dubbo 服务的consumer client 调用堆栈 调用链 -- 学习dubbo启动后执行逻辑和代码

重要概念:

InvokerInvocationHandler

概念直接逻辑关系,见

dubbo参数调优说明

(dubbo 连接池 线程池模型. http://blog.csdn.net/youaremoon/article/details/51884644)

2. 源代码角度看  客户端连接池

   从Consumer分析Dubbo调用链

   默认情况下都是共享连接的，也就是Consumer和Provider之间不管有多少个Service，都只共享一条连接：

   getSharedClient 方法

初始化流:

• 
  

• ReferenceBean.getObject() (com.alibaba.dubbo.config.spring)
• ReferenceConfig.createProxy(Map)(3 usages) (com.alibaba.dubbo.config)
• 
  
• DubboProtocol.getClients(URL) (com.alibaba.dubbo.rpc.protocol.dubbo)DubboProtocol.refer(Class, URL) (com.alibaba.dubbo.rpc.protocol.dubbo
• 到DubboInvoker 初始化 phil NOTE 1个ReferenceBean对应 1个DubboProtocol 对应一个 url 接口 多个DubboInvoker
  
• Exchangers.connect(URL, ExchangeHandler) (com.alibaba.dubbo.remoting.exchange)
• NettyTransporter.connect(URL, ChannelHandler) (com.alibaba.dubbo.remoting.transport.netty)
• NettyClient.NettyClient(URL, ChannelHandler) (com.alibaba.dubbo.remoting.transport.netty)
• AbstractClient.connect() (com.alibaba.dubbo.remoting.transport)
• 
  

dubboProtocol协议里的invokers 何时被调用?

List<Filter> filters = ExtensionLoader.getExtensionLoader(Filter.class).getActivateExtension(invoker.getUrl(), key, group);

被组装到 filter 链里了.

因为 channel 被共享. 多个线程同时使用同一个 channel, 如何做到并发安全?

"main@1" prio=5 tid=0x1 nid=NA runnable

  java.lang.Thread.State: RUNNABLE
      at com.alibaba.dubbo.remoting.transport.netty.NettyChannel.send(NettyChannel.java:99)
      at com.alibaba.dubbo.remoting.transport.AbstractClient.send(AbstractClient.java:275)
      at com.alibaba.dubbo.remoting.transport.AbstractPeer.send(AbstractPeer.java:51)
      at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeChannel.request(HeaderExchangeChannel.java:112)
      at com.alibaba.dubbo.remoting.exchange.support.header.HeaderExchangeClient.request(HeaderExchangeClient.java:91)
      at com.alibaba.dubbo.rpc.protocol.dubbo.ReferenceCountExchangeClient.request(ReferenceCountExchangeClient.java:81)
      at com.alibaba.dubbo.rpc.protocol.dubbo.DubboInvoker.doInvoke(DubboInvoker.java:96)
      at com.alibaba.dubbo.rpc.protocol.AbstractInvoker.invoke(AbstractInvoker.java:144)
      at com.alibaba.dubbo.rpc.listener.ListenerInvokerWrapper.invoke(ListenerInvokerWrapper.java:74)
      at com.alibaba.dubbo.rpc.protocol.dubbo.filter.FutureFilter.invoke(FutureFilter.java:53)
      at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)
      at com.alibaba.dubbo.monitor.support.MonitorFilter.invoke(MonitorFilter.java:75)
      at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)
      at com.alibaba.dubbo.rpc.filter.ConsumerContextFilter.invoke(ConsumerContextFilter.java:48)
      at com.alibaba.dubbo.rpc.protocol.ProtocolFilterWrapper$1.invoke(ProtocolFilterWrapper.java:91)
      at com.alibaba.dubbo.rpc.protocol.InvokerWrapper.invoke(InvokerWrapper.java:53)
      at com.alibaba.dubbo.rpc.cluster.support.FailoverClusterInvoker.doInvoke(FailoverClusterInvoker.java:77)
      at com.alibaba.dubbo.rpc.cluster.support.AbstractClusterInvoker.invoke(AbstractClusterInvoker.java:227)
      at com.alibaba.dubbo.rpc.cluster.support.wrapper.MockClusterInvoker.invoke(MockClusterInvoker.java:72)
      at com.alibaba.dubbo.rpc.proxy.InvokerInvocationHandler.invoke(InvokerInvocationHandler.java:52)
      at com.alibaba.dubbo.common.bytecode.proxy0.getCanReceiptAmount(proxy0.java:-1)
      at com.liangjian.pay.dubboself.SelfConsumer.test_can(SelfConsumer.java:41)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:-1)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:601)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
      at mockit.integration.junit4.internal.JUnit4TestRunnerDecorator.executeTestMethod(JUnit4TestRunnerDecorator.java:142)
      at mockit.integration.junit4.internal.JUnit4TestRunnerDecorator.invokeExplosively(JUnit4TestRunnerDecorator.java:71)
      at mockit.integration.junit4.internal.MockFrameworkMethod.invokeExplosively(MockFrameworkMethod.java:40)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
      at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
      at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)
      at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234)
      at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74)