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Spring Framework example source code file (MBeanClientInterceptorTests.java)

This example Spring Framework source code file (MBeanClientInterceptorTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Spring Framework tags/keywords

bean, class, exception, exception, harrop, ijmxtestbean, ijmxtestbean, management, mbeanproxyfactorybean, method, net, network, reflection, rob, should, string, string, the, the, util

The Spring Framework MBeanClientInterceptorTests.java source code

/*
 * Copyright 2002-2007 the original author or authors.
 *
 * 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 org.springframework.jmx.access;

import java.beans.PropertyDescriptor;
import java.io.IOException;
import java.lang.reflect.Method;
import java.net.BindException;
import java.util.HashMap;
import java.util.Map;

import javax.management.Descriptor;
import javax.management.MBeanServerConnection;
import javax.management.remote.JMXConnectorServer;
import javax.management.remote.JMXConnectorServerFactory;
import javax.management.remote.JMXServiceURL;

import org.springframework.jmx.AbstractMBeanServerTests;
import org.springframework.jmx.IJmxTestBean;
import org.springframework.jmx.JmxTestBean;
import org.springframework.jmx.export.MBeanExporter;
import org.springframework.jmx.export.assembler.AbstractReflectiveMBeanInfoAssembler;

/**
 * @author Rob Harrop
 * @author Juergen Hoeller
 */
public class MBeanClientInterceptorTests extends AbstractMBeanServerTests {

	protected static final String OBJECT_NAME = "spring:test=proxy";

	protected JmxTestBean target;
	
	protected boolean runTests = true;

	public void onSetUp() throws Exception {
		target = new JmxTestBean();
		target.setAge(100);
		target.setName("Rob Harrop");

		MBeanExporter adapter = new MBeanExporter();
		Map beans = new HashMap();
		beans.put(OBJECT_NAME, target);
		adapter.setServer(getServer());
		adapter.setBeans(beans);
		adapter.setAssembler(new ProxyTestAssembler());
		adapter.afterPropertiesSet();
	}

	protected MBeanServerConnection getServerConnection() throws Exception {
		return getServer();
	}

	protected IJmxTestBean getProxy() throws Exception {
		MBeanProxyFactoryBean factory = new MBeanProxyFactoryBean();
		factory.setServer(getServerConnection());
		factory.setProxyInterface(IJmxTestBean.class);
		factory.setObjectName(OBJECT_NAME);
		factory.afterPropertiesSet();
		return (IJmxTestBean) factory.getObject();
	}

	public void testProxyClassIsDifferent() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		assertTrue("The proxy class should be different than the base class",
				(proxy.getClass() != IJmxTestBean.class));
	}

	public void testDifferentProxiesSameClass() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy1 = getProxy();
		IJmxTestBean proxy2 = getProxy();

		assertNotSame("The proxies should NOT be the same", proxy1, proxy2);
		assertSame("The proxy classes should be the same", proxy1.getClass(), proxy2.getClass());
	}

	public void testGetAttributeValue() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy1 = getProxy();
		int age = proxy1.getAge();
		assertEquals("The age should be 100", 100, age);
	}

	public void testSetAttributeValue() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		proxy.setName("Rob Harrop");
		assertEquals("The name of the bean should have been updated", "Rob Harrop", target.getName());
	}

	public void testSetAttributeValueWithRuntimeException() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		try {
			proxy.setName("Juergen");
			fail("Should have thrown IllegalArgumentException");
		}
		catch (IllegalArgumentException ex) {
			// expected
		}
	}

	public void testSetAttributeValueWithCheckedException() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		try {
			proxy.setName("Juergen Class");
			fail("Should have thrown ClassNotFoundException");
		}
		catch (ClassNotFoundException ex) {
			// expected
		}
	}

	public void testSetAttributeValueWithIOException() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		try {
			proxy.setName("Juergen IO");
			fail("Should have thrown IOException");
		}
		catch (IOException ex) {
			// expected
		}
	}

	public void testSetReadOnlyAttribute() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		try {
			proxy.setAge(900);
			fail("Should not be able to write to a read only attribute");
		}
		catch (InvalidInvocationException ex) {
			// success
		}
	}

	public void testInvokeNoArgs() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		long result = proxy.myOperation();
		assertEquals("The operation should return 1", 1, result);
	}

	public void testInvokeArgs() throws Exception {
		if (!runTests) return;
		IJmxTestBean proxy = getProxy();
		int result = proxy.add(1, 2);
		assertEquals("The operation should return 3", 3, result);
	}

	public void testInvokeUnexposedMethodWithException() throws Exception {
		if (!runTests) return;
		IJmxTestBean bean = getProxy();
		try {
			bean.dontExposeMe();
			fail("Method dontExposeMe should throw an exception");
		}
		catch (InvalidInvocationException desired) {
			// success
		}
	}

	public void testLazyConnectionToRemote() throws Exception {
		if (!runTests) return;

		JMXServiceURL url = new JMXServiceURL("service:jmx:jmxmp://localhost:9876");
		JMXConnectorServer connector = JMXConnectorServerFactory.newJMXConnectorServer(url, null, getServer());

		MBeanProxyFactoryBean factory = new MBeanProxyFactoryBean();
		factory.setServiceUrl(url.toString());
		factory.setProxyInterface(IJmxTestBean.class);
		factory.setObjectName(OBJECT_NAME);
		factory.setConnectOnStartup(false);

		// should skip connection to the server
		factory.afterPropertiesSet();

		// now start the connector
		try {
			connector.start();
		}
		catch (BindException ex) {
			// couldn't bind to local port 9876 - let's skip the remainder of this test
			System.out.println(
					"Skipping JMX LazyConnectionToRemote test because binding to local port 9876 failed: " +
					ex.getMessage());
			return;
		}

		// should now be able to access data via the lazy proxy
		try {
			IJmxTestBean bean = (IJmxTestBean) factory.getObject();
			assertEquals("Rob Harrop", bean.getName());
			assertEquals(100, bean.getAge());
		}
		finally {
			connector.stop();
		}
	}

	// Commented out because of a side effect with the the started platform MBeanServer.
	/*
	public void testMXBeanAttributeAccess() throws Exception {
		if (JdkVersion.getMajorJavaVersion() < JdkVersion.JAVA_15) {
			return;
		}

		MBeanClientInterceptor interceptor = new MBeanClientInterceptor();
		interceptor.setServer(ManagementFactory.getPlatformMBeanServer());
		interceptor.setObjectName("java.lang:type=Memory");
		interceptor.setManagementInterface(MemoryMXBean.class);
		MemoryMXBean proxy = (MemoryMXBean) ProxyFactory.getProxy(MemoryMXBean.class, interceptor);
		assertTrue(proxy.getHeapMemoryUsage().getMax() > 0);
	}

	public void testMXBeanOperationAccess() throws Exception {
		if (JdkVersion.getMajorJavaVersion() < JdkVersion.JAVA_15) {
			return;
		}

		MBeanClientInterceptor interceptor = new MBeanClientInterceptor();
		interceptor.setServer(ManagementFactory.getPlatformMBeanServer());
		interceptor.setObjectName("java.lang:type=Threading");
		ThreadMXBean proxy = (ThreadMXBean) ProxyFactory.getProxy(ThreadMXBean.class, interceptor);
		assertTrue(proxy.getThreadInfo(Thread.currentThread().getId()).getStackTrace() != null);
	}
	*/


	private static class ProxyTestAssembler extends AbstractReflectiveMBeanInfoAssembler {

		protected boolean includeReadAttribute(Method method, String beanKey) {
			return true;
		}

		protected boolean includeWriteAttribute(Method method, String beanKey) {
			if ("setAge".equals(method.getName())) {
				return false;
			}
			return true;
		}

		protected boolean includeOperation(Method method, String beanKey) {
			if ("dontExposeMe".equals(method.getName())) {
				return false;
			}
			return true;
		}

		protected String getOperationDescription(Method method) {
			return method.getName();
		}

		protected String getAttributeDescription(PropertyDescriptor propertyDescriptor) {
			return propertyDescriptor.getDisplayName();
		}

		protected void populateAttributeDescriptor(Descriptor descriptor, Method getter, Method setter) {

		}

		protected void populateOperationDescriptor(Descriptor descriptor, Method method) {

		}

		protected String getDescription(String beanKey, Class beanClass) {
			return "";
		}

		protected void populateMBeanDescriptor(Descriptor mbeanDescriptor, String beanKey, Class beanClass) {

		}
	}

}

Other Spring Framework examples (source code examples)

Here is a short list of links related to this Spring Framework MBeanClientInterceptorTests.java source code file:

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