private ExchangeServer getServer(URL url) {
// 指定自己的exchanger
url = url.addParameterIfAbsent(Constants.EXCHANGER_KEY, HeaderExchanger2.NAME);
// server type setting
url = url.addParameterIfAbsent(Constants.SERVER_KEY, NettyTransporter2.NAME);
// check server type
String str = url.getParameter(Constants.SERVER_KEY, NettyTransporter2.NAME);
if (str != null
&& str.length() > 0
&& !ExtensionLoader.getExtensionLoader(Transporter.class).hasExtension(str)) {
throw new RpcException("Unsupported server type: " + str + ", url: " + url);
}
ExchangeServer server;
try {
server = Exchangers.bind(url, requestHandler);
} catch (RemotingException e) {
throw new RpcException("Fail to start server(url: " + url + ") " + e.getMessage(), e);
}
str = url.getParameter(Constants.CLIENT_KEY);
if (str != null && str.length() > 0) {
Set<String> supportedTypes =
ExtensionLoader.getExtensionLoader(Transporter.class).getSupportedExtensions();
if (!supportedTypes.contains(str)) {
throw new RpcException("Unsupported client type: " + str);
}
}
return server;
}
/** 创建新连接. */
private ExchangeClient initClient(URL url) {
// 指定自己的exchanger
url = url.addParameterIfAbsent(Constants.EXCHANGER_KEY, HeaderExchanger2.NAME);
// client type setting.
url =
url.addParameterIfAbsent(
Constants.CLIENT_KEY, url.getParameter(Constants.SERVER_KEY, NettyTransporter2.NAME));
// check client type
String str =
url.getParameter(
Constants.CLIENT_KEY, url.getParameter(Constants.SERVER_KEY, NettyTransporter2.NAME));
// BIO存在严重性能问题，暂时不允许使用
if (str != null
&& str.length() > 0
&& !ExtensionLoader.getExtensionLoader(Transporter.class).hasExtension(str)) {
throw new RpcException(
"Unsupported client type: "
+ str
+ ","
+ " supported client type is "
+ StringUtils.join(
ExtensionLoader.getExtensionLoader(Transporter.class).getSupportedExtensions(),
" "));
}
ExchangeClient client;
try {
// 设置连接应该是lazy的
if (url.getParameter(Constants.LAZY_CONNECT_KEY, false)) {
client = new LazyConnectExchangeClient(url, requestHandler);
} else {
client = Exchangers.connect(url, requestHandler);
}
} catch (RemotingException e) {
throw new RpcException(
"Fail to create remoting client for service(" + url + "): " + e.getMessage(), e);
}
return client;
}