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Remote Reflection API is utility API which make it easier for calling remote method on remote JVM without the need for any special configurations, and without any contract between the applications.

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/*
 * Copyright 2002-2016 Jalal Kiswani.
 *
 * 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.jk.reflection.server;

import java.io.Serializable;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.Arrays;
import java.util.logging.Logger;

import com.jk.reflection.common.MethodCallInfo;
import com.jk.reflection.common.RemoteReflectionException;

/**
 * Local method caller in the server JVM , it will call the method using
 * standard Java reflection API.
 *
 * @author Jalal Kiswani
 * @Jan 2009
 */
public class MethodsCaller {

	/** The logger. */
	static Logger logger = Logger.getLogger(MethodsCaller.class.getName());

	/**
	 * Get the required information from {@link MethodCallInfo} object , and
	 * then call it using java standard reflection API.
	 *
	 * @param info
	 *            the info
	 */
	@SuppressWarnings({ "rawtypes", "unchecked" })
	public void callMethod(final MethodCallInfo info) {
		try {
			MethodsCaller.logger.info("loading class : ".concat(info.getClassName()));
			final Class clas = getClass().getClassLoader().loadClass(info.getClassName());
			MethodsCaller.logger.info("calling default constructor");
			final Object object = clas.newInstance();
			MethodsCaller.logger.info("calling method : " + info.getMethodName()
					+ " , with params: ".concat(Arrays.toString(info.getParamters())));
			final Method method = clas.getMethod(info.getMethodName(), info.getParamtersTypes());
			final Object result = method.invoke(object, info.getParamters());
			if (!(result instanceof Serializable)) {
				throw new IllegalStateException(
						"object " + result + " from type " + result.getClass().getName() + " is not serialzable");
			}
			info.setResult(result);
		} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | NoSuchMethodException
				| SecurityException | IllegalArgumentException | InvocationTargetException e) {
			MethodsCaller.logger.severe("calling to method failed : ".concat(info.toString()));
			throw new RemoteReflectionException(e);
		}
	}

}