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asg_lambda-show.js
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asg_lambda-show.js
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'use strict';
var redis = require('redis');
exports.handler = function (event, context) {
var endpoint = event.EndPoint;
var group = event.Group;
console.log("Endpoint: '"+ endpoint + "', Group: '" + group + "'");
console.log("Connecting to Redis at '" + endpoint + "'");
var client = new redis.createClient(endpoint, {
socket_keepalive: false,
enable_offline_queue: false,
connect_timeout: 2000,
retry_strategy: function (options) {
if (options.error.code === 'ECONNREFUSED')
return new Error('The server refused the connection');
if (options.total_retry_time > 1000 * 2)
return new Error('Retry time exhausted');
if (options.times_connected > 5)
return undefined;
return Math.min(options.attempt * 50, 100);
}
});
client.on("error", function (err) {
console.error("Error " + err);
context.done(err);
});
client.on('end', function() {
console.log('Connection closed.');
});
client.on('ready', function () {
console.log("Connected to Redis.");
console.log("Existing keys:");
client.keys(group ? group + ':*' : '*', function (err, keys) {
if (err) return console.log(err);
if (keys.length < 1) {
console.log("No existing keys.");
}
else {
console.log(JSON.stringify(keys, null, 2));
var listPromise = new Promise(function(resolve, reject) {
client.lrange(group + ":list", 0, -1, function (err, replies) {
if (err) {
console.log("list error: " + err);
reject(err);
}
console.log("list: " + replies);
resolve();
});
});
var mapPromise = new Promise(function(resolve, reject) {
client.hgetall(group + ":map", function (err, replies) {
if (err) {
console.log("map error: " + err);
reject(err);
}
console.log("map: ", replies);
resolve();
});
});
var counterPromise = new Promise(function(resolve, reject) {
client.get(group + ":counter", function (err, replies) {
if (err) {
console.log("counter error: " + err);
reject(err);
}
console.log("counter: " + replies);
resolve();
});
});
}
Promise.all([listPromise, mapPromise, counterPromise]).then(function() {
context.done(err);
});
});
});
};