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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2019-2020 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.
*
* SPDX-License-Identifier: Apache-2.0
* ============LICENSE_END=========================================================
*/
package org.onap.policy.pdpx.main.comm;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.Set;
import org.onap.policy.common.endpoints.event.comm.client.TopicSinkClient;
import org.onap.policy.models.pdp.concepts.PdpStatus;
import org.onap.policy.models.pdp.concepts.PdpUpdate;
import org.onap.policy.models.tosca.authorative.concepts.ToscaPolicy;
import org.onap.policy.pdp.xacml.application.common.XacmlApplicationException;
import org.onap.policy.pdp.xacml.application.common.XacmlPolicyUtils;
import org.onap.policy.pdpx.main.XacmlState;
import org.onap.policy.pdpx.main.rest.XacmlPdpApplicationManager;
import org.onap.policy.pdpx.main.rest.XacmlPdpStatisticsManager;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class XacmlPdpUpdatePublisher {
private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpUpdatePublisher.class);
private final TopicSinkClient client;
private final XacmlState state;
private final XacmlPdpApplicationManager appManager;
/**
* Constructs the object.
* @param client messages are published to this client
* @param state tracks the state of this PDP
* @param appManager application manager
*/
public XacmlPdpUpdatePublisher(TopicSinkClient client, XacmlState state, XacmlPdpApplicationManager appManager) {
this.client = client;
this.state = state;
this.appManager = appManager;
}
/**
* Handle the PDP Update message.
*
* @param message Incoming message
*/
public synchronized void handlePdpUpdate(PdpUpdate message) {
Set<ToscaPolicy> incomingPolicies =
new HashSet<>(message.getPolicies() == null ? Collections.emptyList() : message.getPolicies());
Set<ToscaPolicy> deployedPolicies =
new HashSet<>(appManager.getToscaPolicies().keySet());
// Undeploy a policy
// if incoming policies do not contain the deployed policy then remove it from PDP
for (ToscaPolicy policy : deployedPolicies) {
if (!incomingPolicies.contains(policy)) {
appManager.removeUndeployedPolicy(policy);
}
}
StringBuilder errorMessage = new StringBuilder();
// Deploy a policy
// if deployed policies do not contain the incoming policy load it
for (ToscaPolicy policy : incomingPolicies) {
if (!deployedPolicies.contains(policy)) {
try {
appManager.loadDeployedPolicy(policy);
} catch (XacmlApplicationException e) {
// Failed to load policy, return error(s) to PAP
LOGGER.error("Failed to load policy: {}", policy, e);
errorMessage.append("Failed to load policy: " + policy + ": "
+ e.getMessage() + XacmlPolicyUtils.LINE_SEPARATOR);
}
}
}
// Return current deployed policies
message.setPolicies(new ArrayList<>(appManager.getToscaPolicies().keySet()));
LOGGER.debug("Returning current deployed policies: {} ", message.getPolicies());
// update the policy count statistic
XacmlPdpStatisticsManager stats = XacmlPdpStatisticsManager.getCurrent();
if (stats != null) {
stats.setTotalPolicyCount(appManager.getPolicyCount());
}
sendPdpUpdate(state.updateInternalState(message, errorMessage.toString()));
}
private void sendPdpUpdate(PdpStatus status) {
// Send PdpStatus Change to PAP
if (!client.send(status)) {
LOGGER.error("failed to send to topic sink {}", client.getTopic());
}
}
}
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