@orbit/coordinator
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A coordinator and set of coordination strategies for managing data flow and keeping @orbit/data sources in sync.
128 lines • 16.8 kB
JavaScript
import { Orbit } from '@orbit/core';
import { objectValues } from '@orbit/utils';
const { assert } = Orbit;
export var LogLevel;
(function (LogLevel) {
LogLevel[LogLevel["None"] = 0] = "None";
LogLevel[LogLevel["Errors"] = 1] = "Errors";
LogLevel[LogLevel["Warnings"] = 2] = "Warnings";
LogLevel[LogLevel["Info"] = 3] = "Info";
})(LogLevel || (LogLevel = {}));
/**
* The Coordinator class manages a set of sources to which it applies a set of
* coordination strategies.
*/
export class Coordinator {
constructor(options = {}) {
this._sources = {};
this._strategies = {};
if (options.sources) {
options.sources.forEach((source) => this.addSource(source));
}
if (options.strategies) {
options.strategies.forEach((strategy) => this.addStrategy(strategy));
}
this._defaultActivationOptions = options.defaultActivationOptions || {};
if (this._defaultActivationOptions.logLevel === undefined) {
this._defaultActivationOptions.logLevel = LogLevel.Info;
}
}
addSource(source) {
const name = source.name;
if (name) {
assert(`A source named '${name}' has already been added to this coordinator.`, !this._sources[name]);
assert(`A coordinator's sources can not be changed while it is active.`, !this._activated);
this._sources[name] = source;
}
else {
assert(`Sources require a 'name' to be added to a coordinator.`, !!name);
}
}
removeSource(name) {
let source = this._sources[name];
assert(`Source '${name}' has not been added to this coordinator.`, !!source);
assert(`A coordinator's sources can not be changed while it is active.`, !this._activated);
delete this._sources[name];
}
getSource(name) {
return this._sources[name];
}
get sources() {
return objectValues(this._sources);
}
get sourceNames() {
return Object.keys(this._sources);
}
addStrategy(strategy) {
const name = strategy.name;
assert(`A strategy named '${name}' has already been added to this coordinator.`, !this._strategies[name]);
assert(`A coordinator's strategies can not be changed while it is active.`, !this._activated);
this._strategies[name] = strategy;
}
removeStrategy(name) {
let strategy = this._strategies[name];
assert(`Strategy '${name}' has not been added to this coordinator.`, !!strategy);
assert(`A coordinator's strategies can not be changed while it is active.`, !this._activated);
delete this._strategies[name];
}
getStrategy(name) {
return this._strategies[name];
}
get strategies() {
return objectValues(this._strategies);
}
get strategyNames() {
return Object.keys(this._strategies);
}
get activated() {
return this._activated;
}
async activate(options = {}) {
if (!this._activated) {
this._activated = this._activate(options);
}
await this._activated;
}
async deactivate() {
if (this._activated) {
await this._activated;
await this._deactivate();
}
this._activated = undefined;
}
async _activate(options = {}) {
if (options.logLevel === undefined) {
options.logLevel = this._defaultActivationOptions.logLevel;
}
this._currentActivationOptions = options;
for (let strategy of this.strategies) {
await strategy.activate(this, options);
}
for (let strategy of this.strategies) {
await strategy.beforeSourceActivation();
}
for (let source of this.sources) {
await source.activate();
}
for (let strategy of this.strategies) {
await strategy.afterSourceActivation();
}
}
async _deactivate() {
const strategies = this.strategies.reverse();
const sources = this.sources.reverse();
for (let strategy of strategies) {
await strategy.beforeSourceDeactivation();
}
for (let source of sources) {
await source.deactivate();
}
for (let strategy of strategies) {
await strategy.afterSourceDeactivation();
}
for (let strategy of strategies) {
await strategy.deactivate();
}
}
}
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{ Orbit } from '@orbit/core';\nimport { Source } from '@orbit/data';\nimport { Dict, objectValues } from '@orbit/utils';\nimport { Strategy } from './strategy';\n\nconst { assert } = Orbit;\n\nexport interface CoordinatorOptions {\n  sources?: Source[];\n  strategies?: Strategy[];\n  defaultActivationOptions?: ActivationOptions;\n}\n\nexport enum LogLevel {\n  None,\n  Errors,\n  Warnings,\n  Info\n}\n\nexport interface ActivationOptions {\n  logLevel?: LogLevel;\n}\n\n/**\n * The Coordinator class manages a set of sources to which it applies a set of\n * coordination strategies.\n */\nexport class Coordinator {\n  protected _sources: Dict<Source>;\n  protected _strategies: Dict<Strategy>;\n  protected _activated?: Promise<void>;\n  protected _defaultActivationOptions: ActivationOptions;\n  protected _currentActivationOptions?: ActivationOptions;\n\n  constructor(options: CoordinatorOptions = {}) {\n    this._sources = {};\n    this._strategies = {};\n\n    if (options.sources) {\n      options.sources.forEach((source) => this.addSource(source));\n    }\n\n    if (options.strategies) {\n      options.strategies.forEach((strategy) => this.addStrategy(strategy));\n    }\n\n    this._defaultActivationOptions = options.defaultActivationOptions || {};\n\n    if (this._defaultActivationOptions.logLevel === undefined) {\n      this._defaultActivationOptions.logLevel = LogLevel.Info;\n    }\n  }\n\n  addSource(source: Source): void {\n    const name = source.name;\n    if (name) {\n      assert(\n        `A source named '${name}' has already been added to this coordinator.`,\n        !this._sources[name]\n      );\n      assert(\n        `A coordinator's sources can not be changed while it is active.`,\n        !this._activated\n      );\n      this._sources[name] = source;\n    } else {\n      assert(`Sources require a 'name' to be added to a coordinator.`, !!name);\n    }\n  }\n\n  removeSource(name: string): void {\n    let source = this._sources[name];\n\n    assert(\n      `Source '${name}' has not been added to this coordinator.`,\n      !!source\n    );\n    assert(\n      `A coordinator's sources can not be changed while it is active.`,\n      !this._activated\n    );\n\n    delete this._sources[name];\n  }\n\n  getSource<T extends Source = Source>(name: string): T {\n    return this._sources[name] as T;\n  }\n\n  get sources(): Source[] {\n    return objectValues(this._sources);\n  }\n\n  get sourceNames(): string[] {\n    return Object.keys(this._sources);\n  }\n\n  addStrategy(strategy: Strategy): void {\n    const name = strategy.name;\n\n    assert(\n      `A strategy named '${name}' has already been added to this coordinator.`,\n      !this._strategies[name]\n    );\n    assert(\n      `A coordinator's strategies can not be changed while it is active.`,\n      !this._activated\n    );\n\n    this._strategies[name] = strategy;\n  }\n\n  removeStrategy(name: string): void {\n    let strategy = this._strategies[name];\n\n    assert(\n      `Strategy '${name}' has not been added to this coordinator.`,\n      !!strategy\n    );\n    assert(\n      `A coordinator's strategies can not be changed while it is active.`,\n      !this._activated\n    );\n\n    delete this._strategies[name];\n  }\n\n  getStrategy<T extends Strategy = Strategy>(name: string): T {\n    return this._strategies[name] as T;\n  }\n\n  get strategies(): Strategy[] {\n    return objectValues(this._strategies);\n  }\n\n  get strategyNames(): string[] {\n    return Object.keys(this._strategies);\n  }\n\n  get activated(): Promise<void> | undefined {\n    return this._activated;\n  }\n\n  async activate(options: ActivationOptions = {}): Promise<void> {\n    if (!this._activated) {\n      this._activated = this._activate(options);\n    }\n    await this._activated;\n  }\n\n  async deactivate(): Promise<void> {\n    if (this._activated) {\n      await this._activated;\n      await this._deactivate();\n    }\n\n    this._activated = undefined;\n  }\n\n  protected async _activate(options: ActivationOptions = {}): Promise<void> {\n    if (options.logLevel === undefined) {\n      options.logLevel = this._defaultActivationOptions.logLevel;\n    }\n\n    this._currentActivationOptions = options;\n\n    for (let strategy of this.strategies) {\n      await strategy.activate(this, options);\n    }\n\n    for (let strategy of this.strategies) {\n      await strategy.beforeSourceActivation();\n    }\n\n    for (let source of this.sources) {\n      await source.activate();\n    }\n\n    for (let strategy of this.strategies) {\n      await strategy.afterSourceActivation();\n    }\n  }\n\n  protected async _deactivate(): Promise<void> {\n    const strategies = this.strategies.reverse();\n    const sources = this.sources.reverse();\n\n    for (let strategy of strategies) {\n      await strategy.beforeSourceDeactivation();\n    }\n\n    for (let source of sources) {\n      await source.deactivate();\n    }\n\n    for (let strategy of strategies) {\n      await strategy.afterSourceDeactivation();\n    }\n\n    for (let strategy of strategies) {\n      await strategy.deactivate();\n    }\n  }\n}\n"]}