| /* |
| * Copyright 2015-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.net.intent.impl.phase; |
| |
| import org.onosproject.net.intent.IntentData; |
| import org.onosproject.net.intent.impl.IntentProcessor; |
| |
| import java.util.Objects; |
| import java.util.Optional; |
| |
| /** |
| * Represents a phase of processing an intent. |
| */ |
| public interface IntentProcessPhase { |
| |
| /** |
| * Execute the procedure represented by the instance |
| * and generates the next update instance. |
| * |
| * @return next update |
| */ |
| Optional<IntentProcessPhase> execute(); |
| |
| /** |
| * Create a starting intent process phase according to intent data this class holds. |
| * |
| * @param processor intent processor to be passed to intent process phases |
| * generated while this instance is working |
| * @param data intent data to be processed |
| * @param current intent date that is stored in the store |
| * @return starting intent process phase |
| */ |
| static IntentProcessPhase newInitialPhase(IntentProcessor processor, |
| IntentData data, IntentData current) { |
| switch (data.request()) { |
| case INSTALL_REQ: |
| return new InstallRequest(processor, data, Optional.ofNullable(current)); |
| case WITHDRAW_REQ: |
| return new WithdrawRequest(processor, data, Optional.ofNullable(current)); |
| case PURGE_REQ: |
| return new PurgeRequest(data, Optional.ofNullable(current)); |
| default: |
| // illegal state |
| return new Failed(data); |
| } |
| } |
| |
| static FinalIntentProcessPhase process(IntentProcessPhase initial) { |
| Optional<IntentProcessPhase> currentPhase = Optional.of(initial); |
| IntentProcessPhase previousPhase = initial; |
| |
| while (currentPhase.isPresent()) { |
| previousPhase = currentPhase.get(); |
| currentPhase = previousPhase.execute(); |
| } |
| return (FinalIntentProcessPhase) previousPhase; |
| } |
| |
| static void transferErrorCount(IntentData data, Optional<IntentData> stored) { |
| stored.ifPresent(storedData -> { |
| if (Objects.equals(data.intent(), storedData.intent()) && |
| Objects.equals(data.request(), storedData.request())) { |
| data.setErrorCount(storedData.errorCount()); |
| } else { |
| data.setErrorCount(0); |
| } |
| }); |
| } |
| } |