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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.controlloop.eventmanager;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import java.util.Properties;
import lombok.Getter;
import org.onap.policy.common.parameters.ValidationResult;
import org.onap.policy.common.utils.resources.ResourceUtils;
import org.onap.policy.controlloop.actor.guard.GuardActorServiceProvider;
import org.onap.policy.controlloop.actor.guard.GuardConfig;
import org.onap.policy.controlloop.actor.guard.GuardOperation;
import org.onap.policy.controlloop.actor.guard.GuardOperator;
import org.onap.policy.controlloop.actorserviceprovider.ActorService;
import org.onap.policy.controlloop.actorserviceprovider.Util;
import org.onap.policy.controlloop.ophistory.OperationHistoryDataManager;
import org.onap.policy.controlloop.ophistory.OperationHistoryDataManagerImpl;
import org.onap.policy.controlloop.ophistory.OperationHistoryDataManagerParams;
import org.onap.policy.controlloop.ophistory.OperationHistoryDataManagerStub;
import org.onap.policy.controlloop.utils.ControlLoopUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Services used by the ControlLoopEventManager.
*/
@Getter
public class EventManagerServices {
public static final Logger logger = LoggerFactory.getLogger(EventManagerServices.class);
public static final String ACTOR_SERVICE_PROPERTIES = "actor.service";
public static final String DATA_MANAGER_PROPERTIES = "operation.history";
public final ActorService actorService = new ActorService();
// assume we're using a stub until proven otherwise
public final OperationHistoryDataManager dataManager;
/**
* Constructs the object. Configures and starts the actor service. Initializes
* {@link #dataManager}, to a "real" data manager, if guards are enabled.
*
* @param configFileName configuration file name
*/
public EventManagerServices(String configFileName) {
// configure and start actor services
Properties props = startActorService(configFileName);
if (isGuardEnabled()) {
// guards are enabled - use a real data manager
dataManager = makeDataManager(props);
} else {
// guards are disabled - use a stub data manager
dataManager = new OperationHistoryDataManagerStub();
}
}
/**
* Configures and starts the actor service.
*
* @param configFileName configuration file name
* @return the properties that were loaded from the configuration file
*/
public Properties startActorService(String configFileName) {
try (InputStream inpstr = openConfigFile(configFileName)) {
Properties props = new Properties();
props.load(inpstr);
Map<String, Object> parameters = ControlLoopUtils.toObject(props, ACTOR_SERVICE_PROPERTIES);
ControlLoopUtils.compressLists(parameters);
actorService.configure(parameters);
actorService.start();
return props;
} catch (RuntimeException | IOException e) {
logger.error("cannot configure/start actor service");
throw new IllegalStateException(e);
}
}
/**
* Opens the config file.
*
* @param configFileName configuration file name
* @return the file's input stream
* @throws FileNotFoundException if the file cannot be found
*/
private InputStream openConfigFile(String configFileName) throws FileNotFoundException {
InputStream inpstr = ResourceUtils.getResourceAsStream(configFileName);
if (inpstr == null) {
throw new FileNotFoundException(configFileName);
}
return inpstr;
}
/**
* Determines if guards are enabled.
*
* @return {@code true} if guards are enabled, {@code false} otherwise
*/
public boolean isGuardEnabled() {
try {
GuardOperator guard = (GuardOperator) getActorService().getActor(GuardActorServiceProvider.NAME)
.getOperator(GuardOperation.NAME);
if (!guard.isConfigured()) {
logger.warn("cannot check 'disabled' property in GUARD actor - assuming disabled");
return false;
}
GuardConfig config = (GuardConfig) guard.getCurrentConfig();
if (config.isDisabled()) {
logger.warn("guard disabled");
return false;
}
if (!guard.isAlive()) {
logger.warn("guard actor is not running");
return false;
}
return true;
} catch (RuntimeException e) {
logger.warn("cannot check 'disabled' property in GUARD actor - assuming disabled", e);
return false;
}
}
/**
* Makes and starts the data manager.
*
* @param props properties with which to configure the data manager
* @return a new data manager
*/
public OperationHistoryDataManagerImpl makeDataManager(Properties props) {
try {
Map<String, Object> parameters = ControlLoopUtils.toObject(props, DATA_MANAGER_PROPERTIES);
OperationHistoryDataManagerParams params = Util.translate(DATA_MANAGER_PROPERTIES, parameters,
OperationHistoryDataManagerParams.class);
ValidationResult result = params.validate(DATA_MANAGER_PROPERTIES);
if (!result.isValid()) {
throw new IllegalArgumentException("invalid data manager properties:\n" + result.getResult());
}
OperationHistoryDataManagerImpl mgr = new OperationHistoryDataManagerImpl(params);
mgr.start();
return mgr;
} catch (RuntimeException e) {
logger.error("cannot start operation history data manager");
actorService.stop();
throw e;
}
}
}
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