39 lines
1.2 KiB
JavaScript
39 lines
1.2 KiB
JavaScript
const cds = require('@sap/cds')
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module.exports['sap.capire.bookstore.CatalogService'] = cds.service.impl (async (srv) => {
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const ReviewsService = await cds.connect.to ('sap.capire.reviews.ReviewsService')
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const { Reviews } = ReviewsService.entities
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const { Books } = srv.entities
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// delegate requests to reviews service
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srv.on('READ', 'Reviews', async (req) => {
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const { SELECT } = cds.ql(req)
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const results = await SELECT.from (Reviews)
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// TODO: Should actually be using .where of fluent query API
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if (req.query.SELECT.where) {
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return results.filter (row => row.subject === req.query.SELECT.where[2].val)
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}
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return results
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})
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// react on event messages from reviews service
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ReviewsService.on ('reviewed', (msg) => {
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console.debug ('> received message:', msg.event, msg.data)
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const {subject,rating} = msg.data
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const tx = cds.transaction(msg)
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return tx.run (UPDATE(Books).set({rating}) .where ({ID:subject})) //.then (console.log)
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})
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})
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// FIXME: pls remove this...
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process.env.destinations = JSON.stringify([{
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name: 'reviewsDest',
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url: 'http://localhost:4005/reviews',
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username: 'dummy',
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password: 'dummy'
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}])
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