/* | |
* Copyright 1999-2011 Alibaba Group. | |
* | |
* Licensed under the Apache License, Version 2.0 (the "License"); | |
* you may not use this file except in compliance with the License. | |
* You may obtain a copy of the License at | |
* | |
* http://www.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, software | |
* distributed under the License is distributed on an "AS IS" BASIS, | |
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
* See the License for the specific language governing permissions and | |
* limitations under the License. | |
*/ | |
package com.alibaba.dubbo.rpc.protocol.dubbo.telnet; | |
import java.lang.reflect.Method; | |
import com.alibaba.dubbo.common.Extension; | |
import com.alibaba.dubbo.common.utils.StringUtils; | |
import com.alibaba.dubbo.remoting.Channel; | |
import com.alibaba.dubbo.remoting.telnet.TelnetHandler; | |
import com.alibaba.dubbo.remoting.telnet.support.Help; | |
import com.alibaba.dubbo.rpc.Exporter; | |
import com.alibaba.dubbo.rpc.Invoker; | |
import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol; | |
import com.alibaba.dubbo.rpc.protocol.dubbo.filter.TraceFilter; | |
/** | |
* TraceTelnetHandler | |
* | |
* @author william.liangf | |
*/ | |
@Help(parameter = "[service] [method] [times]", summary = "Trace the service.", detail = "Trace the service.") | |
@Extension("trace") | |
public class TraceTelnetHandler implements TelnetHandler { | |
public String telnet(Channel channel, String message) { | |
String service = (String) channel.getAttribute(ChangeTelnetHandler.SERVICE_KEY); | |
if ((service == null || service.length() == 0) | |
&& (message == null || message.length() == 0)) { | |
return "Please input service name, eg: \r\ntrace XxxService\r\ntrace XxxService xxxMethod\r\ntrace XxxService xxxMethod 10\r\nor \"cd XxxService\" firstly."; | |
} | |
StringBuilder buf = new StringBuilder(); | |
if (service != null && service.length() > 0) { | |
buf.append("Use default service " + service + ".\r\n"); | |
} | |
String[] parts = message.split("\\s+"); | |
String method; | |
String times; | |
if (service == null || service.length() == 0) { | |
service = parts.length > 0 ? parts[0] : null; | |
method = parts.length > 1 ? parts[1] : null; | |
} else { | |
method = parts.length > 0 ? parts[0] : null; | |
} | |
if (StringUtils.isInteger(method)) { | |
times = method; | |
method = null; | |
} else { | |
times = parts.length > 2 ? parts[2] : "1"; | |
} | |
if (! StringUtils.isInteger(times)) { | |
return "Illegal times " + times + ", must be integer."; | |
} | |
Invoker<?> invoker = null; | |
for (Exporter<?> exporter : DubboProtocol.getDubboProtocol().getExporters()) { | |
if (service.equals(exporter.getInvoker().getInterface().getSimpleName()) | |
|| service.equals(exporter.getInvoker().getInterface().getName()) | |
|| service.equals(exporter.getInvoker().getUrl().getPath())) { | |
invoker = exporter.getInvoker(); | |
break; | |
} | |
} | |
if (invoker != null) { | |
if (method != null && method.length() > 0) { | |
boolean found = false; | |
for (Method m : invoker.getInterface().getMethods()) { | |
if (m.getName().equals(method)) { | |
found = true; | |
break; | |
} | |
} | |
if (! found) { | |
return "No such method " + method + " in class " + invoker.getInterface().getName(); | |
} | |
} | |
TraceFilter.addTracer(invoker.getInterface(), method, channel, Integer.parseInt(times)); | |
} else { | |
buf.append("No such service " + service); | |
} | |
return buf.toString(); | |
} | |
} |