/*
* RHQ Management Platform
* Copyright (C) 2005-2009 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 as published by
* the Free Software Foundation version 2 of the License.
*
* 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 for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package org.rhq.plugins.hosts;
import java.io.File;
import java.util.Collections;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.InvalidPluginConfigurationException;
import org.rhq.core.pluginapi.inventory.ResourceDiscoveryContext;
import org.rhq.plugins.augeas.AugeasConfigurationComponent;
import org.rhq.plugins.augeas.AugeasConfigurationDiscoveryComponent;
import org.rhq.plugins.platform.PlatformComponent;
/**
* The ResourceDiscoveryComponent for the "Hosts File" ResourceType.
*
* @author Ian Springer
*/
public class HostsDiscoveryComponent extends AugeasConfigurationDiscoveryComponent<PlatformComponent> {
private static final boolean IS_WINDOWS = (File.separatorChar == '\\');
private final Log log = LogFactory.getLog(this.getClass());
@Override
public Set discoverResources(ResourceDiscoveryContext<PlatformComponent> discoveryContext) throws InvalidPluginConfigurationException,
Exception
{
return super.discoverResources(discoveryContext);
}
@Override
public DiscoveredResourceDetails discoverResource(Configuration pluginConfig,
ResourceDiscoveryContext discoveryContext) throws InvalidPluginConfigurationException
{
return super.discoverResource(pluginConfig, discoveryContext);
}
@Override
protected List<String> determineIncludeGlobs(ResourceDiscoveryContext<PlatformComponent> discoveryContext)
{
Configuration defaultPluginConfig = discoveryContext.getDefaultPluginConfiguration();
String includeGlobs = defaultPluginConfig.getSimpleValue(AugeasConfigurationComponent.INCLUDE_GLOBS_PROP, null);
if (includeGlobs != null) {
return super.determineIncludeGlobs(discoveryContext);
} else {
File hostsFile;
if (IS_WINDOWS) {
File windowsDir = getWindowsDir(discoveryContext);
hostsFile = new File(windowsDir, "system32/drivers/etc/hosts");
} else {
hostsFile = new File("/etc/hosts");
}
return Collections.singletonList(hostsFile.getPath());
}
}
private File getWindowsDir(ResourceDiscoveryContext<PlatformComponent> discoveryContext) {
File windowsDir = null;
String windowsDirPath = System.getenv().get("SystemRoot");
if (windowsDirPath != null) {
windowsDir = new File(windowsDirPath);
if (!windowsDir.isDirectory()) {
windowsDirPath = System.getenv().get("WinDir");
if (windowsDirPath != null) {
windowsDir = new File(windowsDirPath);
if (!windowsDir.isDirectory()) {
windowsDir = new File("C:\\WINDOWS");
if (!windowsDir.isDirectory()) {
windowsDir = new File("C:\\WINNT");
if (!windowsDir.isDirectory()) {
windowsDir = null;
}
}
}
}
}
}
if (windowsDir == null) {
throw new IllegalStateException("Failed to determine Windows directory.");
}
log.debug("Windows directory: " + windowsDir);
return windowsDir;
}
}