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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.container.di;
import com.yahoo.concurrent.DaemonThreadFactory;
import com.yahoo.config.ConfigInstance;
import com.yahoo.config.subscription.ConfigSource;
import com.yahoo.config.subscription.ConfigSourceSet;
import com.yahoo.container.di.config.Subscriber;
import com.yahoo.container.di.config.SubscriberFactory;
import com.yahoo.vespa.config.ConfigKey;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.WeakHashMap;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.SynchronousQueue;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* @author Tony Vaagenes
* @author ollivir
*/
public class CloudSubscriberFactory implements SubscriberFactory {
private final ConfigSource configSource;
private final Map<CloudSubscriber, Integer> activeSubscribers = new WeakHashMap<>();
private final ExecutorService executor;
private Optional<Long> testGeneration = Optional.empty();
public CloudSubscriberFactory(ConfigSource configSource) {
this.configSource = configSource;
executor = new ThreadPoolExecutor(1, Integer.MAX_VALUE,
1, TimeUnit.SECONDS, new SynchronousQueue<>(),
new DaemonThreadFactory("cloud-subscriber-factory"));
}
@Override
public void close() {
executor.shutdown();
try {
if ( ! executor.awaitTermination(10, TimeUnit.SECONDS)) {
executor.shutdownNow();
}
} catch (InterruptedException e) { }
}
@Override
public Subscriber getSubscriber(Set<? extends ConfigKey<?>> configKeys, String name) {
Set<ConfigKey<ConfigInstance>> subscriptionKeys = new HashSet<>();
for(ConfigKey<?> key: configKeys) {
@SuppressWarnings("unchecked") // ConfigKey is defined as <CONFIGCLASS extends ConfigInstance>
ConfigKey<ConfigInstance> invariant = (ConfigKey<ConfigInstance>) key;
subscriptionKeys.add(invariant);
}
CloudSubscriber subscriber = new CloudSubscriber(executor, name, configSource, subscriptionKeys);
testGeneration.ifPresent(subscriber.getSubscriber()::reload); // TODO: test specific code, remove
activeSubscribers.put(subscriber, 0);
return subscriber;
}
//TODO: test specific code, remove
@Override
public void reloadActiveSubscribers(long generation) {
testGeneration = Optional.of(generation);
List<CloudSubscriber> subscribers = new ArrayList<>(activeSubscribers.keySet());
subscribers.forEach(s -> s.getSubscriber().reload(generation));
}
public static class Provider implements com.google.inject.Provider<SubscriberFactory> {
@Override
public SubscriberFactory get() {
return new CloudSubscriberFactory(ConfigSourceSet.createDefault());
}
}
}
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