org.springframework.integration.jmx.DefaultMBeanObjectConverter Maven / Gradle / Ivy

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/*
 * Copyright 2013-2016 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.integration.jmx;

import java.lang.reflect.Array;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.management.MBeanAttributeInfo;
import javax.management.MBeanInfo;
import javax.management.MBeanServerConnection;
import javax.management.ObjectInstance;
import javax.management.ObjectName;
import javax.management.RuntimeMBeanException;
import javax.management.openmbean.CompositeData;
import javax.management.openmbean.TabularData;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * @author Stuart Williams
 * @since 3.0
 *
 */
public class DefaultMBeanObjectConverter implements MBeanObjectConverter {

	private static final Log log = LogFactory.getLog(DefaultMBeanObjectConverter.class);

	private final MBeanAttributeFilter filter;

	public DefaultMBeanObjectConverter() {
		this(new DefaultMBeanAttributeFilter());
	}

	public DefaultMBeanObjectConverter(MBeanAttributeFilter filter) {
		this.filter = filter;
	}

	@Override
	public Object convert(MBeanServerConnection connection, ObjectInstance instance) {
		Map attributeMap = new HashMap();

		try {
			ObjectName objName = instance.getObjectName();
			if (!connection.isRegistered(objName)) {
				return attributeMap;
			}

			MBeanInfo info = connection.getMBeanInfo(objName);
			MBeanAttributeInfo[] attributeInfos = info.getAttributes();

			for (MBeanAttributeInfo attrInfo : attributeInfos) {
				// we don't need to repeat name of this as an attribute
				if ("ObjectName".equals(attrInfo.getName()) || !this.filter.accept(objName, attrInfo.getName())) {
					continue;
				}

				Object value;
				try {
					value = connection.getAttribute(objName, attrInfo.getName());
				}
				catch (RuntimeMBeanException e) {
					// N.B. standard MemoryUsage MBeans will throw an exception when some
					// measurement is unsupported. Logging at trace rather than debug to
					// avoid confusion.
					if (log.isTraceEnabled()) {
						log.trace("Error getting attribute '" + attrInfo.getName() + "' on '" + objName + "'", e);
					}

					// try to unwrap the exception somewhat; not sure this is ideal
					Throwable t = e;
					while (t.getCause() != null) {
						t = t.getCause();
					}
					value = String.format("%s[%s]", t.getClass().getName(), t.getMessage());
				}

				attributeMap.put(attrInfo.getName(), checkAndConvert(value));
			}

		}
		catch (Exception e) {
			throw new IllegalArgumentException(e);
		}

		return attributeMap;
	}

	/**
	 * @param input
	 * @return recursively mapped object
	 */
	private Object checkAndConvert(Object input) {
		if (input == null) {
			return input;
		}
		else if (input.getClass().isArray()) {

			if (CompositeData.class.isAssignableFrom(input.getClass().getComponentType())) {
				List