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/*
* Copyright 2015 Open Networking Laboratory
*
* 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.onosproject.net.intent.impl;
import com.google.common.collect.Maps;
import org.onlab.util.AbstractAccumulator;
import org.onosproject.net.intent.IntentBatchDelegate;
import org.onosproject.net.intent.IntentData;
import org.onosproject.net.intent.Key;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Timer;
/**
* An accumulator for building batches of intent operations. Only one batch should
* be in process per instance at a time.
*/
public class IntentAccumulator extends AbstractAccumulator<IntentData> {
private static final int DEFAULT_MAX_EVENTS = 1000;
private static final int DEFAULT_MAX_IDLE_MS = 10;
private static final int DEFAULT_MAX_BATCH_MS = 50;
// FIXME: Replace with a system-wide timer instance;
// TODO: Convert to use HashedWheelTimer or produce a variant of that; then decide which we want to adopt
private static final Timer TIMER = new Timer("onos-intent-op-batching");
private final IntentBatchDelegate delegate;
private volatile boolean ready;
/**
* Creates an intent operation accumulator.
*
* @param delegate the intent batch delegate
*/
protected IntentAccumulator(IntentBatchDelegate delegate) {
super(TIMER, DEFAULT_MAX_EVENTS, DEFAULT_MAX_BATCH_MS, DEFAULT_MAX_IDLE_MS);
this.delegate = delegate;
// Assume that the delegate is ready for work at the start
ready = true; //TODO validate the assumption that delegate is ready
}
@Override
public void processItems(List<IntentData> items) {
ready = false;
delegate.execute(reduce(items));
}
private Collection<IntentData> reduce(List<IntentData> ops) {
Map<Key, IntentData> map = Maps.newHashMap();
for (IntentData op : ops) {
map.put(op.key(), op);
}
//TODO check the version... or maybe store will handle this.
return map.values();
}
@Override
public boolean isReady() {
return ready;
}
public void ready() {
ready = true;
}
}
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