92 lines
4.0 KiB
Java
92 lines
4.0 KiB
Java
/**
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*
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* Copyright 2020 Aditya Borikar, Florian Schmaus.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smack.websocket;
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import java.util.ArrayList;
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import java.util.List;
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import org.jivesoftware.smack.c2s.internal.ModularXmppClientToServerConnectionInternal;
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import org.jivesoftware.smack.websocket.XmppWebsocketTransportModule.EstablishingWebsocketConnectionState;
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import org.jivesoftware.smack.websocket.impl.AbstractWebsocket;
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import org.jivesoftware.smack.websocket.impl.WebsocketFactoryService;
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import org.jivesoftware.smack.websocket.rce.WebsocketRemoteConnectionEndpoint;
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public final class WebsocketConnectionAttemptState {
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private final ModularXmppClientToServerConnectionInternal connectionInternal;
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private final XmppWebsocketTransportModule.XmppWebsocketTransport.DiscoveredWebsocketEndpoints discoveredEndpoints;
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private WebsocketRemoteConnectionEndpoint connectedEndpoint;
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WebsocketConnectionAttemptState(ModularXmppClientToServerConnectionInternal connectionInternal,
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XmppWebsocketTransportModule.XmppWebsocketTransport.DiscoveredWebsocketEndpoints discoveredWebsocketEndpoints,
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EstablishingWebsocketConnectionState establishingWebsocketConnectionState) {
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assert discoveredWebsocketEndpoints != null;
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this.connectionInternal = connectionInternal;
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this.discoveredEndpoints = discoveredWebsocketEndpoints;
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}
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/**
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* Establish a websocket connection with one of the discoveredRemoteConnectionEndpoints.<br>
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*
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* @return {@link AbstractWebsocket} with which connection is establised
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* @throws InterruptedException if the calling thread was interrupted
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* @throws WebsocketException if encounters a websocket exception
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*/
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AbstractWebsocket establishWebsocketConnection() throws InterruptedException, WebsocketException {
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List<WebsocketRemoteConnectionEndpoint> endpoints = discoveredEndpoints.result.discoveredRemoteConnectionEndpoints;
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if (endpoints.isEmpty()) {
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throw new WebsocketException(new Throwable("No Endpoints discovered to establish connection"));
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}
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List<Throwable> connectionFailureList = new ArrayList<>();
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AbstractWebsocket websocket = WebsocketFactoryService.createWebsocket(connectionInternal);
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// Keep iterating over available endpoints until a connection is establised or all endpoints are tried to create a connection with.
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for (WebsocketRemoteConnectionEndpoint endpoint : endpoints) {
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try {
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websocket.connect(endpoint);
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connectedEndpoint = endpoint;
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break;
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} catch (Throwable t) {
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connectionFailureList.add(t);
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// If the number of entries in connectionFailureList is equal to the number of endpoints,
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// it means that all endpoints have been tried and have been unsuccessful.
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if (connectionFailureList.size() == endpoints.size()) {
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WebsocketException websocketException = new WebsocketException(connectionFailureList);
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throw new WebsocketException(websocketException);
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}
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}
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}
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assert connectedEndpoint != null;
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// Return connected websocket when no failure occurs.
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return websocket;
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}
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/**
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* Returns the connected websocket endpoint.
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*
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* @return connected websocket endpoint
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*/
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public WebsocketRemoteConnectionEndpoint getConnectedEndpoint() {
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return connectedEndpoint;
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}
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}
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