Support for Elasticsearch 7.3 (#928)

lib/pool/CloudConnectionPool.js

@@ -0,0 +1,49 @@
+// Licensed to Elasticsearch B.V under one or more agreements.
+// Elasticsearch B.V licenses this file to you under the Apache 2.0 License.
+// See the LICENSE file in the project root for more information
+
+'use strict'
+
+const BaseConnectionPool = require('./BaseConnectionPool')
+
+class CloudConnectionPool extends BaseConnectionPool {
+  constructor (opts = {}) {
+    super(opts)
+    this.cloudConnection = null
+  }
+
+  /**
+   * Returns the only cloud connection.
+   *
+   * @returns {object} connection
+   */
+  getConnection () {
+    return this.cloudConnection
+  }
+
+  /**
+   * Empties the connection pool.
+   *
+   * @returns {ConnectionPool}
+   */
+  empty (callback) {
+    super.empty(() => {
+      this.cloudConnection = null
+      callback()
+    })
+  }
+
+  /**
+   * Update the ConnectionPool with new connections.
+   *
+   * @param {array} array of connections
+   * @returns {ConnectionPool}
+   */
+  update (connections) {
+    super.update(connections)
+    this.cloudConnection = this.connections[0]
+    return this
+  }
+}
+
+module.exports = CloudConnectionPool