nats
Version:
Node.js client for NATS, a lightweight, high-performance cloud native messaging system
84 lines • 3.51 kB
JavaScript
;
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DirectMsgImpl = exports.DirectStreamAPIImpl = void 0;
/*
* Copyright 2022 The NATS 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.
*/
const jsbaseclient_api_1 = require("./jsbaseclient_api");
const types_1 = require("./types");
const jsutil_1 = require("./jsutil");
class DirectStreamAPIImpl extends jsbaseclient_api_1.BaseApiClient {
constructor(nc, opts) {
super(nc, opts);
}
getMessage(stream, query) {
return __awaiter(this, void 0, void 0, function* () {
(0, jsutil_1.validateStreamName)(stream);
// if doing a last_by_subj request, we append the subject
// this allows last_by_subj to be subject to permissions (KV)
let qq = query;
const { last_by_subj } = qq;
if (last_by_subj) {
qq = null;
}
const payload = qq ? this.jc.encode(qq) : types_1.Empty;
const pre = this.opts.apiPrefix || "$JS.API";
const subj = last_by_subj
? `${pre}.DIRECT.GET.${stream}.${last_by_subj}`
: `${pre}.DIRECT.GET.${stream}`;
const r = yield this.nc.request(subj, payload);
// response is not a JS.API response
const err = (0, jsutil_1.checkJsError)(r);
if (err) {
return Promise.reject(err);
}
const dm = new DirectMsgImpl(r);
return Promise.resolve(dm);
});
}
}
exports.DirectStreamAPIImpl = DirectStreamAPIImpl;
class DirectMsgImpl {
constructor(m) {
if (!m.headers) {
throw new Error("headers expected");
}
this.data = m.data;
this.header = m.headers;
}
get subject() {
return this.header.get(types_1.DirectMsgHeaders.Subject);
}
get seq() {
const v = this.header.get(types_1.DirectMsgHeaders.Sequence);
return typeof v === "string" ? parseInt(v) : 0;
}
get time() {
return new Date(Date.parse(this.header.get(types_1.DirectMsgHeaders.TimeStamp)));
}
get stream() {
return this.header.get(types_1.DirectMsgHeaders.Stream);
}
}
exports.DirectMsgImpl = DirectMsgImpl;
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