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Diffstat (limited to 'qpid/tools/src/java/qpid-qmf2-rest/src/main/java/org/apache/qpid/restapi/Server.java')
-rw-r--r-- | qpid/tools/src/java/qpid-qmf2-rest/src/main/java/org/apache/qpid/restapi/Server.java | 95 |
1 files changed, 95 insertions, 0 deletions
diff --git a/qpid/tools/src/java/qpid-qmf2-rest/src/main/java/org/apache/qpid/restapi/Server.java b/qpid/tools/src/java/qpid-qmf2-rest/src/main/java/org/apache/qpid/restapi/Server.java new file mode 100644 index 0000000000..e7f5d61219 --- /dev/null +++ b/qpid/tools/src/java/qpid-qmf2-rest/src/main/java/org/apache/qpid/restapi/Server.java @@ -0,0 +1,95 @@ +/* + * + * 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.qpid.restapi; + +import java.io.IOException; + +/** + * A Server represents a handler that runs within a Web server, which is invoked to process HTTP exchanges. + * Servers receive and respond to requests from Web clients that are encapsulated into HttpTransactions. + * <p> + * The Server and HttpTransaction interfaces are intended to provide abstractions to enable the "business logic" to + * be isolated from the actual Web Server implementation choice, so for example a concrete HttpTransaction implementation + * could be created by wrapping a com.sun.net.httpserver.HttpExchange, but equally another implementation could wrap + * javax.servlet.http.HttpServletRequest and javax.servlet.http.HttpServletResponse so for example an HttpServlet + * could delegate to a Server instance passing the HttpTransaction it constructed from the HttpServletRequest and + * HttpServletResponse. + * + * @author Fraser Adams + */ +public interface Server +{ + /** + * Called by the Web Server to allow a Server to handle a GET request. + * <p> + * The GET method should be safe, that is, without any side effects for which users are held responsible. For + * example, most form queries have no side effects. If a client request is intended to change stored data, the + * request should use some other HTTP method. + * <p> + * The GET method should also be idempotent, meaning that it can be safely repeated. Sometimes making a method safe + * also makes it idempotent. For example, repeating queries is both safe and idempotent, but buying a product online + * or modifying data is neither safe nor idempotent. + * + * @param tx the HttpTransaction containing the request from the client and used to send the response. + */ + public void doGet(HttpTransaction tx) throws IOException; + + /** + * Called by the Web Server to allow a Server to handle a POST request. + * <p> + * The HTTP POST method allows the client to send data of unlimited length to the Web server a single time and is + * useful when posting information such as credit card numbers. + * <p> + * This method does not need to be either safe or idempotent. Operations requested through POST can have side + * effects for which the user can be held accountable, for example, updating stored data or buying items online. + * + * @param tx the HttpTransaction containing the request from the client and used to send the response. + */ + public void doPost(HttpTransaction tx) throws IOException; + + /** + * Called by the Web Server to allow a Server to handle a PUT request. + * <p> + * The PUT operation allows a client to place a file on the server and is similar to sending a file by FTP. + * <p> + * This method does not need to be either safe or idempotent. Operations that doPut performs can have side effects + * for which the user can be held accountable. When using this method, it may be useful to save a copy of the + * affected URL in temporary storage. + * + * @param tx the HttpTransaction containing the request from the client and used to send the response. + */ + public void doPut(HttpTransaction tx) throws IOException; + + /** + * Called by the Web Server to allow a Server to handle a DELETE request. + * <p> + * The DELETE operation allows a client to remove a document or Web page from the server. + * <p> + * This method does not need to be either safe or idempotent. Operations requested through DELETE can have side + * effects for which users can be held accountable. When using this method, it may be useful to save a copy of the + * affected URL in temporary storage. + * + * @param tx the HttpTransaction containing the request from the client and used to send the response. + */ + public void doDelete(HttpTransaction tx) throws IOException; +} + + |