package org.jboss.errai.common.client.logging;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Formatter;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.jboss.errai.common.client.logging.formatters.ErraiSimpleFormatter;
import org.jboss.errai.common.client.logging.handlers.ErraiConsoleLogHandler;
import org.jboss.errai.common.client.logging.handlers.ErraiDevelopmentModeLogHandler;
import org.jboss.errai.common.client.logging.handlers.ErraiLogHandler;
import org.jboss.errai.common.client.logging.handlers.ErraiSystemLogHandler;
import com.google.gwt.core.client.EntryPoint;
import com.google.gwt.logging.client.HasWidgetsLogHandler;
/**
* Initializes Errai log handlers, which are:
* <ul>
* <li>{@link ErraiSystemLogHandler}: Prints to terminal in Dev Mode.</li>
* <li>{@link ErraiConsoleLogHandler}: Logs to web console.</li>
* <li>{@link ErraiDevelopmentModeLogHandler}: Logs to Dev Mode window.</li>
* </ul>
*
* By default these handlers use the {@link ErraiSimpleFormatter} to format
* output.
*
* @author Max Barkley <mbarkley@redhat.com>
*/
public class LoggingHandlerConfigurator implements EntryPoint {
private Map<Class<? extends ErraiLogHandler>, Handler> handlers = new HashMap<Class<? extends ErraiLogHandler>, Handler>();
private static LoggingHandlerConfigurator instance;
@Override
public void onModuleLoad() {
final Logger logger = Logger.getLogger("");
// FIXME temporary workaround for
// https://groups.google.com/forum/#!topic/google-web-toolkit/Sd9P0UjUyRA
// We had to remove <set-property name="gwt.logging.popupHandler"
// value="DISABLED"/> for GWT 2.7 compatibility but don't want to annoy our
// users on older GWT versions with the pop-up window or force them to
// disable the logger themselves.
Handler[] logHandlers = logger.getHandlers();
for (Handler logHandler : logHandlers) {
if (logHandler instanceof HasWidgetsLogHandler) {
logger.removeHandler(logHandler);
((HasWidgetsLogHandler)logHandler).clear();
}
}
handlers.put(ErraiSystemLogHandler.class, new ErraiSystemLogHandler());
logger.addHandler(handlers.get(ErraiSystemLogHandler.class));
handlers.put(ErraiConsoleLogHandler.class, new ErraiConsoleLogHandler());
logger.addHandler(handlers.get(ErraiConsoleLogHandler.class));
handlers.put(ErraiDevelopmentModeLogHandler.class, new ErraiDevelopmentModeLogHandler());
logger.addHandler(handlers.get(ErraiDevelopmentModeLogHandler.class));
instance = this;
}
/**
* @return The single instance of {@link LoggingHandlerConfigurator}.
*/
public static LoggingHandlerConfigurator get() {
return instance;
}
/**
* Get the top-level Errai log handlers. This could be useful if you wish to
* change the {@link Level} or {@link Formatter} of a handler.
*
* @param handlerType
* The type of an {@link ErraiLogHandler}.
* @return The active {@link Handler} of the requested type.
*/
@SuppressWarnings("unchecked")
public <H extends ErraiLogHandler> H getHandler(Class<H> handlerType) {
return (H) handlers.get(handlerType);
}
}