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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in compliance with the License. You can
* obtain a copy of the License at
* https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* If you wish your version of this file to be governed by only the CDDL or
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* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
* only if the new code is made subject to such option by the copyright
* holder.
*/
/*
* Class.java
*
* Created on November 11, 2003, 1:45 PM
*/
package org.glassfish.config.support;
import com.sun.enterprise.config.serverbeans.Domain;
import com.sun.enterprise.config.serverbeans.Server;
import com.sun.enterprise.config.serverbeans.Cluster;
import com.sun.enterprise.config.serverbeans.Config;
import com.sun.enterprise.config.serverbeans.SystemProperty;
import java.util.List;
/**
* Utility for getting the value of a system-property of an instance, particularly
* for an instance that is not the current running instance. The current running
* instance automatically has tokens in the config resolved. The value returned is
* the value of the system property which has the highest precedence.
* The system-property defined at higher precedence levels
* overrides system-property defined at lower precedence levels.
* The order of precedence from highest to lowest is
* 1. server
* 2. cluster
* 3. config
* 4. domain
*
* @author kebbs
* @author Jennifer Chou
*/
public class PropertyResolver {
private Domain _domain = null;
private Cluster _cluster = null;
private Server _server = null;
private Config _config = null;
public PropertyResolver(Domain domain, String instanceName) {
_domain = domain;
_server = _domain.getServerNamed(instanceName);
if (_server != null) {
_config = _domain.getConfigNamed(_server.getConfigRef());
} else {
_config = _domain.getConfigNamed(instanceName);
}
_cluster = _domain.getClusterForInstance(instanceName);
}
/**
* Given a propery name, return its corresponding value in the specified
* SystemProperty array. Return null if the property is not found.
*/
private String getPropertyValue(String propName, List props) {
String propVal = null;
for (SystemProperty prop : props) {
if (prop.getName().equals(propName)) {
return prop.getValue();
}
}
return propVal;
}
/**
* Given a property name, return its corresponding value as defined in
* the domain, configuration, cluster, or server element. Return null if the property
* is not found. Property values at the server override those at the configuration
* which override those at the domain level.
* Does not check if the property is available in java.lang.System.
* This restriction is to prevent incorrect values being returned when trying
* to retrieve properties for instances other than the currently running server (such as DAS).
* In this case, we don't want to incorrectly return the DAS java.lang.System property.
*/
public String getPropertyValue(String propName) {
if (propName.startsWith("${") && propName.endsWith("}")) {
propName = propName.substring(2, propName.lastIndexOf("}"));
}
String propVal = null;
//First look for a server instance property matching the propName
if (_server != null) {
propVal = getPropertyValue(propName, _server.getSystemProperty());
}
if (propVal == null) {
if (_cluster != null) {
//If not found in the server instance, look for the propName in the
//cluster
propVal = getPropertyValue(propName, _cluster.getSystemProperty());
}
if (propVal == null) {
if (_config != null) {
//If not found in the server instance or cluster, look for the
//propName in the config
propVal = getPropertyValue(propName, _config.getSystemProperty());
if (propVal == null) {
if (_domain != null) {
//Finally if the property is not found in the server, cluster,
//or configuration, look for the propName in the domain
propVal = getPropertyValue(propName, _domain.getSystemProperty());
}
}
}
}
}
return propVal;
}
}
