Example Counter
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Example Counter
apify/example-counter
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This actor simply counts up from one. In each run it prints one number. Its state (counter position) is stored in a named key-value store. The name of the store is example-counter and you can find in Apify app under Storages.
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Get a demoDockerfile
1# This is a template for a Dockerfile used to run acts in Actor system.
2# The base image name below is set during the act build, based on user settings.
3# IMPORTANT: The base image must set a correct working directory, such as /usr/src/app or /home/user
4FROM apify/actor-node-basic:v0.21.10
5
6# Second, copy just package.json and package-lock.json since it should be
7# the only file that affects "npm install" in the next step, to speed up the build
8COPY package*.json ./
9
10# Install NPM packages, skip optional and development dependencies to
11# keep the image small. Avoid logging too much and print the dependency
12# tree for debugging
13RUN npm --quiet set progress=false \
14 && npm install --only=prod --no-optional \
15 && echo "Installed NPM packages:" \
16 && (npm list --all || true) \
17 && echo "Node.js version:" \
18 && node --version \
19 && echo "NPM version:" \
20 && npm --version
21
22# Copy source code to container
23# Do this in the last step, to have fast build if only the source code changed
24COPY . ./
25
26# NOTE: The CMD is already defined by the base image.
27# Uncomment this for local node inspector debugging:
28# CMD [ "node", "--inspect=0.0.0.0:9229", "main.js" ]package.json
1{
2 "name": "apify-project",
3 "version": "0.0.1",
4 "description": "",
5 "author": "It's not you it's me",
6 "license": "ISC",
7 "dependencies": {
8 "apify": "0.21.10"
9 },
10 "scripts": {
11 "start": "node main.js"
12 }
13}main.js
1const Apify = require('apify');
2
3Apify.main(async () => {
4 // Get store with name 'example-counter'.
5 const store = await Apify.openKeyValueStore('example-counter');
6
7 // Get counter value from store
8 const record = await store.getValue('counter');
9
10 // If there is no such record then start from zero.
11 let counter = record || 0;
12
13 // Increase counter, print and set as output.
14 counter ++;
15 console.log(`Counter: ${counter}`);
16 Apify.setValue('OUTPUT', counter);
17
18 // Update the value in store
19 await store.setValue('counter', counter);
20});Developer
Apify Maintained by Apify
Actor Metrics
1 monthly user
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5 stars
>99% runs succeeded
Created in Oct 2017
Modified 5 months ago
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