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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.dubbo.qos.legacy;
import org.apache.dubbo.common.extension.Activate;
import org.apache.dubbo.common.utils.StringUtils;
import org.apache.dubbo.remoting.Channel;
import org.apache.dubbo.remoting.telnet.TelnetHandler;
import org.apache.dubbo.remoting.telnet.support.Help;
import org.apache.dubbo.rpc.Exporter;
import org.apache.dubbo.rpc.Invoker;
import org.apache.dubbo.rpc.protocol.dubbo.DubboProtocol;
import org.apache.dubbo.rpc.protocol.dubbo.filter.TraceFilter;
import java.lang.reflect.Method;
/**
* TraceTelnetHandler
*/
@Activate
@Help(parameter = "[service] [method] [times]", summary = "Trace the service.", detail = "Trace the service.")
public class TraceTelnetHandler implements TelnetHandler {
@Override
public String telnet(Channel channel, String message) {
String service = (String) channel.getAttribute(ChangeTelnetHandler.SERVICE_KEY);
if ((StringUtils.isEmpty(service))
&& (StringUtils.isEmpty(message))) {
return "Please input service name, eg: \r\ntrace XxxService\r\ntrace XxxService xxxMethod\r\ntrace XxxService xxxMethod 10\r\nor \"cd XxxService\" firstly.";
}
String[] parts = message.split("\\s+");
String method;
String times;
// message like : XxxService , XxxService 10 , XxxService xxxMethod , XxxService xxxMethod 10
if (StringUtils.isEmpty(service)) {
service = parts.length > 0 ? parts[0] : null;
method = parts.length > 1 ? parts[1] : null;
times = parts.length > 2 ? parts[2] : "1";
} else { //message like : xxxMethod, xxxMethod 10
method = parts.length > 0 ? parts[0] : null;
times = parts.length > 1 ? parts[1] : "1";
}
if (StringUtils.isNumber(method)) {
times = method;
method = null;
}
if (!StringUtils.isNumber(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 (StringUtils.isNotEmpty(method)) {
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 {
return "No such service " + service;
}
return null;
}
}