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service.html
12
service.html
@@ -28,7 +28,7 @@
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<p> Service 是Redkale最核心的组件,依赖于Convert、SNCP协议、Resource依赖注入。Service主要处理业务逻辑和操作数据层,是微服务架构中的单一原子服务。每一个Service实例分两种模式: <b>本地模式</b>和<b>远程模式</b>。其模式由 conf/application.xml 文件来配置。使用者在调用过程中通常不需要区分当前Service实例是哪种模式。<br/>
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为了能确保本地模式与远程模式自由切换,对Service的实现类有一定的约束: <br/>
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1、Service实现类会被继承,不能修饰为 <b>final</b> <br/>
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2、带@MultiRun注解的方法会被重载,不能修饰为 <b>final</b> <br/>
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2、带@RpcMultiRun注解的方法会被重载,不能修饰为 <b>final</b> <br/>
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Redkale进程启动时扫描可加载的Service实现类,根据配置文件配置的模式采用JDK 8内置的ASM技术动态生成相应的Service临时类进行实例化,并注册到ResourceFactory同其他Service、Servlet依赖注入。
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</p>
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@@ -71,13 +71,13 @@
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<span class="o">}</span>
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<span class="c1">//注册</span>
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<span class="nd">@MultiRun</span>
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<span class="nd">@RpcMultiRun</span>
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<span class="kd">public</span> <span class="kt">void</span> <span class="nf">register</span><span class="o">(</span><span class="n">UserInfo</span> <span class="n">user</span><span class="o">)</span> <span class="o">{</span>
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<span class="k">this</span><span class="o">.</span><span class="na">users</span><span class="o">.</span><span class="na">put</span><span class="o">(</span><span class="n">user</span><span class="o">.</span><span class="na">getUserid</span><span class="o">(),</span> <span class="n">user</span><span class="o">);</span>
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<span class="o">}</span>
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<span class="c1">//更新用户名</span>
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<span class="nd">@MultiRun</span><span class="o">(</span><span class="n">diffrun</span> <span class="o">=</span> <span class="kc">false</span><span class="o">)</span>
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<span class="nd">@RpcMultiRun</span><span class="o">(</span><span class="n">diffrun</span> <span class="o">=</span> <span class="kc">false</span><span class="o">)</span>
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<span class="kd">public</span> <span class="n">UserInfo</span> <span class="nf">updateUsername</span><span class="o">(</span><span class="kt">int</span> <span class="n">userid</span><span class="o">,</span> <span class="n">String</span> <span class="n">username</span><span class="o">)</span> <span class="o">{</span>
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<span class="n">UserInfo</span> <span class="n">user</span> <span class="o">=</span> <span class="k">this</span><span class="o">.</span><span class="na">users</span><span class="o">.</span><span class="na">get</span><span class="o">(</span><span class="n">userid</span><span class="o">);</span>
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<span class="k">if</span> <span class="o">(</span><span class="n">user</span> <span class="o">!=</span> <span class="kc">null</span><span class="o">)</span> <span class="n">user</span><span class="o">.</span><span class="na">setUsername</span><span class="o">(</span><span class="n">username</span><span class="o">);</span>
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@@ -139,8 +139,8 @@
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<span class="o">}</span>
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<span class="o">}</span>
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</pre></div>
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<p> 由以上等价的代码可以看出来,本地模式Service会重载被@MultiRun注解的方法。@MultiRun有以下几个参数: </p>
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<div class="highlight"><pre><span class="kd">public</span> <span class="nd">@interface</span> <span class="n">MultiRun</span> <span class="o">{</span>
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<p> 由以上等价的代码可以看出来,本地模式Service会重载被@RpcMultiRun注解的方法。@RpcMultiRun有以下几个参数: </p>
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<div class="highlight"><pre><span class="kd">public</span> <span class="nd">@interface</span> <span class="n">RpcMultiRun</span> <span class="o">{</span>
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<span class="kt">boolean</span> <span class="nf">selfrun</span><span class="o">()</span> <span class="k">default</span> <span class="kc">true</span><span class="o">;</span> <span class="c1">//当前本地实例是否运行指定操作;只有当指定操作的方法的返回值为void时,该值才能为true,否则忽略。</span>
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@@ -150,7 +150,7 @@
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<span class="kt">boolean</span> <span class="nf">async</span><span class="o">()</span> <span class="k">default</span> <span class="kc">true</span><span class="o">;</span> <span class="c1">//分布式运行是否采用异步模式</span>
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<span class="o">}</span> </pre></div>
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<p> 在动态生成的远程模式UserService时会根据不同参数生成相应的方法。若一个Service类没有含@MultiRun注解的方法,那么动态类只会重载toString方法。当UserService服务仅需要部署一个进程,由于没有其他等同服务的进程因此在UserService实例化时_redkale_client会赋值为null。</p>
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<p> 在动态生成的远程模式UserService时会根据不同参数生成相应的方法。若一个Service类没有含@RpcMultiRun注解的方法,那么动态类只会重载toString方法。当UserService服务仅需要部署一个进程,由于没有其他等同服务的进程因此在UserService实例化时_redkale_client会赋值为null。</p>
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<div class="highlight"><pre><span class="nt"><resources></span>
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<span class="nt"><group</span> <span class="na">name=</span><span class="s">"GROUP-A"</span><span class="nt">></span>
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<span class="nt"><node</span> <span class="na">addr=</span><span class="s">"192.168.10.111"</span> <span class="na">port=</span><span class="s">"7070"</span><span class="nt">/></span>
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