| /* |
| * Copyright 2018-present Open Networking Foundation |
| * |
| * 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.workflow.impl; |
| |
| import com.google.common.collect.ArrayListMultimap; |
| import com.google.common.collect.ListMultimap; |
| import org.onlab.util.AbstractAccumulator; |
| import org.onosproject.workflow.api.HandlerTask; |
| import org.onosproject.workflow.api.HandlerTaskBatchDelegate; |
| |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.Timer; |
| |
| /** |
| * An accumulator for building batches of event task operations. Only one batch should |
| * be in process per instance at a time. |
| */ |
| public class HandlerTaskAccumulator extends AbstractAccumulator<HandlerTask> { |
| |
| private static final int DEFAULT_MAX_EVENTS = 5000; |
| private static final int DEFAULT_MAX_IDLE_MS = 10; |
| private static final int DEFAULT_MAX_BATCH_MS = 50; |
| |
| private static final Timer TIMER = new Timer("onos-workflow-handlertask-batching"); |
| |
| private final HandlerTaskBatchDelegate delegate; |
| |
| private volatile boolean ready; |
| |
| /** |
| * Creates an event-task operation accumulator. |
| * |
| * @param delegate the event-task batch delegate |
| */ |
| protected HandlerTaskAccumulator(HandlerTaskBatchDelegate delegate) { |
| super(TIMER, DEFAULT_MAX_EVENTS, DEFAULT_MAX_BATCH_MS, DEFAULT_MAX_IDLE_MS); |
| this.delegate = delegate; |
| // Assume that the delegate is ready for workletType at the start |
| ready = true; //TODO validate the assumption that delegate is ready |
| } |
| |
| @Override |
| public void processItems(List<HandlerTask> items) { |
| ready = false; |
| delegate.execute(epoch(items)); |
| } |
| |
| /** |
| * Gets epoch. |
| * @param ops handler tasks |
| * @return collection of collection of handler task. |
| */ |
| private Collection<Collection<HandlerTask>> epoch(List<HandlerTask> ops) { |
| |
| ListMultimap<String, HandlerTask> tasks = ArrayListMultimap.create(); |
| |
| // align event-tasks with context |
| for (HandlerTask op : ops) { |
| tasks.put(op.context().name(), op); |
| } |
| |
| return tasks.asMap().values(); |
| } |
| |
| @Override |
| public boolean isReady() { |
| return ready; |
| } |
| |
| /** |
| * Making accumulator to be ready. |
| */ |
| public void ready() { |
| ready = true; |
| } |
| } |