/**
* Copyright 2008 Google 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 org.waveprotocol.wave.client.scheduler;
/**
* A simple timer that is associated with a specific task that may be
* scheduled/cancelled. Because it is associated with a specific task, it may be
* efficiently implemented to avoid unecessary object creation and other
* overheads when scheduling.
*
* Rather than having the interface mandate mutability through a setter for the
* runnable task, a factory interface is instead provided for most uses.
*
* @author danilatos@google.com (Daniel Danilatos)
*/
public interface SimpleTimer {
/**
* Factory to create a simple timer.
*/
public interface Factory {
/** Factory method */
SimpleTimer create(Runnable runnable);
}
/**
* @return The current time in millis, as a double
*/
double getTime();
/**
* Run the task at the next available opportunity. Implicitly cancels any
* other scheduling.
*/
void schedule();
/**
* Run the task at the next available opportunity, but no earlier than the
* given time. Implicitly cancels any other scheduling.
*
* @param when
*/
void schedule(double when);
/**
* Cancel any scheduled running of the task.
*/
void cancel();
}