| /* |
| * 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.vinci.transport.vns.client; |
| |
| import org.apache.vinci.transport.Frame; |
| import org.apache.vinci.transport.FrameComponent; |
| import org.apache.vinci.transport.FrameLeaf; |
| import org.apache.vinci.transport.TransportConstants; |
| import org.apache.vinci.transport.Transportable; |
| import org.apache.vinci.transport.TransportableFactory; |
| import org.apache.vinci.transport.VinciFrame; |
| import org.apache.vinci.transport.vns.VNSConstants; |
| |
| /** |
| * Specialized document (Frame) for representing result of querying VNS for the port on which a |
| * service should be provided. This class is used by VinciServer during port negotiation with VNS. |
| */ |
| public class ServeonResult extends Frame { |
| |
| static public TransportableFactory factory = new TransportableFactory() { |
| public Transportable makeTransportable() { |
| return new ServeonResult(); |
| } |
| }; |
| |
| /** |
| * Create a document representing the VNS serveon query for the specified service running on/with |
| * the specified host/priority/instance. |
| * |
| * @pre service_name != null |
| * @pre host_name != null |
| * @pre priority ≥ -1 |
| * @pre instance ≥ 0 |
| * @param service_name - |
| * @param host_name - |
| * @param priority - |
| * @param instance - |
| * @return - |
| * |
| */ |
| static public Transportable composeQuery(String service_name, String host_name, int priority, |
| int instance) { |
| VinciFrame query = (VinciFrame) composeQuery(service_name, host_name, priority); |
| query.fadd(VNSConstants.INSTANCE_KEY, instance); |
| return query; |
| } |
| |
| /** |
| * Create a document representing the VNS serveon query for the specified service running on/with |
| * the specified host/priority. |
| * |
| * @pre service_name != null |
| * @pre host_name != null |
| * @pre priority ≥ -1 |
| * @param service_name - |
| * @param host_name - |
| * @param priority - |
| * @return - |
| */ |
| static public Transportable composeQuery(String service_name, String host_name, int priority) { |
| VinciFrame query = (VinciFrame) composeQuery(service_name, host_name); |
| query.fadd(VNSConstants.LEVEL_KEY, priority); |
| return query; |
| } |
| |
| /** |
| * Create a document representing the VNS serveon query for the specified service running on the |
| * specified host. |
| * |
| * @pre service_name != null |
| * @pre host_name != null |
| * @param service_name - |
| * @param host_name - |
| * @return - |
| */ |
| static public Transportable composeQuery(String service_name, String host_name) { |
| VinciFrame query = new VinciFrame(); |
| query.fadd(TransportConstants.COMMAND_KEY, VNSConstants.SERVEON_COMMAND); |
| query.fadd(VNSConstants.SERVICE_KEY, service_name); |
| query.fadd(VNSConstants.HOST_KEY, host_name); |
| return query; |
| } |
| |
| /** |
| * Set to the port on which the service should be offered. |
| */ |
| public int port; |
| |
| /** |
| * Implement the Frame add() callback. |
| * |
| * @pre key != null |
| * @pre value != null |
| * @pre (!key.equals(VNSConstants.PORT_KEY) || (value instanceof FrameLeaf)) |
| */ |
| public void add(String key, FrameComponent value) { |
| if (VNSConstants.PORT_KEY.equals(key)) { |
| port = ((FrameLeaf) value).toInt(); |
| } |
| } |
| } |