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/*-
* ============LICENSE_START=======================================================
* Copyright (C) 2016-2018 Ericsson. 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.apex.core.deployment;
import java.util.Arrays;
import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This utility class is used to start and stop periodic events on Apex engines over the EngDep protocol.
*/
public class PeriodicEventManager {
// Get a reference to the logger
private static final XLogger LOGGER = XLoggerFactory.getXLogger(BatchDeployer.class);
private static final int NUM_ARGUMENTS = 4;
private static final int PERIODIC_EVENT_INTERVAL = 3;
// The facade that is handling messaging to the engine service
private EngineServiceFacade engineServiceFacade = null;
/**
* The main method, reads the Apex server host address, port and location of the Apex model XML file from the
* command line arguments.
*
* @param args the arguments that specify the Apex engine and the Apex model file
*/
public static void main(final String[] args) {
if (args.length != NUM_ARGUMENTS) {
LOGGER.error("invalid arguments: " + Arrays.toString(args));
LOGGER.error("usage: Deployer <server address> <port address> <start/stop> <periods in ms>");
return;
}
PeriodicEventManager deployer = null;
try {
// Use a Deployer object to handle model deployment
deployer = new PeriodicEventManager(args[0], Integer.parseInt(args[1]));
deployer.init();
if (args[2].equalsIgnoreCase("start")) {
deployer.startPerioidicEvents(Long.parseLong(args[PERIODIC_EVENT_INTERVAL]));
} else {
deployer.stopPerioidicEvents();
}
} catch (final ApexException e) {
LOGGER.error("model deployment failed on parameters {}", args, e);
} finally {
if (deployer != null) {
deployer.close();
}
}
}
/**
* Instantiates a new deployer.
*
* @param hostName the host name of the host running the Apex Engine
* @param port the port to use for EngDep communication with the Apex engine
*/
public PeriodicEventManager(final String hostName, final int port) {
engineServiceFacade = new EngineServiceFacade(hostName, port);
}
/**
* Initializes the deployer, opens an EngDep communication session with the Apex engine.
*
* @throws ApexDeploymentException thrown on deployment and communication errors
*/
public void init() throws ApexDeploymentException {
engineServiceFacade.init();
}
/**
* Close the EngDep connection to the Apex server.
*/
public void close() {
engineServiceFacade.close();
}
/**
* Start the Apex engines on the engine service.
*
* @param period the interval in milliseconds between periodic events
* @throws ApexDeploymentException on messaging errors
*/
public void startPerioidicEvents(final long period) throws ApexDeploymentException {
for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
engineServiceFacade.startPerioidicEvents(engineKey, period);
}
}
/**
* Stop the Apex engines on the engine service.
*
* @throws ApexDeploymentException on messaging errors
*/
public void stopPerioidicEvents() throws ApexDeploymentException {
for (final AxArtifactKey engineKey : engineServiceFacade.getEngineKeyArray()) {
engineServiceFacade.stopPerioidicEvents(engineKey);
}
}
}
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