net.sf.hajdbc.state.health.observer.Observer Maven / Gradle / Ivy
package net.sf.hajdbc.state.health.observer;
import net.sf.hajdbc.logging.Level;
import net.sf.hajdbc.logging.Logger;
import net.sf.hajdbc.logging.LoggerFactory;
import java.util.*;
import java.util.stream.Collectors;
public class Observer {
final Logger logger = LoggerFactory.getLogger(this.getClass());
private final List adapters = new ArrayList<>();
public Observer() {
adapters.add(new NetworkDetectObserveAdapter());
ServiceLoader loader = ServiceLoader.load(ObserveAdapter.class);
Iterator iterator = loader.iterator();
while(iterator.hasNext()){
adapters.add(iterator.next());
}
Collections.sort(adapters, new Comparator() {
@Override
public int compare(ObserveAdapter o1, ObserveAdapter o2) {
return Integer.compare(o2.getWeight(),o1.getWeight());
}
});
}
/**
* Observe adapters
* @return Observe adapters
*/
public List getAdapters() {
return Collections.unmodifiableList(adapters);
}
/**
* Return observable or not
* @param needDown 是否是下线检测，false表示上线检测
* @param localIp local ip
* @param ips ip list
* @return observable or not
*/
public boolean isObservable(boolean needDown, String localIp, List ips){
List mustAdapters = adapters.stream().filter(e -> !e.isOptional()).collect(Collectors.toList());
for (ObserveAdapter adapter : mustAdapters) {
try {
if (!adapter.isObservable(needDown, localIp, ips)) {
return false;
}
}catch (Exception e){
logger.log(Level.WARN, e);
}
}
List optionalAdapters = adapters.stream().filter(e -> e.isOptional()).collect(Collectors.toList());
if(optionalAdapters.size()>0) {
for (ObserveAdapter adapter : mustAdapters) {
try {
if (adapter.isObservable(needDown, localIp, ips)) {
return true;
}
} catch (Exception e) {
logger.log(Level.WARN, e);
}
}
return false;
}
return true;
}
}