/*
* 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 java.util.Collection;
import java.util.List;
import java.util.Map;
import com.alibaba.dubbo.common.extension.Activate;
import com.alibaba.dubbo.common.json.JSON;
import com.alibaba.dubbo.common.utils.PojoUtils;
import com.alibaba.dubbo.common.utils.ReflectUtils;
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.RpcContext;
import com.alibaba.dubbo.rpc.RpcInvocation;
import com.alibaba.dubbo.rpc.protocol.dubbo.DubboProtocol;
/**
* InvokeTelnetHandler
*
* @author william.liangf
*/
@Activate
@Help(parameter = "[service.]method(args)", summary = "Invoke the service method.", detail = "Invoke the service method.")
public class InvokeTelnetHandler implements TelnetHandler {
@SuppressWarnings("unchecked")
public String telnet(Channel channel, String message) {
if (message == null || message.length() == 0) {
return "Please input method name, eg: \r\ninvoke xxxMethod(1234, \"abcd\", {\"prop\" : \"value\"})\r\ninvoke XxxService.xxxMethod(1234, \"abcd\", {\"prop\" : \"value\"})\r\ninvoke com.xxx.XxxService.xxxMethod(1234, \"abcd\", {\"prop\" : \"value\"})";
}
StringBuilder buf = new StringBuilder();
String service = (String) channel.getAttribute(ChangeTelnetHandler.SERVICE_KEY);
if (service != null && service.length() > 0) {
buf.append("Use default service " + service + ".\r\n");
}
int i = message.indexOf("(");
if (i < 0 || ! message.endsWith(")")) {
return "Invalid parameters, format: service.method(args)";
}
String method = message.substring(0, i).trim();
String args = message.substring(i + 1, message.length() - 1).trim();
i = method.lastIndexOf(".");
if (i >= 0) {
service = method.substring(0, i).trim();
method = method.substring(i + 1).trim();
}
List<Object> list;
try {
list = (List<Object>) JSON.parse("[" + args + "]", List.class);
} catch (Throwable t) {
return "Invalid json argument, cause: " + t.getMessage();
}
Invoker<?> invoker = null;
Method invokeMethod = null;
for (Exporter<?> exporter : DubboProtocol.getDubboProtocol().getExporters()) {
if (service == null || service.length() == 0) {
invokeMethod = findMethod(exporter, method, list);
if (invokeMethod != null) {
invoker = exporter.getInvoker();
break;
}
} else {
if (service.equals(exporter.getInvoker().getInterface().getSimpleName())
|| service.equals(exporter.getInvoker().getInterface().getName())
|| service.equals(exporter.getInvoker().getUrl().getPath())) {
invokeMethod = findMethod(exporter, method, list);
invoker = exporter.getInvoker();
break;
}
}
}
if (invoker != null) {
if (invokeMethod != null) {
try {
Object[] array = PojoUtils.realize(list.toArray(), invokeMethod.getParameterTypes());
RpcContext.getContext().setLocalAddress(channel.getLocalAddress()).setRemoteAddress(channel.getRemoteAddress());
long start = System.currentTimeMillis();
Object result = invoker.invoke(new RpcInvocation(invokeMethod, array)).recreate();
long end = System.currentTimeMillis();
buf.append(JSON.json(result));
buf.append("\r\nelapsed: ");
buf.append(end - start);
buf.append(" ms.");
} catch (Throwable t) {
return "Failed to invoke method " + invokeMethod.getName() + ", cause: " + StringUtils.toString(t);
}
} else {
buf.append("No such method " + method + " in service " + service);
}
} else {
buf.append("No such service " + service);
}
return buf.toString();
}
private static Method findMethod(Exporter<?> exporter, String method, List<Object> args) {
Invoker<?> invoker = exporter.getInvoker();
Method[] methods = invoker.getInterface().getMethods();
Method invokeMethod = null;
for (Method m : methods) {
if (m.getName().equals(method) && m.getParameterTypes().length == args.size()) {
if (invokeMethod != null) { // 重载
if (isMatch(invokeMethod.getParameterTypes(), args)) {
invokeMethod = m;
break;
}
} else {
invokeMethod = m;
}
invoker = exporter.getInvoker();
}
}
return invokeMethod;
}
private static boolean isMatch(Class<?>[] types, List<Object> args) {
if (types.length != args.size()) {
return false;
}
for (int i = 0; i < types.length; i ++) {
Class<?> type = types[i];
Object arg = args.get(i);
if (ReflectUtils.isPrimitive(arg.getClass())) {
if (! ReflectUtils.isPrimitive(type)) {
return false;
}
} else if (arg instanceof Map) {
String name = (String) ((Map<?, ?>)arg).get("class");
Class<?> cls = arg.getClass();
if (name != null && name.length() > 0) {
cls = ReflectUtils.forName(name);
}
if (! type.isAssignableFrom(cls)) {
return false;
}
} else if (arg instanceof Collection) {
if (! type.isArray() && ! type.isAssignableFrom(arg.getClass())) {
return false;
}
} else {
if (! type.isAssignableFrom(arg.getClass())) {
return false;
}
}
}
return true;
}
}