Class WebKit.Webkit2AsyncToSync.CallBackMap

java.lang.Object

org.eclipse.swt.browser.WebKit.Webkit2AsyncToSync.CallBackMap

Enclosing class:

WebKit.Webkit2AsyncToSync

private static class WebKit.Webkit2AsyncToSync.CallBackMap
extends Object

Every callback is tagged with a unique ID. The ID is used for the callback to find the object via which data is returned and allow the original call to finish. Note: The reason each callback is tagged with an ID is because two(or more) subsequent evaluate() calls can be started before the first callback comes back. As such, there would be ambiguity as to which call a callback belongs to, which in turn causes deadlocks. This is typically seen when a webkit2 signal (e.g closeListener) makes a call to evaluate(), when the closeListener was triggered by evaluate("window.close()"). An example test case where this is seen is: org.eclipse.swt.tests.junit.Test_org_eclipse_swt_browser_Browser.test_execute_and_closeListener()

Field Summary

Fields

Modifier and Type	Field	Description
private static HashMap<Integer, WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj>	callbackMap
private static int	nextCallbackId
private static HashSet<Integer>	usedCallbackIds

Constructor Summary

Constructors

Modifier	Constructor	Description
private	CallBackMap()

Method Summary

Modifier and Type	Method	Description
(package private) static int	getNextId()
(package private) static WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj	getObj(int id)
(package private) static int	putObject(WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj obj)
private static void	removeId(int id)
(package private) static void	removeObject(int id)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

callbackMap

private static HashMap<Integer, WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj> callbackMap

nextCallbackId

private static int nextCallbackId

usedCallbackIds

private static HashSet<Integer> usedCallbackIds

Constructor Details

CallBackMap

private CallBackMap()

Method Details

putObject

static int putObject(WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj obj)

getObj

static WebKit.Webkit2AsyncToSync.Webkit2AsyncReturnObj getObj(int id)

removeObject

static void removeObject(int id)

getNextId

static int getNextId()

removeId

private static void removeId(int id)