Node JS version

node_modules/cassandra-driver/lib/policies/index.js

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+/*
+ * Copyright DataStax, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+'use strict';
+
+/**
+ * Contains driver tuning policies to determine [load balancing]{@link module:policies/loadBalancing},
+ *  [retrying]{@link module:policies/retry} queries, [reconnecting]{@link module:policies/reconnection} to a node,
+ *  [address resolution]{@link module:policies/addressResolution},
+ *  [timestamp generation]{@link module:policies/timestampGeneration} and
+ *  [speculative execution]{@link module:policies/speculativeExecution}.
+ * @module policies
+ */
+const addressResolution = exports.addressResolution = require('./address-resolution');
+const loadBalancing = exports.loadBalancing = require('./load-balancing');
+const reconnection = exports.reconnection = require('./reconnection');
+const retry = exports.retry = require('./retry');
+const speculativeExecution = exports.speculativeExecution = require('./speculative-execution');
+const timestampGeneration = exports.timestampGeneration = require('./timestamp-generation');
+
+/**
+ * Returns a new instance of the default address translator policy used by the driver.
+ * @returns {AddressTranslator}
+ */
+exports.defaultAddressTranslator = function () {
+  return new addressResolution.AddressTranslator();
+};
+
+/**
+ * Returns a new instance of the default load-balancing policy used by the driver.
+ * @param {string} [localDc] When provided, it sets the data center that is going to be used as local for the
+ * load-balancing policy instance.
+ * <p>When localDc is undefined, the load-balancing policy instance will use the <code>localDataCenter</code>
+ * provided in the {@link ClientOptions}.</p>
+ * @returns {LoadBalancingPolicy}
+ */
+exports.defaultLoadBalancingPolicy = function (localDc) {
+  return new loadBalancing.DefaultLoadBalancingPolicy(localDc);
+};
+
+/**
+ * Returns a new instance of the default retry policy used by the driver.
+ * @returns {RetryPolicy}
+ */
+exports.defaultRetryPolicy = function () {
+  return new retry.RetryPolicy();
+};
+
+/**
+ * Returns a new instance of the default reconnection policy used by the driver.
+ * @returns {ReconnectionPolicy}
+ */
+exports.defaultReconnectionPolicy = function () {
+  return new reconnection.ExponentialReconnectionPolicy(1000, 10 * 60 * 1000, false);
+};
+
+
+/**
+ * Returns a new instance of the default speculative execution policy used by the driver.
+ * @returns {SpeculativeExecutionPolicy}
+ */
+exports.defaultSpeculativeExecutionPolicy = function () {
+  return new speculativeExecution.NoSpeculativeExecutionPolicy();
+};
+
+/**
+ * Returns a new instance of the default timestamp generator used by the driver.
+ * @returns {TimestampGenerator}
+ */
+exports.defaultTimestampGenerator = function () {
+  return new timestampGeneration.MonotonicTimestampGenerator();
+};