org.glassfish.hk2.configuration.hub.internal.WriteableBeanDatabaseImpl Maven / Gradle / Ivy
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package org.glassfish.hk2.configuration.hub.internal;
import java.io.PrintStream;
import java.util.Collections;
import java.util.HashMap;
import java.util.HashSet;
import java.util.LinkedList;
import java.util.Map;
import java.util.Set;
import org.glassfish.hk2.configuration.hub.api.Change;
import org.glassfish.hk2.configuration.hub.api.Instance;
import org.glassfish.hk2.configuration.hub.api.Type;
import org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase;
import org.glassfish.hk2.configuration.hub.api.WriteableType;
/**
* @author jwells
*
*/
public class WriteableBeanDatabaseImpl implements WriteableBeanDatabase {
private final long baseRevision;
private final HashMap types = new HashMap();
private final HubImpl hub;
private final LinkedList changes = new LinkedList();
private final LinkedList removedTypes = new LinkedList();
private boolean committed = false;
/* package */ WriteableBeanDatabaseImpl(HubImpl hub, BeanDatabaseImpl currentDatabase) {
this.hub = hub;
baseRevision = currentDatabase.getRevision();
for (Type type : currentDatabase.getAllTypes()) {
types.put(type.getName(), new WriteableTypeImpl(this, (TypeImpl) type));
}
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getAllTypes()
*/
@Override
public synchronized Set getAllTypes() {
return Collections.unmodifiableSet(new HashSet(types.values()));
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getAllWriteableTypes()
*/
@Override
public Set getAllWriteableTypes() {
return Collections.unmodifiableSet(new HashSet(types.values()));
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getType(java.lang.String)
*/
@Override
public synchronized Type getType(String type) {
return types.get(type);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#getInstance(java.lang.String, java.lang.Object)
*/
@Override
public synchronized Instance getInstance(String type, String instanceKey) {
Type t = getType(type);
if (t == null) return null;
return t.getInstance(instanceKey);
}
private void checkState() {
if (committed) throw new IllegalStateException("This database has already been committed");
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#addType(java.lang.String)
*/
@Override
public synchronized WriteableType addType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl wti = new WriteableTypeImpl(this, typeName);
changes.add(new ChangeImpl(Change.ChangeCategory.ADD_TYPE,
wti,
null,
null,
null,
null));
types.put(typeName, wti);
return wti;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#removeType(java.lang.String)
*/
@Override
public synchronized Type removeType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl retVal = types.remove(typeName);
if (retVal == null) return null;
Map instances = retVal.getInstances();
for (String key : new HashSet(instances.keySet())) {
retVal.removeInstance(key);
}
changes.add(new ChangeImpl(Change.ChangeCategory.REMOVE_TYPE,
retVal,
null,
null,
null,
null));
removedTypes.add(retVal);
return retVal;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#getWriteableType(java.lang.String)
*/
@Override
public synchronized WriteableType getWriteableType(String typeName) {
checkState();
return types.get(typeName);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#findOrAddWriteableType(java.lang.String)
*/
@Override
public synchronized WriteableType findOrAddWriteableType(String typeName) {
if (typeName == null) throw new IllegalArgumentException();
checkState();
WriteableTypeImpl wti = types.get(typeName);
if (wti == null) {
return addType(typeName);
}
return wti;
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#commit()
*/
@Override
public void commit() {
commit(null);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.WriteableBeanDatabase#commit()
*/
@Override
public void commit(Object commitMessage) {
synchronized (this) {
checkState();
committed = true;
}
// Outside of lock
hub.setCurrentDatabase(this, commitMessage, changes);
for (WriteableTypeImpl removedType : removedTypes) {
removedType.getHelper().dispose();
}
removedTypes.clear();
}
/* package */ long getBaseRevision() {
return baseRevision;
}
/* package */ synchronized void addChange(Change change) {
changes.add(change);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#dumpDatabase()
*/
@Override
public void dumpDatabase() {
dumpDatabase(System.err);
}
/* (non-Javadoc)
* @see org.glassfish.hk2.configuration.hub.api.BeanDatabase#dumpDatabase(java.io.PrintStream)
*/
@Override
public synchronized void dumpDatabase(PrintStream output) {
Utilities.dumpDatabase(this, output);
}
}
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