@orbit/coordinator
Version:
A coordinator and set of coordination strategies for managing data flow and keeping @orbit/data sources in sync.
122 lines • 16 kB
JavaScript
import { LogLevel } from '../coordinator';
import { Strategy } from '../strategy';
import { isPullable, isPushable, isQueryable, isSyncable, isUpdatable } from '@orbit/data';
import { deepGet, deepSet } from '@orbit/utils';
export class EventLoggingStrategy extends Strategy {
constructor(options = {}) {
super({
...options,
name: options.name || 'event-logging'
});
this._events = options.events;
this._interfaces = options.interfaces;
this._logPrefix = options.logPrefix || '[source-event]';
}
async activate(coordinator, options = {}) {
await super.activate(coordinator, options);
this._eventListeners = {};
this._sources.forEach((source) => this._activateSource(source));
}
async deactivate() {
await super.deactivate();
this._sources.forEach((source) => this._deactivateSource(source));
this._eventListeners = undefined;
}
_activateSource(source) {
this._sourceEvents(source).forEach((event) => {
this._addListener(source, event);
});
}
_deactivateSource(source) {
this._sourceEvents(source).forEach((event) => {
this._removeListener(source, event);
});
}
_sourceEvents(source) {
if (this._events) {
return this._events;
}
else {
let events = [];
let interfaces = this._interfaces || this._sourceInterfaces(source);
interfaces.forEach((i) => {
Array.prototype.push.apply(events, this._interfaceEvents(i));
});
return events;
}
}
_sourceInterfaces(source) {
let interfaces = ['transformable'];
if (isPullable(source)) {
interfaces.push('pullable');
}
if (isPushable(source)) {
interfaces.push('pushable');
}
if (isQueryable(source)) {
interfaces.push('queryable');
}
if (isSyncable(source)) {
interfaces.push('syncable');
}
if (isUpdatable(source)) {
interfaces.push('updatable');
}
return interfaces;
}
_interfaceEvents(interfaceName) {
if (this._logLevel === LogLevel.Info) {
switch (interfaceName) {
case 'pullable':
return ['beforePull', 'pull', 'pullFail'];
case 'pushable':
return ['beforePush', 'push', 'pushFail'];
case 'queryable':
return ['beforeQuery', 'query', 'queryFail'];
case 'updatable':
return ['beforeUpdate', 'update', 'updateFail'];
case 'syncable':
return ['beforeSync', 'sync', 'syncFail'];
case 'transformable':
return ['transform'];
}
}
else if (this._logLevel !== undefined && this._logLevel > LogLevel.None) {
switch (interfaceName) {
case 'pullable':
return ['pullFail'];
case 'pushable':
return ['pushFail'];
case 'queryable':
return ['queryFail'];
case 'syncable':
return ['syncFail'];
case 'updatable':
return ['updateFail'];
}
}
return [];
}
_addListener(source, event) {
const listener = this._generateListener(source, event);
const sourceName = this.getSourceName(source);
deepSet(this._eventListeners, [sourceName, event], listener);
source.on(event, listener);
}
_removeListener(source, event) {
const sourceName = this.getSourceName(source);
const listener = deepGet(this._eventListeners, [
sourceName,
event
]);
source.off(event, listener);
deepSet(this._eventListeners, [sourceName, event], undefined);
}
_generateListener(source, event) {
const sourceName = this.getSourceName(source);
return (...args) => {
console.log(this._logPrefix, sourceName, event, ...args);
};
}
}
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{ Coordinator, ActivationOptions, LogLevel } from '../coordinator';\nimport { Strategy, StrategyOptions } from '../strategy';\nimport { Listener } from '@orbit/core';\nimport {\n  Source,\n  isPullable,\n  isPushable,\n  isQueryable,\n  isSyncable,\n  isUpdatable\n} from '@orbit/data';\nimport { Dict, deepGet, deepSet } from '@orbit/utils';\n\ndeclare const console: any;\n\nexport interface EventLoggingStrategyOptions extends StrategyOptions {\n  events?: string[];\n  interfaces?: string[];\n}\n\nexport class EventLoggingStrategy extends Strategy {\n  protected _events?: string[];\n  protected _interfaces?: string[];\n  protected _eventListeners?: Dict<Dict<Listener>>;\n\n  constructor(options: EventLoggingStrategyOptions = {}) {\n    super({\n      ...options,\n      name: options.name || 'event-logging'\n    });\n\n    this._events = options.events;\n    this._interfaces = options.interfaces;\n    this._logPrefix = options.logPrefix || '[source-event]';\n  }\n\n  async activate(\n    coordinator: Coordinator,\n    options: ActivationOptions = {}\n  ): Promise<void> {\n    await super.activate(coordinator, options);\n    this._eventListeners = {};\n    this._sources.forEach((source) => this._activateSource(source));\n  }\n\n  async deactivate(): Promise<void> {\n    await super.deactivate();\n    this._sources.forEach((source) => this._deactivateSource(source));\n    this._eventListeners = undefined;\n  }\n\n  protected _activateSource(source: Source): void {\n    this._sourceEvents(source).forEach((event) => {\n      this._addListener(source, event);\n    });\n  }\n\n  protected _deactivateSource(source: Source): void {\n    this._sourceEvents(source).forEach((event) => {\n      this._removeListener(source, event);\n    });\n  }\n\n  protected _sourceEvents(source: Source): string[] {\n    if (this._events) {\n      return this._events;\n    } else {\n      let events: string[] = [];\n      let interfaces = this._interfaces || this._sourceInterfaces(source);\n\n      interfaces.forEach((i) => {\n        Array.prototype.push.apply(events, this._interfaceEvents(i));\n      });\n\n      return events;\n    }\n  }\n\n  protected _sourceInterfaces(source: Source): string[] {\n    let interfaces = ['transformable'];\n    if (isPullable(source)) {\n      interfaces.push('pullable');\n    }\n    if (isPushable(source)) {\n      interfaces.push('pushable');\n    }\n    if (isQueryable(source)) {\n      interfaces.push('queryable');\n    }\n    if (isSyncable(source)) {\n      interfaces.push('syncable');\n    }\n    if (isUpdatable(source)) {\n      interfaces.push('updatable');\n    }\n    return interfaces;\n  }\n\n  protected _interfaceEvents(interfaceName: string): string[] {\n    if (this._logLevel === LogLevel.Info) {\n      switch (interfaceName) {\n        case 'pullable':\n          return ['beforePull', 'pull', 'pullFail'];\n        case 'pushable':\n          return ['beforePush', 'push', 'pushFail'];\n        case 'queryable':\n          return ['beforeQuery', 'query', 'queryFail'];\n        case 'updatable':\n          return ['beforeUpdate', 'update', 'updateFail'];\n        case 'syncable':\n          return ['beforeSync', 'sync', 'syncFail'];\n        case 'transformable':\n          return ['transform'];\n      }\n    } else if (this._logLevel !== undefined && this._logLevel > LogLevel.None) {\n      switch (interfaceName) {\n        case 'pullable':\n          return ['pullFail'];\n        case 'pushable':\n          return ['pushFail'];\n        case 'queryable':\n          return ['queryFail'];\n        case 'syncable':\n          return ['syncFail'];\n        case 'updatable':\n          return ['updateFail'];\n      }\n    }\n    return [];\n  }\n\n  protected _addListener(source: Source, event: string): void {\n    const listener = this._generateListener(source, event);\n    const sourceName = this.getSourceName(source);\n    deepSet(this._eventListeners, [sourceName, event], listener);\n    source.on(event, listener);\n  }\n\n  protected _removeListener(source: Source, event: string): void {\n    const sourceName = this.getSourceName(source);\n    const listener = deepGet(this._eventListeners, [\n      sourceName,\n      event\n    ]) as Listener;\n    source.off(event, listener);\n    deepSet(this._eventListeners, [sourceName, event], undefined);\n  }\n\n  protected _generateListener(source: Source, event: string): Listener {\n    const sourceName = this.getSourceName(source);\n    return (...args: any[]) => {\n      console.log(this._logPrefix, sourceName, event, ...args);\n    };\n  }\n}\n"]}