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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.actor.appc;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.concurrent.CompletableFuture;
import org.onap.policy.appc.CommonHeader;
import org.onap.policy.appc.Request;
import org.onap.policy.appc.Response;
import org.onap.policy.appc.ResponseCode;
import org.onap.policy.common.utils.coder.Coder;
import org.onap.policy.common.utils.coder.CoderException;
import org.onap.policy.common.utils.coder.StandardCoder;
import org.onap.policy.common.utils.coder.StandardCoderInstantAsMillis;
import org.onap.policy.controlloop.actorserviceprovider.OperationOutcome;
import org.onap.policy.controlloop.actorserviceprovider.OperationResult;
import org.onap.policy.controlloop.actorserviceprovider.impl.BidirectionalTopicOperation;
import org.onap.policy.controlloop.actorserviceprovider.parameters.BidirectionalTopicConfig;
import org.onap.policy.controlloop.actorserviceprovider.parameters.ControlLoopOperationParams;
import org.onap.policy.controlloop.actorserviceprovider.topic.SelectorKey;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Superclass for APPC Operations.
*/
public abstract class AppcOperation extends BidirectionalTopicOperation<Request, Response> {
private static final Logger logger = LoggerFactory.getLogger(AppcOperation.class);
private static final StandardCoder coder = new StandardCoderInstantAsMillis();
public static final String VNF_ID_KEY = "generic-vnf.vnf-id";
/**
* Keys used to match the response with the request listener. The sub request ID is a
* UUID, so it can be used to uniquely identify the response.
* <p/>
* Note: if these change, then {@link #getExpectedKeyValues(int, Request)} must be
* updated accordingly.
*/
public static final List<SelectorKey> SELECTOR_KEYS = List.of(new SelectorKey("CommonHeader", "SubRequestID"));
/**
* Constructs the object.
*
* @param params operation parameters
* @param config configuration for this operation
* @param propertyNames names of properties required by this operation
*/
public AppcOperation(ControlLoopOperationParams params, BidirectionalTopicConfig config,
List<String> propertyNames) {
super(params, config, Response.class, propertyNames);
}
/**
* Starts the GUARD.
*/
@Override
protected CompletableFuture<OperationOutcome> startPreprocessorAsync() {
return startGuardAsync();
}
/**
* Makes a request, given the target VNF. This is a support function for
* {@link #makeRequest(int)}.
*
* @param attempt attempt number
* @param targetVnf target VNF
* @return a new request
*/
protected Request makeRequest(int attempt, String targetVnf) {
Request request = new Request();
request.setCommonHeader(new CommonHeader());
request.getCommonHeader().setRequestId(params.getRequestId());
request.getCommonHeader().setSubRequestId(getSubRequestId());
request.setAction(getName());
// convert payload strings to objects
if (params.getPayload() == null) {
logger.info("{}: no payload specified for {}", getFullName(), params.getRequestId());
} else {
convertPayload(params.getPayload(), request.getPayload());
}
// add/replace specific values
request.getPayload().put(VNF_ID_KEY, targetVnf);
return request;
}
/**
* Converts a payload. The original value is assumed to be a JSON string, which is
* decoded into an object.
*
* @param source source from which to get the values
* @param target where to place the decoded values
*/
private static void convertPayload(Map<String, Object> source, Map<String, Object> target) {
for (Entry<String, Object> ent : source.entrySet()) {
Object value = ent.getValue();
if (value == null) {
target.put(ent.getKey(), null);
continue;
}
try {
target.put(ent.getKey(), coder.decode(value.toString(), Object.class));
} catch (CoderException e) {
logger.warn("cannot decode JSON value {}: {}", ent.getKey(), ent.getValue(), e);
}
}
}
/**
* Note: these values must match {@link #SELECTOR_KEYS}.
*/
@Override
protected List<String> getExpectedKeyValues(int attempt, Request request) {
return List.of(getSubRequestId());
}
@Override
protected Status detmStatus(String rawResponse, Response response) {
if (response.getStatus() == null) {
// no status - this must be a request, not a response - just ignore it
logger.info("{}: ignoring request message for {}", getFullName(), params.getRequestId());
return Status.STILL_WAITING;
}
ResponseCode code = ResponseCode.toResponseCode(response.getStatus().getCode());
if (code == null) {
throw new IllegalArgumentException(
"unknown APPC-C response status code: " + response.getStatus().getCode());
}
switch (code) {
case SUCCESS:
return Status.SUCCESS;
case FAILURE:
return Status.FAILURE;
case ERROR:
case REJECT:
throw new IllegalArgumentException("APP-C request was not accepted, code=" + code);
case ACCEPT:
default:
// awaiting a "final" response
return Status.STILL_WAITING;
}
}
/**
* Sets the message to the status description, if available.
*/
@Override
public OperationOutcome setOutcome(OperationOutcome outcome, OperationResult result, Response response) {
outcome.setResponse(response);
if (response.getStatus() == null || response.getStatus().getDescription() == null) {
return setOutcome(outcome, result);
}
outcome.setResult(result);
outcome.setMessage(response.getStatus().getDescription());
return outcome;
}
@Override
protected Coder getCoder() {
return coder;
}
}
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