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* 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.io.Serializable;
import java.util.ArrayList;
import java.util.List;
import org.teiid.api.exception.query.QueryParserException;
import org.teiid.api.exception.query.QueryResolverException;
import org.teiid.cache.Cachable;
import org.teiid.cache.Cache;
import org.teiid.common.buffer.BufferManager;
import org.teiid.common.buffer.TupleBatch;
import org.teiid.common.buffer.TupleBuffer;
import org.teiid.common.buffer.BufferManager.TupleSourceType;
import org.teiid.core.TeiidComponentException;
import org.teiid.core.TeiidException;
import org.teiid.core.types.DataTypeManager;
import org.teiid.core.util.Assertion;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.query.QueryPlugin;
import org.teiid.query.analysis.AnalysisRecord;
import org.teiid.query.metadata.QueryMetadataInterface;
import org.teiid.query.parser.ParseInfo;
import org.teiid.query.parser.QueryParser;
import org.teiid.query.processor.ProcessorPlan;
import org.teiid.query.resolver.QueryResolver;
import org.teiid.query.sql.lang.CacheHint;
import org.teiid.query.sql.lang.Command;
import org.teiid.query.sql.symbol.ElementSymbol;
public class CachedResults implements Serializable, Cachable {
private static final long serialVersionUID = -5603182134635082207L;
private transient Command command;
private transient TupleBuffer results;
private AnalysisRecord analysisRecord;
private String[] types;
private CacheHint hint;
private int batchSize;
private String uuid;
private int rowCount;
private boolean hasLobs;
private AccessInfo accessInfo = new AccessInfo();
public String getId() {
return this.uuid;
}
public AnalysisRecord getAnalysisRecord() {
return analysisRecord;
}
public void setAnalysisRecord(AnalysisRecord analysisRecord) {
this.analysisRecord = analysisRecord;
}
public TupleBuffer getResults() {
return results;
}
public void setResults(TupleBuffer results, ProcessorPlan plan) {
this.results = results;
this.batchSize = results.getBatchSize();
this.types = TupleBuffer.getTypeNames(results.getSchema());
this.rowCount = results.getRowCount();
this.uuid = results.getId();
this.hasLobs = results.isLobs();
this.accessInfo.populate(plan.getContext(), true);
}
public void setCommand(Command command) {
this.command = command;
this.hint = command.getCacheHint();
}
public void setHint(CacheHint hint) {
this.hint = hint;
}
public CacheHint getHint() {
return hint;
}
public synchronized Command getCommand(String sql, QueryMetadataInterface metadata, ParseInfo info) throws QueryParserException, QueryResolverException, TeiidComponentException {
if (command == null) {
command = QueryParser.getQueryParser().parseCommand(sql, info);
}
QueryResolver.resolveCommand(command, metadata);
return command;
}
@Override
public boolean prepare(Cache cache, BufferManager bufferManager) {
Assertion.assertTrue(!this.results.isForwardOnly());
bufferManager.addTupleBuffer(this.results);
return true;
}
@Override
public synchronized boolean restore(Cache cache, BufferManager bufferManager) {
try {
if (this.results == null) {
if (this.hasLobs) {
return false;
}
List<ElementSymbol> schema = new ArrayList<ElementSymbol>(types.length);
for (String type : types) {
ElementSymbol es = new ElementSymbol("x"); //$NON-NLS-1$
es.setType(DataTypeManager.getDataTypeClass(type));
schema.add(es);
}
TupleBuffer buffer = bufferManager.createTupleBuffer(schema, "cached", TupleSourceType.FINAL); //$NON-NLS-1$
buffer.setBatchSize(this.batchSize);
if (this.hint != null) {
buffer.setPrefersMemory(this.hint.getPrefersMemory());
}
for (int row = 1; row <= this.rowCount; row+=this.batchSize) {
TupleBatch batch = (TupleBatch)cache.get(uuid+","+row); //$NON-NLS-1$
if (batch != null) {
buffer.addTupleBatch(batch, true);
}
}
this.results = buffer;
bufferManager.addTupleBuffer(this.results);
this.results.close();
}
this.accessInfo.restore();
return true;
} catch (TeiidException e) {
LogManager.logDetail(LogConstants.CTX_DQP, e, QueryPlugin.Util.getString("not_found_cache")); //$NON-NLS-1$
}
return false;
}
@Override
public AccessInfo getAccessInfo() {
return accessInfo;
}
}