| /** |
| * 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.curator.x.discovery.server.contexts; |
| |
| import com.fasterxml.jackson.databind.JsonNode; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.fasterxml.jackson.databind.node.ObjectNode; |
| import com.google.common.reflect.TypeToken; |
| import org.apache.curator.x.discovery.ProviderStrategy; |
| import org.apache.curator.x.discovery.ServiceDiscovery; |
| import org.apache.curator.x.discovery.server.rest.DiscoveryContext; |
| import javax.ws.rs.ext.ContextResolver; |
| import javax.ws.rs.ext.Provider; |
| |
| /** |
| * For convenience, a version of {@link DiscoveryContext} that uses any generic type as the payload |
| */ |
| @Provider |
| public class GenericDiscoveryContext<T> implements DiscoveryContext<T>, ContextResolver<DiscoveryContext<T>> |
| { |
| private final ServiceDiscovery<T> serviceDiscovery; |
| private final ProviderStrategy<T> providerStrategy; |
| private final int instanceRefreshMs; |
| private final TypeToken<T> payloadType; |
| |
| public GenericDiscoveryContext(ServiceDiscovery<T> serviceDiscovery, ProviderStrategy<T> providerStrategy, int instanceRefreshMs, Class<T> payloadType) |
| { |
| this(serviceDiscovery, providerStrategy, instanceRefreshMs, TypeToken.of(payloadType)); |
| } |
| |
| public GenericDiscoveryContext(ServiceDiscovery<T> serviceDiscovery, ProviderStrategy<T> providerStrategy, int instanceRefreshMs, TypeToken<T> payloadType) |
| { |
| this.serviceDiscovery = serviceDiscovery; |
| this.providerStrategy = providerStrategy; |
| this.instanceRefreshMs = instanceRefreshMs; |
| this.payloadType = payloadType; |
| } |
| |
| @Override |
| public ProviderStrategy<T> getProviderStrategy() |
| { |
| return providerStrategy; |
| } |
| |
| @Override |
| public int getInstanceRefreshMs() |
| { |
| return instanceRefreshMs; |
| } |
| |
| @Override |
| public ServiceDiscovery<T> getServiceDiscovery() |
| { |
| return serviceDiscovery; |
| } |
| |
| @Override |
| public void marshallJson(ObjectNode node, String fieldName, T payload) throws Exception |
| { |
| if ( payload == null ) |
| { |
| //noinspection unchecked |
| payload = (T)payloadType.getRawType().newInstance(); |
| } |
| |
| node.putPOJO(fieldName, payload); |
| } |
| |
| @Override |
| public T unMarshallJson(JsonNode node) throws Exception |
| { |
| T payload; |
| ObjectMapper mapper = new ObjectMapper(); |
| //noinspection unchecked |
| payload = (T)mapper.readValue(mapper.treeAsTokens(node), payloadType.getRawType()); |
| return payload; |
| } |
| |
| @Override |
| public DiscoveryContext<T> getContext(Class<?> type) |
| { |
| return this; |
| } |
| } |