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DataFlowService.js
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171 lines (157 loc) · 5.63 KB
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/* Copyright© 2000 - 2025 SuperMap Software Co.Ltd. All rights reserved.
* This program are made available under the terms of the Apache License, Version 2.0
* which accompanies this distribution and is available at http://www.apache.org/licenses/LICENSE-2.0.html.*/
import '../core/Base';
import {ServiceBase} from './ServiceBase';
import { DataFlowService as DataFlow } from '@supermapgis/iclient-common/iServer/DataFlowService';
/**
* @class DataFlowService
* @category iServer DataFlow
* @classdesc 数据流服务类。用于实现客户端与服务器之间实现低延迟和实时数据传输。数据流服务采用 WebSocket 协议，支持全双工、双向式通信。
* 服务器可将流数据服务的分析处理结果作为数据来源向客户端广播，客户端与数据流服务建立连接后，即可自动接收服务器广播的数据。
* @modulecategory Services
* @extends {ServiceBase}
* @example
* new DataFlowService(url)
* .queryChart(param,function(result){
* //doSomething
* })
* @param {string} url - 服务地址。
* @param {Object} options - 参数。
* @param {GeoJSONObject} [options.geometry] - 指定几何范围，只有在该范围内的要素才能被订阅。
* @param {Object} [options.excludeField] - 排除字段。
* @param {boolean} [options.crossOrigin] - 是否允许跨域请求。
* @param {Object} [options.headers] - 请求头。
* @fires DataFlowService#broadcastSocketConnected
* @fires DataFlowService#broadcastSocketError
* @fires DataFlowService#broadcastFailed
* @fires DataFlowService#broadcastSucceeded
* @fires DataFlowService#subscribeSocketError
* @fires DataFlowService#messageSucceeded
* @fires DataFlowService#setFilterParamSucceeded
* @usage
*/
export class DataFlowService extends ServiceBase {
constructor(url, options) {
options = options || {};
if (options.projection) {
options.prjCoordSys = options.projection;
}
super(url, options);
this.dataFlow = new DataFlow(url, options);
/**
* @event DataFlowService#broadcastSocketConnected
* @description broadcast Socket 连接成功。
*/
/**
* @event DataFlowService#broadcastSocketError
* @description broadcast Socket 连接失败。
*/
/**
* @event DataFlowService#broadcastFailed
* @description 广播失败。
*/
/**
* @event DataFlowService#broadcastSucceeded
* @description 广播成功。
*/
/**
* @event DataFlowService#subscribeSocketConnected
* @description 订阅数据连接成功。
*/
/**
* @event DataFlowService#subscribeSocketError
* @description 订阅数据连接失败。
*/
/**
* @event DataFlowService#messageSucceeded
* @description 获取信息成功。
*/
/**
* @event DataFlowService#setFilterParamSucceeded
* @description 设置过滤参数成功。
*/
this.dataFlow.events.on({
"broadcastSocketConnected": this._defaultEvent,
"broadcastSocketError": this._defaultEvent,
"broadcastFailed": this._defaultEvent,
"broadcastSucceeded": this._defaultEvent,
"subscribeSocketConnected": this._defaultEvent,
"subscribeSocketError": this._defaultEvent,
"messageSucceeded": this._defaultEvent,
"setFilterParamSucceeded": this._defaultEvent,
scope: this
});
var me = this;
me.on('subscribeSocketConnected', function (e) {
/**
* @event DataFlowService#subscribesucceeded
* @description 数据流服务订阅成功后触发。
* @property {Object} e - 事件对象。
*/
me.fire('subscribesucceeded', e);
})
}
/**
* @function DataFlowService.prototype.initBroadcast
* @description 初始化广播。
* @returns {DataFlowService} - 数据流服务。
*/
initBroadcast() {
this.dataFlow.initBroadcast();
return this;
}
/**
* @function DataFlowService.prototype.broadcast
* @description 加载广播数据。
* @param {JSONObject} obj - 要素数据。
*/
broadcast(obj) {
this.dataFlow.broadcast(obj);
}
/**
* @function DataFlowService.prototype.initSubscribe
* @description 初始化订阅数据。
*/
initSubscribe() {
this.dataFlow.initSubscribe();
return this;
}
/**
* @function DataFlowService.prototype.setExcludeField
* @description 设置排除字段。
* @param {Object} excludeField - 排除字段。
*/
setExcludeField(excludeField) {
this.dataFlow.setExcludeField(excludeField);
this.options.excludeField = excludeField;
return this;
}
/**
* @function DataFlowService.prototype.setGeometry
* @description 设置添加的几何要素数据。
* @param {GeoJSONObject} geometry - 指定几何范围，只有在该范围内的要素才能被订阅。
*/
setGeometry(geometry) {
this.dataFlow.setGeometry(geometry);
this.options.geometry = geometry;
return this;
}
/**
* @function DataFlowService.prototype.unSubscribe
* @description 结束订阅数据。
*/
unSubscribe() {
this.dataFlow.unSubscribe();
}
/**
* @function DataFlowService.prototype.unBroadcast
* @description 结束加载广播。
*/
unBroadcast() {
this.dataFlow.unBroadcast();
}
_defaultEvent(e) {
this.fire(e.eventType || e.type, e);
}
}