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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2019-2020 Nordix 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.apex.plugins.event.carrier.restrequestor;
import java.util.Properties;
import org.onap.policy.apex.service.engine.event.ApexEventConsumer;
import org.onap.policy.apex.service.engine.event.ApexEventException;
import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
import org.onap.policy.apex.service.engine.event.ApexPluginsEventProducer;
import org.onap.policy.apex.service.engine.event.PeeredReference;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
/**
* Concrete implementation of an Apex event requestor that manages the producer side of a REST request.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*
*/
public class ApexRestRequestorProducer extends ApexPluginsEventProducer {
// The number of events sent
private int eventsSent = 0;
/**
* {@inheritDoc}.
*/
@Override
public void init(final String producerName, final EventHandlerParameters producerParameters)
throws ApexEventException {
this.name = producerName;
// Check and get the REST Properties
if (!(producerParameters
.getCarrierTechnologyParameters() instanceof RestRequestorCarrierTechnologyParameters)) {
final String errorMessage =
"specified producer properties are not applicable to REST requestor producer (" + this.name + ")";
throw new ApexEventException(errorMessage);
}
RestRequestorCarrierTechnologyParameters restProducerProperties =
(RestRequestorCarrierTechnologyParameters) producerParameters.getCarrierTechnologyParameters();
// Check if we are in peered mode
if (!producerParameters.isPeeredMode(EventHandlerPeeredMode.REQUESTOR)) {
final String errorMessage = "REST Requestor producer (" + this.name
+ ") must run in peered requestor mode with a REST Requestor consumer";
throw new ApexEventException(errorMessage);
}
// Check if the HTTP URL has been set
if (restProducerProperties.getUrl() != null) {
final String errorMessage = "URL may not be specified on REST Requestor producer (" + this.name + ")";
throw new ApexEventException(errorMessage);
}
// Check if the HTTP method has been set
if (restProducerProperties.getHttpMethod() != null) {
final String errorMessage =
"HTTP method may not be specified on REST Requestor producer (" + this.name + ")";
throw new ApexEventException(errorMessage);
}
}
/**
* Get the number of events sent to date.
*
* @return the number of events received
*/
public int getEventsSent() {
return eventsSent;
}
/**
* {@inheritDoc}.
*/
@Override
public void sendEvent(final long executionId, final Properties executionProperties, final String eventName,
final Object event) {
super.sendEvent(executionId, executionProperties, eventName, event);
// Find the peered consumer for this producer
final PeeredReference peeredRequestorReference = peerReferenceMap.get(EventHandlerPeeredMode.REQUESTOR);
if (peeredRequestorReference != null) {
// Find the REST Response Consumer that will handle this request
final ApexEventConsumer consumer = peeredRequestorReference.getPeeredConsumer();
if (!(consumer instanceof ApexRestRequestorConsumer)) {
final String errorMessage = "send of event failed,"
+ " REST response consumer is not an instance of ApexRestRequestorConsumer\n" + event;
throw new ApexEventRuntimeException(errorMessage);
}
// Use the consumer to handle this event
final ApexRestRequestorConsumer restRequstConsumer = (ApexRestRequestorConsumer) consumer;
restRequstConsumer
.processRestRequest(new ApexRestRequest(executionId, executionProperties, eventName, event));
eventsSent++;
} else {
// No peered consumer defined
final String errorMessage = "send of event failed," + " REST response consumer is not defined\n" + event;
throw new ApexEventRuntimeException(errorMessage);
}
}
/**
* {@inheritDoc}.
*/
@Override
public void stop() {
// For REST requestor, all the implementation is in the consumer
}
}
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