Initial Commit

node_modules/@grpc/grpc-js/build/src/load-balancer.js

@@ -0,0 +1,103 @@
+"use strict";
+/*
+ * Copyright 2019 gRPC authors.
+ *
+ * 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.
+ *
+ */
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.validateLoadBalancingConfig = exports.getFirstUsableConfig = exports.isLoadBalancerNameRegistered = exports.createLoadBalancer = exports.registerDefaultLoadBalancerType = exports.registerLoadBalancerType = exports.createChildChannelControlHelper = void 0;
+/**
+ * Create a child ChannelControlHelper that overrides some methods of the
+ * parent while letting others pass through to the parent unmodified. This
+ * allows other code to create these children without needing to know about
+ * all of the methods to be passed through.
+ * @param parent
+ * @param overrides
+ */
+function createChildChannelControlHelper(parent, overrides) {
+    var _a, _b, _c, _d, _e, _f, _g, _h, _j, _k;
+    return {
+        createSubchannel: (_b = (_a = overrides.createSubchannel) === null || _a === void 0 ? void 0 : _a.bind(overrides)) !== null && _b !== void 0 ? _b : parent.createSubchannel.bind(parent),
+        updateState: (_d = (_c = overrides.updateState) === null || _c === void 0 ? void 0 : _c.bind(overrides)) !== null && _d !== void 0 ? _d : parent.updateState.bind(parent),
+        requestReresolution: (_f = (_e = overrides.requestReresolution) === null || _e === void 0 ? void 0 : _e.bind(overrides)) !== null && _f !== void 0 ? _f : parent.requestReresolution.bind(parent),
+        addChannelzChild: (_h = (_g = overrides.addChannelzChild) === null || _g === void 0 ? void 0 : _g.bind(overrides)) !== null && _h !== void 0 ? _h : parent.addChannelzChild.bind(parent),
+        removeChannelzChild: (_k = (_j = overrides.removeChannelzChild) === null || _j === void 0 ? void 0 : _j.bind(overrides)) !== null && _k !== void 0 ? _k : parent.removeChannelzChild.bind(parent),
+    };
+}
+exports.createChildChannelControlHelper = createChildChannelControlHelper;
+const registeredLoadBalancerTypes = {};
+let defaultLoadBalancerType = null;
+function registerLoadBalancerType(typeName, loadBalancerType, loadBalancingConfigType) {
+    registeredLoadBalancerTypes[typeName] = {
+        LoadBalancer: loadBalancerType,
+        LoadBalancingConfig: loadBalancingConfigType,
+    };
+}
+exports.registerLoadBalancerType = registerLoadBalancerType;
+function registerDefaultLoadBalancerType(typeName) {
+    defaultLoadBalancerType = typeName;
+}
+exports.registerDefaultLoadBalancerType = registerDefaultLoadBalancerType;
+function createLoadBalancer(config, channelControlHelper) {
+    const typeName = config.getLoadBalancerName();
+    if (typeName in registeredLoadBalancerTypes) {
+        return new registeredLoadBalancerTypes[typeName].LoadBalancer(channelControlHelper);
+    }
+    else {
+        return null;
+    }
+}
+exports.createLoadBalancer = createLoadBalancer;
+function isLoadBalancerNameRegistered(typeName) {
+    return typeName in registeredLoadBalancerTypes;
+}
+exports.isLoadBalancerNameRegistered = isLoadBalancerNameRegistered;
+function getFirstUsableConfig(configs, fallbackTodefault = false) {
+    for (const config of configs) {
+        if (config.getLoadBalancerName() in registeredLoadBalancerTypes) {
+            return config;
+        }
+    }
+    if (fallbackTodefault) {
+        if (defaultLoadBalancerType) {
+            return new registeredLoadBalancerTypes[defaultLoadBalancerType].LoadBalancingConfig();
+        }
+        else {
+            return null;
+        }
+    }
+    else {
+        return null;
+    }
+}
+exports.getFirstUsableConfig = getFirstUsableConfig;
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+function validateLoadBalancingConfig(obj) {
+    if (!(obj !== null && typeof obj === 'object')) {
+        throw new Error('Load balancing config must be an object');
+    }
+    const keys = Object.keys(obj);
+    if (keys.length !== 1) {
+        throw new Error('Provided load balancing config has multiple conflicting entries');
+    }
+    const typeName = keys[0];
+    if (typeName in registeredLoadBalancerTypes) {
+        return registeredLoadBalancerTypes[typeName].LoadBalancingConfig.createFromJson(obj[typeName]);
+    }
+    else {
+        throw new Error(`Unrecognized load balancing config name ${typeName}`);
+    }
+}
+exports.validateLoadBalancingConfig = validateLoadBalancingConfig;
+//# sourceMappingURL=load-balancer.js.map