| package org.apache.helix.model; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import org.apache.helix.HelixProperty; |
| import org.apache.helix.zookeeper.datamodel.ZNRecord; |
| |
| |
| /** |
| * The configuration entry for persisting the client side rest endpoint |
| * The rest endpoint is used for helix to fetch the health status or other important status of the participant at runtime |
| */ |
| public class RESTConfig extends HelixProperty { |
| /** |
| * Corresponds to "simpleFields" concept in ZnNode |
| */ |
| public enum SimpleFields { |
| /** |
| * Customized URL for getting participant(instance)'s health status or partition's health status. |
| */ |
| CUSTOMIZED_HEALTH_URL |
| } |
| |
| /** |
| * Instantiate REST config with a pre-populated record |
| * |
| * @param record a ZNRecord corresponding to a cluster configuration |
| */ |
| public RESTConfig(ZNRecord record) { |
| super(record); |
| } |
| |
| public RESTConfig(String id) { |
| super(id); |
| } |
| |
| public void set(SimpleFields property, String value) { |
| _record.setSimpleField(property.name(), value); |
| } |
| |
| public String get(SimpleFields property) { |
| return _record.getSimpleField(property.name()); |
| } |
| |
| /** |
| * Get the base restful endpoint of the instance |
| * |
| * @param instance The instance |
| * @return The base restful endpoint |
| */ |
| public String getBaseUrl(String instance) { |
| String baseUrl = get(RESTConfig.SimpleFields.CUSTOMIZED_HEALTH_URL); |
| // pre-assumption of the url, must be format of "http://*/path", the wildcard is replaceable by |
| // the instance vip |
| assert baseUrl.contains("*"); |
| // pre-assumption of the instance name, must be format of <instanceVip>_<port> |
| assert instance.contains("_"); |
| String instanceVip = instance.substring(0, instance.indexOf('_')); |
| return baseUrl.replace("*", instanceVip); |
| } |
| } |