| /* |
| * 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. |
| */ |
| |
| package org.apache.hadoop.registry.client.types; |
| |
| import com.google.common.base.Preconditions; |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.registry.client.exceptions.InvalidRecordException; |
| import org.codehaus.jackson.annotate.JsonAnyGetter; |
| import org.codehaus.jackson.annotate.JsonAnySetter; |
| import org.codehaus.jackson.map.annotate.JsonSerialize; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * JSON-marshallable description of a single component. |
| * It supports the deserialization of unknown attributes, but does |
| * not support their creation. |
| */ |
| @InterfaceAudience.Public |
| @InterfaceStability.Evolving |
| @JsonSerialize(include = JsonSerialize.Inclusion.NON_NULL) |
| public class ServiceRecord implements Cloneable { |
| |
| /** |
| * A type string which MUST be in the serialized json. This permits |
| * fast discarding of invalid entries |
| */ |
| public static final String RECORD_TYPE = "JSONServiceRecord"; |
| |
| /** |
| * The type field. This must be the string {@link #RECORD_TYPE} |
| */ |
| public String type = RECORD_TYPE; |
| |
| /** |
| * Description string |
| */ |
| public String description; |
| |
| /** |
| * map to handle unknown attributes. |
| */ |
| private Map<String, String> attributes = new HashMap<String, String>(4); |
| |
| /** |
| * List of endpoints intended for use to external callers |
| */ |
| public List<Endpoint> external = new ArrayList<Endpoint>(); |
| |
| /** |
| * List of endpoints for use <i>within</i> an application. |
| */ |
| public List<Endpoint> internal = new ArrayList<Endpoint>(); |
| |
| /** |
| * Create a service record with no ID, description or registration time. |
| * Endpoint lists are set to empty lists. |
| */ |
| public ServiceRecord() { |
| } |
| |
| /** |
| * Deep cloning constructor |
| * @param that service record source |
| */ |
| public ServiceRecord(ServiceRecord that) { |
| this.description = that.description; |
| // others |
| Map<String, String> thatAttrs = that.attributes; |
| for (Map.Entry<String, String> entry : thatAttrs.entrySet()) { |
| attributes.put(entry.getKey(), entry.getValue()); |
| } |
| // endpoints |
| List<Endpoint> src = that.internal; |
| if (src != null) { |
| internal = new ArrayList<Endpoint>(src.size()); |
| for (Endpoint endpoint : src) { |
| internal.add(new Endpoint(endpoint)); |
| } |
| } |
| src = that.external; |
| if (src != null) { |
| external = new ArrayList<Endpoint>(src.size()); |
| for (Endpoint endpoint : src) { |
| external.add(new Endpoint(endpoint)); |
| } |
| } |
| } |
| |
| /** |
| * Add an external endpoint |
| * @param endpoint endpoint to set |
| */ |
| public void addExternalEndpoint(Endpoint endpoint) { |
| Preconditions.checkArgument(endpoint != null); |
| endpoint.validate(); |
| external.add(endpoint); |
| } |
| |
| /** |
| * Add an internal endpoint |
| * @param endpoint endpoint to set |
| */ |
| public void addInternalEndpoint(Endpoint endpoint) { |
| Preconditions.checkArgument(endpoint != null); |
| endpoint.validate(); |
| internal.add(endpoint); |
| } |
| |
| /** |
| * Look up an internal endpoint |
| * @param api API |
| * @return the endpoint or null if there was no match |
| */ |
| public Endpoint getInternalEndpoint(String api) { |
| return findByAPI(internal, api); |
| } |
| |
| /** |
| * Look up an external endpoint |
| * @param api API |
| * @return the endpoint or null if there was no match |
| */ |
| public Endpoint getExternalEndpoint(String api) { |
| return findByAPI(external, api); |
| } |
| |
| /** |
| * Handle unknown attributes by storing them in the |
| * {@link #attributes} map |
| * @param key attribute name |
| * @param value attribute value. |
| */ |
| @JsonAnySetter |
| public void set(String key, Object value) { |
| attributes.put(key, value.toString()); |
| } |
| |
| /** |
| * The map of "other" attributes set when parsing. These |
| * are not included in the JSON value of this record when it |
| * is generated. |
| * @return a map of any unknown attributes in the deserialized JSON. |
| */ |
| @JsonAnyGetter |
| public Map<String, String> attributes() { |
| return attributes; |
| } |
| |
| /** |
| * Get the "other" attribute with a specific key |
| * @param key key to look up |
| * @return the value or null |
| */ |
| public String get(String key) { |
| return attributes.get(key); |
| } |
| |
| /** |
| * Get the "other" attribute with a specific key. |
| * @param key key to look up |
| * @param defVal default value |
| * @return the value as a string, |
| * or <code>defval</code> if the value was not present |
| */ |
| public String get(String key, String defVal) { |
| String val = attributes.get(key); |
| return val != null ? val: defVal; |
| } |
| |
| /** |
| * Find an endpoint by its API |
| * @param list list |
| * @param api api name |
| * @return the endpoint or null if there was no match |
| */ |
| private Endpoint findByAPI(List<Endpoint> list, String api) { |
| for (Endpoint endpoint : list) { |
| if (endpoint.api.equals(api)) { |
| return endpoint; |
| } |
| } |
| return null; |
| } |
| |
| @Override |
| public String toString() { |
| final StringBuilder sb = |
| new StringBuilder("ServiceRecord{"); |
| sb.append("description='").append(description).append('\''); |
| sb.append("; external endpoints: {"); |
| for (Endpoint endpoint : external) { |
| sb.append(endpoint).append("; "); |
| } |
| sb.append("}; internal endpoints: {"); |
| for (Endpoint endpoint : internal) { |
| sb.append(endpoint != null ? endpoint.toString() : "NULL ENDPOINT"); |
| sb.append("; "); |
| } |
| sb.append('}'); |
| |
| if (!attributes.isEmpty()) { |
| sb.append(", attributes: {"); |
| for (Map.Entry<String, String> attr : attributes.entrySet()) { |
| sb.append("\"").append(attr.getKey()).append("\"=\"") |
| .append(attr.getValue()).append("\" "); |
| } |
| } else { |
| |
| sb.append(", attributes: {"); |
| } |
| sb.append('}'); |
| |
| sb.append('}'); |
| return sb.toString(); |
| } |
| |
| /** |
| * Shallow clone: all endpoints will be shared across instances |
| * @return a clone of the instance |
| * @throws CloneNotSupportedException |
| */ |
| @Override |
| protected Object clone() throws CloneNotSupportedException { |
| return super.clone(); |
| } |
| |
| @Override |
| public int hashCode() { |
| // Generated by eclipse |
| final int prime = 31; |
| int result = 1; |
| result = |
| prime * result + ((attributes == null) ? 0 : attributes.hashCode()); |
| result = |
| prime * result + ((description == null) ? 0 : description.hashCode()); |
| result = prime * result + ((external == null) ? 0 : external.hashCode()); |
| result = prime * result + ((internal == null) ? 0 : internal.hashCode()); |
| result = prime * result + ((type == null) ? 0 : type.hashCode()); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) { |
| return true; |
| } |
| if (obj == null) { |
| return false; |
| } |
| if (getClass() != obj.getClass()) { |
| return false; |
| } |
| ServiceRecord other = (ServiceRecord) obj; |
| if (attributes == null) { |
| if (other.attributes != null) { |
| return false; |
| } |
| } else if (!attributes.equals(other.attributes)) { |
| return false; |
| } |
| if (description == null) { |
| if (other.description != null) { |
| return false; |
| } |
| } else if (!description.equals(other.description)) { |
| return false; |
| } |
| if (external == null) { |
| if (other.external != null) { |
| return false; |
| } |
| } else if (!external.equals(other.external)) { |
| return false; |
| } |
| if (internal == null) { |
| if (other.internal != null) { |
| return false; |
| } |
| } else if (!internal.equals(other.internal)) { |
| return false; |
| } |
| if (type == null) { |
| if (other.type != null) { |
| return false; |
| } |
| } else if (!type.equals(other.type)) { |
| return false; |
| } |
| return true; |
| } |
| |
| } |