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cpark driver for Drivewyze Central Park API
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70 changes: 70 additions & 0 deletions
70
src/us/mn/state/dot/tms/server/comm/cpark/CParkPoller.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * IRIS -- Intelligent Roadway Information System | ||
| * Copyright (C) 2025 Minnesota Department of Transportation | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| */ | ||
| package us.mn.state.dot.tms.server.comm.cpark; | ||
|
|
||
| import us.mn.state.dot.sched.DebugLog; | ||
| import us.mn.state.dot.tms.CommLink; | ||
| import us.mn.state.dot.tms.DeviceRequest; | ||
| import us.mn.state.dot.tms.server.ControllerImpl; | ||
| import us.mn.state.dot.tms.server.comm.SamplePoller; | ||
| import us.mn.state.dot.tms.server.comm.ThreadedPoller; | ||
| import static us.mn.state.dot.tms.utils.URIUtil.HTTPS; | ||
|
|
||
| /** | ||
| * CParkPoller is a reader for Drivewyze Central Park JSON. | ||
| * | ||
| * @author Douglas Lau | ||
| */ | ||
| public class CParkPoller extends ThreadedPoller<CParkProp> | ||
| implements SamplePoller | ||
| { | ||
| /** Central park debug log */ | ||
| static private final DebugLog CPARK_LOG = new DebugLog("cpark"); | ||
|
|
||
| /** Log a message to the debug log */ | ||
| static public void slog(String msg) { | ||
| CPARK_LOG.log(msg); | ||
| } | ||
|
|
||
| /** Create a new CPark poller */ | ||
| public CParkPoller(CommLink link) { | ||
| super(link, HTTPS, CPARK_LOG); | ||
| } | ||
|
|
||
| /** Create a comm thread */ | ||
| @Override | ||
| protected CParkThread createCommThread(String uri, int timeout, | ||
| int nrd) | ||
| { | ||
| return new CParkThread(this, queue, scheme, uri, timeout, nrd, | ||
| CPARK_LOG); | ||
| } | ||
|
|
||
| /** Send device request to a controller. | ||
| * @param c Controller to poll. */ | ||
| @Override | ||
| public void sendRequest(ControllerImpl c, DeviceRequest r) { | ||
| // nothing to do? | ||
| } | ||
|
|
||
| /** Query sample data. | ||
| * @param c Controller to poll. | ||
| * @param per_sec Sample period in seconds. */ | ||
| @Override | ||
| public void querySamples(ControllerImpl c, int per_sec) { | ||
| if (c.getPollPeriodSec() == per_sec) | ||
| addOp(new OpQuerySpots(c, per_sec)); | ||
| } | ||
| } |
124 changes: 124 additions & 0 deletions
124
src/us/mn/state/dot/tms/server/comm/cpark/CParkProp.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,124 @@ | ||
| /* | ||
| * IRIS -- Intelligent Roadway Information System | ||
| * Copyright (C) 2025 Minnesota Department of Transportation | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| */ | ||
| package us.mn.state.dot.tms.server.comm.cpark; | ||
|
|
||
| import java.io.InputStream; | ||
| import java.io.InputStreamReader; | ||
| import java.io.IOException; | ||
| import org.json.JSONException; | ||
| import org.json.JSONObject; | ||
| import us.mn.state.dot.sched.TimeSteward; | ||
| import static us.mn.state.dot.tms.server.Constants.MISSING_DATA; | ||
| import us.mn.state.dot.tms.server.ControllerImpl; | ||
| import us.mn.state.dot.tms.server.comm.ControllerProperty; | ||
| import us.mn.state.dot.tms.server.comm.Operation; | ||
| import us.mn.state.dot.tms.server.comm.ParsingException; | ||
| import us.mn.state.dot.tms.server.comm.ProtocolException; | ||
|
|
||
| /** | ||
| * Available spots property. | ||
| * | ||
| * @author Douglas Lau | ||
| */ | ||
| public class CParkProp extends ControllerProperty { | ||
|
|
||
| /** Time stamp */ | ||
| private final long stamp; | ||
|
|
||
| /** Get timestamp at end of interval */ | ||
| public long getTime() { | ||
| return stamp; | ||
| } | ||
|
|
||
| /** Sample perdiod */ | ||
| private final int per_sec; | ||
|
|
||
| /** Get the interval period (sec) */ | ||
| public int getPeriod() { | ||
| return per_sec; | ||
| } | ||
|
|
||
| /** Parking spot occupancy array */ | ||
| private final int[] scans = new int[64]; | ||
|
|
||
| /** Get parking spot occupancy array */ | ||
| public int[] getScans() { | ||
| return scans; | ||
| } | ||
|
|
||
| /** Create an available spots property */ | ||
| public CParkProp(int p) { | ||
| stamp = TimeSteward.currentTimeMillis(); | ||
| per_sec = p; | ||
| for (int i = 0; i < scans.length; i++) | ||
| scans[i] = MISSING_DATA; | ||
| } | ||
|
|
||
| /** Decode a QUERY response */ | ||
| @Override | ||
| public void decodeQuery(ControllerImpl c, InputStream is) | ||
| throws IOException | ||
| { | ||
| try { | ||
| JSONObject jo = new JSONObject(parseResp(is)); | ||
| for (int i = 0; i < 64; i++) { | ||
| String key = String.valueOf(i + 1); | ||
| JSONObject spot = jo.optJSONObject(key); | ||
| if (spot != null) | ||
| parseSpot(i, spot); | ||
| } | ||
| } | ||
| catch (JSONException e) { | ||
| throw new ParsingException("JSON: " + e.getMessage()); | ||
| } | ||
| } | ||
|
|
||
| /** Parse parking spot object */ | ||
| private void parseSpot(int i, JSONObject spot) { | ||
| try { | ||
| boolean available = spot.getBoolean("available"); | ||
| scans[i] = (available) ? 0 : 1; | ||
| CParkPoller.slog("spot:" + i + ", " + available); | ||
| int duration = spot.getInt("duration"); | ||
| CParkPoller.slog("duration: " + duration); | ||
| } | ||
| catch (JSONException e) { | ||
| // spot not defined | ||
| } | ||
| } | ||
|
|
||
| /** Parse a response */ | ||
| private String parseResp(InputStream is) throws IOException { | ||
| char[] buf = new char[1024]; | ||
| InputStreamReader isr = new InputStreamReader(is); | ||
| StringBuilder res = new StringBuilder(); | ||
| for (int i = 0;; i++) { | ||
| int n = isr.read(buf, 0, 1024); | ||
| if (n < 0) | ||
| break; | ||
| else if (n > 0) | ||
| res.append(buf, 0, n); | ||
| if (i > 100) | ||
| throw new ParsingException("RESP TOO BIG"); | ||
| } | ||
| return res.toString(); | ||
| } | ||
|
|
||
| /** Get a string representation of the property */ | ||
| @Override | ||
| public String toString() { | ||
| return "spots"; | ||
| } | ||
| } |
50 changes: 50 additions & 0 deletions
50
src/us/mn/state/dot/tms/server/comm/cpark/CParkThread.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,50 @@ | ||
| /* | ||
| * IRIS -- Intelligent Roadway Information System | ||
| * Copyright (C) 2025 Minnesota Department of Transportation | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 2 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| */ | ||
| package us.mn.state.dot.tms.server.comm.cpark; | ||
|
|
||
| import java.io.IOException; | ||
| import java.net.URI; | ||
| import us.mn.state.dot.sched.DebugLog; | ||
| import us.mn.state.dot.tms.server.comm.CommThread; | ||
| import us.mn.state.dot.tms.server.comm.Messenger; | ||
| import us.mn.state.dot.tms.server.comm.MessengerException; | ||
| import us.mn.state.dot.tms.server.comm.OpQueue; | ||
|
|
||
| /** | ||
| * CPark thread, used to provide a Messenger with x-access-token header. | ||
| * | ||
| * @author Douglas Lau | ||
| */ | ||
| public class CParkThread extends CommThread<CParkProp> { | ||
|
|
||
| /** Create a new CPark thread */ | ||
| public CParkThread(CParkPoller p, OpQueue<CParkProp> q, URI s, | ||
| String u, int rt, int nrd, DebugLog log) | ||
| { | ||
| super(p, q, s, u, rt, nrd, log); | ||
| } | ||
|
|
||
| /** Create a messenger */ | ||
| @Override | ||
| protected Messenger createMessenger(URI s, String u, int rt, int nrd) | ||
| throws MessengerException, IOException | ||
| { | ||
| return new TokenMessenger( | ||
| Messenger.create(s, u, rt, nrd), | ||
| Messenger.createURI(s, u).toURL(), | ||
| rt | ||
| ); | ||
| } | ||
| } |
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