com.twitter.ostrich.admin.Service.scala Maven / Gradle / Ivy
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/*
* Copyright 2010 Twitter, Inc.
*
* 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.twitter.ostrich.admin
/**
* A service is any task that can be shutdown or reloaded by the admin server.
*/
trait Service {
/**
* Start this service.
*/
def start()
/**
* Shutdown this service.
*/
def shutdown()
/**
* Stop answering new requests, and close all listening sockets, but only shutdown after the last
* existing client dies. This is to allow servers with long-running clients to stay alive for a
* while and service those connections, while letting another server start up and begin handling
* new connections.
*/
def quiesce() {
shutdown()
}
/**
* Reload configuration, if supported by the service.
*/
def reload() {
// default is to do nothing.
}
}