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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.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 void transferErrorCount(IntentData data, Optional<IntentData> stored) {
if (stored.isPresent()) {
IntentData storedData = stored.get();
if (Objects.equals(data.intent(), storedData.intent()) &&
Objects.equals(data.request(), storedData.request())) {
data.setErrorCount(storedData.errorCount());
} else {
data.setErrorCount(0);
}
}
}
}
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