/*
* Copyright 2009 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package com.google.gwt.webworker.client;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.GWT.UncaughtExceptionHandler;
/**
* Base class used for Dedicated Workers and Shared Workers.
* http://www.whatwg.org/specs/web-workers/current-work/
*/
public class AbstractWorker extends JavaScriptObject {
/**
* Takes care of reporting exceptions to the console in hosted mode.
*
* @param listener the listener object to call back.
* @param port argument from the callback.
*/
private static void onErrorImpl(ErrorHandler errorHandler, ErrorEvent event) {
UncaughtExceptionHandler ueh = GWT.getUncaughtExceptionHandler();
if (ueh != null) {
try {
errorHandler.onError(event);
} catch (Exception ex) {
ueh.onUncaughtException(ex);
}
} else {
errorHandler.onError(event);
}
}
protected AbstractWorker() {
// constructors must be protected in JavaScriptObject overlays.
}
/**
* A handler that will be called if the worker encounters an error. Replaces
* any existing handler.
*
* @param handler handler to set when a worker encounters an error.
*/
public final native void setOnError(ErrorHandler handler) /*-{
this.onerror = function(event) {
@com.google.gwt.webworker.client.AbstractWorker::onErrorImpl(Lcom/google/gwt/webworker/client/ErrorHandler;Lcom/google/gwt/webworker/client/ErrorEvent;)(handler, event);
}
}-*/;
}