TomcatCacheDiscoveryComponent.java

/*
 * Jopr Management Platform
 * Copyright (C) 2005-2008 Red Hat, Inc.
 * All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation, and/or the GNU Lesser
 * General Public License, version 2.1, also as published by the Free
 * Software Foundation.
 *
 * This program 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 and the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License
 * and the GNU Lesser General Public License along with this program;
 * if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */

package org.jboss.on.plugins.tomcat;

import java.util.Set;

import org.rhq.core.domain.configuration.Configuration;
import org.rhq.core.domain.configuration.PropertySimple;
import org.rhq.core.pluginapi.inventory.DiscoveredResourceDetails;
import org.rhq.core.pluginapi.inventory.ResourceDiscoveryContext;
import org.rhq.plugins.jmx.MBeanResourceDiscoveryComponent;

/**
 * Discover Application Cache
 * 
 * @author Jay Shaughnessy
 * @author Heiko W. Rupp
 *
 */
public class TomcatCacheDiscoveryComponent extends MBeanResourceDiscoveryComponent<TomcatWarComponent> {

    @Override
    public Set<DiscoveredResourceDetails> discoverResources(ResourceDiscoveryContext<TomcatWarComponent> discoveryContext) {

    	String objectNameTemplate = "";
    	Set<DiscoveredResourceDetails> resources;

        Configuration defaultPluginConfig = discoveryContext.getDefaultPluginConfiguration();
        String host = discoveryContext.getParentResourceContext().getPluginConfiguration().getSimpleValue(TomcatWarComponent.PROPERTY_VHOST, null);
        String path = discoveryContext.getParentResourceContext().getPluginConfiguration().getSimpleValue(TomcatWarComponent.PROPERTY_CONTEXT_ROOT, null);

        objectNameTemplate = defaultPluginConfig.getSimple(PROPERTY_OBJECT_NAME).getStringValue();
        objectNameTemplate = objectNameTemplate.replace("%host%", host);
        objectNameTemplate = objectNameTemplate.replace("%path%", path);
        defaultPluginConfig.put(new PropertySimple(PROPERTY_OBJECT_NAME, objectNameTemplate));

        resources = super.performDiscovery(defaultPluginConfig, discoveryContext.getParentResourceComponent(), discoveryContext.getResourceType());

        if (resources.size() == 0) {
            objectNameTemplate = getCacheObjectName();
            objectNameTemplate = objectNameTemplate.replace("%host%", host);
            objectNameTemplate = objectNameTemplate.replace("%path%", path);
            defaultPluginConfig.put(new PropertySimple(PROPERTY_OBJECT_NAME, objectNameTemplate));
            resources = super.performDiscovery(defaultPluginConfig, discoveryContext.getParentResourceComponent(), discoveryContext.getResourceType());
        }
        // returns only one resource.
        for (DiscoveredResourceDetails detail : resources) {
            Configuration pluginConfiguration = detail.getPluginConfiguration();
            pluginConfiguration.put(new PropertySimple(TomcatCacheComponent.PROPERTY_HOST, host));
            pluginConfiguration.put(new PropertySimple(TomcatCacheComponent.PROPERTY_PATH, path));
            String resourceName = detail.getResourceName();
            detail.setResourceName(resourceName);
        }
        return resources;
    }

    private String getCacheObjectName() {
        return "Catalina:type=Cache,host=%host%,context=%path%";
    }
}