WIP: initial prototype

- Added keep-alive Agent
- Added support for HTTPS
- Added log events

lib/ConnectionPool.js

@@ -1,5 +1,6 @@
 'use strict'
 
+const { URL } = require('url')
 const debug = require('debug')('elasticsearch')
 const Connection = require('./Connection')
 
@@ -9,6 +10,7 @@ class ConnectionPool {
     this.alive = []
     this.dead = []
     this.selector = opts.selector
+    this.sll = opts.sll
     // the resurrect timeout is 60s
     // we multiply it by 2 because the resurrect formula is
     // `Math.pow(resurrectTimeout * 2, deadCount -1)`
@@ -132,16 +134,17 @@ class ConnectionPool {
    * @param {object|string} host
    * @returns {ConnectionPool}
    */
-  addConnection (host) {
-    if (Array.isArray(host)) {
-      host.forEach(h => this.addConnection(h))
+  addConnection (opts) {
+    if (Array.isArray(opts)) {
+      opts.forEach(o => this.addConnection(o))
       return
     }
 
-    if (typeof host === 'string') {
-      host = this.urlToHost(host)
+    if (typeof opts === 'string') {
+      opts = this.urlToHost(opts)
     }
-    const connection = new Connection(host)
+    Object.assign(opts, this.ssl)
+    const connection = new Connection(opts)
     debug('Adding a new connection', connection)
     this.connections.set(connection.id, connection)
     this.alive.push(connection.id)
@@ -156,6 +159,7 @@ class ConnectionPool {
    */
   removeConnection (connection) {
     debug('Removing connection', connection)
+    connection.close()
     const { id } = connection
     this.connections.delete(id)
     var index = this.dead.indexOf(id)
@@ -193,8 +197,14 @@ class ConnectionPool {
 
     for (var i = 0, len = ids.length; i < len; i++) {
       const node = nodes[ids[i]]
+      // If there is no protocol in
+      // the `publish_address` new URL wil throw
+      var address = node.http.publish_address
+      address = address.slice(0, 4) === 'http'
+        ? address
+        : 'http://' + address
       hosts.push({
-        url: node.http.publish_address,
+        host: new URL(address),
         id: ids[i],
         roles: node.roles.reduce((acc, role) => {
           acc[role] = true
@@ -214,8 +224,7 @@ class ConnectionPool {
    */
   urlToHost (url) {
     return {
-      id: url,
-      url
+      host: new URL(url)
     }
   }
 }