com.google.code.play2.watcher.api.FileWatchServices Maven / Gradle / Ivy
/*
* Copyright 2013-2017 Grzegorz Slowikowski (gslowikowski at gmail dot com)
*
* Licensed 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 com.google.code.play2.watcher.api;
import java.util.Locale;
/**
* Helper class.
*
* @author Grzegorz Slowikowski
*/
public class FileWatchServices
{
/**
* Returns default watch service identifier based on operating system.
*
* @return watch service id
*/
public static String getDefaultWatchServiceId()
{
String result = "polling";
String osName = System.getProperty( "os.name" );
if ( osName != null )
{
osName = osName.toLowerCase( Locale.ENGLISH );
if ( osName.contains( "windows" ) || osName.contains( "linux" ) )
{
result = isAtLeastJava7() ? "jdk7" : "jnotify";
}
else if ( osName.contains( "mac" ) )
{
result = "jnotify";
}
}
return result;
}
private static boolean isAtLeastJava7()
{
boolean result = false;
try
{
Class.forName( "java.nio.file.WatchService" );
result = true;
}
catch ( Throwable t )
{
// ignore
}
return result;
}
}