/*
* 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.translator;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Arrays;
import java.util.List;
import org.teiid.language.Argument;
import org.teiid.language.Call;
import org.teiid.language.Command;
import org.teiid.language.QueryExpression;
import org.teiid.logging.LogConstants;
import org.teiid.logging.LogManager;
import org.teiid.logging.MessageLevel;
import org.teiid.metadata.RuntimeMetadata;
/**
* Demonstrates the delegating translator pattern to add low level logging.
*
* @param <F>
* @param <C>
*/
@Translator(name="record-logging", description="A translator logging all results returned by translators.")
public class RecordLoggingExecutionFactory<F, C> extends BaseDelegatingExecutionFactory<F, C> {
private static final class LoggingHandler implements InvocationHandler {
private final Execution execution;
private final ExecutionContext executionContext;
private LoggingHandler(Execution execution, ExecutionContext executionContext) {
this.execution = execution;
this.executionContext = executionContext;
}
@Override
public Object invoke(Object arg0, Method arg1, Object[] arg2)
throws Throwable {
try {
Object result = arg1.invoke(execution, arg2);
if (arg1.getName().equals("next")) { //$NON-NLS-1$
LogManager.log(MessageLevel.TRACE, LogConstants.CTX_COMMANDLOGGING, executionContext.getRequestId() + " " + result); //$NON-NLS-1$
} else if (arg1.getName().equals("getUpdateCounts")) { //$NON-NLS-1$
LogManager.log(MessageLevel.TRACE, LogConstants.CTX_COMMANDLOGGING, executionContext.getRequestId() + " " + Arrays.toString((int[])result)); //$NON-NLS-1$
} else if (arg1.getName().equals("getOutputParameterValues")) { //$NON-NLS-1$
LogManager.log(MessageLevel.TRACE, LogConstants.CTX_COMMANDLOGGING, executionContext.getRequestId() + " " + Arrays.toString((Object[])result)); //$NON-NLS-1$
}
return result;
} catch (InvocationTargetException e) {
throw e.getTargetException();
}
}
}
@Override
public ProcedureExecution createDirectExecution(List<Argument> arguments,
Command command, ExecutionContext executionContext,
RuntimeMetadata metadata, C connection) throws TranslatorException {
final ProcedureExecution execution = getDelegate().createDirectExecution(arguments, command, executionContext,
metadata, connection);
return (ProcedureExecution)Proxy.newProxyInstance(RecordLoggingExecutionFactory.class.getClassLoader(), new Class[] {ProcedureExecution.class}, new LoggingHandler(execution, executionContext));
}
@Override
public ProcedureExecution createProcedureExecution(Call command,
ExecutionContext executionContext, RuntimeMetadata metadata,
C connection) throws TranslatorException {
final ProcedureExecution execution = getDelegate().createProcedureExecution(command, executionContext,
metadata, connection);
return (ProcedureExecution)Proxy.newProxyInstance(RecordLoggingExecutionFactory.class.getClassLoader(), new Class[] {ProcedureExecution.class}, new LoggingHandler(execution, executionContext));
}
@Override
public ResultSetExecution createResultSetExecution(QueryExpression command,
ExecutionContext executionContext, RuntimeMetadata metadata,
C connection) throws TranslatorException {
ResultSetExecution execution = getDelegate().createResultSetExecution(command, executionContext, metadata,
connection);
return (ResultSetExecution)Proxy.newProxyInstance(RecordLoggingExecutionFactory.class.getClassLoader(), new Class[] {ResultSetExecution.class}, new LoggingHandler(execution, executionContext));
}
@Override
public UpdateExecution createUpdateExecution(Command command,
ExecutionContext executionContext, RuntimeMetadata metadata,
C connection) throws TranslatorException {
UpdateExecution execution = getDelegate().createUpdateExecution(command, executionContext, metadata,
connection);
return (UpdateExecution)Proxy.newProxyInstance(RecordLoggingExecutionFactory.class.getClassLoader(), new Class[] {UpdateExecution.class}, new LoggingHandler(execution, executionContext));
}
}