.environment>production</package.environment>
            </properties>
        </profile>
        <profile>
            <id>test</id>
            <properties>
                <package.environment>testing</package.environment>
            </properties>
        </profile>
    </profiles>

    <dependencies>
        <!-- spring -->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${spring.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context-support</artifactId>
            <version>${spring.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-frontend-jaxws</artifactId>
            <version>${cxf.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-transports-http</artifactId>
            <version>${cxf.version}</version>
        </dependency>
        <dependency>
            <groupId>org.apache.cxf</groupId>
            <artifactId>cxf-rt-transports-http-jetty</artifactId>
            <version>${cxf.version}</version>
        </dependency>

        <!-- servlet start -->
        <dependency>
            <groupId>jstl</groupId>
            <artifactId>jstl</artifactId>
            <version>${jstl.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <version>${servlet-api.version}</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>jsp-api</artifactId>
            <version>${jsp-api.version}</version>
            <scope>provided</scope>
        </dependency>
        <!-- servlet end -->
</dependencies>

    <build>
        <finalName>cxf-demo</finalName>

        <resources>

            <resource>
                <directory>src/main/resources/${package.environment}</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.tld</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                    <include>**/*.tld</include>
                </includes>
                <filtering>false</filtering>
            </resource>
        </resources>

        <plugins>
            <!-- Jetty 服务器 -->
            <plugin>
                <groupId>org.eclipse.jetty</groupId>
                <artifactId>jetty-maven-plugin</artifactId>
                <version>9.2.2.v20140723</version>
                <configuration>
                    <httpConnector>
                        <port>8080</port>
                    </httpConnector>
                    <webAppConfig>
                        <contextPath>/${project.artifactId}</contextPath>
                    </webAppConfig>
                    <scanIntervalSeconds>2</scanIntervalSeconds>
                </configuration>
            </plugin>

            <!-- tomcat 服务器 -->
            <!--<plugin>-->
                <!--<groupId>org.apache.tomcat.maven</groupId>-->
                <!--<artifactId>tomcat7-maven-plugin</artifactId>-->
                <!--<configuration>-->
                    <!--<port>8080</port>-->
                    <!--<path>/${project.artifactId}</path>-->
                <!--</configuration>-->
            <!--</plugin>-->

            <!--打war包到指定的目录下 -->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-dependency-plugin</artifactId>
                <version>2.8</version>
                <executions>
                    <execution>
                        <id>copy-war</id>
                        <phase>package</phase>
                        <goals>
                            <goal>copy</goal>
                        </goals>
                        <configuration>
                            <artifactItems>
                                <artifactItem>
                                    <groupId>${project.groupId}</groupId>
                                    <artifactId>${project.artifactId}</artifactId>
                                    <version>${project.version}</version>
                                    <type>${project.packaging}</type>
                                </artifactItem>
                            </artifactItems>
                            <!-- <outputDirectory>${dist.console.war.dir}</outputDirectory> -->
                            <!--指定war包保存地址 -->
                            <outputDirectory>${basedir}/WAR/${package.environment}</outputDirectory>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

2. 定义远程服务接口，并用@WebService标明是一个远程的WebService

package com.genesis.architect.cxf.service;

import javax.jws.WebService;

/**
 * @author KG created on 16/12/4
 */
@WebService
public interface HelloService {

    public String sayHello(String content);

}

3. 远程服务的实现(通过endpointInterface指明对应的接口)

package com.genesis.architect.cxf.service;

import javax.jws.WebService;

/**
 * @author KG created on 16/12/4
 */
@WebService(endpointInterface = "com.genesis.architect.cxf.service.HelloService")
public class HelloServiceImpl implements HelloService {

    @Override
    public String sayHello(String content) {
        return "hello," + content;
    }
}

4. 配置WebService的终结点实现，并配置地址映射

cxf-server.xml

<beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:jaxws="http://cxf.apache.org/jaxws"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">

    <import resource="classpath:META-INF/cxf/cxf.xml"/>
    <import resource="classpath:META-INF/cxf/cxf-servlet.xml"/>
    <jaxws:endpoint id="helloWorld" implementor="com.genesis.architect.cxf.service.HelloServiceImpl" address="/HelloWorld"/>

</beans>

5. web.xml配置WebService监听，添加ws路由映射

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns="http://java.sun.com/xml/ns/javaee"
         xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
         id="WebApp_ID" version="2.5">

    <display-name>cxf-spring</display-name>

    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>classpath:cxf-server.xml</param-value>
    </context-param>

    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>

    <servlet>
        <servlet-name>CXFServlet</servlet-name>
        <servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>CXFServlet</servlet-name>
        <url-pattern>/ws/*</url-pattern>
    </servlet-mapping>

</web-app>

6. 编写客户端测试

package com.genesis.architect.cxf.client;

import com.genesis.architect.cxf.service.HelloService;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

/**
 * @author KG created on 16/12/4
 */
public class CxfClient {

    public static void main(String[] args) {
        ApplicationContext context = new ClassPathXmlApplicationContext("classpath:cxf-client.xml");
        HelloService client = (HelloService) context.getBean("helloClient");
        System.out.println(client.sayHello("Master HaKu"));
    }

}

7. 客户端调用远程服务的配置文件(cxf-client.xml)

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:jaxws="http://cxf.apache.org/jaxws"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://cxf.apache.org/jaxws http://cxf.apache.org/schemas/jaxws.xsd">

    <jaxws:client id="helloClient"
                  serviceClass="com.genesis.architect.cxf.service.HelloService"
                  address="http://localhost:8080/cxf-demo/ws/HelloWorld" />
</beans>

8. 运行结果

访问：

http://localhost:8080/cxf-demo/ws/HelloWorld?wsdl

可以看到soap的wsdl内容

运行client:

hello,Master HaKu