/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.guacamole.properties;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Properties;
import org.apache.guacamole.GuacamoleException;
import org.apache.guacamole.GuacamoleServerException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Simple utility class for reading properties from the guacamole.properties
* file. The guacamole.properties file is preferably located in the servlet
* container's user's home directory, in a subdirectory called .guacamole, or
* in the directory set by the system property: guacamole.home.
*
* If none of those locations are possible, guacamole.properties will also
* be read from the root of the classpath.
*
* @deprecated
* @author Michael Jumper
*/
public class GuacamoleProperties {
/**
* Logger for this class.
*/
private static final Logger logger = LoggerFactory.getLogger(GuacamoleProperties.class);
static {
// Warn about deprecation
logger.warn("GuacamoleProperties is deprecated. Please use Environment instead.");
}
/**
* GuacamoleProperties is a utility class and cannot be instantiated.
*/
private GuacamoleProperties() {}
/**
* The hostname of the server where guacd (the Guacamole proxy server) is
* running.
*/
public static final StringGuacamoleProperty GUACD_HOSTNAME = new StringGuacamoleProperty() {
@Override
public String getName() { return "guacd-hostname"; }
};
/**
* The port that guacd (the Guacamole proxy server) is listening on.
*/
public static final IntegerGuacamoleProperty GUACD_PORT = new IntegerGuacamoleProperty() {
@Override
public String getName() { return "guacd-port"; }
};
/**
* Whether guacd requires SSL/TLS on connections.
*/
public static final BooleanGuacamoleProperty GUACD_SSL = new BooleanGuacamoleProperty() {
@Override
public String getName() { return "guacd-ssl"; }
};
/**
* All properties read from guacamole.properties when this class was first
* used.
*/
private static final Properties properties;
/**
* Any error encountered when reading guacamole.properties was last
* attempted.
*/
private static GuacamoleException exception;
static {
properties = new Properties();
try {
// Attempt to find Guacamole home
File guacHome = GuacamoleHome.getDirectory();
InputStream stream;
// If not a directory, load from classpath
if (!guacHome.isDirectory()) {
// Read from classpath
stream = GuacamoleProperties.class.getResourceAsStream("/guacamole.properties");
if (stream == null)
throw new IOException(
"guacamole.properties not loaded from " + guacHome
+ " (not a directory), and guacamole.properties could"
+ " not be found as a resource in the classpath.");
}
// Otherwise, try to load from file
else
stream = new FileInputStream(new File(guacHome, "guacamole.properties"));
// Load properties, always close stream
try { properties.load(stream); }
finally { stream.close(); }
}
catch (IOException e) {
exception = new GuacamoleServerException("Error reading guacamole.properties", e);
}
}
/**
* Given a GuacamoleProperty, parses and returns the value set for that
* property in guacamole.properties, if any.
*
* @param <Type> The type that the given property is parsed into.
* @param property The property to read from guacamole.properties.
* @return The parsed value of the property as read from
* guacamole.properties.
* @throws GuacamoleException If an error occurs while parsing the value
* for the given property in
* guacamole.properties.
*/
public static <Type> Type getProperty(GuacamoleProperty<Type> property) throws GuacamoleException {
if (exception != null)
throw exception;
return property.parseValue(properties.getProperty(property.getName()));
}
/**
* Given a GuacamoleProperty, parses and returns the value set for that
* property in guacamole.properties, if any. If no value is found, the
* provided default value is returned.
*
* @param <Type> The type that the given property is parsed into.
* @param property The property to read from guacamole.properties.
* @param defaultValue The value to return if no value was given in
* guacamole.properties.
* @return The parsed value of the property as read from
* guacamole.properties, or the provided default value if no value
* was found.
* @throws GuacamoleException If an error occurs while parsing the value
* for the given property in
* guacamole.properties.
*/
public static <Type> Type getProperty(GuacamoleProperty<Type> property,
Type defaultValue) throws GuacamoleException {
Type value = getProperty(property);
if (value == null)
return defaultValue;
return value;
}
/**
* Given a GuacamoleProperty, parses and returns the value set for that
* property in guacamole.properties. An exception is thrown if the value
* is not provided.
*
* @param <Type> The type that the given property is parsed into.
* @param property The property to read from guacamole.properties.
* @return The parsed value of the property as read from
* guacamole.properties.
* @throws GuacamoleException If an error occurs while parsing the value
* for the given property in
* guacamole.properties, or if the property is
* not specified.
*/
public static <Type> Type getRequiredProperty(GuacamoleProperty<Type> property)
throws GuacamoleException {
Type value = getProperty(property);
if (value == null)
throw new GuacamoleServerException("Property " + property.getName() + " is required.");
return value;
}
}