| /* |
| * Copyright 2015-present 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; |
| } |
| } |