dubbo 服务导出
NettyServer启动(注意这里要区分NettyClient) handler包装过程
默认AllDipacher AllChannelHandler FixThreadPool
protected ChannelHandler wrapInternal(ChannelHandler handler, URL url) {
return new MultiMessageHandler(
new HeartbeatHandler(
ExtensionLoader.getExtensionLoader(Dispather.class).getAdaptiveExtension().dispath(handler, url)
));
}
这还有一堆
public ExchangeServer bind(URL url, ExchangeHandler handler) throws RemotingException {
return new HeaderExchangeServer(Transporters.bind(url, new DecodeHandler(new HeaderExchangeHandler(handler))));
}
整理一下handler链
NettyServer
.MultiMessageHandler
.HeartbeatHandler //心跳检测
.AllChannelHandler
.TheadPoolExcutor //线程池
.DecodeHandler
.HeaderExchangeHandler
.DubboProtocol //这里是业务逻辑和通信的分割线
测试代码入口
用HelloService举例, 从com.alibaba.dubbo.config.ServiceConfig#export进入dubbo服务导出源码
public class Provider {
public static void main(String[] args) throws IOException {
ApplicationConfig applicationConfig = new ApplicationConfig("demo");
ProtocolConfig protocolConfig = new ProtocolConfig("dubbo");
protocolConfig.setPort(20881);
RegistryConfig registryConfig = new RegistryConfig("localhost:2181");
registryConfig.setProtocol("zookeeper");
registryConfig.setGroup("demo");
init(applicationConfig, protocolConfig, registryConfig, new SyncHelloService(), "sync");
System.in.read();
}
private static void init(ApplicationConfig applicationConfig, ProtocolConfig protocolConfig, RegistryConfig registryConfig, HelloService instance, String group) {
ServiceConfig helloService = new ServiceConfig();
helloService.setApplication(applicationConfig);
helloService.setProtocol(protocolConfig);
helloService.setRegistry(registryConfig);
helloService.setInterface(HelloService.class);
helloService.setRef(instance);
helloService.setGroup(group);
helloService.setVersion("1.0.0");
//export 是服务导出入口
helloService.export();
}
}
一堆配置检查 没什么好看的 最后进入doExport方法
public synchronized void export() {
if (provider != null) {
if (export == null) {
export = provider.getExport();
}
if (delay == null) {
delay = provider.getDelay();
}
}
if (export != null && ! export.booleanValue()) {
return;
}
if (delay != null && delay > 0) {
Thread thread = new Thread(new Runnable() {
public void run() {
try {
Thread.sleep(delay);
} catch (Throwable e) {
}
doExport();
}
});
thread.setDaemon(true);
thread.setName("DelayExportServiceThread");
thread.start();
} else {
doExport();
}
}
加载注册中心URL 在每个注册中都注册一遍服务
注册中心URL示例:
registry://127.0.0.1:2181/com.alibaba.dubbo.registry.RegistryService?application=demo&dubbo=3.2.2&group=asyncdemo&pid=14476®istry=zookeeper×tamp=1562576090107
private void doExportUrls() {
List registryURLs = loadRegistries(true);
for (ProtocolConfig protocolConfig : protocols) {
doExportUrlsFor1Protocol(protocolConfig, registryURLs);
}
}
3 组装URL
这个方法有两百多行 其实做的事情并不多
把各种信息放在map里面 比如side/版本/时间戳/进程号
比较核心的操作是
String[] methods = Wrapper.getWrapper(interfaceClass).getMethodNames();
生成了一个wrapper类,wrapper包装了接口的实际实现
private void doExportUrlsFor1Protocol(ProtocolConfig protocolConfig, List registryURLs) {
String name = protocolConfig.getName();
if (name == null || name.length() == 0) {
name = "dubbo";
}
String host = protocolConfig.getHost();
if (provider != null && (host == null || host.length() == 0)) {
host = provider.getHost();
}
boolean anyhost = false;
if (NetUtils.isInvalidLocalHost(host)) {
anyhost = true;
try {
host = InetAddress.getLocalHost().getHostAddress();
} catch (UnknownHostException e) {
logger.warn(e.getMessage(), e);
}
if (NetUtils.isInvalidLocalHost(host)) {
if (registryURLs != null && registryURLs.size() > 0) {
for (URL registryURL : registryURLs) {
try {
Socket socket = new Socket();
try {
SocketAddress addr = new InetSocketAddress(registryURL.getHost(), registryURL.getPort());
socket.connect(addr, 1000);
host = socket.getLocalAddress().getHostAddress();
break;
} finally {
try {
socket.close();
} catch (Throwable e) {}
}
} catch (Exception e) {
logger.warn(e.getMessage(), e);
}
}
}
if (NetUtils.isInvalidLocalHost(host)) {
host = NetUtils.getLocalHost();
}
}
}
Integer port = protocolConfig.getPort();
if (provider != null && (port == null || port == 0)) {
port = provider.getPort();
}
final int defaultPort = ExtensionLoader.getExtensionLoader(Protocol.class).getExtension(name).getDefaultPort();
if (port == null || port == 0) {
port = defaultPort;
}
if (port == null || port <= 0) {
port = getRandomPort(name);
if (port == null || port < 0) {
port = NetUtils.getAvailablePort(defaultPort);
putRandomPort(name, port);
}
logger.warn("Use random available port(" + port + ") for protocol " + name);
}
Map map = new HashMap();
if (anyhost) {
map.put(Constants.ANYHOST_KEY, "true");
}
map.put(Constants.SIDE_KEY, Constants.PROVIDER_SIDE);
map.put(Constants.DUBBO_VERSION_KEY, Version.getVersion());
map.put(Constants.TIMESTAMP_KEY, String.valueOf(System.currentTimeMillis()));
if (ConfigUtils.getPid() > 0) {
map.put(Constants.PID_KEY, String.valueOf(ConfigUtils.getPid()));
}
appendParameters(map, application);
appendParameters(map, module);
appendParameters(map, provider, Constants.DEFAULT_KEY);
appendParameters(map, protocolConfig);
appendParameters(map, this);
if (methods != null && methods.size() > 0) {
for (MethodConfig method : methods) {
appendParameters(map, method, method.getName());
String retryKey = method.getName() + ".retry";
if (map.containsKey(retryKey)) {
String retryValue = map.remove(retryKey);
if ("false".equals(retryValue)) {
map.put(method.getName() + ".retries", "0");
}
}
List arguments = method.getArguments();
if (arguments != null && arguments.size() > 0) {
for (ArgumentConfig argument : arguments) {
//类型自动转换.
if(argument.getType() != null && argument.getType().length() >0){
Method[] methods = interfaceClass.getMethods();
//遍历所有方法
if(methods != null && methods.length > 0){
for (int i = 0; i < methods.length; i++) {
String methodName = methods[i].getName();
//匹配方法名称，获取方法签名.
if(methodName.equals(method.getName())){
Class[] argtypes = methods[i].getParameterTypes();
//一个方法中单个callback
if (argument.getIndex() != -1 ){
if (argtypes[argument.getIndex()].getName().equals(argument.getType())){
appendParameters(map, argument, method.getName() + "." + argument.getIndex());
}else {
throw new IllegalArgumentException("argument config error : the index attribute and type attirbute not match :index :"+argument.getIndex() + ", type:" + argument.getType());
}
} else {
//一个方法中多个callback
for (int j = 0 ;j argclazz = argtypes[j];
if (argclazz.getName().equals(argument.getType())){
appendParameters(map, argument, method.getName() + "." + j);
if (argument.getIndex() != -1 && argument.getIndex() != j){
throw new IllegalArgumentException("argument config error : the index attribute and type attirbute not match :index :"+argument.getIndex() + ", type:" + argument.getType());
}
}
}
}
}
}
}
}else if(argument.getIndex() != -1){
appendParameters(map, argument, method.getName() + "." + argument.getIndex());
}else {
throw new IllegalArgumentException("argument config must set index or type attribute.eg: (Arrays.asList(methods)), ","));
}
}
if (! ConfigUtils.isEmpty(token)) {
if (ConfigUtils.isDefault(token)) {
map.put("token", UUID.randomUUID().toString());
} else {
map.put("token", token);
}
}
if ("injvm".equals(protocolConfig.getName())) {
protocolConfig.setRegister(false);
map.put("notify", "false");
}
// 导出服务
String contextPath = protocolConfig.getContextpath();
if ((contextPath == null || contextPath.length() == 0) && provider != null) {
contextPath = provider.getContextpath();
}
URL url = new URL(name, host, port, (contextPath == null || contextPath.length() == 0 ? "" : contextPath + "/") + path, map);
if (ExtensionLoader.getExtensionLoader(ConfiguratorFactory.class)
.hasExtension(url.getProtocol())) {
url = ExtensionLoader.getExtensionLoader(ConfiguratorFactory.class)
.getExtension(url.getProtocol()).getConfigurator(url).configure(url);
}
String scope = url.getParameter(Constants.SCOPE_KEY);
//配置为none不暴露
if (! Constants.SCOPE_NONE.toString().equalsIgnoreCase(scope)) {
//配置不是remote的情况下做本地暴露 (配置为remote，则表示只暴露远程服务)
if (!Constants.SCOPE_REMOTE.toString().equalsIgnoreCase(scope)) {
exportLocal(url);
}
//如果配置不是local则暴露为远程服务.(配置为local，则表示只暴露远程服务)
if (! Constants.SCOPE_LOCAL.toString().equalsIgnoreCase(scope) ){
if (logger.isInfoEnabled()) {
logger.info("Export dubbo service " + interfaceClass.getName() + " to url " + url);
}
if (registryURLs != null && registryURLs.size() > 0
&& url.getParameter("register", true)) {
for (URL registryURL : registryURLs) {
url = url.addParameterIfAbsent("dynamic", registryURL.getParameter("dynamic"));
URL monitorUrl = loadMonitor(registryURL);
if (monitorUrl != null) {
url = url.addParameterAndEncoded(Constants.MONITOR_KEY, monitorUrl.toFullString());
}
if (logger.isInfoEnabled()) {
logger.info("Register dubbo service " + interfaceClass.getName() + " url " + url + " to registry " + registryURL);
}
Invoker invoker = proxyFactory.getInvoker(ref, (Class) interfaceClass, registryURL.addParameterAndEncoded(Constants.EXPORT_KEY, url.toFullString()));
Exporter exporter = protocol.export(invoker);
exporters.add(exporter);
}
} else {
Invoker invoker = proxyFactory.getInvoker(ref, (Class) interfaceClass, url);
Exporter exporter = protocol.export(invoker);
exporters.add(exporter);
}
}
}
this.urls.add(url);
}
4.生成wapper类 使用javasisit技术 动态生成wrapper类,一个wrapper类和一个接口对应,注意说的这里是接口,意味着就算有多个实现,也只生成一个wrapper类
4.1 缓存逻辑,避免重复创建
public static Wrapper getWrapper(Class c)
{
while( ClassGenerator.isDynamicClass(c) ) // can not wrapper on dynamic class.
c = c.getSuperclass();
if( c == Object.class )
return OBJECT_WRAPPER;
Wrapper ret = WRAPPER_MAP.get(c);
if( ret == null )
{
ret = makeWrapper(c);
WRAPPER_MAP.put(c,ret);
}
return ret;
}
4.2 生成动态wrapper
使用javasisit技术 生成某个接口对应的wrapper
代码比较长 可以先看看最终生成的wrapper长什么样
HelloService 对应的wrapper
关键是invokeMethod方法 把通用的invoke请求参数 链接到实现类的对象(第一个参数)对应的方法上
一个映射工作,为什么要花这么多逻辑去生成动态代码,这样的好处是运行是就没有必要再通过反射去调用方法了,毕竟用户只关心请求响应时间,不会关心服务启动时间.
public class Wrapper1 extends Wrapper implements DC {
public static String[] pns;
public static Map pts;
public static String[] mns;
public static String[] dmns;
public static Class[] mts0;
public static Class[] mts1;
public String[] getPropertyNames() {
return pns;
}
public boolean hasProperty(String var1) {
return pts.containsKey(var1);
}
public Class getPropertyType(String var1) {
return (Class)pts.get(var1);
}
public String[] getMethodNames() {
return mns;
}
public String[] getDeclaredMethodNames() {
return dmns;
}
public void setPropertyValue(Object var1, String var2, Object var3) {
try {
SyncHelloService var4 = (SyncHelloService)var1;
} catch (Throwable var6) {
throw new IllegalArgumentException(var6);
}
throw new NoSuchPropertyException("Not found property \"" + var2 + "\" filed or setter method in class qunar.tc.dubbo.async.provider.SyncHelloService.");
}
public Object getPropertyValue(Object var1, String var2) {
try {
SyncHelloService var3 = (SyncHelloService)var1;
} catch (Throwable var5) {
throw new IllegalArgumentException(var5);
}
throw new NoSuchPropertyException("Not found property \"" + var2 + "\" filed or getter method in class qunar.tc.dubbo.async.provider.SyncHelloService.");
}
public Object invokeMethod(Object var1, String var2, Class[] var3, Object[] var4) throws InvocationTargetException {
SyncHelloService var5;
try {
var5 = (SyncHelloService)var1;
} catch (Throwable var8) {
throw new IllegalArgumentException(var8);
}
try {
if ("main".equals(var2) && var3.length == 1) {
SyncHelloService.main((String[])var4[0]);
return null;
}
if ("sayHello".equals(var2) && var3.length == 1) {
return var5.sayHello((String)var4[0]);
}
} catch (Throwable var9) {
throw new InvocationTargetException(var9);
}
throw new NoSuchMethodException("Not found method \"" + var2 + "\" in class qunar.tc.dubbo.async.provider.SyncHelloService.");
}
public Wrapper1() {
}
}
makeWrapper 源码
private static Wrapper makeWrapper(Class c)
{
if( c.isPrimitive() )
throw new IllegalArgumentException("Can not create wrapper for primitive type: " + c);
String name = c.getName();
ClassLoader cl = ClassHelper.getClassLoader(c);
StringBuilder c1 = new StringBuilder("public void setPropertyValue(Object o, String n, Object v){ ");
StringBuilder c2 = new StringBuilder("public Object getPropertyValue(Object o, String n){ ");
StringBuilder c3 = new StringBuilder("public Object invokeMethod(Object o, String n, Class[] p, Object[] v) throws " + InvocationTargetException.class.getName() + "{ ");
c1.append(name).append(" w; try{ w = ((").append(name).append(")$1); }catch(Throwable e){ throw new IllegalArgumentException(e); }");
c2.append(name).append(" w; try{ w = ((").append(name).append(")$1); }catch(Throwable e){ throw new IllegalArgumentException(e); }");
c3.append(name).append(" w; try{ w = ((").append(name).append(")$1); }catch(Throwable e){ throw new IllegalArgumentException(e); }");
Map> pts = new HashMap>(); //
Map ms = new LinkedHashMap(); //
List mns = new ArrayList(); // method names.
List dmns = new ArrayList(); // declaring method names.
Set getters = new HashSet(ms.keySet().size());
Set setters = new HashSet(ms.keySet().size());
// get all public field.
for( Field f : c.getFields() )
{
String fn = f.getName();
Class ft = f.getType();
if( Modifier.isStatic(f.getModifiers()) || Modifier.isTransient(f.getModifiers()) )
continue;
c1.append(" if( $2.equals(\"").append(fn).append("\") ){ w.").append(fn).append("=").append(arg(ft, "$3")).append("; return; }");
c2.append(" if( $2.equals(\"").append(fn).append("\") ){ return ($w)w.").append(fn).append("; }");
pts.put(fn, ft);
getters.add(fn);
setters.add(fn);
}
Method[] methods = c.getMethods();
// get all public method.
boolean hasMethod = hasMethods(methods);
if( hasMethod ){
c3.append(" try{");
}
for( Method m : methods )
{
if( m.getDeclaringClass() == Object.class ) //ignore Object's method.
continue;
String mn = m.getName();
c3.append(" if( \"").append(mn).append("\".equals( $2 ) ");
int len = m.getParameterTypes().length;
c3.append(" && ").append(" $3.length == ").append(len);
boolean override = false;
for( Method m2 : methods ) {
if (m != m2 && m.getName().equals(m2.getName())) {
override = true;
break;
}
}
if (override) {
if (len > 0) {
for (int l = 0; l < len; l ++) {
c3.append(" && ").append(" $3[").append(l).append("].getName().equals(\"")
.append(m.getParameterTypes()[l].getName()).append("\")");
}
}
}
c3.append(" ) { ");
if( m.getReturnType() == Void.TYPE )
c3.append(" w.").append(mn).append('(').append(args(m.getParameterTypes(), "$4")).append(");").append(" return null;");
else
c3.append(" return ($w)w.").append(mn).append('(').append(args(m.getParameterTypes(), "$4")).append(");");
c3.append(" }");
mns.add(mn);
if( m.getDeclaringClass() == c )
dmns.add(mn);
ms.put(ReflectUtils.getDesc(m), m);
}
if( hasMethod ){
c3.append(" } catch(Throwable e) { " );
c3.append(" throw new java.lang.reflect.InvocationTargetException(e); " );
c3.append(" }");
}
c3.append(" throw new ").append(NoSuchMethodException.class.getName()).append("(\"Not found method \\\"\"+$2+\"\\\" in class ").append(c.getName()).append(".\"); }");
// deal with get/set method.
Matcher matcher;
for( Map.Entry entry : ms.entrySet() )
{
String md = entry.getKey();
Method method = entry.getValue();
if( ( matcher = ReflectUtils.GETTER_METHOD_DESC_PATTERN.matcher(md) ).matches() )
{
String pn = propertyName(matcher.group(1));
c2.append(" if( $2.equals(\"").append(pn).append("\") ){ return ($w)w.").append(method.getName()).append("(); }");
pts.put(pn, method.getReturnType());
getters.add(pn);
}
else if( ( matcher = ReflectUtils.IS_HAS_CAN_METHOD_DESC_PATTERN.matcher(md) ).matches() )
{
String pn = propertyName(matcher.group(1));
c2.append(" if( $2.equals(\"").append(pn).append("\") ){ return ($w)w.").append(method.getName()).append("(); }");
pts.put(pn, method.getReturnType());
setters.add(pn);
}
else if( ( matcher = ReflectUtils.SETTER_METHOD_DESC_PATTERN.matcher(md) ).matches() )
{
Class pt = method.getParameterTypes()[0];
String pn = propertyName(matcher.group(1));
c1.append(" if( $2.equals(\"").append(pn).append("\") ){ w.").append(method.getName()).append("(").append(arg(pt,"$3")).append("); return; }");
pts.put(pn, pt);
setters.add(pn);
}
}
c1.append(" throw new ").append(NoSuchPropertyException.class.getName()).append("(\"Not found property \\\"\"+$2+\"\\\" filed or setter method in class ").append(c.getName()).append(".\"); }");
c2.append(" throw new ").append(NoSuchPropertyException.class.getName()).append("(\"Not found property \\\"\"+$2+\"\\\" filed or getter method in class ").append(c.getName()).append(".\"); }");
// make class
long id = WRAPPER_CLASS_COUNTER.getAndIncrement();
ClassGenerator cc = ClassGenerator.newInstance(cl);
cc.setClassName( ( Modifier.isPublic(c.getModifiers()) ? Wrapper.class.getName() : c.getName() + "$sw" ) + id );
cc.setSuperClass(Wrapper.class);
cc.addDefaultConstructor();
cc.addField("public static String[] pns;"); // property name array.
cc.addField("public static " + Map.class.getName() + " pts;"); // property type map.
cc.addField("public static String[] mns;"); // all method name array.
cc.addField("public static String[] dmns;"); // declared method name array.
for(int i=0,len=ms.size();i> modifiedPts = new HashMap>();
for (Map.Entry> entry : pts.entrySet()) {
String propertyName = entry.getKey();
if (getters.contains(propertyName) && setters.contains(propertyName)) {
modifiedPts.put(propertyName, entry.getValue());
}
}
try
{
Class wc = cc.toClass();
// setup static field.
wc.getField("pts").set(null, modifiedPts);
wc.getField("pns").set(null, modifiedPts.keySet().toArray(new String[0]));
wc.getField("mns").set(null, mns.toArray(new String[0]));
wc.getField("dmns").set(null, dmns.toArray(new String[0]));
int ix = 0;
for( Method m : ms.values() )
wc.getField("mts" + ix++).set(null, m.getParameterTypes());
return (Wrapper)wc.newInstance();
}
catch(RuntimeException e)
{
throw e;
}
catch(Throwable e)
{
throw new RuntimeException(e.getMessage(), e);
}
finally
{
cc.release();
ms.clear();
mns.clear();
dmns.clear();
}
}
4.3 本地服务导出
入口
exportLocal(url);
exportLocal Protocol 默认是 DubboProtocol
private void exportLocal(URL url) {
if (!Constants.LOCAL_PROTOCOL.equalsIgnoreCase(url.getProtocol())) {
URL local = URL.valueOf(url.toFullString())
.setProtocol(Constants.LOCAL_PROTOCOL)
.setHost(NetUtils.LOCALHOST)
.setPort(0);
Exporter exporter = protocol.export(
proxyFactory.getInvoker(ref, (Class) interfaceClass, local));
exporters.add(exporter);
logger.info("Export dubbo service " + interfaceClass.getName() +" to local registry");
}
}
上面说了wrapper封装了实际实现
这里又用了invoker去封装wrapper
public Invoker getInvoker(T proxy, Class type, URL url) {
// TODO Wrapper类不能正确处理带$的类名
final Wrapper wrapper = Wrapper.getWrapper(proxy.getClass().getName().indexOf('$') < 0 ? proxy.getClass() : type);
return new AbstractProxyInvoker(proxy, type, url) {
@Override
protected Object doInvoke(T proxy, String methodName,
Class[] parameterTypes,
Object[] arguments) throws Throwable {
return wrapper.invokeMethod(proxy, methodName, parameterTypes, arguments);
}
};
}
protocal的export方法,导出一个invoker
public Exporter export(Invoker invoker)
DubboProtocol的实现
public Exporter export(Invoker invoker) throws RpcException {
URL url = invoker.getUrl();
// export service.
String key = serviceKey(url);
DubboExporter exporter = new DubboExporter(invoker, key, exporterMap);
logger.debug("exported key:" + key + " -> " + invoker + "");
exporterMap.put(key, exporter);
//export an stub service for dispaching event
Boolean isStubSupportEvent = url.getParameter(Constants.STUB_EVENT_KEY, Constants.DEFAULT_STUB_EVENT);
Boolean isCallbackservice = url.getParameter(Constants.IS_CALLBACK_SERVICE, false);
if (isStubSupportEvent && !isCallbackservice) {
String stubServiceMethods = url.getParameter(Constants.STUB_EVENT_METHODS_KEY);
if (stubServiceMethods == null || stubServiceMethods.length() == 0) {
if (logger.isWarnEnabled()) {
logger.warn(new IllegalStateException("consumer [" + url.getParameter(Constants.INTERFACE_KEY) +
"], has set stubproxy support event ,but no stub methods founded."));
}
}
// stubServiceMethodsMap.put(url.getServiceKey(), stubServiceMethods);
}
openServer(url);
return exporter;
}
4.4 远程服务导出
操作流程比较长 就不列出调用链了
- 通过ServerBootstrap创建Server
- 把nettyHandler绑定在netty channel上,这样当netty channel有事件进来就会调用nettyHandler , nettyHandler绑定组装好的dubbo ChannelHandler链
- ChannelHandler链里的HeaderExchangeHandler会把消息转给.DefaultFuture#doReceived去处理
- doReceived源码: 给返回赋值 并解开阻塞条件变量done上的线程
private void doReceived(Response res) {
lock.lock();
try {
response = res;
if (done != null) {
done.signal();
}
} finally {
lock.unlock();
}
if (callback != null) {
invokeCallback(callback);
}
}
开启nettyServer 源码
protected void doOpen() throws Throwable {
ExecutorService boss = Executors.newCachedThreadPool(new NamedThreadFactory("NettyServerBoss", true));
ExecutorService worker = Executors.newCachedThreadPool(new NamedThreadFactory("NettyServerWorker", true));
ChannelFactory channelFactory = new NioServerSocketChannelFactory(boss, worker, getUrl().getPositiveParameter(Constants.IO_THREADS_KEY, Constants.DEFAULT_IO_THREADS));
bootstrap = new ServerBootstrap(channelFactory);
final NettyHandler nettyHandler = new NettyHandler(getUrl(), this);
channels = nettyHandler.getChannels();
// https://issues.jboss.org/browse/NETTY-365
// https://issues.jboss.org/browse/NETTY-379
// final Timer timer = new HashedWheelTimer(new NamedThreadFactory("NettyIdleTimer", true));
bootstrap.setPipelineFactory(new ChannelPipelineFactory() {
public ChannelPipeline getPipeline() {
NettyCodecAdapter adapter = new NettyCodecAdapter(getCodec() ,getUrl(), NettyServer.this);
ChannelPipeline pipeline = Channels.pipeline();
/*int idleTimeout = getIdleTimeout();
if (idleTimeout > 10000) {
pipeline.addLast("timer", new IdleStateHandler(timer, idleTimeout / 1000, 0, 0));
}*/
pipeline.addLast("decoder", adapter.getDecoder());
pipeline.addLast("encoder", adapter.getEncoder());
pipeline.addLast("handler", nettyHandler);
return pipeline;
}
});
// bind
channel = bootstrap.bind(getBindAddress());
}
5.服务注册
默认使用ZK注册 关键就这一句 使用apache提供zk客户端org.apache.curator.framework.CuratorFramework创建临时节点
public void createEphemeral(String path) {
try {
// 通过 Curator 框架创建节点
client.create().withMode(CreateMode.EPHEMERAL).forPath(path);
} catch (NodeExistsException e) {
} catch (Exception e) {
throw new IllegalStateException(e.getMessage(), e);
}
}
临时节点数据示例
``
consumer://127.0.0.1/com.zc.IhelloService?active=false&category=consumers&check=false&cluster=failfast&connected=true&default.qloglevel=4&dubbo=3.2.24&interface=com.zc.IhelloService&methods=sayHello
dubbo://127.0.0.1/com.zc.IhelloService?active=false&category=consumers&check=false&cluster=failfast&connected=true&default.qloglevel=4&dubbo=3.2.24&interface=com.zc.IhelloService&methods=sayHello