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Cayenne Object Persistence Framework
/*****************************************************************
* 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.cayenne.conf;
import java.io.IOException;
import java.io.InputStream;
import java.sql.Connection;
import java.util.Properties;
import org.apache.cayenne.ConfigurationException;
import org.apache.cayenne.util.ResourceLocator;
import org.apache.commons.pool.impl.GenericObjectPool;
/**
* A helper class providing access to DBCP properties.
*
* @author Andrus Adamchik
* @since 2.0
*/
class DBCPDataSourceProperties {
private static final String PROPERTY_PREFIX = "cayenne.dbcp.";
private Properties properties;
/**
* Loads properties from the specified location.
*/
private static Properties loadProperties(
ResourceLocator resourceLocator,
String location) throws IOException {
InputStream in = resourceLocator.findResourceStream(location);
// try appending ".properties" extension..
if (in == null && !location.endsWith(".properties")) {
in = resourceLocator.findResourceStream(location + ".properties");
}
if (in == null) {
throw new ConfigurationException("DBCP properties file not found: "
+ location);
}
Properties properties = new Properties();
try {
properties.load(in);
}
finally {
try {
in.close();
}
catch (IOException e) {
}
}
return properties;
}
DBCPDataSourceProperties(ResourceLocator resourceLocator, String location)
throws IOException {
this(loadProperties(resourceLocator, location));
}
DBCPDataSourceProperties(Properties properties) {
this.properties = properties;
}
Properties getProperties() {
return properties;
}
String getString(String property, boolean required) {
String value = properties.getProperty(PROPERTY_PREFIX + property);
if (required && value == null) {
throw new ConfigurationException("No value for required property: "
+ PROPERTY_PREFIX
+ property);
}
return value;
}
String getString(String property) {
return getString(property, false);
}
boolean getBoolean(String property, boolean defaultValue) {
String value = getString(property);
return (value != null)
? "true".equalsIgnoreCase(getString(property))
: defaultValue;
}
int getInt(String property, int defaultValue) {
String value = getString(property);
try {
return (value != null) ? Integer.parseInt(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
long getLong(String property, long defaultValue) {
String value = getString(property);
try {
return (value != null) ? Long.parseLong(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
byte getByte(String property, byte defaultValue) {
String value = getString(property);
try {
return (value != null) ? Byte.parseByte(value) : defaultValue;
}
catch (NumberFormatException nfex) {
return defaultValue;
}
}
byte getWhenExhaustedAction(String property, byte defaultValue)
throws ConfigurationException {
String value = getString(property);
if (value == null) {
return defaultValue;
}
// try byte...
try {
return Byte.parseByte(value);
}
catch (NumberFormatException nfex) {
// try symbolic
try {
return GenericObjectPool.class.getField(value).getByte(null);
}
catch (Throwable th) {
throw new ConfigurationException("Invalid 'whenExhaustedAction': "
+ value);
}
}
}
int getTransactionIsolation(String property, int defaultValue) {
String value = getString(property);
if (value == null) {
return defaultValue;
}
// try int...
try {
return Integer.parseInt(value);
}
catch (NumberFormatException nfex) {
// try symbolic
try {
return Connection.class.getField(value).getInt(null);
}
catch (Throwable th) {
throw new ConfigurationException(
"Invalid 'defaultTransactionIsolation': " + value);
}
}
}
}
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