Editor persist throws "A request is already in progress "

Hello,

I'm trying to set up a basic editor in gwt. Everything works fine, the
editor displays the data and saves but when I try to save again (i.e.
press the save button 2 times) it throws me the error "A request is
already in progress " in the second save, but the first time the
editor saves the data correctly.

How can I solve this, perhaps creating a new Request?

//
//Methods that edit and save the editor, locate in
ComposerEditorContainer class
//
public void edit(RequestContext requestContext) {

editorDriver = GWT.create(Driver.class);
editorDriver.initialize(requestFactory, composerEditor);
editorDriver.edit(composer, requestContext);
}

public void save() {

ComposerRequest composerRequest = (ComposerRequest) editorDriver
.flush();
ComposerProxy newProxy = composerRequest.edit(composer);
composerRequest.persist(newProxy).fire();
}

//
//Events in a presenter that save and initialize the editor
//
eventBus.addHandler(SaveButtonClickedEvent.TYPE,
new SaveButtonClickedEventHandler() {
@Override
public void onSaveButtonClicked(SaveButtonClickedEvent event) {

((ComposerEditorContainer) composerEditorContainer)
.save();
}

});

//this method gets the ComposerProxy from the event and initializes
the editor
//
eventBus.addHandler(BrowserItemClickedEvent.TYPE,
new BrowserItemClickedEventHandler() {
@Override
public void onBrowserItemClicked(
BrowserItemClickedEvent event) {


requestFactory = GWT.create(AppRequestFactory.class);
requestFactory.initialize(new SimpleEventBus());

ComposerRequest request = requestFactory
.getComposerRequest();

Request<ComposerProxy> req = request.findComposer(event
.getclickedItem().getValue());

req.fire(new Receiver<ComposerProxy>() {

public void onSuccess(ComposerProxy arg0) {

ComposerEditorContainer editorContainer = new
ComposerEditorContainer(
requestFactory, arg0);
editorContainer.edit(requestFactory
.getComposerRequest());
view.clear();
view.addWidget(editorContainer);

composerEditorContainer = editorContainer;
}
});

}
});


//Error that appears when saving for the second time
Caused by: java.lang.IllegalStateException: A request is already in
progress
at
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext.checkLocked(AbstractRequestContext.java:
960)
at
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext.editProxy(AbstractRequestContext.java:
510)
at
com.google.web.bindery.requestfactory.shared.impl.AbstractRequestContext.edit(AbstractRequestContext.java:
502)
at
com.google.test.client.editor.ComposerEditorContainer.save(ComposerEditorContainer.java:
58)
at com.google.test.client.presenter.BrowserDetailPresenter
$1.onSaveButtonClicked(BrowserDetailPresenter.java:48)
at
com.google.test.client.event.SaveButtonClickedEvent.dispatch(SaveButtonClickedEvent.java:
17)

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