test/java/rmi/reliability/benchmark/bench/rmi/SmallObjTreeCalls.java

/*
 * Copyright (c) 2000, 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 *
 */

package bench.rmi;

import bench.Benchmark;
import java.io.Serializable;
import java.rmi.Remote;
import java.rmi.RemoteException;
import java.rmi.server.UnicastRemoteObject;

/**
 * Benchmark for testing speed of calls with small object tree parameters and
 * return values.
 */
public class SmallObjTreeCalls implements Benchmark {

    static class Node implements Serializable {
        Object parent, left, right;

        Node(Object parent, int depth) {
            this.parent = parent;
            if (depth > 0) {
                left = new Node(this, depth - 1);
                right = new Node(this, depth - 1);
            }
        }
    }

    interface Server extends Remote {
        public Node call(Node val) throws RemoteException;
    }

    static class ServerImpl extends UnicastRemoteObject implements Server {
        public ServerImpl() throws RemoteException {
        }

        public Node call(Node val) throws RemoteException {
            return val;
        }
    }

    static class ServerFactory implements BenchServer.RemoteObjectFactory {
        public Remote create() throws RemoteException {
            return new ServerImpl();
        }
    }

    /**
     * Issue calls using trees of small objects as parameters/return values.
     * Arguments: <tree depth> <# calls>
     */
    public long run(String[] args) throws Exception {
        int depth = Integer.parseInt(args[0]);
        int reps = Integer.parseInt(args[1]);
        BenchServer bsrv = Main.getBenchServer();
        Server stub = (Server) bsrv.create(new ServerFactory());
        Node node = new Node(null, depth);

        long start = System.currentTimeMillis();
        for (int i = 0; i < reps; i++)
            stub.call(node);
        long time = System.currentTimeMillis() - start;

        bsrv.unexport(stub, true);
        return time;
    }
}