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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2020 AT&T Intellectual Property. All rights reserved.
* ================================================================================
* 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.controlloop.actorserviceprovider.impl;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.function.Function;
import org.onap.policy.common.parameters.BeanValidationResult;
import org.onap.policy.controlloop.actorserviceprovider.Operator;
import org.onap.policy.controlloop.actorserviceprovider.Util;
import org.onap.policy.controlloop.actorserviceprovider.parameters.ParameterValidationRuntimeException;
import org.onap.policy.controlloop.actorserviceprovider.spi.Actor;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Implementation of an actor.
*/
public class ActorImpl extends StartConfigPartial<Map<String, Object>> implements Actor {
private static final Logger logger = LoggerFactory.getLogger(ActorImpl.class);
/**
* Maps a name to an operator.
*/
private final Map<String, Operator> name2operator = new ConcurrentHashMap<>();
/**
* Constructs the object.
*
* @param name actor name
*/
public ActorImpl(String name) {
super(name);
}
/**
* Adds an operator supported by this actor.
*
* @param operator operation to be added
*/
protected synchronized void addOperator(Operator operator) {
/*
* This method is "synchronized" to prevent the state from changing while the
* operator is added. The map, itself, does not need synchronization as it's a
* concurrent map.
*/
if (isConfigured()) {
throw new IllegalStateException("attempt to set operators on a configured actor: " + getName());
}
name2operator.compute(operator.getName(), (opName, existingOp) -> {
if (existingOp == null) {
return operator;
}
logger.warn("duplicate names for actor operation {}.{}: {}, ignoring {}", getName(), opName,
existingOp.getClass().getSimpleName(), operator.getClass().getSimpleName());
return existingOp;
});
}
@Override
public String getName() {
return getFullName();
}
@Override
public Operator getOperator(String name) {
Operator operator = name2operator.get(name);
if (operator == null) {
throw new IllegalArgumentException("unknown operator " + getName() + "." + name);
}
return operator;
}
@Override
public Collection<Operator> getOperators() {
return name2operator.values();
}
@Override
public Set<String> getOperationNames() {
return name2operator.keySet();
}
/**
* For each operation, it looks for a set of parameters by the same name and, if
* found, configures the operation with the parameters.
*/
@Override
protected void doConfigure(Map<String, Object> parameters) {
final String actorName = getName();
logger.info("configuring operations for actor {}", actorName);
BeanValidationResult valres = new BeanValidationResult(actorName, parameters);
// function that creates operator-specific parameters, given the operation name
Function<String, Map<String, Object>> opParamsMaker = makeOperatorParameters(parameters);
for (Operator operator : name2operator.values()) {
String operName = operator.getName();
Map<String, Object> subparams = opParamsMaker.apply(operName);
if (subparams != null) {
try {
operator.configure(subparams);
} catch (ParameterValidationRuntimeException e) {
logger.warn("failed to configure operation {}.{}", actorName, operName, e);
valres.addResult(e.getResult());
} catch (RuntimeException e) {
logger.warn("failed to configure operation {}.{}", actorName, operName, e);
}
} else if (operator.isConfigured()) {
logger.warn("missing configuration parameters for operation {}.{}; using previous parameters",
actorName, operName);
} else {
logger.warn("missing configuration parameters for operation {}.{}; operation cannot be started",
actorName, operName);
}
}
}
/**
* Extracts the operator parameters from the actor parameters, for a given operator.
* This method assumes each operation has its own set of parameters.
*
* @param actorParameters actor parameters
* @return a function to extract the operator parameters from the actor parameters.
* Note: this function may return {@code null} if there are no parameters for
* the given operation name
*/
protected Function<String, Map<String, Object>> makeOperatorParameters(Map<String, Object> actorParameters) {
return operName -> Util.translateToMap(getName() + "." + operName, actorParameters.get(operName));
}
/**
* Starts each operation.
*/
@Override
protected void doStart() {
final String actorName = getName();
logger.info("starting operations for actor {}", actorName);
for (Operator oper : name2operator.values()) {
if (oper.isConfigured()) {
Util.runFunction(oper::start, "failed to start operation {}.{}", actorName, oper.getName());
} else {
logger.warn("not starting unconfigured operation {}.{}", actorName, oper.getName());
}
}
}
/**
* Stops each operation.
*/
@Override
protected void doStop() {
final String actorName = getName();
logger.info("stopping operations for actor {}", actorName);
// @formatter:off
name2operator.values().forEach(
oper -> Util.runFunction(oper::stop, "failed to stop operation {}.{}", actorName, oper.getName()));
// @formatter:on
}
/**
* Shuts down each operation.
*/
@Override
protected void doShutdown() {
final String actorName = getName();
logger.info("shutting down operations for actor {}", actorName);
// @formatter:off
name2operator.values().forEach(oper -> Util.runFunction(oper::shutdown,
"failed to shutdown operation {}.{}", actorName, oper.getName()));
// @formatter:on
}
// TODO old code: remove lines down to **HERE**
@Override
public String actor() {
return null;
}
@Override
public List<String> recipes() {
return Collections.emptyList();
}
@Override
public List<String> recipeTargets(String recipe) {
return Collections.emptyList();
}
@Override
public List<String> recipePayloads(String recipe) {
return Collections.emptyList();
}
// **HERE**
}
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