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/*
* ============LICENSE_START=======================================================
* ONAP
* ================================================================================
* Copyright (C) 2019-2020 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.drools.testtransaction;
import java.util.EventObject;
import java.util.HashMap;
import java.util.List;
import org.onap.policy.drools.controller.DroolsController;
import org.onap.policy.drools.system.PolicyController;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* TtControllerTask implements the Runnabale interface Carries out the injection of an event into a
* drools session and subsequent query of a counter to ensure that forward progress is occuring.
*/
public class TtControllerTask implements Runnable {
// get an instance of logger
private static final Logger logger = LoggerFactory.getLogger(TtControllerTask.class);
protected final PolicyController controller;
protected volatile boolean alive = true;
protected final Thread thread = makeThread(this);
/**
* Constructs the object.
*
* @param controller controller with which the task is associated
*/
public TtControllerTask(PolicyController controller) {
this.controller = controller;
this.thread.setName("tt-controller-task-" + controller.getName());
this.thread.start();
}
public PolicyController getController() {
return this.controller;
}
public synchronized boolean isAlive() {
return this.alive;
}
/**
* Stops the task.
*/
public synchronized void stop() {
this.alive = false;
this.thread.interrupt();
try {
joinThread(1000);
} catch (final InterruptedException e) {
logger.error("TestTransaction thread threw", e);
this.thread.interrupt();
}
}
public Thread getThread() {
return this.thread;
}
@Override
public void run() {
try {
final List<String> sessions = this.controller.getDrools().getSessionNames();
if (!(this.controller.getDrools().isBrained())) {
this.alive = false;
logger.error("{}: unknown drools controller", this);
return;
}
final DroolsController drools = this.controller.getDrools();
final HashMap<String, Long> fpcs = new HashMap<>();
for (final String session : sessions) {
fpcs.put(session, -1L);
}
while (this.controller.isAlive()
&& !this.controller.isLocked()
&& drools.isBrained()
&& this.alive) {
injectTxIntoSessions(sessions, fpcs, drools);
if (!this.alive) {
return;
}
if (!getCurrentThread().isInterrupted()) {
doSleep(TestTransactionConstants.DEFAULT_TT_TASK_SLEEP);
}
}
} catch (final InterruptedException e) {
logger.info("{}: stopping ...", this, e);
getCurrentThread().interrupt();
} catch (final IllegalArgumentException e) {
logger.error("{}: controller {} has not been enabled for testing", this, this.controller.getName(), e);
} catch (final Exception e) {
logger.error(
"Controller: {} is not testable - TestTransaction caught exception: {} ",
this.controller.getName(),
e.getMessage());
logger.error("TestTransaction thread threw", e);
} finally {
logger.info("Exiting: {}", this);
this.alive = false;
}
}
private void injectTxIntoSessions(
List<String> sessions, HashMap<String, Long> fpcs, DroolsController drools) {
for (final String session : sessions) {
final List<Object> facts =
this.controller
.getDrools()
.factQuery(session, TestTransactionConstants.TT_FPC, TestTransactionConstants.TT_COUNTER, false);
if (facts == null || facts.size() != 1) {
/*
* unexpected something wrong here, can't expect to recover note this exception is
* caught right below at the exit of run()
*/
logger.error(
"Controller: {}, with rules artifact: (group) {}, (artifact) {}, (version) {} "
+ "- FPC query failed after EventObject insertion! ",
this.controller.getName(),
this.controller.getDrools().getGroupId(),
this.controller.getDrools().getArtifactId(),
this.controller.getDrools().getVersion());
break;
}
logger.debug("Facts: {}", facts);
final long fpc = (Long) facts.get(0);
if (fpc != fpcs.get(session)) {
logger.info(
"Controller: {} , session {} - Forward progress successful: {} -> {}",
this.controller.getName(),
session,
fpcs.get(session),
fpc);
} else {
logger.error(
"Controller: {}, session {} - Forward progress failure: {}",
this.controller.getName(),
session,
fpc);
}
fpcs.put(session, fpc);
drools.getContainer().insert(session, new EventObject(TestTransactionConstants.TT_UUID));
}
}
@Override
public String toString() {
final StringBuilder builder = new StringBuilder();
builder.append("TTControllerTask [controller=");
builder.append(this.controller);
builder.append(", alive=");
builder.append(this.alive);
builder.append(", thread=");
builder.append(this.thread.getName());
builder.append("]");
return builder.toString();
}
// these may be overridden by junit tests
protected Thread makeThread(Runnable action) {
return new Thread(action);
}
protected void joinThread(long waitTimeMs) throws InterruptedException {
this.thread.join(waitTimeMs);
}
protected void doSleep(long sleepMs) throws InterruptedException {
Thread.sleep(sleepMs);
}
protected Thread getCurrentThread() {
return Thread.currentThread();
}
}
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