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/*-
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2017-2019 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.
* ============LICENSE_END=========================================================
*/
package org.onap.policy.drools.system;
import java.util.Properties;
import org.onap.policy.common.endpoints.event.comm.TopicEndpoint;
import org.onap.policy.drools.persistence.SystemPersistence;
import org.onap.policy.drools.properties.DroolsProperties;
import org.onap.policy.drools.utils.PropertyUtil;
import org.onap.policy.drools.utils.logging.LoggerUtil;
import org.onap.policy.drools.utils.logging.MDCTransaction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Programmatic entry point to the management layer.
*/
public class Main {
/** constructor (hides public default one). */
private Main() {}
/**
* main.
*
* @param args program arguments.
*/
public static void main(String[] args) {
/* start logger */
Logger logger = LoggerFactory.getLogger(Main.class);
/* system properties */
for (Properties systemProperties : SystemPersistence.manager.getSystemProperties()) {
PropertyUtil.setSystemProperties(systemProperties);
}
/* 0. boot */
PolicyEngine.manager.boot(args);
/* 1.a. Configure Engine */
Properties engineProperties;
try {
engineProperties = SystemPersistence.manager.getEngineProperties();
} catch (IllegalArgumentException iae) {
logger.warn("Main: engine properties not found. Using default configuration.", iae);
engineProperties = PolicyEngine.manager.defaultTelemetryConfig();
}
PolicyEngine.manager.configure(engineProperties);
/* 1.b. Load Installation Environment(s) */
for (Properties env : SystemPersistence.manager.getEnvironmentProperties()) {
PolicyEngine.manager.setEnvironment(env);
}
/* 2. Add topics */
for (Properties topicProperties : SystemPersistence.manager.getTopicProperties()) {
TopicEndpoint.manager.addTopics(topicProperties);
}
/* 3. Start the Engine with the basic services only (no Policy Controllers) */
MDCTransaction trans =
MDCTransaction.newTransaction(null, null)
.setServiceName(Main.class.getSimpleName())
.setTargetEntity("engine")
.setTargetServiceName("start");
try {
final boolean success = PolicyEngine.manager.start();
if (!success) {
trans.setStatusCode(false).setResponseDescription("partial start").flush();
logger.warn(
LoggerUtil.TRANSACTION_LOG_MARKER,
"Main: {} has been partially started",
PolicyEngine.manager);
} else {
trans.setStatusCode(true).transaction();
}
} catch (final IllegalStateException e) {
trans
.setStatusCode(false)
.setResponseCode(e.getClass().getSimpleName())
.setResponseDescription(e.getMessage())
.flush();
logger.warn(
LoggerUtil.TRANSACTION_LOG_MARKER,
"Main: cannot start {} (bad state) because of {}",
PolicyEngine.manager,
e.getMessage(),
e);
} catch (final Exception e) {
trans
.setStatusCode(false)
.setResponseCode(e.getClass().getSimpleName())
.setResponseDescription(e.getMessage())
.flush();
logger.warn(
LoggerUtil.TRANSACTION_LOG_MARKER,
"Main: cannot start {} because of {}",
PolicyEngine.manager,
e.getMessage(),
e);
System.exit(1);
}
/* 4. Create and start the controllers */
for (final Properties controllerProperties :
SystemPersistence.manager.getControllerProperties()) {
final String controllerName =
controllerProperties.getProperty(DroolsProperties.PROPERTY_CONTROLLER_NAME);
try {
trans =
MDCTransaction.newTransaction(null, null)
.setServiceName(Main.class.getSimpleName())
.setTargetEntity("controller:" + controllerName)
.setTargetServiceName("start");
final PolicyController controller =
PolicyEngine.manager.createPolicyController(controllerName, controllerProperties);
controller.start();
trans
.setStatusCode(true)
.setResponseDescription(controller.getDrools().getCanonicalSessionNames().toString())
.transaction();
} catch (final Exception e) {
trans
.setStatusCode(false)
.setResponseCode(e.getClass().getSimpleName())
.setResponseDescription(e.getMessage())
.flush();
logger.error(
LoggerUtil.TRANSACTION_LOG_MARKER,
"Main: cannot instantiate policy-controller {} because of {}",
controllerName,
e.getMessage(),
e);
} catch (final LinkageError e) {
trans
.setStatusCode(false)
.setResponseCode(e.getClass().getSimpleName())
.setResponseDescription(e.getMessage())
.flush();
logger.warn(
LoggerUtil.TRANSACTION_LOG_MARKER,
"Main: cannot instantiate policy-controller {} (linkage) because of {}",
controllerName,
e.getMessage(),
e);
}
}
}
}
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