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71 lines
2.1 KiB
Java
71 lines
2.1 KiB
Java
package org.gcube.application.geoportal.service.engine.providers;
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import lombok.NonNull;
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import lombok.RequiredArgsConstructor;
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import lombok.Setter;
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import lombok.Synchronized;
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import lombok.extern.slf4j.Slf4j;
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import org.gcube.application.geoportal.service.model.internal.faults.ConfigurationException;
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import org.gcube.application.geoportal.service.utils.ContextUtils;
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import java.time.LocalDateTime;
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import java.time.temporal.TemporalAmount;
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import java.util.concurrent.ConcurrentHashMap;
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@Slf4j
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@RequiredArgsConstructor
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public abstract class AbstractScopedMap<T> implements Engine<T>{
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// scope-> object
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private ConcurrentHashMap<String, TTLObject<T>> scopeMap=new ConcurrentHashMap<String,TTLObject<T>>();
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@Setter
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private TemporalAmount TTL=null;
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@NonNull
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private String name;
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@Synchronized
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public T getObject() throws ConfigurationException {
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String currentScope=ContextUtils.getCurrentScope();
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log.debug(name+" : obtaining object for context "+currentScope);
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TTLObject<T> found=scopeMap.get(currentScope);
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if(found== null){
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log.debug(name+" : init object for context "+currentScope);
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TTLObject<T> toPut=new TTLObject<T>(LocalDateTime.now(),retrieveObject());
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scopeMap.put(currentScope, toPut);
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return toPut.getTheObject();
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}
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if(TTL!=null) {
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if(found.getCreationTime().plus(TTL).isBefore(LocalDateTime.now())) {
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log.debug(name+" : elapsed TTL, disposing..");
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dispose(found.getTheObject());
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TTLObject<T> newer=new TTLObject<T>(LocalDateTime.now(),retrieveObject());
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scopeMap.put(currentScope, newer);
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found=scopeMap.get(currentScope);
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}
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}else {log.debug(name+" : TTL is null, never disposing..");}
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log.debug("Returning {} ",found);
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return found.getTheObject();
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}
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@Override
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public void shutdown() {
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log.warn(name + ": shutting down");
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scopeMap.forEach((String s,TTLObject<T> o)->{
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try{if(o!=null&&o.getTheObject()!=null)
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dispose(o.getTheObject());
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}catch(Throwable t) {
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log.warn(name +": unable to dispose ",t);
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}
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});
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}
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protected abstract T retrieveObject() throws ConfigurationException;
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protected abstract void dispose(T toDispose);
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}
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