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JPPF, the open source grid computing solution
/*
* JPPF.
* Copyright (C) 2005-2015 JPPF Team.
* http://www.jppf.org
*
* 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.jppf.load.balancer;
/**
* This is the interface of all strategies for defining bundle task size.
* A Bundler defines the current bundle size using different algorithms, depending on the implementation.
* @author Domingos Creado
* @author Laurent Cohen
*/
public interface Bundler
{
/**
* Get the current size of bundle.
* @return the bundle size as an int value.
*/
int getBundleSize();
/**
* Feedback the bundler with the result of using the bundle with the specified size.
* The feedback data consists in providing a number of tasks that were executed, and their total execution time in milliseconds.
* The execution time includes the network round trip between node and server.
* @param nbTasks number of tasks that were executed.
* @param totalTime the total execution and transport time in nanoseconds.
*/
void feedback(final int nbTasks, final double totalTime);
/**
* Make a copy of this bundler.
* Which parts are actually copied depends on the implementation.
* @return a new Bundler
instance.
*/
Bundler copy();
/**
* Get the timestamp at which this bundler was created.
* This is used to enable node channels to know when the bundler settings have changed.
* @return the timestamp as a long value.
*/
long getTimestamp();
/**
* Release the resources used by this bundler.
*/
void dispose();
/**
* Perform context-independent initializations.
*/
void setup();
/**
* Get the parameters profile used by this load-balancer.
* @return an instance of LoadBalancingProfile
.
*/
LoadBalancingProfile getProfile();
}
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