搭建dubbo+zookeeper+spring环境-环境篇

环境：mac，Java8，tomcat8

安装zookeeper

安装zookeeper

brew install zookeeper

zookeeper的配置文件在/usr/local/etc/zookeeper/zoo.cfg

启动zookeeper

brew services start zookeeper

windows的同学可以参考：Windows安装和使用zookeeper

编译dubbo

下载dubbo源码：

git clone https://github.com/alibaba/dubbo.git
cd dubbo
git co dubbo-2.5.3
mvn clean install -Dmaven.test.skip

提示错误：

[INFO] Scanning for projects...
Downloading: http://code.alibabatech.com/mvn/releases/com/alibaba/opensesame/2.0/opensesame-2.0.pom
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[FATAL] Non-resolvable parent POM for com.alibaba:dubbo-parent:2.5.3: Could not transfer artifact com.alibaba:opensesame:pom:2.0 from/to opensesame.releases (http://code.alibabatech.com/mvn/releases): Connect to code.alibabatech.com:80 [code.alibabatech.com/119.38.217.15] failed:

发现这丫的域名根本就挂了。。。参考dubbo实践（二）自己动手编译源码，这里我们需要自己安装opensesame这个项目：

git clone https://github.com/alibaba/opensesame.git
cd opensesame
mvn install

然后再进入dubbo目录下执行mvn clean install -Dmaven.test.skip还是提示错误：

[ERROR] Failed to execute goal on project dubbo-common: Could not resolve dependencies for project com.alibaba:dubbo-common:jar:2.5.3: Failed to collect dependencies at com.alibaba:fastjson:jar:1.1.8: Failed to read artifact descriptor for com.alibaba:fastjson:jar:1.1.8: Could not transfer artifact com.alibaba:fastjson:pom:1.1.8 from/to opensesame.releases (http://code.alibabatech.com/mvn/releases): Connect to code.alibabatech.com:80 [code.alibabatech.com/119.38.217.15] failed: Connection refused -> [Help 1]

这是因为opensesame的pom指定了去阿里的仓库上下载，而阿里的仓库现在挂了，所以，修改opensesame的pom文件，注释掉repositories，distributionManagement，pluginRepositories这些标签。还得注释dubbo-parent的pom.xml中的repositories标签。

再次install还是失败。。说com.alibaba:fastjson:pom:1.1.8找不到。上mvnrepository看一下，发现maven仓库上根本就没有这个版本。。。修改dubbo-parent的pom.xml的

<fastjson_version>1.1.8</fastjson_version>

为

<fastjson_version>1.1.15</fastjson_version>

再次install终于成功。

运行dubbo控制台

cd dubbo/dubbo-admin
mvn jetty:run -Ddubbo.registry.address=zookeeper://127.0.0.1:2181

遇到错误：

ERROR context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'uriBrokerService': Cannot create inner bean '(inner bean)' of type [com.alibaba.citrus.service.uribroker.impl.URIBrokerServiceImpl$URIBrokerInfo] while setting bean property 'brokers' with key [0]; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#25': Cannot create inner bean 'server' of type [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker] while setting constructor argument; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'server': Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'URIType' of bean class [com.alibaba.citrus.service.uribroker.uri.GenericURIBroker]: Bean property 'URIType' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?

参考：2.5.4-SNAPSHOT dubbo admin error · Issue #50 · alibaba/dubbo，修改如下：

1、webx的依赖改为3.1.6版；

<dependency>
    <groupId>com.alibaba.citrus</groupId>
    <artifactId>citrus-webx-all</artifactId>
    <version>3.1.6</version>
</dependency>

2、添加velocity的依赖，我用了1.7；

<dependency>
    <groupId>org.apache.velocity</groupId>
    <artifactId>velocity</artifactId>
    <version>1.7</version>
</dependency>

3、对依赖项dubbo添加exclusion，避免引入旧spring

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>dubbo</artifactId>
    <version>${project.parent.version}</version>
    <exclusions>
        <exclusion>
            <groupId>org.springframework</groupId>
            <artifactId>spring</artifactId>
        </exclusion>
    </exclusions>
</dependency>

4、webx已有spring 3以上的依赖，因此注释掉dubbo-admin里面的spring依赖

<!--<dependency>-->
    <!--<groupId>org.springframework</groupId>-->
    <!--<artifactId>spring</artifactId>-->
<!--</dependency>-->

再次运行，错误：

[ERROR] Failed to execute goal org.mortbay.jetty:maven-jetty-plugin:6.1.26:run (default-cli) on project dubbo-admin: Failure: Address already in use -> [Help 1]

修改POM：

<build>
    <plugins>
        <plugin>
            <groupId>org.mortbay.jetty</groupId>
            <artifactId>maven-jetty-plugin</artifactId>
            <version>${jetty_version}</version>
            <configuration>
                <contextPath>/</contextPath>
                <scanIntervalSeconds>10</scanIntervalSeconds>
                <connectors>
                    <connector implementation="org.mortbay.jetty.nio.SelectChannelConnector">
                        <port>8081</port>
                        <maxIdleTime>60000</maxIdleTime>
                    </connector>
                </connectors>
            </configuration>
        </plugin>
    </plugins>
</build>

把原来的8080修改为8081。范围http://localhost:8081/即可看到dubbo控制台。

成功。

如果你和我一样遇到错误，打开一个服务，页面显示404，同时报错：

INFO interceptor.RestfuleUrlRewriter -  [DUBBO] REWRITE restful uri /governance/services to uri governance/services.htm?{_type=services, _path=governance/services}, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.33.1
 INFO interceptor.AuthorizationValve -  [DUBBO] AuthorizationValve of uri: /governance/services, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.33.1
 INFO interceptor.RestfuleUrlRewriter -  [DUBBO] REWRITE restful uri /governance/services/DemoServer/providers to uri governance/services.htm?{_method=DemoServer/providers, _type=services, _path=governance/services/DemoServer/providers}, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.33.1
 INFO interceptor.AuthorizationValve -  [DUBBO] AuthorizationValve of uri: /governance/services/DemoServer/providers, dubbo version: 2.5.4-SNAPSHOT, current host: 192.168.33.1
ERROR valve.HandleExceptionValve - Failed to process request /governance/services/DemoServer/providers, the root cause was TemplateNotFoundException: Could not find template "/screen/services"
com.alibaba.citrus.service.pipeline.PipelineException: Failed to invoke Valve[#3/3, level 3]: com.alibaba.citrus.turbine.pipeline.valve.RenderTemplateValve#7f1581bb:RenderTemplateValve

说明你暴露了一个顶级包下的接口类似于DemoServer，如果你暴露的是com.xx.DemoServer就不会有这个问题。这个应该是dubbo的一个bug。

环境搭建好了，接下来我们写一个简单的服务提供者和服务消费者的例子。请看搭建dubbo+zookeeper+spring环境-编码篇

参考资料

• Dubbo与Zookeeper、SpringMVC整合和使用（负载均衡、容错） - 在前进的路上 - 博客频道 - CSDN.NET
• dubbo实践（二）自己动手编译源码
• alibaba/dubbo: Dubbo is a distributed, high performance RPC framework enpowering applications with service import/export capabilities.
• 2.5.4-SNAPSHOT dubbo admin error · Issue #50 · alibaba/dubbo
• code.alibabatech.com不能访问了，是阿里不让用了吗 · Issue #22 · alibaba/dubbo