001/*
002 * (C) Copyright 2013 Nuxeo SA (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Stephane Lacoin
018 */
019package org.nuxeo.ecm.core.management.jtajca.internal;
020
021import java.util.Arrays;
022import java.util.Collection;
023import java.util.Comparator;
024
025import javax.management.ObjectInstance;
026
027import org.nuxeo.ecm.core.api.CoreInstance;
028import org.nuxeo.ecm.core.api.CoreInstance.RegistrationInfo;
029import org.nuxeo.ecm.core.management.jtajca.CoreSessionMonitor;
030import org.nuxeo.ecm.core.management.jtajca.Defaults;
031import org.nuxeo.runtime.metrics.MetricsService;
032
033import com.codahale.metrics.JmxAttributeGauge;
034import com.codahale.metrics.MetricRegistry;
035import com.codahale.metrics.SharedMetricRegistries;
036
037public class DefaultCoreSessionMonitor implements CoreSessionMonitor {
038
039    // @since 5.7.2
040    protected final MetricRegistry registry = SharedMetricRegistries.getOrCreate(MetricsService.class.getName());
041
042    @Override
043    public int getCount() {
044        return CoreInstance.getInstance().getNumberOfSessions();
045    }
046
047    @Override
048    public String[] getInfos() {
049        return toInfos(toSortedRegistration(CoreInstance.getInstance().getRegistrationInfos()));
050    }
051
052    public RegistrationInfo[] toSortedRegistration(Collection<RegistrationInfo> infos) {
053        RegistrationInfo[] sortedInfos = infos.toArray(new RegistrationInfo[infos.size()]);
054        Arrays.sort(sortedInfos, new Comparator<RegistrationInfo>() {
055
056            @Override
057            public int compare(RegistrationInfo o1, RegistrationInfo o2) {
058                return o2.session.getSessionId().compareTo(o1.session.getSessionId());
059            }
060
061        });
062        return sortedInfos;
063    }
064
065    public String[] toInfos(RegistrationInfo[] infos) {
066        String[] values = new String[infos.length];
067        for (int i = 0; i < infos.length; ++i) {
068            values[i] = Defaults.instance.printStackTrace(infos[i]);
069        }
070        return values;
071    }
072
073    protected ObjectInstance self;
074
075    @Override
076    public void install() {
077        self = DefaultMonitorComponent.bind(CoreSessionMonitor.class, this);
078        registry.register(MetricRegistry.name("nuxeo.repositories", "sessions"),
079                new JmxAttributeGauge(self.getObjectName(), "Count"));
080    }
081
082    @Override
083    public void uninstall() {
084        DefaultMonitorComponent.unbind(self);
085        registry.remove(MetricRegistry.name("nuxeo.repositories", "sessions"));
086        self = null;
087    }
088
089}