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29 lines
811 B
29 lines
811 B
5 years ago
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const LogHelper = require('./LogHelper')
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const EmailLogHelper = require('./EmailLogHelper')
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class ServiceContainer {
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constructor() {
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// We define the service classes here, but we won't
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// instantiate them until they're needed.
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this.definitions = {
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logging: LogHelper,
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emailLogging: EmailLogHelper,
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}
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// This is where the container will store service instances
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// so they can be reused when requested.
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this.instances = {}
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}
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getService(serviceName) {
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// Create a service instance if one doesn't already exist.
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if ( !this.instances[serviceName] ) {
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const ServiceClass = this.definitions[serviceName]
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this.instances[serviceName] = new ServiceClass()
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}
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return this.instances[serviceName]
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}
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}
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module.exports = exports = ServiceContainer
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