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A bundle project producing JAX-RS RI bundles. The primary artifact is an "all-in-one" OSGi-fied JAX-RS RI bundle (jaxrs-ri.jar). Attached to that are two compressed JAX-RS RI archives. The first archive (jaxrs-ri.zip) consists of binary RI bits and contains the API jar (under "api" directory), RI libraries (under "lib" directory) as well as all external RI dependencies (under "ext" directory). The secondary archive (jaxrs-ri-src.zip) contains buildable JAX-RS RI source bundle and contains the API jar (under "api" directory), RI sources (under "src" directory) as well as all external RI dependencies (under "ext" directory). The second archive also contains "build.xml" ANT script that builds the RI sources. To build the JAX-RS RI simply unzip the archive, cd to the created jaxrs-ri directory and invoke "ant" from the command line.

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/*
 * Copyright (c) 2013, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0, which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 *
 * This Source Code may also be made available under the following Secondary
 * Licenses when the conditions for such availability set forth in the
 * Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
 * version 2 with the GNU Classpath Exception, which is available at
 * https://www.gnu.org/software/classpath/license.html.
 *
 * SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
 */

package org.glassfish.jersey.server.internal.monitoring.jmx;

import java.util.HashMap;
import java.util.Map;

import javax.management.Attribute;
import javax.management.AttributeList;
import javax.management.AttributeNotFoundException;
import javax.management.DynamicMBean;
import javax.management.InvalidAttributeValueException;
import javax.management.MBeanAttributeInfo;
import javax.management.MBeanException;
import javax.management.MBeanInfo;
import javax.management.ReflectionException;

import org.glassfish.jersey.internal.util.collection.Value;
import org.glassfish.jersey.server.monitoring.ExecutionStatistics;
import org.glassfish.jersey.server.monitoring.TimeWindowStatistics;

/**
 * Dynamic MBean that exposes information about execution statistics. The exposed information contains
 * execution statistics for various time window sizes.
 *
 * @author Miroslav Fuksa
 */
public class ExecutionStatisticsDynamicBean implements DynamicMBean {

    private volatile ExecutionStatistics executionStatistics;
    private final Map> attributeValues = new HashMap<>();

    private final MBeanInfo mBeanInfo;

    private MBeanInfo initMBeanInfo(final ExecutionStatistics initialStatistics) {
        final Map statsMap = initialStatistics.getTimeWindowStatistics();
        MBeanAttributeInfo[] attrs = new MBeanAttributeInfo[statsMap.size() * 5];
        int i = 0;
        for (final TimeWindowStatistics stats : statsMap.values()) {
            final long interval = stats.getTimeWindow();
            final String postfix = convertIntervalToString((int) interval);

            String name = "MinTime[ms]_" + postfix;
            attrs[i++] = new MBeanAttributeInfo(name, "long", "Minimum request processing time in milliseconds in last "
                    + postfix + ".", true, false, false);

            attributeValues.put(name, new Value() {
                @Override
                public Object get() {
                    return executionStatistics.getTimeWindowStatistics().get(interval).getMinimumDuration();
                }
            });

            name = "MaxTime[ms]_" + postfix;
            attrs[i++] = new MBeanAttributeInfo(name, "long", "Minimum request processing time  in milliseconds in last "
                    + postfix + ".", true, false, false);

            attributeValues.put(name, new Value() {
                @Override
                public Object get() {
                    return executionStatistics.getTimeWindowStatistics().get(interval).getMaximumDuration();
                }
            });

            name = "AverageTime[ms]_" + postfix;
            attrs[i++] = new MBeanAttributeInfo(name, "long", "Average request processing time in milliseconds in last "
                    + postfix + ".", true, false, false);

            attributeValues.put(name, new Value() {
                @Override
                public Object get() {
                    return executionStatistics.getTimeWindowStatistics().get(interval).getAverageDuration();
                }
            });

            name = "RequestRate[requestsPerSeconds]_" + postfix;
            attrs[i++] = new MBeanAttributeInfo(name, "double", "Average requests per second in last "
                    + postfix + ".", true, false, false);

            attributeValues.put(name, new Value() {
                @Override
                public Object get() {
                    return executionStatistics.getTimeWindowStatistics().get(interval).getRequestsPerSecond();
                }
            });

            name = "RequestCount_" + postfix;
            attrs[i++] = new MBeanAttributeInfo(name, "double", "Request count in last "
                    + postfix + ".", true, false, false);

            attributeValues.put(name, new Value() {
                @Override
                public Object get() {
                    return executionStatistics.getTimeWindowStatistics().get(interval).getRequestCount();
                }
            });
        }

        return new MBeanInfo(this.getClass().getName(), "Execution statistics", attrs, null, null, null);
    }

    private String convertIntervalToString(int interval) {
        int hours = (int) interval / 3600000;
        interval = interval - hours * 3600000;
        int minutes = (int) interval / 60000;
        interval = interval - minutes * 60000;
        int seconds = (int) interval / 1000;
        StringBuffer sb = new StringBuffer();
        if (hours > 0) {
            sb.append(hours).append("h_");
        }
        if (minutes > 0) {
            sb.append(minutes).append("m_");
        }
        if (seconds > 0) {
            sb.append(seconds).append("s_");
        }
        if (sb.length() == 0) {
            sb.append("total");
        } else {
            sb.setLength(sb.length() - 1);
        }

        return sb.toString();
    }

    /**
     * Create a new MXBean and register it into the mbean server using {@code mBeanExposer}.
     * @param executionStatistics Execution statistics to be exposed.
     * @param mBeanExposer mbean exposer.
     * @param parentBeanName Name of the parent mxbean.
     * @param beanName A required name of this exposed bean.
     */
    public ExecutionStatisticsDynamicBean(ExecutionStatistics executionStatistics, MBeanExposer mBeanExposer,
                                          String parentBeanName, String beanName) {
        this.executionStatistics = executionStatistics;
        this.mBeanInfo = initMBeanInfo(executionStatistics);
        mBeanExposer.registerMBean(this, parentBeanName + ",executionTimes=" + beanName);

    }

    /**
     * Update the execution statistics that are exposed by this MBean.
     * @param executionStatistics New execution statistics.
     */
    public void updateExecutionStatistics(ExecutionStatistics executionStatistics) {
        this.executionStatistics = executionStatistics;
    }

    @Override
    public Object getAttribute(String attribute) throws AttributeNotFoundException, MBeanException, ReflectionException {
        return attributeValues.get(attribute).get();
    }

    @Override
    public void setAttribute(Attribute attribute)
            throws AttributeNotFoundException, InvalidAttributeValueException, MBeanException, ReflectionException {
    }

    @Override
    public AttributeList getAttributes(String[] attributes) {
        // TODO: implement
        return null;
    }

    @Override
    public AttributeList setAttributes(AttributeList attributes) {
        return null;
    }

    @Override
    public Object invoke(String actionName, Object[] params, String[] signature) throws MBeanException, ReflectionException {
        return null;
    }

    @Override
    public MBeanInfo getMBeanInfo() {
        return mBeanInfo;
    }
}
 















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