/*
* JBoss, Home of Professional Open Source.
* See the COPYRIGHT.txt file distributed with this work for information
* regarding copyright ownership. Some portions may be licensed
* to Red Hat, Inc. under one or more contributor license agreements.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*/
package org.teiid.dqp.internal.process;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.teiid.adminapi.impl.ModelMetaData;
import org.teiid.adminapi.impl.VDBMetaData;
import org.teiid.core.CoreConstants;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidException;
import org.teiid.core.TeiidRuntimeException;
import org.teiid.dqp.internal.datamgr.ConnectorManager;
import org.teiid.dqp.internal.datamgr.ConnectorManagerRepository;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.query.QueryPlugin;
import org.teiid.query.optimizer.capabilities.BasicSourceCapabilities;
import org.teiid.query.optimizer.capabilities.CapabilitiesFinder;
import org.teiid.query.optimizer.capabilities.SourceCapabilities;
import org.teiid.query.optimizer.capabilities.SourceCapabilities.Capability;
import org.teiid.translator.SourceSystemFunctions;
/**
*/
public class CachedFinder implements CapabilitiesFinder {
static class InvalidCaps extends BasicSourceCapabilities {
};
private static BasicSourceCapabilities SYSTEM_CAPS = new BasicSourceCapabilities();
static {
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_IN, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_COMPARE_EQ, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_COMPARE_ORDERED, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_ONLY_LITERAL_COMPARE, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_LIKE, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_LIKE_ESCAPE, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_LIKE_REGEX, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.CRITERIA_SIMILAR, true);
SYSTEM_CAPS.setCapabilitySupport(Capability.NO_PROJECTION, true);
SYSTEM_CAPS.setFunctionSupport(SourceSystemFunctions.UCASE, true);
SYSTEM_CAPS.setSourceProperty(Capability.MAX_IN_CRITERIA_SIZE, 100000);
SYSTEM_CAPS.setSourceProperty(Capability.MAX_DEPENDENT_PREDICATES, 1);
}
private ConnectorManagerRepository connectorRepo;
private VDBMetaData vdb;
private Map<String, SourceCapabilities> userCache = new HashMap<String, SourceCapabilities>();
/**
* Construct a CacheFinder that wraps another finder
* @param internalFinder Finder to wrap
*/
public CachedFinder(ConnectorManagerRepository repo, VDBMetaData vdb) {
this.connectorRepo = repo;
this.vdb = vdb;
userCache.put(CoreConstants.SYSTEM_MODEL, SYSTEM_CAPS);
userCache.put(CoreConstants.ODBC_MODEL, SYSTEM_CAPS);
userCache.put(CoreConstants.SYSTEM_ADMIN_MODEL, SYSTEM_CAPS);
}
/**
* Find capabilities used the cache if possible, otherwise do the lookup.
*/
public SourceCapabilities findCapabilities(String modelName) throws TeiidComponentException {
SourceCapabilities caps = userCache.get(modelName);
if(caps != null) {
return caps;
}
ModelMetaData model = vdb.getModel(modelName);
List<String> sourceNames = model.getSourceNames();
if (sourceNames.isEmpty()) {
throw new TeiidRuntimeException(QueryPlugin.Event.TEIID30499, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30499, modelName));
}
TeiidException cause = null;
for (String sourceName:sourceNames) {
//TOOD: in multi-source mode it may be necessary to compute minimal capabilities across the sources
ConnectorManager mgr = this.connectorRepo.getConnectorManager(sourceName);
if (mgr == null) {
throw new TeiidComponentException(QueryPlugin.Event.TEIID30497, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30497, sourceName, modelName, sourceName));
}
try {
caps = mgr.getCapabilities();
break;
} catch(TeiidException e) {
cause = e;
LogManager.logDetail(LogConstants.CTX_DQP, e, "Could not obtain capabilities for" + sourceName); //$NON-NLS-1$
}
}
if (caps == null) {
InvalidCaps ic = new InvalidCaps();
ic.setSourceProperty(Capability.INVALID_EXCEPTION, cause);
caps = ic;
}
userCache.put(modelName, caps);
return caps;
}
public void addCapabilities(String connBinding, SourceCapabilities sourceCaps) {
userCache.put(connBinding, sourceCaps);
}
public boolean isValid(String modelName) {
SourceCapabilities caps = userCache.get(modelName);
return caps != null && !(caps instanceof InvalidCaps);
}
}