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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.config.subscription;
import com.yahoo.foo.AppConfig;
import com.yahoo.vespa.config.TimingValues;
/**
* @author hmusum
*
* Application that subscribes to config defined in app.def and
* generated code in AppConfig.java.
*/
class AppService {
private int timesConfigured = 0;
private AppConfig config = null;
private final ConfigSubscriber subscriber;
private boolean stopThread = false;
AppService(String configId, ConfigSourceSet csource) {
this(configId, csource, null);
}
int timesConfigured() { return timesConfigured; }
private AppService(String configId, ConfigSourceSet csource, TimingValues timingValues) {
if (csource == null) throw new IllegalArgumentException("Config source cannot be null");
subscriber = new ConfigSubscriber(csource);
ConfigHandle<AppConfig> temp;
if (timingValues == null) {
temp = subscriber.subscribe(AppConfig.class, configId);
} else {
temp = subscriber.subscribe(AppConfig.class, configId, csource, timingValues);
}
ConfigHandle<AppConfig> handle = temp;
Thread configThread = new Thread(() -> {
while (!stopThread) {
boolean changed = subscriber.nextConfig(500, false);
if (changed) {
configure(handle.getConfig());
timesConfigured++;
}
}
});
subscriber.nextConfig(5000, false);
timesConfigured++;
configure(handle.getConfig());
configThread.setDaemon(true);
configThread.start();
}
private void configure(AppConfig config) {
this.config = config;
}
public void cancelSubscription() {
subscriber.close();
stopThread = true;
}
public AppConfig getConfig() {
return config;
}
public boolean isConfigured() {
return (timesConfigured > 0);
}
}
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