root / branches / v2_0_0_prep / libraries / libFMap_dal / src / org / gvsig / fmap / dal / resource / impl / DefaultResourceManager.java @ 24496
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package org.gvsig.fmap.dal.resource.impl; |
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import java.lang.reflect.InvocationTargetException; |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Timer; |
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import java.util.TimerTask; |
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import org.gvsig.fmap.dal.DALLocator; |
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import org.gvsig.fmap.dal.DataParameters; |
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import org.gvsig.fmap.dal.exceptions.CopyParametersException; |
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import org.gvsig.fmap.dal.exceptions.DataException; |
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import org.gvsig.fmap.dal.exceptions.InitializeException; |
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import org.gvsig.fmap.dal.resource.Resource; |
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import org.gvsig.fmap.dal.resource.ResourceParameters; |
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import org.gvsig.fmap.dal.resource.exception.AccessResourceException; |
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import org.gvsig.fmap.dal.resource.exception.ResourceException; |
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import org.gvsig.fmap.dal.resource.spi.AbstractResource; |
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import org.gvsig.fmap.dal.resource.spi.ResourceManagerProviderServices; |
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import org.gvsig.fmap.dal.resource.spi.ResourceProvider; |
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import org.gvsig.tools.ToolsLocator; |
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import org.gvsig.tools.observer.Observer; |
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import org.gvsig.tools.observer.impl.DelegateWeakReferencingObservable; |
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import org.slf4j.Logger; |
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import org.slf4j.LoggerFactory; |
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public class DefaultResourceManager implements ResourceManagerProviderServices { |
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final static private String DATA_MANAGER_RESOURCE = "Data.manager.resources"; |
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final static private String DATA_MANAGER_RESOURCE_PARAMS = "Data.manager.resources.params"; |
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// FIXME: rellenar las cadenas
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private static final String DATA_MANAGER_RESOURCE_DESCRIPTION = "DAL Resources types"; |
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private static final String DATA_MANAGER_RESOURCE_PARAMS_DESCRIPTION = "DAL Resources types Parameters"; |
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private Map resources = new HashMap(); |
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private DelegateWeakReferencingObservable delegateObservable = new DelegateWeakReferencingObservable(this); |
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private Timer timer = null; |
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private Logger logger; |
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public DefaultResourceManager() {
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/*
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* Create te extensions point in te registry.
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*/
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ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_RESOURCE, |
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DATA_MANAGER_RESOURCE_DESCRIPTION); |
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ToolsLocator.getExtensionPointManager().add( |
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DATA_MANAGER_RESOURCE_PARAMS, |
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DATA_MANAGER_RESOURCE_PARAMS_DESCRIPTION); |
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} |
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public Logger getLogger() { |
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if (this.logger == null) { |
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this.logger = LoggerFactory.getLogger(this.getClass()); |
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} |
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return this.logger; |
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} |
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public synchronized void remove(Resource resource) |
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throws DataException {
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remove(resource.getName()); |
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} |
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public synchronized void remove(String name) |
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throws DataException {
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ResourceProvider res = (ResourceProvider) this.resources.get(name);
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if (res == null){ |
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throw new IllegalArgumentException("Resource not register:" + name); |
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} |
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if (res.getConsumersCount() < 1) { |
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this.resources.remove(name);
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res.notifyDispose(); |
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} |
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res = null;
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} |
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public Resource getResource(String key){ |
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return (Resource)this.resources.get(key); |
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} |
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public Iterator iterator(){ |
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return this.resources.values().iterator(); |
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} |
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public void addObserver(Observer o) { |
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// TODO a?adir el observador a los recursos que ya existiesen
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this.delegateObservable.addObserver(o);
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} |
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public void deleteObserver(Observer o) { |
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this.delegateObservable.deleteObserver(o);
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} |
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public void deleteObservers() { |
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this.delegateObservable.deleteObservers();
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} |
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public synchronized void collectResources() throws |
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DataException {
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ResourceProvider res; |
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Iterator iter = this.resources.keySet().iterator(); |
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String key;
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while (iter.hasNext()) {
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key = (String) iter.next();
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res = (ResourceProvider) this.resources.get(key);
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if (res.getConsumersCount() < 1) { |
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res.notifyDispose(); |
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iter.remove(); |
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} |
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} |
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} |
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private AbstractResource findResource(ResourceParameters params) {
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AbstractResource res; |
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Iterator iter = this.resources.values().iterator(); |
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while (iter.hasNext()) {
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res = (AbstractResource) iter.next(); |
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try {
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if (res.isThis(params)) {
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return res;
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} |
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} catch (ResourceException e) {
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getLogger() |
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.warn( |
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"Se ha producido un error comprobando si se puede reutilizar el recurso.",
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e); |
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} catch (CopyParametersException e) {
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getLogger() |
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.warn( |
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"Se ha producido un error comprobando si se puede reutilizar el recurso.",
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e); |
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} |
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} |
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return null; |
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} |
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private AbstractResource addResource(AbstractResource resource)
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throws AccessResourceException {
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resources.put(resource.getName(), resource); |
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resource.addObservers(this.delegateObservable);
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return resource;
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} |
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public void startResourceCollector(long milis, Observer observer) { |
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if (this.timer == null){ |
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this.timer = new Timer(); |
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} else{
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this.timer.cancel();
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} |
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// TODO observer
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this.timer.scheduleAtFixedRate(new TimerTask() { |
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public void run() { |
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try {
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DALLocator.getResourceManager().collectResources(); |
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} catch (DataException e) {
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// TODO Notificar con el observer
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} |
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} |
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}, milis, milis); |
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} |
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public void stopResourceCollector() { |
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if (this.timer != null) { |
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this.timer.cancel();
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} |
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} |
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public DataParameters createParameters(String type, Object[] args) |
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throws InitializeException {
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try {
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if (args == null) { |
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return (DataParameters) ToolsLocator.getExtensionPointManager()
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.get( |
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DATA_MANAGER_RESOURCE_PARAMS).create(type); |
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} else {
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return (DataParameters) ToolsLocator.getExtensionPointManager()
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.get(DATA_MANAGER_RESOURCE_PARAMS).create(type, args); |
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} |
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} catch (InstantiationException e) { |
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throw new InitializeException(e); |
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} catch (IllegalAccessException e) { |
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throw new InitializeException(e); |
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} catch (SecurityException e) { |
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throw new InitializeException(e); |
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} catch (IllegalArgumentException e) { |
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throw new InitializeException(e); |
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} catch (NoSuchMethodException e) { |
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throw new InitializeException(e); |
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} catch (InvocationTargetException e) { |
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throw new InitializeException(e); |
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} |
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} |
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public DataParameters createParameters(String type) |
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throws InitializeException {
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return createParameters(type, null); |
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} |
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public ResourceProvider createResource(String type, Object[] params) |
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throws InitializeException {
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return createResource((ResourceParameters) createParameters(type,
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params)); |
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} |
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public ResourceProvider createResource(ResourceParameters params)
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throws InitializeException {
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AbstractResource resource = this.findResource(params);
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if (resource != null) { |
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return resource;
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} |
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try {
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resource = (AbstractResource) ToolsLocator |
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.getExtensionPointManager().get(DATA_MANAGER_RESOURCE) |
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.create( |
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params.getTypeName(), new Object[] { params } |
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); |
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} catch (InstantiationException e) { |
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throw new InitializeException(e); |
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} catch (IllegalAccessException e) { |
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throw new InitializeException(e); |
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} catch (SecurityException e) { |
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throw new InitializeException(e); |
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} catch (IllegalArgumentException e) { |
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throw new InitializeException(e); |
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} catch (NoSuchMethodException e) { |
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throw new InitializeException(e); |
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} catch (InvocationTargetException e) { |
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throw new InitializeException(e); |
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} |
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try {
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return addResource(resource);
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} catch (AccessResourceException e) {
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throw new InitializeException(e); |
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} |
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} |
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public boolean register(String type, String description, |
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Class resourceHandler, Class resourceParams) { |
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ToolsLocator.getExtensionPointManager().add(DATA_MANAGER_RESOURCE, |
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DATA_MANAGER_RESOURCE_DESCRIPTION).append(type, description, |
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resourceHandler); |
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ToolsLocator.getExtensionPointManager().add( |
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DATA_MANAGER_RESOURCE_PARAMS, |
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DATA_MANAGER_RESOURCE_PARAMS_DESCRIPTION).append(type, |
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description, resourceParams); |
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return true; |
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} |
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public List getResourceProviders() { |
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return ToolsLocator.getExtensionPointManager().get(
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DATA_MANAGER_RESOURCE).getNames(); |
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} |
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} |