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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.startstop;
import java.util.Arrays;
import java.util.Properties;
import org.onap.policy.common.endpoints.event.comm.TopicEndpoint;
import org.onap.policy.common.endpoints.event.comm.TopicSource;
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.MessageTypeDispatcher;
import org.onap.policy.common.parameters.ParameterService;
import org.onap.policy.common.utils.services.ServiceManagerContainer;
import org.onap.policy.models.pdp.concepts.PdpStatus;
import org.onap.policy.models.pdp.concepts.PdpUpdate;
import org.onap.policy.models.pdp.enums.PdpMessageType;
import org.onap.policy.models.pdp.enums.PdpState;
import org.onap.policy.pdpx.main.PolicyXacmlPdpRuntimeException;
import org.onap.policy.pdpx.main.comm.XacmlPdpMessage;
import org.onap.policy.pdpx.main.comm.XacmlPdpPapRegistration;
import org.onap.policy.pdpx.main.comm.listeners.XacmlPdpStateChangeListener;
import org.onap.policy.pdpx.main.comm.listeners.XacmlPdpUpdateListener;
import org.onap.policy.pdpx.main.parameters.XacmlPdpParameterGroup;
import org.onap.policy.pdpx.main.rest.XacmlPdpRestServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* This class wraps a distributor so that it can be activated as a complete service together with
* all its xacml pdp and forwarding handlers.
*/
public class XacmlPdpActivator extends ServiceManagerContainer {
// The logger for this class
private static final Logger LOGGER = LoggerFactory.getLogger(XacmlPdpActivator.class);
private static final String[] MSG_TYPE_NAMES = {"messageName"};
private static final String TOPIC = "POLICY-PDP-PAP";
// The parameters of this policy xacml pdp activator
private final XacmlPdpParameterGroup xacmlPdpParameterGroup;
/**
* The XACML PDP REST API server.
*/
private XacmlPdpRestServer restServer;
/**
* Listens for messages on the topic, decodes them into a {@link PdpStatus} message, and then
* dispatches them to appropriate listener.
*/
private final MessageTypeDispatcher msgDispatcher;
/**
* Listens for {@link PdpStateChange} messages from the PAP.
*/
private final XacmlPdpStateChangeListener pdpStateChangeListener;
/**
* Listens for {@link PdpUpdate} messages from the PAP.
*/
private final XacmlPdpUpdateListener pdpUpdateListener;
/**
* The current activator.
*/
private static XacmlPdpActivator current = null;
private volatile boolean alive = false;
private XacmlPdpPapRegistration register;
private XacmlPdpMessage message;
/**
* Instantiate the activator for policy xacml pdp as a complete service.
*
* @param xacmlPdpParameterGroup the parameters for the xacml pdp service
* @param topicProperties properties used to configure the topics
*/
public XacmlPdpActivator(final XacmlPdpParameterGroup xacmlPdpParameterGroup, Properties topicProperties) {
LOGGER.info("Activator initializing using {} and {}", xacmlPdpParameterGroup, topicProperties);
TopicEndpoint.manager.addTopicSinks(topicProperties);
TopicEndpoint.manager.addTopicSources(topicProperties);
try {
final TopicSinkClient sinkClient = new TopicSinkClient(TOPIC);
this.message = new XacmlPdpMessage();
this.xacmlPdpParameterGroup = xacmlPdpParameterGroup;
this.msgDispatcher = new MessageTypeDispatcher(MSG_TYPE_NAMES);
this.pdpStateChangeListener = new XacmlPdpStateChangeListener(sinkClient, message);
this.pdpUpdateListener = new XacmlPdpUpdateListener(sinkClient, message);
this.register = new XacmlPdpPapRegistration(sinkClient);
} catch (RuntimeException | TopicSinkClientException e) {
throw new PolicyXacmlPdpRuntimeException(e.getMessage(), e);
}
xacmlPdpParameterGroup.getRestServerParameters().setName(xacmlPdpParameterGroup.getName());
// @formatter:off
addAction("XACML PDP parameters", () -> ParameterService.register(xacmlPdpParameterGroup),
() -> ParameterService.deregister(xacmlPdpParameterGroup.getName()));
addAction("PdpStateChange Dispatcher",
() -> msgDispatcher.register(PdpMessageType.PDP_STATE_CHANGE.name(), this.pdpStateChangeListener),
() -> msgDispatcher.unregister(PdpMessageType.PDP_STATE_CHANGE.name()));
addAction("PdpUpdate Dispatcher",
() -> msgDispatcher.register(PdpMessageType.PDP_UPDATE.name(), this.pdpUpdateListener),
() -> msgDispatcher.unregister(PdpMessageType.PDP_UPDATE.name()));
addAction("Message Dispatcher",
() -> registerMsgDispatcher(),
() -> unregisterMsgDispatcher());
addAction("topics",
() -> TopicEndpoint.manager.start(),
() -> TopicEndpoint.manager.shutdown());
addAction("Create REST server",
() -> {
restServer = new XacmlPdpRestServer(xacmlPdpParameterGroup.getRestServerParameters(),
xacmlPdpParameterGroup.getApplicationPath());
},
() -> {
restServer = null;
});
addAction("REST server",
() -> restServer.start(),
() -> restServer.stop());
addAction("set alive", () -> setAlive(true), () -> setAlive(false));
addAction("Initial Registration with PAP",
() -> {
register.pdpRegistration(message.formatInitialStatusMessage(PdpState.PASSIVE));
},
() -> {
register.pdpRegistration(message.formatInitialStatusMessage(PdpState.TERMINATED));
});
// @formatter:on
current = this;
}
/**
* Get the parameters used by the activator.
*
* @return the parameters of the activator
*/
public XacmlPdpParameterGroup getParameterGroup() {
return xacmlPdpParameterGroup;
}
/**
* Method to register the parameters to Common Parameter Service.
*
* @param xacmlPdpParameterGroup the xacml pdp parameter group
*/
public void registerToParameterService(final XacmlPdpParameterGroup xacmlPdpParameterGroup) {
ParameterService.register(xacmlPdpParameterGroup);
}
/**
* Method to deregister the parameters from Common Parameter Service.
*
* @param xacmlPdpParameterGroup the xacml pdp parameter group
*/
public void deregisterToParameterService(final XacmlPdpParameterGroup xacmlPdpParameterGroup) {
ParameterService.deregister(xacmlPdpParameterGroup.getName());
}
/**
* Registers the dispatcher with the topic source(s).
*/
private void registerMsgDispatcher() {
for (TopicSource source : TopicEndpoint.manager.getTopicSources(Arrays.asList(TOPIC))) {
source.register(msgDispatcher);
}
}
/**
* Unregisters the dispatcher from the topic source(s).
*/
private void unregisterMsgDispatcher() {
for (TopicSource source : TopicEndpoint.manager.getTopicSources(Arrays.asList(TOPIC))) {
source.unregister(msgDispatcher);
}
}
/**
* Returns the alive status of xacml pdp service.
*
* @return the alive
*/
@Override
public boolean isAlive() {
return alive;
}
/**
* Change the alive status of xacml pdp service.
*
* @param status the status
*/
private void setAlive(final boolean status) {
alive = status;
}
public static XacmlPdpActivator getCurrent() {
return current;
}
public static void setCurrent(XacmlPdpActivator current) {
XacmlPdpActivator.current = current;
}
}
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