Mercurial > dive4elements > river
view flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/DatacageBackendListener.java @ 5779:ebec12def170
Datacage: Add a pool of builders to make it multi threadable.
XML DOM is not thread safe. Therefore the old implementation only allowed one thread
to use the builder at a time. As the complexity of the configuration
has increased over time this has become a bottleneck of the whole application
because it took quiet some time to build a result. Furthermore the builder code path
is visited very frequent. So many concurrent requests were piled up
resulting in long waits for the users.
To mitigate this problem a round robin pool of builders is used now.
Each of the pooled builders has an independent copy of the XML template
and can be run in parallel.
The number of builders is determined by the system property
'flys.datacage.pool.size'. It defaults to 4.
author | Sascha L. Teichmann <teichmann@intevation.de> |
---|---|
date | Sun, 21 Apr 2013 12:48:09 +0200 |
parents | cbe2febe30cc |
children |
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package de.intevation.flys.artifacts.datacage; import java.util.List; import de.intevation.artifacts.Artifact; import de.intevation.artifacts.ArtifactCollection; import de.intevation.artifacts.GlobalContext; import de.intevation.artifacts.User; import de.intevation.artifactdatabase.BackendListener; import de.intevation.artifactdatabase.Backend; import org.apache.log4j.Logger; import org.w3c.dom.Document; /** Triggers Datacage to update db. */ public class DatacageBackendListener implements BackendListener { private static Logger log = Logger.getLogger(DatacageBackendListener.class); protected GlobalContext context; public DatacageBackendListener() { log.debug("new DatacageBackendListener"); } protected Datacage getDatacage() { Object listener = context.get(Datacage.DATACAGE_KEY); return listener instanceof Datacage ? (Datacage)listener : null; } @Override public void setup(GlobalContext context) { log.debug("setup"); this.context = context; Datacage l = getDatacage(); if (l != null) { l.setup(context); } } @Override public void createdArtifact(Artifact artifact, Backend backend) { log.debug("createdArtifact"); Datacage l = getDatacage(); if (l != null) { l.createdArtifact(artifact, backend, context); } } @Override public void storedArtifact(Artifact artifact, Backend backend) { log.debug("storedArtifact"); Datacage l = getDatacage(); if (l != null) { l.storedArtifact(artifact, backend, context); } } @Override public void createdUser(User user, Backend backend) { log.debug("createdUser"); Datacage l = getDatacage(); if (l != null) { l.createdUser(user, backend, context); } } @Override public void deletedUser(String identifier, Backend backend) { log.debug("deletedUser"); Datacage l = getDatacage(); if (l != null) { l.deletedUser(identifier, backend, context); } } @Override public void createdCollection( ArtifactCollection collection, Backend backend ) { log.debug("createdCollection"); Datacage l = getDatacage(); if (l != null) { l.createdCollection(collection, backend, context); } } @Override public void deletedCollection(String identifier, Backend backend) { log.debug("deletedCollection"); Datacage l = getDatacage(); if (l != null) { l.deletedCollection(identifier, backend, context); } } @Override public void changedCollectionAttribute( String identifier, Document document, Backend backend ) { log.debug("changedCollectionAttribute"); Datacage l = getDatacage(); if (l != null) { l.changedCollectionAttribute( identifier, document, backend, context); } } @Override public void changedCollectionItemAttribute( String collectionId, String artifactId, Document document, Backend backend ) { log.debug("changedCollectionItemAttribute"); Datacage l = getDatacage(); if (l != null) { l.changedCollectionItemAttribute( collectionId, artifactId, document, backend, context); } } @Override public void addedArtifactToCollection( String artifactId, String collectionId, Backend backend ) { log.debug("addedArtifactToCollection"); Datacage l = getDatacage(); if (l != null) { l.addedArtifactToCollection( artifactId, collectionId, backend, context); } } @Override public void removedArtifactFromCollection( String artifactId, String collectionId, Backend backend ) { log.debug("removedArtifactFromCollection"); Datacage l = getDatacage(); if (l != null) { l.removedArtifactFromCollection( artifactId, collectionId, backend, context); } } @Override public void setCollectionName( String collectionId, String name ) { log.debug("setCollectionName"); Datacage l = getDatacage(); if (l != null) { l.setCollectionName(collectionId, name, context); } } @Override public void killedCollections(List<String> identifiers, Backend backend) { log.debug("killedCollections"); Datacage l = getDatacage(); if (l != null) { l.killedCollections(identifiers, context); } } @Override public void killedArtifacts(List<String> identifiers, Backend backend) { log.debug("killedArtifacts"); Datacage l = getDatacage(); if (l != null) { l.killedArtifacts(identifiers, context); } } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :