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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.service.engine.main;
import java.util.Arrays;
import java.util.Base64;
import java.util.Map.Entry;
import org.onap.policy.apex.model.basicmodel.concepts.ApexException;
import org.onap.policy.apex.service.parameters.ApexParameterHandler;
import org.onap.policy.apex.service.parameters.ApexParameters;
import org.onap.policy.apex.service.parameters.eventhandler.EventHandlerParameters;
import org.slf4j.ext.XLogger;
import org.slf4j.ext.XLoggerFactory;
/**
* This class initiates Apex as a complete service from the command line.
*
* @author Liam Fallon (liam.fallon@ericsson.com)
*/
public class ApexMain {
private static final XLogger LOGGER = XLoggerFactory.getXLogger(ApexMain.class);
// The Apex Activator that activates the Apex engine
private ApexActivator activator;
// The parameters read in from JSON
private ApexParameters parameters;
/**
* Instantiates the Apex service.
*
* @param args the commaind line arguments
*/
public ApexMain(final String[] args) {
LOGGER.entry("Starting Apex service with parameters " + Arrays.toString(args) + " . . .");
// Check the arguments
final ApexCommandLineArguments arguments = new ApexCommandLineArguments();
try {
// The arguments return a string if there is a message to print and we should exit
final String argumentMessage = arguments.parse(args);
if (argumentMessage != null) {
LOGGER.info(argumentMessage);
return;
}
// Validate that the arguments are sane
arguments.validate();
} catch (final ApexException e) {
LOGGER.error("start of Apex service failed", e);
return;
}
// Read the parameters
try {
parameters = new ApexParameterHandler().getParameters(arguments);
} catch (final Exception e) {
LOGGER.error("start of Apex service failed", e);
return;
}
// Set incoming Java properties
setJavaProperties(parameters);
// Set the name of the event handler parameters for producers and consumers
for (final Entry<String, EventHandlerParameters> ehParameterEntry : parameters.getEventOutputParameters()
.entrySet()) {
if (!ehParameterEntry.getValue().checkSetName()) {
ehParameterEntry.getValue().setName(ehParameterEntry.getKey());
}
}
for (final Entry<String, EventHandlerParameters> ehParameterEntry : parameters.getEventInputParameters()
.entrySet()) {
if (!ehParameterEntry.getValue().checkSetName()) {
ehParameterEntry.getValue().setName(ehParameterEntry.getKey());
}
}
// Now, create the activator for the Apex service
activator = new ApexActivator(parameters);
// Start the activator
try {
activator.initialize();
} catch (final ApexActivatorException e) {
LOGGER.error("start of Apex service failed, used parameters are " + Arrays.toString(args), e);
return;
}
// Add a shutdown hook to shut everything down in an orderly manner
Runtime.getRuntime().addShutdownHook(new ApexMainShutdownHookClass());
LOGGER.exit("Started Apex");
}
/**
* Get the parameters specified in JSON.
*
* @return the parameters
*/
public ApexParameters getParameters() {
return parameters;
}
/**
* Shut down Execution.
*
* @throws ApexException on shutdown errors
*/
public void shutdown() throws ApexException {
if (activator != null) {
activator.terminate();
}
}
/**
* The Class ApexMainShutdownHookClass terminates the Apex engine for the Apex service when its run method is
* called.
*/
private class ApexMainShutdownHookClass extends Thread {
/**
* {@inheritDoc}.
*/
@Override
public void run() {
try {
// Shutdown the Apex engine and wait for everything to stop
activator.terminate();
} catch (final ApexException e) {
LOGGER.warn("error occured during shut down of the Apex service", e);
}
}
}
/**
* Set the Java properties specified in the parameters.
*
* @param parameters The incoming parameters
*/
private void setJavaProperties(final ApexParameters parameters) {
if (!parameters.checkJavaPropertiesSet()) {
return;
}
// Set each Java property
for (String[] javaProperty : parameters.getJavaProperties()) {
String javaPropertyName = javaProperty[0];
String javaPropertyValue = javaProperty[1];
// Passwords are encoded using base64, better than sending passwords in the clear
if (javaPropertyName.toLowerCase().contains("password")) {
javaPropertyValue = new String(Base64.getDecoder().decode(javaPropertyValue.getBytes()));
}
// Set the Java property
System.setProperty(javaPropertyName, javaPropertyValue);
}
}
/**
* The main method.
*
* @param args the arguments
*/
public static void main(final String[] args) {
new ApexMain(args);
}
}
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