Java example source code file (MXBeanRefTest.java)

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Java - Java tags/keywords

duplicate, exception, failed, got, management, mbeanserver, mbeanserverdelegate, mbeanserverinvocationhandler, moduleimpl, modulemxbean, objectname, productimpl, productmxbean, proxy, reflection, test

The MXBeanRefTest.java Java example source code

/*
 * Copyright (c) 2005, 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.
 */

/*
 * @test
 * @bug 6296433 6283873
 * @summary Test that inter-MXBean references work as expected.
 * @author Eamonn McManus
 * @run clean MXBeanRefTest
 * @run build MXBeanRefTest
 * @run main MXBeanRefTest
 */

import java.lang.reflect.Proxy;
import java.lang.reflect.UndeclaredThrowableException;
import javax.management.Attribute;
import javax.management.InstanceAlreadyExistsException;
import javax.management.JMX;
import javax.management.MBeanServer;
import javax.management.MBeanServerDelegate;
import javax.management.MBeanServerFactory;
import javax.management.MBeanServerInvocationHandler;
import javax.management.ObjectName;
import javax.management.openmbean.OpenDataException;

public class MXBeanRefTest {
    public static void main(String[] args) throws Exception {
        MBeanServer mbs = MBeanServerFactory.createMBeanServer();
        ObjectName productName = new ObjectName("d:type=Product,n=1");
        ObjectName product2Name = new ObjectName("d:type=Product,n=2");
        ObjectName moduleName = new ObjectName("d:type=Module");
        mbs.registerMBean(product, productName);
        mbs.registerMBean(product2, product2Name);
        mbs.registerMBean(module, moduleName);
        ModuleMXBean moduleProxy =
                JMX.newMXBeanProxy(mbs, moduleName, ModuleMXBean.class);

        ObjectName on;
        on = (ObjectName) mbs.getAttribute(moduleName, "Product");
        check("ObjectName attribute value", on.equals(productName));

        ProductMXBean productProxy = moduleProxy.getProduct();
        MBeanServerInvocationHandler mbsih = (MBeanServerInvocationHandler)
                Proxy.getInvocationHandler(productProxy);
        check("ObjectName in proxy", mbsih.getObjectName().equals(productName));

        mbs.setAttribute(moduleName, new Attribute("Product", product2Name));
        ProductMXBean product2Proxy = module.getProduct();
        mbsih = (MBeanServerInvocationHandler)
                Proxy.getInvocationHandler(product2Proxy);
        check("Proxy after setAttribute",
                mbsih.getObjectName().equals(product2Name));

        moduleProxy.setProduct(productProxy);
        ProductMXBean productProxyAgain = module.getProduct();
        mbsih = (MBeanServerInvocationHandler)
                Proxy.getInvocationHandler(productProxyAgain);
        check("Proxy after proxied set",
                mbsih.getObjectName().equals(productName));

        MBeanServer mbs2 = MBeanServerFactory.createMBeanServer();
        ProductMXBean productProxy2 =
                JMX.newMXBeanProxy(mbs2, productName, ProductMXBean.class);
        try {
            moduleProxy.setProduct(productProxy2);
            check("Proxy for wrong MBeanServer worked but shouldn't", false);
        } catch (Exception e) {
            if (e instanceof UndeclaredThrowableException &&
                    e.getCause() instanceof OpenDataException)
                check("Proxy for wrong MBeanServer correctly rejected", true);
            else {
                e.printStackTrace(System.out);
                check("Proxy for wrong MBeanServer got wrong exception", false);
            }
        }

        // Test 6283873
        ObjectName dup = new ObjectName("a:b=c");
        mbs.registerMBean(new MBeanServerDelegate(), dup);
        try {
            mbs.registerMBean(new ProductImpl(), dup);
            check("Duplicate register succeeded but should fail", false);
        } catch (InstanceAlreadyExistsException e) {
            check("Got correct exception from duplicate name", true);
        } catch (Exception e) {
            e.printStackTrace(System.out);
            check("Got wrong exception from duplicate name", false);
        }

        if (failure != null)
            throw new Exception("TEST FAILED: " + failure);
        System.out.println("TEST PASSED");
    }

    private static void check(String what, boolean ok) {
        if (ok)
            System.out.println("OK: " + what);
        else {
            System.out.println("FAILED: " + what);
            failure = what;
        }
    }

    public static interface ProductMXBean {
        ModuleMXBean[] getModules();
    }

    public static interface ModuleMXBean {
        ProductMXBean getProduct();
        void setProduct(ProductMXBean p);
    }

    public static class ProductImpl implements ProductMXBean {
        public ModuleMXBean[] getModules() {
            return modules;
        }
    }

    public static class ModuleImpl implements ModuleMXBean {
        public ModuleImpl(ProductMXBean p) {
            setProduct(p);
        }

        public ProductMXBean getProduct() {
            return prod;
        }

        public void setProduct(ProductMXBean p) {
            this.prod = p;
        }

        private ProductMXBean prod;
    }

    private static final ProductMXBean product = new ProductImpl();
    private static final ProductMXBean product2 = new ProductImpl();
    private static final ModuleMXBean module = new ModuleImpl(product);
    private static final ModuleMXBean[] modules = new ModuleMXBean[] {module};
    private static String failure;
}