scouter.agent.netio.request.ReqestHandlingProxy Maven / Gradle / Ivy
/*
* Copyright 2015 the original author or authors.
* @https://github.com/scouter-project/scouter
*
* 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 scouter.agent.netio.request;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import scouter.agent.Logger;
import scouter.agent.netio.request.anotation.RequestHandler;
import scouter.io.DataInputX;
import scouter.io.DataOutputX;
import scouter.lang.pack.Pack;
import scouter.util.scan.Scanner;
public class ReqestHandlingProxy {
protected static HashMap handlers = new HashMap();
protected static class Invocation {
Object object;
Method method;
Class[] pTypes;
public Invocation(Object object, Method method, Class[] paramter) {
this.object = object;
this.method = method;
this.pTypes = paramter;
}
public Pack exec(Pack p, DataInputX in, DataOutputX out) {
try {
switch (pTypes.length) {
case 3:
return (Pack) method.invoke(object, new Object[] { p, in, out });
default:
return (Pack) method.invoke(object, new Object[] { p });
}
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
@Override
public String toString() {
return object.getClass().getName() + "." + method.getName();
}
}
public static void load(Class cls) {
String pkg = Scanner.cutOutLast(cls.getName(), ".");
Set classes = new Scanner(pkg).process();
Set custom = new Scanner(System.getProperty("scouter.handler")).process();
classes.addAll(custom);
Iterator itr = classes.iterator();
while (itr.hasNext()) {
try {
Class c = Class.forName(itr.next());
if (Modifier.isPublic(c.getModifiers()) == false)
continue;
try {
Method[] m = c.getDeclaredMethods();
for (int i = 0; i < m.length; i++) {
RequestHandler mapAn = (RequestHandler) m[i].getAnnotation(RequestHandler.class);
if (mapAn == null)
continue;
String key = mapAn.value();
Invocation news = new Invocation(c.newInstance(), m[i], m[i].getParameterTypes());
Invocation olds = handlers.get(key);
if (olds != null) {
Logger.println("A129", "Warning duplicated Handler key=" + key + " " + olds + " <-> " + news);
}
handlers.put(key, news);
}
} catch (Exception x) {
x.printStackTrace();
}
} catch (Throwable t) {
t.printStackTrace();
}
}
}
public static Pack process(String cmd, Pack req, DataInputX in, DataOutputX out) {
if ("KEEP_ALIVE".equals(cmd))
return null;
Invocation handler = handlers.get(cmd);
if (handler != null) {
return handler.exec(req, in, out);
} else {
Logger.println("A130", "TCP unknown cmd=" + cmd);
}
return null;
}
public static void main(String[] args) {
load(ReqestHandlingProxy.class);
}
}