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import { OutputStream } from "./OutputStream.js";
import { AsyncResult } from "./AsyncResult.js";
import { AsyncStatus } from "./AsyncStatus.js";
import { UserException } from "./UserException.js";
import { RetryException } from "./RetryException.js";
import { ReferenceMode } from "./ReferenceMode.js";
import { Ice as Ice_OperationMode } from "./OperationMode.js";
const { OperationMode } = Ice_OperationMode;
import {
DispatchException,
CloseConnectionException,
ConnectionClosedException,
CommunicatorDestroyedException,
ConnectionAbortedException,
FacetNotExistException,
FeatureNotSupportedException,
InvocationCanceledException,
InvocationTimeoutException,
MarshalException,
ObjectAdapterDestroyedException,
ObjectNotExistException,
OperationNotExistException,
RequestFailedException,
UnknownException,
UnknownLocalException,
UnknownUserException,
} from "./LocalExceptions.js";
import { LocalException } from "./LocalException.js";
import { Ice as Ice_Context } from "./Context.js";
const { ContextHelper } = Ice_Context;
import { Protocol } from "./Protocol.js";
import { Ice as Ice_BuiltinSequences } from "./BuiltinSequences.js";
const { StringSeqHelper } = Ice_BuiltinSequences;
import { InputStream } from "./InputStream.js";
import { Ice as Ice_Identity } from "./Identity.js";
const { Identity } = Ice_Identity;
import { Ice as Ice_ReplyStatus } from "./ReplyStatus.js";
const { ReplyStatus } = Ice_ReplyStatus;
export class OutgoingAsyncBase extends AsyncResult {
constructor(communicator, operation, proxy) {
super(communicator, operation, proxy);
this._os = new OutputStream(
Protocol.currentProtocolEncoding,
this._instance.defaultsAndOverrides().defaultFormat,
);
}
getOs() {
return this._os;
}
sent() {
this.markSent(true);
}
exception(ex) {
return this.markFinishedEx(ex);
}
}
export class ProxyOutgoingAsyncBase extends OutgoingAsyncBase {
constructor(prx, operation) {
super(prx.ice_getCommunicator(), operation, prx);
this._mode = null;
this._cnt = 0;
this._sent = false;
this._handler = null;
}
completedEx(ex) {
try {
const interval = this.handleRetryAfterException(ex);
this._instance.retryQueue().add(this, interval);
} catch (ex) {
this.markFinishedEx(ex);
}
}
retryException() {
try {
// It's important to let the retry queue do the retry. This is
// called from the connect request handler and the retry might
// require could end up waiting for the flush of the
// connection to be done.
this._proxy._requestHandlerCache.clearCachedRequestHandler(this._handler);
this._instance.retryQueue().add(this, 0);
} catch (ex) {
this.completedEx(ex);
}
}
retry() {
this.invokeImpl(false);
}
abort(ex) {
this.markFinishedEx(ex);
}
invokeImpl(userThread) {
try {
if (userThread) {
const invocationTimeout = this._proxy._getReference().getInvocationTimeout();
if (invocationTimeout > 0) {
this._timeoutToken = this._instance.timer().schedule(() => {
this.cancelWithException(new InvocationTimeoutException());
}, invocationTimeout);
}
}
while (true) {
try {
this._sent = false;
this._handler = this._proxy._requestHandlerCache.requestHandler;
if ((this._handler.sendAsyncRequest(this) & AsyncStatus.Sent) > 0 && userThread) {
this._sentSynchronously = true;
}
return; // We're done!
} catch (ex) {
if (ex instanceof RetryException) {
// Clear request handler and always retry
this._proxy._requestHandlerCache.clearCachedRequestHandler(this._handler);
} else {
const interval = this.handleRetryAfterException(ex);
if (interval > 0) {
this._instance.retryQueue().add(this, interval);
return;
}
}
}
}
} catch (ex) {
this.markFinishedEx(ex);
}
}
markSent(done) {
this._sent = true;
if (done) {
if (this._timeoutToken) {
this._instance.timer().cancel(this._timeoutToken);
}
}
super.markSent.call(this, done);
}
markFinishedEx(ex) {
if (this._timeoutToken) {
this._instance.timer().cancel(this._timeoutToken);
}
super.markFinishedEx.call(this, ex);
}
handleRetryAfterException(ex) {
// Clear the request handler
this._proxy._requestHandlerCache.clearCachedRequestHandler(this._handler);
// We only retry local exception.
//
// A CloseConnectionException indicates graceful server shutdown, and is therefore always repeatable without
// violating "at-most-once". That's because by sending a close connection message, the server guarantees that
// all outstanding requests can safely be repeated.
//
// An ObjectNotExistException can always be retried as well without violating "at-most-once" (see the
// implementation of the checkRetryAfterException method below for the reasons why it can be useful).
//
// If the request didn't get sent or if it's non-mutating or idempotent it can also always be retried if the
// retry count isn't reached.
if (
ex instanceof LocalException &&
(!this._sent ||
this._mode == OperationMode.Nonmutating ||
this._mode == OperationMode.Idempotent ||
ex instanceof CloseConnectionException ||
ex instanceof ObjectNotExistException)
) {
try {
return this.checkRetryAfterException(ex);
} catch (e) {
if (e instanceof CommunicatorDestroyedException) {
throw ex; // The communicator is already destroyed, so we cannot retry.
}
throw e;
}
} else {
throw ex; // Retry could break at-most-once semantics, don't retry.
}
}
checkRetryAfterException(ex) {
const ref = this._proxy._reference;
const instance = ref.getInstance();
const traceLevels = instance.traceLevels();
const logger = instance.initializationData().logger;
// We don't retry batch requests because the exception might have caused that all the requests batched with the
// connection to be aborted and we want the application to be notified.
if (ref.getMode() == ReferenceMode.ModeBatchOneway) {
throw ex;
}
// If it's a fixed proxy, retrying isn't useful as the proxy is tied to the connection and the request will
// fail with the exception.
if (ref.isFixed()) {
throw ex;
}
if (ex instanceof ObjectNotExistException) {
if (ref.getRouterInfo() != null && ex.operation == "ice_add_proxy") {
// If we have a router, an ObjectNotExistException with an operation name "ice_add_proxy" indicates to
// the client that the router isn't aware of the proxy (for example, because it was evicted by the
// router). In this case, we must *always* retry, so that the missing proxy is added to the router.
ref.getRouterInfo().clearCache(ref);
if (traceLevels.retry >= 1) {
logger.trace(traceLevels.retryCat, "retrying operation call to add proxy to router\n" + ex);
}
// We must always retry, so we don't look at the retry count.
return 0;
} else if (ref.isIndirect()) {
// We retry ObjectNotExistException if the reference is indirect.
if (ref.isWellKnown()) {
const li = ref.getLocatorInfo();
if (li !== null) {
li.clearCache(ref);
}
}
} else {
// For all other cases, we don't retry ObjectNotExistException.
throw ex;
}
} else if (ex instanceof RequestFailedException) {
throw ex;
}
// There is no point in retrying an operation that resulted in a MarshalException. This must have been raised
// locally (because if it happened in a server it would result in an UnknownLocalException instead), which
// means there was a problem in this process that will not change if we try again.
//
// A likely cause for a MarshalException is exceeding the maximum message size. For example, a client
// can attempt to send a message that exceeds the maximum memory size, or accumulate enough batch requests
// without flushing before the maximum size is reached.
//
// This latter case is especially problematic, because if we were to retry a batch request after a
// MarshalException, we would in fact silently discard the accumulated requests and allow new batch requests to
// accumulate. If the subsequent batched requests do not exceed the maximum message size, it appears to the
// client that all of the batched requests were accepted, when in reality only the last few are actually sent.
if (ex instanceof MarshalException) {
throw ex;
}
// Don't retry if the communicator is destroyed, object adapter is destroyed, or connection is manually closed.
if (
ex instanceof CommunicatorDestroyedException ||
ex instanceof ObjectAdapterDestroyedException ||
(ex instanceof ConnectionAbortedException && ex.closedByApplication) ||
(ex instanceof ConnectionClosedException && ex.closedByApplication)
) {
throw ex;
}
// Don't retry invocation timeouts.
if (ex instanceof InvocationTimeoutException || ex instanceof InvocationCanceledException) {
throw ex;
}
++this._cnt;
console.assert(this._cnt > 0);
const retryIntervals = instance._retryIntervals;
let interval = 0;
if (this._cnt == retryIntervals.length + 1 && ex instanceof CloseConnectionException) {
// A close connection exception is always retried at least once, even if the retry limit is reached.
interval = 0;
} else if (this._cnt > retryIntervals.length) {
if (traceLevels.retry >= 1) {
logger.trace(
traceLevels.retryCat,
"cannot retry operation call because retry limit has been exceeded\n" + ex,
);
}
throw ex;
} else {
interval = retryIntervals[this._cnt - 1];
}
if (traceLevels.retry >= 1) {
let s = "retrying operation call";
if (interval > 0) {
s += " in " + interval + "ms";
}
s += " because of exception\n" + ex;
logger.trace(traceLevels.retryCat, s);
}
return interval;
}
}
export class OutgoingAsync extends ProxyOutgoingAsyncBase {
constructor(prx, operation, completed) {
super(prx, operation);
if (prx) {
this._encoding = Protocol.getCompatibleEncoding(this._proxy._getReference().getEncoding());
this._completed = completed;
}
}
prepare(mode, ctx) {
const protocol = this._proxy._getReference().getProtocol();
if (protocol.major != Protocol.currentProtocol.major) {
throw new FeatureNotSupportedException(
`Cannot send request using protocol version ${protocol.major}.${protocol.minor}`,
);
}
this._mode = mode;
if (ctx === null) {
ctx = OutgoingAsync._emptyContext;
}
if (this._proxy.ice_isBatchOneway()) {
this._proxy._reference.batchRequestQueue.prepareBatchRequest(this._os);
} else {
this._os.writeBlob(Protocol.requestHdr);
}
const ref = this._proxy._getReference();
ref.getIdentity()._write(this._os);
//
// For compatibility with the old FacetPath.
//
const facet = ref.getFacet();
if (facet === null || facet.length === 0) {
StringSeqHelper.write(this._os, null);
} else {
StringSeqHelper.write(this._os, [facet]);
}
this._os.writeString(this._operation);
this._os.writeByte(mode.value);
if (ctx !== undefined) {
if (ctx !== null && !(ctx instanceof Map)) {
throw new RangeError("illegal context value, expecting null or Map");
}
//
// Explicit context
//
ContextHelper.write(this._os, ctx);
} else {
//
// Implicit context
//
const implicitContext = ref.getInstance().getImplicitContext();
const prxContext = ref.getContext();
if (implicitContext === null) {
ContextHelper.write(this._os, prxContext);
} else {
implicitContext.write(prxContext, this._os);
}
}
}
sent() {
this.markSent(!this._proxy.ice_isTwoway());
}
invokeRemote(connection, response) {
return connection.sendAsyncRequest(this, response, 0);
}
abort(ex) {
if (this._proxy.ice_isBatchOneway()) {
this._proxy._reference.batchRequestQueue.abortBatchRequest(this._os);
}
super.abort(ex);
}
invoke() {
if (this._proxy.ice_isBatchOneway()) {
this._sentSynchronously = true;
this._proxy._reference.batchRequestQueue.finishBatchRequest(this._os, this._proxy, this._operation);
this.markFinished(true);
return;
}
//
// NOTE: invokeImpl doesn't throw so this can be called from the
// try block with the catch block calling abort() in case of an
// exception.
//
this.invokeImpl(true); // userThread = true
}
completed(istr) {
console.assert(this._proxy.ice_isTwoway()); // Can only be called for twoways.
try {
if (this._is === null) {
// _is can already be initialized if the invocation is retried
this._is = new InputStream(this._instance, Protocol.currentProtocolEncoding);
}
this._is.swap(istr);
// We can't (shouldn't) use the generated code to unmarshal a possibly unknown reply status.
// This creates a new enumerator (e.g. "18": 18) if one doesn't exist yet.
const replyStatus = ReplyStatus.valueOf(this._is.readByte());
switch (replyStatus) {
case ReplyStatus.Ok:
case ReplyStatus.UserException:
break;
case ReplyStatus.ObjectNotExist:
case ReplyStatus.FacetNotExist:
case ReplyStatus.OperationNotExist: {
const id = new Identity();
id._read(this._is);
//
// For compatibility with the old facet path.
//
const facetPath = StringSeqHelper.read(this._is);
let facet;
if (facetPath.length > 0) {
if (facetPath.length > 1) {
throw new MarshalException(
`Received invalid facet path with ${facetPath.length} elements.`,
);
}
facet = facetPath[0];
} else {
facet = "";
}
const operation = this._is.readString();
switch (replyStatus) {
case ReplyStatus.ObjectNotExist:
throw new ObjectNotExistException(id, facet, operation);
case ReplyStatus.FacetNotExist:
throw new FacetNotExistException(id, facet, operation);
default:
throw new OperationNotExistException(id, facet, operation);
}
}
default: {
const message = this._is.readString();
switch (replyStatus) {
case ReplyStatus.UnknownException:
throw new UnknownException(message);
case ReplyStatus.UnknownLocalException:
throw new UnknownLocalException(message);
case ReplyStatus.UnknownUserException:
throw new UnknownUserException(message);
default:
throw new DispatchException(replyStatus, message);
}
}
}
this.markFinished(replyStatus == ReplyStatus.Ok, this._completed);
} catch (ex) {
this.completedEx(ex);
}
}
startWriteParams(format) {
this._os.startEncapsulation(this._encoding, format);
return this._os;
}
endWriteParams() {
this._os.endEncapsulation();
}
writeEmptyParams() {
this._os.writeEmptyEncapsulation(this._encoding);
}
startReadParams() {
this._is.startEncapsulation();
return this._is;
}
endReadParams() {
this._is.endEncapsulation();
}
readEmptyParams() {
this._is.skipEmptyEncapsulation();
}
throwUserException() {
console.assert((this._state & AsyncResult.Done) !== 0);
if ((this._state & AsyncResult.Ok) === 0) {
try {
this._is.startEncapsulation();
this._is.throwException();
} catch (ex) {
if (ex instanceof UserException) {
this._is.endEncapsulation();
}
throw ex;
}
}
}
}
// TODO: We should use an immutable map.
OutgoingAsync._emptyContext = new Map(); // Map<string, string>
export class ProxyFlushBatch extends ProxyOutgoingAsyncBase {
constructor(prx, operation) {
super(prx, operation);
this._batchRequestNum = prx._reference.batchRequestQueue.swap(this._os);
}
invokeRemote(connection, response) {
if (this._batchRequestNum === 0) {
this.sent();
return AsyncStatus.Sent;
}
return connection.sendAsyncRequest(this, response, this._batchRequestNum);
}
invoke() {
const protocol = this._proxy._getReference().getProtocol();
if (protocol.major != Protocol.currentProtocol.major) {
throw new FeatureNotSupportedException(
`Cannot send request using protocol version ${protocol.major}.${protocol.minor}`,
);
}
this.invokeImpl(true); // userThread = true
}
}
export class ProxyGetConnection extends ProxyOutgoingAsyncBase {
invokeRemote(connection) {
this.markFinished(true, r => r.resolve(connection));
return AsyncStatus.Sent;
}
invoke() {
this.invokeImpl(true); // userThread = true
}
}
export class ConnectionFlushBatch extends OutgoingAsyncBase {
constructor(connection, communicator, operation) {
super(communicator, operation);
this._connection = connection;
}
invoke() {
try {
const batchRequestNum = this._connection.getBatchRequestQueue().swap(this._os);
let status;
if (batchRequestNum === 0) {
this.sent();
status = AsyncStatus.Sent;
} else {
status = this._connection.sendAsyncRequest(this, false, batchRequestNum);
}
if ((status & AsyncStatus.Sent) > 0) {
this._sentSynchronously = true;
}
} catch (ex) {
this.markFinishedEx(ex);
}
}
}
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