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Просмотр файла: resolving-call.js
"use strict";
/*
* Copyright 2022 gRPC authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.ResolvingCall = void 0;
const constants_1 = require("./constants");
const deadline_1 = require("./deadline");
const metadata_1 = require("./metadata");
const logging = require("./logging");
const control_plane_status_1 = require("./control-plane-status");
const TRACER_NAME = 'resolving_call';
class ResolvingCall {
constructor(channel, method, options, filterStackFactory, credentials, callNumber) {
this.channel = channel;
this.method = method;
this.filterStackFactory = filterStackFactory;
this.credentials = credentials;
this.callNumber = callNumber;
this.child = null;
this.readPending = false;
this.pendingMessage = null;
this.pendingHalfClose = false;
this.ended = false;
this.readFilterPending = false;
this.writeFilterPending = false;
this.pendingChildStatus = null;
this.metadata = null;
this.listener = null;
this.statusWatchers = [];
this.deadlineTimer = setTimeout(() => { }, 0);
this.filterStack = null;
this.deadline = options.deadline;
this.host = options.host;
if (options.parentCall) {
if (options.flags & constants_1.Propagate.CANCELLATION) {
options.parentCall.on('cancelled', () => {
this.cancelWithStatus(constants_1.Status.CANCELLED, 'Cancelled by parent call');
});
}
if (options.flags & constants_1.Propagate.DEADLINE) {
this.trace('Propagating deadline from parent: ' + options.parentCall.getDeadline());
this.deadline = deadline_1.minDeadline(this.deadline, options.parentCall.getDeadline());
}
}
this.trace('Created');
this.runDeadlineTimer();
}
trace(text) {
logging.trace(constants_1.LogVerbosity.DEBUG, TRACER_NAME, '[' + this.callNumber + '] ' + text);
}
runDeadlineTimer() {
clearTimeout(this.deadlineTimer);
this.trace('Deadline: ' + this.deadline);
if (this.deadline !== Infinity) {
const timeout = deadline_1.getRelativeTimeout(this.deadline);
this.trace('Deadline will be reached in ' + timeout + 'ms');
const handleDeadline = () => {
this.cancelWithStatus(constants_1.Status.DEADLINE_EXCEEDED, 'Deadline exceeded');
};
if (timeout <= 0) {
process.nextTick(handleDeadline);
}
else {
this.deadlineTimer = setTimeout(handleDeadline, timeout);
}
}
}
outputStatus(status) {
if (!this.ended) {
this.ended = true;
if (!this.filterStack) {
this.filterStack = this.filterStackFactory.createFilter();
}
const filteredStatus = this.filterStack.receiveTrailers(status);
this.trace('ended with status: code=' + filteredStatus.code + ' details="' + filteredStatus.details + '"');
this.statusWatchers.forEach(watcher => watcher(filteredStatus));
process.nextTick(() => {
var _a;
(_a = this.listener) === null || _a === void 0 ? void 0 : _a.onReceiveStatus(filteredStatus);
});
}
}
sendMessageOnChild(context, message) {
if (!this.child) {
throw new Error('sendMessageonChild called with child not populated');
}
const child = this.child;
this.writeFilterPending = true;
this.filterStack.sendMessage(Promise.resolve({ message: message, flags: context.flags })).then((filteredMessage) => {
this.writeFilterPending = false;
child.sendMessageWithContext(context, filteredMessage.message);
if (this.pendingHalfClose) {
child.halfClose();
}
}, (status) => {
this.cancelWithStatus(status.code, status.details);
});
}
getConfig() {
if (this.ended) {
return;
}
if (!this.metadata || !this.listener) {
throw new Error('getConfig called before start');
}
const configResult = this.channel.getConfig(this.method, this.metadata);
if (configResult.type === 'NONE') {
this.channel.queueCallForConfig(this);
return;
}
else if (configResult.type === 'ERROR') {
if (this.metadata.getOptions().waitForReady) {
this.channel.queueCallForConfig(this);
}
else {
this.outputStatus(configResult.error);
}
return;
}
// configResult.type === 'SUCCESS'
const config = configResult.config;
if (config.status !== constants_1.Status.OK) {
const { code, details } = control_plane_status_1.restrictControlPlaneStatusCode(config.status, 'Failed to route call to method ' + this.method);
this.outputStatus({
code: code,
details: details,
metadata: new metadata_1.Metadata()
});
return;
}
if (config.methodConfig.timeout) {
const configDeadline = new Date();
configDeadline.setSeconds(configDeadline.getSeconds() + config.methodConfig.timeout.seconds);
configDeadline.setMilliseconds(configDeadline.getMilliseconds() +
config.methodConfig.timeout.nanos / 1000000);
this.deadline = deadline_1.minDeadline(this.deadline, configDeadline);
this.runDeadlineTimer();
}
this.filterStackFactory.push(config.dynamicFilterFactories);
this.filterStack = this.filterStackFactory.createFilter();
this.filterStack.sendMetadata(Promise.resolve(this.metadata)).then(filteredMetadata => {
this.child = this.channel.createInnerCall(config, this.method, this.host, this.credentials, this.deadline);
this.child.start(filteredMetadata, {
onReceiveMetadata: metadata => {
this.listener.onReceiveMetadata(this.filterStack.receiveMetadata(metadata));
},
onReceiveMessage: message => {
this.readFilterPending = true;
this.filterStack.receiveMessage(message).then(filteredMesssage => {
this.readFilterPending = false;
this.listener.onReceiveMessage(filteredMesssage);
if (this.pendingChildStatus) {
this.outputStatus(this.pendingChildStatus);
}
}, (status) => {
this.cancelWithStatus(status.code, status.details);
});
},
onReceiveStatus: status => {
if (this.readFilterPending) {
this.pendingChildStatus = status;
}
else {
this.outputStatus(status);
}
}
});
if (this.readPending) {
this.child.startRead();
}
if (this.pendingMessage) {
this.sendMessageOnChild(this.pendingMessage.context, this.pendingMessage.message);
}
else if (this.pendingHalfClose) {
this.child.halfClose();
}
}, (status) => {
this.outputStatus(status);
});
}
reportResolverError(status) {
var _a;
if ((_a = this.metadata) === null || _a === void 0 ? void 0 : _a.getOptions().waitForReady) {
this.channel.queueCallForConfig(this);
}
else {
this.outputStatus(status);
}
}
cancelWithStatus(status, details) {
var _a;
this.trace('cancelWithStatus code: ' + status + ' details: "' + details + '"');
(_a = this.child) === null || _a === void 0 ? void 0 : _a.cancelWithStatus(status, details);
this.outputStatus({ code: status, details: details, metadata: new metadata_1.Metadata() });
}
getPeer() {
var _a, _b;
return (_b = (_a = this.child) === null || _a === void 0 ? void 0 : _a.getPeer()) !== null && _b !== void 0 ? _b : this.channel.getTarget();
}
start(metadata, listener) {
this.trace('start called');
this.metadata = metadata.clone();
this.listener = listener;
this.getConfig();
}
sendMessageWithContext(context, message) {
this.trace('write() called with message of length ' + message.length);
if (this.child) {
this.sendMessageOnChild(context, message);
}
else {
this.pendingMessage = { context, message };
}
}
startRead() {
this.trace('startRead called');
if (this.child) {
this.child.startRead();
}
else {
this.readPending = true;
}
}
halfClose() {
this.trace('halfClose called');
if (this.child && !this.writeFilterPending) {
this.child.halfClose();
}
else {
this.pendingHalfClose = true;
}
}
setCredentials(credentials) {
this.credentials = this.credentials.compose(credentials);
}
addStatusWatcher(watcher) {
this.statusWatchers.push(watcher);
}
getCallNumber() {
return this.callNumber;
}
}
exports.ResolvingCall = ResolvingCall;
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