org.onosproject.net.intent.IntentData Maven / Gradle / Ivy
/*
* 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;
import com.google.common.annotations.Beta;
import com.google.common.base.MoreObjects;
import com.google.common.collect.ImmutableList;
import org.onosproject.cluster.NodeId;
import org.onosproject.store.Timestamp;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collections;
import java.util.List;
import java.util.Objects;
import static com.google.common.base.Preconditions.checkNotNull;
import static org.onosproject.net.intent.IntentState.*;
/**
* A wrapper class that contains an intents, its state, and other metadata for
* internal use.
*/
@Beta
public class IntentData { //FIXME need to make this "immutable"
// manager should be able to mutate a local copy while processing
private static final Logger log = LoggerFactory.getLogger(IntentData.class);
private final Intent intent;
private final IntentState request; //TODO perhaps we want a full fledged object for requests
private IntentState state;
private Timestamp version;
private NodeId origin;
private int errorCount;
private List installables;
/**
* Creates a new intent data object.
*
* @param intent intent this metadata references
* @param state intent state
* @param version version of the intent for this key
*/
public IntentData(Intent intent, IntentState state, Timestamp version) {
checkNotNull(intent);
checkNotNull(state);
this.intent = intent;
this.state = state;
this.request = state;
this.version = version;
}
/**
* Creates a new intent data object.
*
* @param intent intent this metadata references
* @param state intent state
* @param version version of the intent for this key
* @param origin ID of the node where the data was originally created
*/
public IntentData(Intent intent, IntentState state, Timestamp version, NodeId origin) {
checkNotNull(intent);
checkNotNull(state);
checkNotNull(version);
checkNotNull(origin);
this.intent = intent;
this.state = state;
this.request = state;
this.version = version;
this.origin = origin;
}
/**
* Copy constructor.
*
* @param intentData intent data to copy
*/
public IntentData(IntentData intentData) {
checkNotNull(intentData);
intent = intentData.intent;
state = intentData.state;
request = intentData.request;
version = intentData.version;
origin = intentData.origin;
installables = intentData.installables;
errorCount = intentData.errorCount;
}
/**
* Create a new instance based on the original instance with new installables.
*
* @param original original data
* @param installables new installable intents to set
*/
public IntentData(IntentData original, List installables) {
this(original);
this.installables = ImmutableList.copyOf(checkNotNull(installables));
}
// kryo constructor
protected IntentData() {
intent = null;
request = null;
}
/**
* Returns the intent this metadata references.
*
* @return intent
*/
public Intent intent() {
return intent;
}
/**
* Returns the state of the intent.
*
* @return intent state
*/
public IntentState state() {
return state;
}
public IntentState request() {
return request;
}
/**
* Returns the intent key.
*
* @return intent key
*/
public Key key() {
return intent.key();
}
/**
* Returns the version of the intent for this key.
*
* @return intent version
*/
public Timestamp version() {
return version;
}
/**
* Returns the origin node that created this intent.
*
* @return origin node ID
*/
public NodeId origin() {
return origin;
}
/**
* Updates the state of the intent to the given new state.
*
* @param newState new state of the intent
*/
public void setState(IntentState newState) {
this.state = newState;
}
/**
* Increments the error count for this intent.
*/
public void incrementErrorCount() {
errorCount++;
}
/**
* Sets the error count for this intent.
*
* @param newCount new count
*/
public void setErrorCount(int newCount) {
errorCount = newCount;
}
/**
* Returns the number of times that this intent has encountered an error
* during installation or withdrawal.
*
* @return error count
*/
public int errorCount() {
return errorCount;
}
/**
* Returns the installables associated with this intent.
*
* @return list of installable intents
*/
public List installables() {
return installables != null ? installables : Collections.emptyList();
}
/**
* Determines whether an intent data update is allowed. The update must
* either have a higher version than the current data, or the state
* transition between two updates of the same version must be sane.
*
* @param currentData existing intent data in the store
* @param newData new intent data update proposal
* @return true if we can apply the update, otherwise false
*/
public static boolean isUpdateAcceptable(IntentData currentData, IntentData newData) {
if (currentData == null) {
return true;
} else if (currentData.version().isOlderThan(newData.version())) {
return true;
} else if (currentData.version().isNewerThan(newData.version())) {
return false;
}
// current and new data versions are the same
IntentState currentState = currentData.state();
IntentState newState = newData.state();
switch (newState) {
case INSTALLING:
if (currentState == INSTALLING) {
return false;
}
// FALLTHROUGH
case INSTALLED:
if (currentState == INSTALLED) {
return false;
} else if (currentState == WITHDRAWING || currentState == WITHDRAWN
|| currentState == PURGE_REQ) {
log.warn("Invalid state transition from {} to {} for intent {}",
currentState, newState, newData.key());
return false;
}
return true;
case WITHDRAWING:
if (currentState == WITHDRAWING) {
return false;
}
// FALLTHROUGH
case WITHDRAWN:
if (currentState == WITHDRAWN) {
return false;
} else if (currentState == INSTALLING || currentState == INSTALLED
|| currentState == PURGE_REQ) {
log.warn("Invalid state transition from {} to {} for intent {}",
currentState, newState, newData.key());
return false;
}
return true;
case FAILED:
if (currentState == FAILED) {
return false;
}
return true;
case CORRUPT:
if (currentState == CORRUPT) {
return false;
}
return true;
case PURGE_REQ:
// TODO we should enforce that only WITHDRAWN intents can be purged
return true;
case COMPILING:
case RECOMPILING:
case INSTALL_REQ:
case WITHDRAW_REQ:
default:
log.warn("Invalid state {} for intent {}", newState, newData.key());
return false;
}
}
@Override
public int hashCode() {
return Objects.hash(intent, version);
}
@Override
public boolean equals(Object obj) {
if (this == obj) {
return true;
}
if (obj == null || getClass() != obj.getClass()) {
return false;
}
final IntentData other = (IntentData) obj;
return Objects.equals(this.intent, other.intent)
&& Objects.equals(this.version, other.version);
}
@Override
public String toString() {
return MoreObjects.toStringHelper(getClass())
.add("key", key())
.add("state", state())
.add("version", version())
.add("intent", intent())
.add("origin", origin())
.add("installables", installables())
.toString();
}
}
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