2 * Copyright (c) 2010-2023 Contributors to the openHAB project
4 * See the NOTICE file(s) distributed with this work for additional
7 * This program and the accompanying materials are made available under the
8 * terms of the Eclipse Public License 2.0 which is available at
9 * http://www.eclipse.org/legal/epl-2.0
11 * SPDX-License-Identifier: EPL-2.0
13 package org.openhab.binding.radiothermostat.internal.communication;
15 import static org.eclipse.jetty.http.HttpMethod.GET;
16 import static org.eclipse.jetty.http.HttpStatus.OK_200;
17 import static org.openhab.binding.radiothermostat.internal.RadioThermostatBindingConstants.*;
19 import java.util.List;
20 import java.util.concurrent.CopyOnWriteArrayList;
21 import java.util.concurrent.ExecutionException;
22 import java.util.concurrent.TimeUnit;
23 import java.util.concurrent.TimeoutException;
25 import org.eclipse.jdt.annotation.NonNullByDefault;
26 import org.eclipse.jdt.annotation.Nullable;
27 import org.eclipse.jetty.client.HttpClient;
28 import org.eclipse.jetty.client.api.ContentResponse;
29 import org.eclipse.jetty.client.api.Request;
30 import org.eclipse.jetty.client.api.Result;
31 import org.eclipse.jetty.client.util.BufferingResponseListener;
32 import org.eclipse.jetty.client.util.StringContentProvider;
33 import org.eclipse.jetty.http.HttpHeader;
34 import org.openhab.binding.radiothermostat.internal.RadioThermostatHttpException;
35 import org.slf4j.Logger;
36 import org.slf4j.LoggerFactory;
39 * Class for communicating with the RadioThermostat web interface
41 * @author Michael Lobstein - Initial contribution
44 public class RadioThermostatConnector {
45 private final Logger logger = LoggerFactory.getLogger(RadioThermostatConnector.class);
47 private static final int REQUEST_TIMEOUT_MS = 10_000;
48 private static final String URL = "http://%s/%s";
50 private final HttpClient httpClient;
51 private final List<RadioThermostatEventListener> listeners = new CopyOnWriteArrayList<>();
53 private String hostName = BLANK;
55 public RadioThermostatConnector(HttpClient httpClient) {
56 this.httpClient = httpClient;
59 public void setThermostatHostName(String hostName) {
60 this.hostName = hostName;
64 * Add a listener to the list of listeners to be notified with events
66 * @param listener the listener
68 public void addEventListener(RadioThermostatEventListener listener) {
69 listeners.add(listener);
73 * Remove a listener from the list of listeners to be notified with events
75 * @param listener the listener
77 public void removeEventListener(RadioThermostatEventListener listener) {
78 listeners.remove(listener);
82 * Send an asynchronous http call to the thermostat, the response will be send to the
83 * event listeners as a RadioThermostat event when it is finally received
85 * @param resource the url of the json resource on the thermostat
87 public void getAsyncThermostatData(String resource) {
88 httpClient.newRequest(buildRequestURL(resource)).method(GET).timeout(30, TimeUnit.SECONDS)
89 .send(new BufferingResponseListener() {
91 public void onComplete(@Nullable Result result) {
92 if (result != null && !result.isFailed()) {
93 dispatchKeyValue(resource, getContentAsString());
95 dispatchKeyValue(KEY_ERROR, BLANK);
102 * Sends a command to the thermostat
104 * @param cmdKey the JSON attribute key for the value to be updated
105 * @param cmdVal the value to be updated in the thermostat
106 * @param resource the end point URI to use for the command
107 * @return the JSON response string from the thermostat
109 public String sendCommand(String cmdKey, @Nullable String cmdVal, String resource) {
110 return sendCommand(cmdKey, cmdVal, null, resource);
114 * Sends a command to the thermostat
116 * @param cmdKey the JSON attribute key for the value to be updated
117 * @param cmdVal the value to be updated in the thermostat
118 * @param cmdJson JSON string to send directly to the thermostat instead of a key/value pair
119 * @param resource the end point URI to use for the command
120 * @return the JSON response string from the thermostat
122 public String sendCommand(@Nullable String cmdKey, @Nullable String cmdVal, @Nullable String cmdJson,
124 // if we got a cmdJson string send that, otherwise build the json from the key and val params
125 String postJson = cmdJson != null ? cmdJson : "{\"" + cmdKey + "\":" + cmdVal + "}";
128 Request request = httpClient.POST(buildRequestURL(resource)).timeout(REQUEST_TIMEOUT_MS,
129 TimeUnit.MILLISECONDS);
130 request.header(HttpHeader.ACCEPT, "text/plain");
131 request.header(HttpHeader.CONTENT_TYPE, "text/plain");
132 request.content(new StringContentProvider(postJson), "application/json");
133 logger.trace("Sending POST request to '{}', data: {}", resource, postJson);
135 ContentResponse contentResponse = request.send();
137 if (contentResponse.getStatus() != OK_200) {
138 throw new RadioThermostatHttpException(
139 "Thermostat HTTP response code was: " + contentResponse.getStatus());
142 logger.trace("Response: {}", contentResponse.getContentAsString());
143 return contentResponse.getContentAsString();
144 } catch (RadioThermostatHttpException | InterruptedException | TimeoutException | ExecutionException e) {
145 logger.debug("Error executing thermostat command: {}, {}", postJson, e.getMessage());
151 * Build request URL from configuration data
153 * @return a valid URL for the thermostat's JSON interface
155 private String buildRequestURL(String resource) {
156 return String.format(URL, hostName, resource);
160 * Dispatch an event (key, value) to the event listeners
163 * @param value the value
165 private void dispatchKeyValue(String key, String value) {
166 RadioThermostatEvent event = new RadioThermostatEvent(this, key, value);
167 for (RadioThermostatEventListener listener : listeners) {
168 listener.onNewMessageEvent(event);