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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.clustercontroller.core.testutils;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vespa.clustercontroller.core.ClusterStateBundle;
import com.yahoo.vespa.clustercontroller.core.FakeTimer;
import com.yahoo.vespa.clustercontroller.core.listeners.SystemStateListener;
import java.time.Duration;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Old class used for waiting for something..
* Deprecated.. Use the Waiter class instead
*/
public class StateWaiter implements SystemStateListener {
private final FakeTimer timer;
protected ClusterState current;
public StateWaiter(FakeTimer timer) {
this.timer = timer;
}
@Override
public void handleNewPublishedState(ClusterStateBundle state) {
synchronized(timer) {
current = state.getBaselineClusterState();
timer.notifyAll();
}
}
@Override
public void handleNewCandidateState(ClusterStateBundle states) {
// Treat candidate states as if they were published for the tests that use
// this (deprecated) waiter class.
//
// Since the tests using StateWaiter expects to observe _both_ versioned and
// unversioned (candidate) states, we ignore candidate states iff they are
// equal to the versioned state we have already observed. Otherwise, tests
// waiting for a _versioned_ state risk never observing the version number
// itself (only a candidate following it) and hang until they time out.
synchronized (timer) {
if (current != null) {
ClusterState versionPatchedState = states.getBaselineClusterState().clone();
versionPatchedState.setVersion(current.getVersion());
if (versionPatchedState.equals(current)) {
return;
}
}
}
handleNewPublishedState(states);
}
public ClusterState getCurrentSystemState() {
synchronized(timer) {
return current;
}
}
public void waitForState(String stateRegex, Duration timeout) {
waitForState(stateRegex, timeout.toMillis(), 0);
}
/**
* WARNING: If timeIntervalToProvokeRetry is set != 0 that means time will be set far into the future
* and thus hit various unintended timeout periods. Only auto-step time if this is a non-issue.
*/
public void waitForState(String stateRegex, long timeout, long timeIntervalToProvokeRetry) {
Pattern p = Pattern.compile(stateRegex);
long startTime = System.currentTimeMillis();
final long endTime = startTime + timeout;
int iteration = 0;
while (true) {
ClusterState currentClusterState;
synchronized(timer) {
currentClusterState = current;
if (currentClusterState != null) {
Matcher m = p.matcher(currentClusterState.toString());
if (m.matches()) {
return;
}
}
try {
if (timeIntervalToProvokeRetry == 0) {
var waitTime = Math.max(1, endTime - startTime);
timer.wait(waitTime);
} else {
if (++iteration % 10 == 0) {
timer.advanceTime(timeIntervalToProvokeRetry);
}
timer.wait(10);
}
} catch (InterruptedException e) {
throw new RuntimeException(e);
}
}
if (System.currentTimeMillis() >= endTime) {
throw new IllegalStateException("Timeout. Did not find a state matching " + stateRegex + " within timeout of " + timeout + " milliseconds. Current state is " + currentClusterState);
}
}
}
}
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