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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. All rights reserved.
* Modifications Copyright (C) 2019 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.service.engine.event.impl.eventrequestor;
import java.util.EnumMap;
import java.util.Map;
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.ApexEventProducer;
import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
import org.onap.policy.apex.service.engine.event.PeeredReference;
import org.onap.policy.apex.service.engine.event.SynchronousEventCache;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerPeeredMode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Concrete implementation of an Apex event producer that sends one or more events to its peered event requestor
* consumer.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*
*/
public class EventRequestorProducer implements ApexEventProducer {
private static final Logger LOGGER = LoggerFactory.getLogger(EventRequestorProducer.class);
// The name for this producer
private String name = null;
// The peer references for this event handler
private final Map<EventHandlerPeeredMode, PeeredReference> peerReferenceMap =
new EnumMap<>(EventHandlerPeeredMode.class);
// 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 producer Properties
if (!(producerParameters
.getCarrierTechnologyParameters() instanceof EventRequestorCarrierTechnologyParameters)) {
final String errorMessage =
"specified consumer properties are not applicable to event requestor producer (" + this.name + ")";
LOGGER.warn(errorMessage);
throw new ApexEventException(errorMessage);
}
// Check if we are in peered mode
if (!producerParameters.isPeeredMode(EventHandlerPeeredMode.REQUESTOR)) {
final String errorMessage = "Event Requestor producer (" + this.name
+ ") must run in peered requestor mode with a Event Requestor consumer";
LOGGER.warn(errorMessage);
throw new ApexEventException(errorMessage);
}
}
/**
* {@inheritDoc}.
*/
@Override
public String getName() {
return name;
}
/**
* Get the number of events sent to date.
*
* @return the number of events received
*/
public int getEventsSent() {
return eventsSent;
}
/**
* {@inheritDoc}.
*/
@Override
public PeeredReference getPeeredReference(final EventHandlerPeeredMode peeredMode) {
return peerReferenceMap.get(peeredMode);
}
/**
* {@inheritDoc}.
*/
@Override
public void setPeeredReference(final EventHandlerPeeredMode peeredMode, final PeeredReference peeredReference) {
peerReferenceMap.put(peeredMode, peeredReference);
}
/**
* {@inheritDoc}.
*/
@Override
public void sendEvent(final long executionId, final Properties executorProperties, final String eventName,
final Object eventObject) {
// Check if this is a synchronized event, if so we have received a reply
final SynchronousEventCache synchronousEventCache =
(SynchronousEventCache) peerReferenceMap.get(EventHandlerPeeredMode.SYNCHRONOUS);
if (synchronousEventCache != null) {
synchronousEventCache.removeCachedEventToApexIfExists(executionId);
}
// Find the peered consumer for this producer
final PeeredReference peeredRequestorReference = peerReferenceMap.get(EventHandlerPeeredMode.REQUESTOR);
if (peeredRequestorReference != null) {
// Find the event Response Consumer that will handle this request
final ApexEventConsumer consumer = peeredRequestorReference.getPeeredConsumer();
if (!(consumer instanceof EventRequestorConsumer)) {
final String errorMessage = "send of event to event consumer \""
+ peeredRequestorReference.getPeeredConsumer() + "\" failed,"
+ " event response consumer is not an instance of EventRequestorConsumer\n" + eventObject;
LOGGER.warn(errorMessage);
throw new ApexEventRuntimeException(errorMessage);
}
// Use the consumer to handle this event
final EventRequestorConsumer eventRequstConsumer = (EventRequestorConsumer) consumer;
eventRequstConsumer.processEvent(eventObject);
eventsSent++;
} else {
// No peered consumer defined
final String errorMessage = "send of event failed, event response consumer is not defined\n" + eventObject;
LOGGER.warn(errorMessage);
throw new ApexEventRuntimeException(errorMessage);
}
}
/**
* {@inheritDoc}.
*/
@Override
public void stop() {
// For event requestor, all the implementation is in the consumer
}
}
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