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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdpx.main.comm.listeners;
import org.onap.policy.common.endpoints.event.comm.Topic.CommInfrastructure;
import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClient;
import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClientException;
import org.onap.policy.common.endpoints.listeners.ScoListener;
import org.onap.policy.common.utils.coder.StandardCoderObject;
import org.onap.policy.models.pdp.concepts.PdpStateChange;
import org.onap.policy.models.pdp.concepts.PdpStatus;
import org.onap.policy.pdpx.main.XacmlState;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class XacmlPdpStateChangeListener extends ScoListener<PdpStateChange> {
private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpStateChangeListener.class);
private final TopicSinkClient client;
private final XacmlState state;
/**
* Constructs the object.
*
* @param client used to send back response after receiving state change message
* @param state tracks the state of this PDP
*/
public XacmlPdpStateChangeListener(TopicSinkClient client, XacmlState state) {
super(PdpStateChange.class);
this.client = client;
this.state = state;
}
@Override
public void onTopicEvent(CommInfrastructure infra, String topic, StandardCoderObject sco, PdpStateChange message) {
try {
if (!state.shouldHandle(message)) {
LOGGER.debug("PDP State Change message discarded - {}", message);
return;
}
LOGGER.info("PDP State Change message has been received from the PAP - {}", message);
PdpStatus newStatus = state.updateInternalState(message);
// Send State Change Status to PAP
if (!client.send(newStatus)) {
LOGGER.error("failed to send to topic sink {}", client.getTopic());
throw new TopicSinkClientException("failed to send to topic sink " + client.getTopic());
}
} catch (final Exception e) {
LOGGER.error("failed to handle the PDP State Change message.", e);
}
}
}
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