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|
//
// Copyright (c) ZeroC, Inc. All rights reserved.
//
const Ice = require("../Ice/ModuleRegistry").Ice;
Ice._ModuleRegistry.require(module,
[
"../Ice/AsyncStatus",
"../Ice/ConnectionRequestHandler",
"../Ice/Debug",
"../Ice/RetryException",
"../Ice/ReferenceMode",
"../Ice/Exception"
]);
const AsyncStatus = Ice.AsyncStatus;
const ConnectionRequestHandler = Ice.ConnectionRequestHandler;
const Debug = Ice.Debug;
const RetryException = Ice.RetryException;
const ReferenceMode = Ice.ReferenceMode;
const LocalException = Ice.LocalException;
class ConnectRequestHandler
{
constructor(ref, proxy)
{
this._reference = ref;
this._response = ref.getMode() === ReferenceMode.ModeTwoway;
this._proxy = proxy;
this._proxies = [];
this._initialized = false;
this._connection = null;
this._exception = null;
this._requests = [];
}
connect(proxy)
{
if(!this.initialized())
{
this._proxies.push(proxy);
}
return this._requestHandler ? this._requestHandler : this;
}
update(previousHandler, newHandler)
{
return previousHandler === this ? newHandler : this;
}
sendAsyncRequest(out)
{
if(!this._initialized)
{
out.cancelable(this); // This will throw if the request is canceled
}
if(!this.initialized())
{
this._requests.push(out);
return AsyncStatus.Queued;
}
return out.invokeRemote(this._connection, this._response);
}
asyncRequestCanceled(out, ex)
{
if(this._exception !== null)
{
return; // The request has been notified of a failure already.
}
if(!this.initialized())
{
for(let i = 0; i < this._requests.length; i++)
{
if(this._requests[i] === out)
{
out.completedEx(ex);
this._requests.splice(i, 1);
return;
}
}
Debug.assert(false); // The request has to be queued if it timed out and we're not initialized yet.
}
this._connection.asyncRequestCanceled(out, ex);
}
getReference()
{
return this._reference;
}
getConnection()
{
if(this._exception !== null)
{
throw this._exception;
}
else
{
return this._connection;
}
}
//
// Implementation of Reference_GetConnectionCallback
//
setConnection(connection)
{
Debug.assert(this._exception === null && this._connection === null);
this._connection = connection;
//
// If this proxy is for a non-local object, and we are using a router, then
// add this proxy to the router info object.
//
const ri = this._reference.getRouterInfo();
if(ri !== null)
{
ri.addProxy(this._proxy).then(
//
// The proxy was added to the router
// info, we're now ready to send the
// queued requests.
//
() => this.flushRequests(),
ex => this.setException(ex));
return; // The request handler will be initialized once addProxy completes.
}
//
// We can now send the queued requests.
//
this.flushRequests();
}
setException(ex)
{
Debug.assert(!this._initialized && this._exception === null);
this._exception = ex;
this._proxies.length = 0;
this._proxy = null; // Break cyclic reference count.
//
// NOTE: remove the request handler *before* notifying the
// requests that the connection failed. It's important to ensure
// that future invocations will obtain a new connect request
// handler once invocations are notified.
//
try
{
this._reference.getInstance().requestHandlerFactory().removeRequestHandler(this._reference, this);
}
catch(exc)
{
// Ignore
}
this._requests.forEach(request =>
{
if(request !== null)
{
request.completedEx(this._exception);
}
});
this._requests.length = 0;
}
initialized()
{
if(this._initialized)
{
Debug.assert(this._connection !== null);
return true;
}
else if(this._exception !== null)
{
if(this._connection !== null)
{
//
// Only throw if the connection didn't get established. If
// it died after being established, we allow the caller to
// retry the connection establishment by not throwing here
// (the connection will throw RetryException).
//
return true;
}
throw this._exception;
}
else
{
return this._initialized;
}
}
flushRequests()
{
Debug.assert(this._connection !== null && !this._initialized);
let exception = null;
this._requests.forEach(request =>
{
try
{
request.invokeRemote(this._connection, this._response);
}
catch(ex)
{
if(ex instanceof RetryException)
{
exception = ex.inner;
// Remove the request handler before retrying.
this._reference.getInstance().requestHandlerFactory().removeRequestHandler(this._reference, this);
request.retryException(ex.inner);
}
else
{
Debug.assert(ex instanceof LocalException);
exception = ex;
request.out.completedEx(ex);
}
}
});
this._requests.length = 0;
if(this._reference.getCacheConnection() && exception === null)
{
this._requestHandler = new ConnectionRequestHandler(this._reference, this._connection);
this._proxies.forEach(proxy => proxy._updateRequestHandler(this, this._requestHandler));
}
Debug.assert(!this._initialized);
this._exception = exception;
this._initialized = this._exception === null;
//
// Only remove once all the requests are flushed to
// guarantee serialization.
//
this._reference.getInstance().requestHandlerFactory().removeRequestHandler(this._reference, this);
this._proxies.length = 0;
this._proxy = null; // Break cyclic reference count.
}
}
Ice.ConnectRequestHandler = ConnectRequestHandler;
module.exports.Ice = Ice;
|
