com.arpnetworking.metrics.impl.HostProvider Maven / Gradle / Ivy
/**
* Copyright 2015 Groupon.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.arpnetworking.metrics.impl;
import java.net.InetAddress;
import java.net.UnknownHostException;
/**
* Interface for providing the local host name.
*
* @author Ville Koskela (vkoskela at groupon dot com)
*/
/* package private */ interface HostProvider {
/**
* Return the host name.
*
* @return The host name.
* @throws java.net.UnknownHostException If the host name cannot be determined.
*/
String get() throws UnknownHostException;
/**
* Default instance of HostProvider.
*/
HostProvider DEFAULT = new DefaultHostProvider();
/**
* Default implementation of HostProvider using InetAddress.
*/
/* package private static final */ class DefaultHostProvider implements HostProvider {
public String get() throws UnknownHostException {
return InetAddress.getLocalHost().getCanonicalHostName();
}
}
}