2 * Copyright (c) 2016 Cisco and/or its affiliates.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 package org.openvpp.jvpp.future;
21 import java.util.Objects;
22 import java.util.concurrent.CompletableFuture;
23 import java.util.concurrent.CompletionStage;
24 import org.openvpp.jvpp.JVpp;
25 import org.openvpp.jvpp.dto.ControlPing;
26 import org.openvpp.jvpp.dto.JVppDump;
27 import org.openvpp.jvpp.dto.JVppReply;
28 import org.openvpp.jvpp.dto.JVppReplyDump;
29 import org.openvpp.jvpp.dto.JVppRequest;
32 * Future facade on top of JVpp
34 public class FutureJVppInvokerFacade implements FutureJVppInvoker {
36 private final JVpp jvpp;
41 private final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requests;
43 public FutureJVppInvokerFacade(final JVpp jvpp,
44 final Map<Integer, CompletableFuture<? extends JVppReply<?>>> requestMap) {
45 this.jvpp = Objects.requireNonNull(jvpp, "Null jvpp");
46 // Request map represents the shared state between this facade and it's callback
47 // where facade puts futures in and callback completes + removes them
48 // TODO what if the call never completes ?
49 this.requests = Objects.requireNonNull(requestMap, "Null requestMap");
52 protected final Map<Integer, CompletableFuture<? extends JVppReply<?>>> getRequests() {
56 // TODO use Optional in Future, java8
59 @SuppressWarnings("unchecked")
60 public <REQ extends JVppRequest, REPLY extends JVppReply<REQ>> CompletionStage<REPLY> send(REQ req) {
61 synchronized(requests) {
62 final int contextId = jvpp.send(req);
64 final CompletableFuture<REPLY> replyCompletableFuture;
65 if(req instanceof JVppDump) {
66 replyCompletableFuture = (CompletableFuture<REPLY>) new CompletableDumpFuture<>(contextId);
68 replyCompletableFuture = new CompletableFuture<>();
71 requests.put(contextId, replyCompletableFuture);
72 if(req instanceof JVppDump) {
73 requests.put(jvpp.send(new ControlPing()), replyCompletableFuture);
75 return replyCompletableFuture;
79 static final class CompletableDumpFuture<T extends JVppReplyDump<?, ?>> extends CompletableFuture<T> {
80 // The reason why this is not final is the instantiation of ReplyDump DTOs
81 // Their instantiation must be generated, so currently the DTOs are created in callback and set when first dump reponses
82 // is handled in the callback.
84 private final long contextId;
86 CompletableDumpFuture(final long contextId) {
87 this.contextId = contextId;
98 void setReplyDump(final T replyDump) {
99 this.replyDump = replyDump;
104 public void close() throws Exception {