/*
* 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.query.metadata;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.List;
import javax.resource.ResourceException;
import org.teiid.core.TeiidRuntimeException;
import org.teiid.core.util.AccessibleByteArrayOutputStream;
import org.teiid.core.util.PropertiesUtils;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.metadata.FunctionMethod;
import org.teiid.metadata.MetadataFactory;
import org.teiid.metadata.MetadataRepository;
import org.teiid.query.QueryPlugin;
import org.teiid.resource.spi.WrappedConnection;
import org.teiid.translator.ExecutionFactory;
import org.teiid.translator.TranslatorException;
public class NativeMetadataRepository extends MetadataRepository {
public static final String IMPORT_PUSHDOWN_FUNCTIONS = "importer.importPushdownFunctions"; //$NON-NLS-1$
@Override
public void loadMetadata(MetadataFactory factory, ExecutionFactory executionFactory, Object connectionFactory) throws TranslatorException {
if (executionFactory == null ) {
throw new TranslatorException(QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30591, factory.getName()));
}
if (connectionFactory == null && executionFactory.isSourceRequiredForMetadata()) {
throw new TranslatorException(QueryPlugin.Event.TEIID31097, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31097));
}
ClassLoader originalCL = Thread.currentThread().getContextClassLoader();
try {
Thread.currentThread().setContextClassLoader(executionFactory.getClass().getClassLoader());
getMetadata(factory, executionFactory, connectionFactory);
} finally {
Thread.currentThread().setContextClassLoader(originalCL);
}
}
private void getMetadata(MetadataFactory factory, ExecutionFactory executionFactory, Object connectionFactory)
throws TranslatorException {
Object connection = null;
try {
connection = executionFactory.getConnection(connectionFactory, null);
} catch (Throwable e) {
// if security pass through is enabled the connection creation may fail at the startup
if (executionFactory.isSourceRequiredForMetadata()) {
throw new TranslatorException(QueryPlugin.Event.TEIID31178, e, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID31178, factory.getName()));
}
LogManager.logDetail(LogConstants.CTX_CONNECTOR, e, "Exception getting connection for metadata, but no connection is required"); //$NON-NLS-1$
}
Object unwrapped = null;
if (connection instanceof WrappedConnection) {
try {
unwrapped = ((WrappedConnection)connection).unwrap();
} catch (ResourceException e) {
if (executionFactory.isSourceRequiredForMetadata()) {
throw new TranslatorException(QueryPlugin.Event.TEIID30477, e, QueryPlugin.Util.gs(QueryPlugin.Event.TEIID30477, factory.getName()));
}
connection = null;
LogManager.logDetail(LogConstants.CTX_CONNECTOR, e, "Could not unwrap exception to get metadata, but no connection is required"); //$NON-NLS-1$
}
}
try {
executionFactory.getMetadata(factory, (unwrapped == null) ? connection:unwrapped);
} finally {
executionFactory.closeConnection(connection, connectionFactory);
}
if (PropertiesUtils.getBooleanProperty(factory.getModelProperties(), IMPORT_PUSHDOWN_FUNCTIONS, false)) { //$NON-NLS-1$
List<FunctionMethod> functions = executionFactory.getPushDownFunctions();
//create a copy and add to the schema
if (!functions.isEmpty()) {
try {
AccessibleByteArrayOutputStream baos = new AccessibleByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(functions);
oos.close();
ObjectInputStream ois = new ObjectInputStream(new ByteArrayInputStream(baos.getBuffer(), 0, baos.getCount()));
functions = (List<FunctionMethod>) ois.readObject();
for (FunctionMethod functionMethod : functions) {
factory.addFunction(functionMethod);
functionMethod.setProperty(FunctionMethod.SYSTEM_NAME, functionMethod.getName());
}
} catch (IOException e) {
throw new TeiidRuntimeException(e);
} catch (ClassNotFoundException e) {
throw new TeiidRuntimeException(e);
}
}
}
}
}