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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.service.executor;
import java.time.Duration;
import java.util.ArrayList;
import java.util.List;
/**
* @author hakonhall
*/
public class TestExecutor implements RunletExecutor {
private List<Thread> threads = new ArrayList<>();
private Runlet runlet;
private CancellableImpl cancellable;
private final Object monitor = new Object();
private boolean afterRun = false;
private boolean waitAfterRun = false;
private int runsCompleted = 0;
private final Runnable cancelExecution = () -> executionRunning = false;
private volatile boolean executionRunning = true;
@Override
public Cancellable scheduleWithFixedDelay(Runlet runlet, Duration delay) {
if (this.runlet != null) {
throw new IllegalStateException("TestExecutor only supports execution of one runlet");
}
this.runlet = runlet;
this.cancellable = new CancellableImpl(runlet);
this.cancellable.setPeriodicExecutionCancellationCallback(cancelExecution);
return this::cancel;
}
private void cancel() {
cancellable.cancel();
}
boolean isExecutionRunning() {
return executionRunning;
}
void runAsync() {
Thread thread = new Thread(this::threadMain);
thread.start();
threads.add(thread);
}
void runToCompletion(int run) {
runAsync();
waitUntilRunCompleted(run);
}
private void threadMain() {
cancellable.run();
synchronized (monitor) {
++runsCompleted;
afterRun = true;
monitor.notifyAll();
while (waitAfterRun) {
monitor.notifyAll();
}
afterRun = false;
}
}
void setWaitAfterRun(boolean waitAfterRun) {
synchronized (monitor) {
this.waitAfterRun = waitAfterRun;
}
}
void waitUntilAfterRun() {
synchronized (monitor) {
while (!afterRun) {
uncheckedWait();
}
}
}
void waitUntilRunCompleted(int run) {
synchronized (monitor) {
while (runsCompleted < run) {
uncheckedWait();
}
}
}
void uncheckedWait() {
try {
monitor.wait();
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
@Override
public void close() {
threads.forEach(thread -> { try { thread.join(); } catch (InterruptedException ignored) {} });
}
}
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