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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.config.proxy;
import com.yahoo.config.subscription.ConfigSource;
import com.yahoo.config.subscription.ConfigSourceSet;
import com.yahoo.config.subscription.impl.GenericConfigHandle;
import com.yahoo.config.subscription.impl.GenericConfigSubscriber;
import com.yahoo.config.subscription.impl.JRTConfigRequester;
import com.yahoo.log.LogLevel;
import com.yahoo.vespa.config.ConfigKey;
import com.yahoo.yolean.Exceptions;
import com.yahoo.vespa.config.RawConfig;
import com.yahoo.vespa.config.TimingValues;
import java.util.Map;
import java.util.logging.Logger;
/**
* @author hmusum
*/
public class UpstreamConfigSubscriber implements Subscriber {
private final static Logger log = Logger.getLogger(UpstreamConfigSubscriber.class.getName());
private final RawConfig config;
private final ConfigSourceClient configSourceClient;
private final ConfigSource configSourceSet;
private final TimingValues timingValues;
private final Map<ConfigSourceSet, JRTConfigRequester> requesterPool;
private final MemoryCache memoryCache;
private GenericConfigSubscriber subscriber;
private GenericConfigHandle handle;
UpstreamConfigSubscriber(RawConfig config, ConfigSourceClient configSourceClient, ConfigSource configSourceSet,
TimingValues timingValues, Map<ConfigSourceSet, JRTConfigRequester> requesterPool,
MemoryCache memoryCache) {
this.config = config;
this.configSourceClient = configSourceClient;
this.configSourceSet = configSourceSet;
this.timingValues = timingValues;
this.requesterPool = requesterPool;
this.memoryCache = memoryCache;
}
void subscribe() {
subscriber = new GenericConfigSubscriber(requesterPool);
ConfigKey<?> key = config.getKey();
handle = subscriber.subscribe(new ConfigKey<>(key.getName(), key.getConfigId(), key.getNamespace()),
config.getDefContent(), configSourceSet, timingValues);
}
@Override
public void run() {
do {
if (! subscriber.nextGeneration()) continue;
try {
updateWithNewConfig(handle);
} catch (Exception e) { // To avoid thread throwing exception and loop never running this again
log.log(LogLevel.WARNING, "Got exception: " + Exceptions.toMessageString(e));
} catch (Throwable e) {
com.yahoo.protect.Process.logAndDie("Got error, exiting: " + Exceptions.toMessageString(e));
}
} while (!subscriber.isClosed());
}
private void updateWithNewConfig(GenericConfigHandle handle) {
RawConfig newConfig = handle.getRawConfig();
log.log(LogLevel.DEBUG, () -> "config to be returned for '" + newConfig.getKey() +
"', generation=" + newConfig.getGeneration() +
", payload=" + newConfig.getPayload());
memoryCache.update(newConfig);
configSourceClient.updateSubscribers(newConfig);
}
@Override
public void cancel() {
if (subscriber != null) {
subscriber.close();
}
}
}
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