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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "ServiceWorkerJob.h"
#include "nsProxyRelease.h"
#include "nsThreadUtils.h"
#include "Workers.h"
#include "ServiceWorkerManager.h"
namespace mozilla {
namespace dom {
namespace workers {
ServiceWorkerJob::Type
ServiceWorkerJob::GetType() const
{
return mType;
}
ServiceWorkerJob::State
ServiceWorkerJob::GetState() const
{
return mState;
}
bool
ServiceWorkerJob::Canceled() const
{
return mCanceled;
}
bool
ServiceWorkerJob::ResultCallbacksInvoked() const
{
return mResultCallbacksInvoked;
}
bool
ServiceWorkerJob::IsEquivalentTo(ServiceWorkerJob* aJob) const
{
AssertIsOnMainThread();
MOZ_ASSERT(aJob);
return mType == aJob->mType &&
mScope.Equals(aJob->mScope) &&
mScriptSpec.Equals(aJob->mScriptSpec) &&
mPrincipal->Equals(aJob->mPrincipal);
}
void
ServiceWorkerJob::AppendResultCallback(Callback* aCallback)
{
AssertIsOnMainThread();
MOZ_DIAGNOSTIC_ASSERT(mState != State::Finished);
MOZ_DIAGNOSTIC_ASSERT(aCallback);
MOZ_DIAGNOSTIC_ASSERT(mFinalCallback != aCallback);
MOZ_ASSERT(!mResultCallbackList.Contains(aCallback));
MOZ_DIAGNOSTIC_ASSERT(!mResultCallbacksInvoked);
mResultCallbackList.AppendElement(aCallback);
}
void
ServiceWorkerJob::StealResultCallbacksFrom(ServiceWorkerJob* aJob)
{
AssertIsOnMainThread();
MOZ_ASSERT(aJob);
MOZ_ASSERT(aJob->mState == State::Initial);
// Take the callbacks from the other job immediately to avoid the
// any possibility of them existing on both jobs at once.
nsTArray<RefPtr<Callback>> callbackList;
callbackList.SwapElements(aJob->mResultCallbackList);
for (RefPtr<Callback>& callback : callbackList) {
// Use AppendResultCallback() so that assertion checking is performed on
// each callback.
AppendResultCallback(callback);
}
}
void
ServiceWorkerJob::Start(Callback* aFinalCallback)
{
AssertIsOnMainThread();
MOZ_DIAGNOSTIC_ASSERT(!mCanceled);
MOZ_DIAGNOSTIC_ASSERT(aFinalCallback);
MOZ_DIAGNOSTIC_ASSERT(!mFinalCallback);
MOZ_ASSERT(!mResultCallbackList.Contains(aFinalCallback));
mFinalCallback = aFinalCallback;
MOZ_DIAGNOSTIC_ASSERT(mState == State::Initial);
mState = State::Started;
nsCOMPtr<nsIRunnable> runnable =
NewRunnableMethod(this, &ServiceWorkerJob::AsyncExecute);
// We may have to wait for the PBackground actor to be initialized
// before proceeding. We should always be able to get a ServiceWorkerManager,
// however, since Start() should not be called during shutdown.
RefPtr<ServiceWorkerManager> swm = ServiceWorkerManager::GetInstance();
if (!swm) {
// browser shutdown
return;
}
if (!swm->HasBackgroundActor()) {
// waiting to initialize
swm->AppendPendingOperation(runnable);
return;
}
// Otherwise start asynchronously. We should never run a job synchronously.
MOZ_ALWAYS_TRUE(NS_SUCCEEDED(
NS_DispatchToMainThread(runnable.forget())));
}
void
ServiceWorkerJob::Cancel()
{
AssertIsOnMainThread();
MOZ_ASSERT(!mCanceled);
mCanceled = true;
}
ServiceWorkerJob::ServiceWorkerJob(Type aType,
nsIPrincipal* aPrincipal,
const nsACString& aScope,
const nsACString& aScriptSpec)
: mType(aType)
, mPrincipal(aPrincipal)
, mScope(aScope)
, mScriptSpec(aScriptSpec)
, mState(State::Initial)
, mCanceled(false)
, mResultCallbacksInvoked(false)
{
AssertIsOnMainThread();
MOZ_ASSERT(mPrincipal);
MOZ_ASSERT(!mScope.IsEmpty());
// Some job types may have an empty script spec
}
ServiceWorkerJob::~ServiceWorkerJob()
{
AssertIsOnMainThread();
// Jobs must finish or never be started. Destroying an actively running
// job is an error.
MOZ_ASSERT(mState != State::Started);
MOZ_ASSERT_IF(mState == State::Finished, mResultCallbacksInvoked);
}
void
ServiceWorkerJob::InvokeResultCallbacks(ErrorResult& aRv)
{
AssertIsOnMainThread();
MOZ_DIAGNOSTIC_ASSERT(mState == State::Started);
MOZ_DIAGNOSTIC_ASSERT(!mResultCallbacksInvoked);
mResultCallbacksInvoked = true;
nsTArray<RefPtr<Callback>> callbackList;
callbackList.SwapElements(mResultCallbackList);
for (RefPtr<Callback>& callback : callbackList) {
// The callback might consume an exception on the ErrorResult, so we need
// to clone in order to maintain the error for the next callback.
ErrorResult rv;
aRv.CloneTo(rv);
callback->JobFinished(this, rv);
// The callback might not consume the error.
rv.SuppressException();
}
}
void
ServiceWorkerJob::InvokeResultCallbacks(nsresult aRv)
{
ErrorResult converted(aRv);
InvokeResultCallbacks(converted);
}
void
ServiceWorkerJob::Finish(ErrorResult& aRv)
{
AssertIsOnMainThread();
// Avoid double-completion because it can result on operating on cleaned
// up data. This should not happen, though, so also assert to try to
// narrow down the causes.
MOZ_DIAGNOSTIC_ASSERT(mState == State::Started);
if (mState != State::Started) {
return;
}
// Ensure that we only surface SecurityErr, TypeErr or InvalidStateErr to script.
if (aRv.Failed() && !aRv.ErrorCodeIs(NS_ERROR_DOM_SECURITY_ERR) &&
!aRv.ErrorCodeIs(NS_ERROR_DOM_TYPE_ERR) &&
!aRv.ErrorCodeIs(NS_ERROR_DOM_INVALID_STATE_ERR)) {
// Remove the old error code so we can replace it with a TypeError.
aRv.SuppressException();
NS_ConvertUTF8toUTF16 scriptSpec(mScriptSpec);
NS_ConvertUTF8toUTF16 scope(mScope);
// Throw the type error with a generic error message.
aRv.ThrowTypeError<MSG_SW_INSTALL_ERROR>(scriptSpec, scope);
}
// The final callback may drop the last ref to this object.
RefPtr<ServiceWorkerJob> kungFuDeathGrip = this;
if (!mResultCallbacksInvoked) {
InvokeResultCallbacks(aRv);
}
mState = State::Finished;
MOZ_DIAGNOSTIC_ASSERT(mFinalCallback);
if (mFinalCallback) {
mFinalCallback->JobFinished(this, aRv);
mFinalCallback = nullptr;
}
// The callback might not consume the error.
aRv.SuppressException();
// Async release this object to ensure that our caller methods complete
// as well.
NS_ReleaseOnMainThread(kungFuDeathGrip.forget(), true /* always proxy */);
}
void
ServiceWorkerJob::Finish(nsresult aRv)
{
ErrorResult converted(aRv);
Finish(converted);
}
} // namespace workers
} // namespace dom
} // namespace mozilla
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