aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/OpenSim/Region/ScriptEngine/Common/ScriptEngineBase/AsyncLSLCommandManager.cs
blob: 04916123870326261004fca7bc705e3a0eac26d2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
/*
* Copyright (c) Contributors, http://opensimulator.org/
* See CONTRIBUTORS.TXT for a full list of copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above copyright
*       notice, this list of conditions and the following disclaimer in the
*       documentation and/or other materials provided with the distribution.
*     * Neither the name of the OpenSim Project nor the
*       names of its contributors may be used to endorse or promote products
*       derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS AS IS AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* 
*/

using System;
using System.Collections.Generic;
using System.Threading;
using libsecondlife;
using OpenSim.Region.Environment.Interfaces;
using OpenSim.Region.Environment.Modules;

namespace OpenSim.Region.ScriptEngine.Common.ScriptEngineBase
{
    /// <summary>
    /// Handles LSL commands that takes long time and returns an event, for example timers, HTTP requests, etc.
    /// </summary>
    public class AsyncLSLCommandManager : iScriptEngineFunctionModule
    {
        private Thread cmdHandlerThread;
        private int cmdHandlerThreadCycleSleepms;

        private ScriptEngine m_ScriptEngine;

        public AsyncLSLCommandManager(ScriptEngine _ScriptEngine)
        {
            m_ScriptEngine = _ScriptEngine;
            ReadConfig();

            // Start the thread that will be doing the work
            cmdHandlerThread = new Thread(CmdHandlerThreadLoop);
            cmdHandlerThread.Name = "CmdHandlerThread";
            cmdHandlerThread.Priority = ThreadPriority.BelowNormal;
            cmdHandlerThread.IsBackground = true;
            cmdHandlerThread.Start();
        }

        public void ReadConfig()
        {
            cmdHandlerThreadCycleSleepms = m_ScriptEngine.ScriptConfigSource.GetInt("AsyncLLCommandLoopms", 50);
        }


        ~AsyncLSLCommandManager()
        {
            // Shut down thread
            try
            {
                if (cmdHandlerThread != null)
                {
                    if (cmdHandlerThread.IsAlive == true)
                    {
                        cmdHandlerThread.Abort();
                        cmdHandlerThread.Join();
                    }
                }
            }
            catch
            {
            }
        }

        private void CmdHandlerThreadLoop()
        {
            while (true)
            {
                // Check timers
                CheckTimerEvents();
                Thread.Sleep(25);
                // Check HttpRequests
                CheckHttpRequests();
                Thread.Sleep(25);
                // Check XMLRPCRequests
                CheckXMLRPCRequests();
                Thread.Sleep(25);
                // Check Listeners
                CheckListeners();
                Thread.Sleep(25);

                // Sleep before next cycle
                //Thread.Sleep(cmdHandlerThreadCycleSleepms);
            }
        }

        /// <summary>
        /// Remove a specific script (and all its pending commands)
        /// </summary>
        /// <param name="m_localID"></param>
        /// <param name="m_itemID"></param>
        public void RemoveScript(uint localID, LLUUID itemID)
        {
            // Remove a specific script

            // Remove from: Timers
            UnSetTimerEvents(localID, itemID);
            // Remove from: HttpRequest
            IHttpRequests iHttpReq =
                m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();
            iHttpReq.StopHttpRequest(localID, itemID);

            IWorldComm comms = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();
            comms.DeleteListener(itemID);

            IXMLRPC xmlrpc = m_ScriptEngine.World.RequestModuleInterface<IXMLRPC>();
            xmlrpc.DeleteChannels(itemID);

            xmlrpc.CancelSRDRequests(itemID);
    
        }

        #region TIMER

        //
        // TIMER
        //
        private class TimerClass
        {
            public uint localID;
            public LLUUID itemID;
            public double interval;
            public DateTime next;
        }

        private List<TimerClass> Timers = new List<TimerClass>();
        private object TimerListLock = new object();

        public void SetTimerEvent(uint m_localID, LLUUID m_itemID, double sec)
        {
            Console.WriteLine("SetTimerEvent");

            // Always remove first, in case this is a re-set
            UnSetTimerEvents(m_localID, m_itemID);
            if (sec == 0) // Disabling timer
                return;

            // Add to timer
            TimerClass ts = new TimerClass();
            ts.localID = m_localID;
            ts.itemID = m_itemID;
            ts.interval = sec;
            ts.next = DateTime.Now.ToUniversalTime().AddSeconds(ts.interval);
            lock (TimerListLock)
            {
                Timers.Add(ts);
            }
        }

        public void UnSetTimerEvents(uint m_localID, LLUUID m_itemID)
        {
            // Remove from timer
            lock (TimerListLock)
            {
                List<TimerClass> NewTimers = new List<TimerClass>();
                foreach (TimerClass ts in Timers)
                {
                    if (ts.localID != m_localID && ts.itemID != m_itemID)
                    {
                        NewTimers.Add(ts);
                    }
                }
                Timers.Clear();
                Timers = NewTimers;
            }
        }

        public void CheckTimerEvents()
        {
            // Nothing to do here?
            if (Timers.Count == 0)
                return;

            lock (TimerListLock)
            {
                // Go through all timers
                foreach (TimerClass ts in Timers)
                {
                    // Time has passed?
                    if (ts.next.ToUniversalTime() < DateTime.Now.ToUniversalTime())
                    {
                        // Add it to queue
                        m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(ts.localID, ts.itemID, "timer", EventQueueManager.llDetectNull, 
                                                                            new object[] {});
                        // set next interval


                        ts.next = DateTime.Now.ToUniversalTime().AddSeconds(ts.interval);
                    }
                }
            } // lock
        }

        #endregion

        #region HTTP REQUEST

        public void CheckHttpRequests()
        {
            if (m_ScriptEngine.World == null)
                return;

            IHttpRequests iHttpReq =
                m_ScriptEngine.World.RequestModuleInterface<IHttpRequests>();

            HttpRequestClass httpInfo = null;

            if (iHttpReq != null)
                httpInfo = iHttpReq.GetNextCompletedRequest();

            while (httpInfo != null)
            {
                //Console.WriteLine("PICKED HTTP REQ:" + httpInfo.response_body + httpInfo.status);

                // Deliver data to prim's remote_data handler
                //
                // TODO: Returning null for metadata, since the lsl function
                // only returns the byte for HTTP_BODY_TRUNCATED, which is not
                // implemented here yet anyway.  Should be fixed if/when maxsize
                // is supported

                if (m_ScriptEngine.m_ScriptManager.GetScript(httpInfo.localID, httpInfo.itemID) != null)
                {
                    iHttpReq.RemoveCompletedRequest(httpInfo.reqID);
                    object[] resobj = new object[]
                    {
                        httpInfo.reqID.ToString(), httpInfo.status, null, httpInfo.response_body
                    };

                    m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(
                        httpInfo.localID, httpInfo.itemID, "http_response", EventQueueManager.llDetectNull, resobj
                    );

                }

                httpInfo = iHttpReq.GetNextCompletedRequest();

            }
        }

        #endregion

        #region Check llRemoteData channels

        public void CheckXMLRPCRequests()
        {
            if (m_ScriptEngine.World == null)
                return;

            IXMLRPC xmlrpc = m_ScriptEngine.World.RequestModuleInterface<IXMLRPC>();

            if (xmlrpc != null)
            {
                RPCRequestInfo rInfo = xmlrpc.GetNextCompletedRequest();

                while (rInfo != null)
                {
                    if (m_ScriptEngine.m_ScriptManager.GetScript(rInfo.GetLocalID(), rInfo.GetItemID()) != null)
                    {
                        xmlrpc.RemoveCompletedRequest(rInfo.GetMessageID());

                        //Deliver data to prim's remote_data handler
                        object[] resobj = new object[]
                        {
                            2, rInfo.GetChannelKey().ToString(), rInfo.GetMessageID().ToString(), String.Empty,
                            rInfo.GetIntValue(),
                            rInfo.GetStrVal()
                        };
                        m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(
                            rInfo.GetLocalID(), rInfo.GetItemID(), "remote_data", EventQueueManager.llDetectNull, resobj
                        );

                    }

                    rInfo = xmlrpc.GetNextCompletedRequest();

                }

                SendRemoteDataRequest srdInfo = xmlrpc.GetNextCompletedSRDRequest();

                while (srdInfo != null)
                {
                    if (m_ScriptEngine.m_ScriptManager.GetScript(srdInfo.m_localID, srdInfo.m_itemID) != null)
                    {
                        xmlrpc.RemoveCompletedSRDRequest(srdInfo.GetReqID());

                        //Deliver data to prim's remote_data handler
                        object[] resobj = new object[]
                        {
                            3, srdInfo.channel.ToString(), srdInfo.GetReqID().ToString(), String.Empty,
                            srdInfo.idata,
                            srdInfo.sdata
                        };
                        m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(
                            srdInfo.m_localID, srdInfo.m_itemID, "remote_data", EventQueueManager.llDetectNull, resobj
                        );

                    }

                    srdInfo = xmlrpc.GetNextCompletedSRDRequest();

                }

            
            }
        }

        #endregion

        #region Check llListeners

        public void CheckListeners()
        {
            if (m_ScriptEngine.World == null)
                return;
            IWorldComm comms = m_ScriptEngine.World.RequestModuleInterface<IWorldComm>();

            if (comms != null)
            {
                while (comms.HasMessages())
                {
                    if (m_ScriptEngine.m_ScriptManager.GetScript(
                        comms.PeekNextMessageLocalID(), comms.PeekNextMessageItemID()) != null)
                    {
                        ListenerInfo lInfo = comms.GetNextMessage();

                        //Deliver data to prim's listen handler
                        object[] resobj = new object[]
                        {
                            lInfo.GetChannel(), lInfo.GetName(), lInfo.GetID().ToString(), lInfo.GetMessage()
                        };

                        m_ScriptEngine.m_EventQueueManager.AddToScriptQueue(
                            lInfo.GetLocalID(), lInfo.GetItemID(), "listen", EventQueueManager.llDetectNull, resobj
                        );
                    }

               }
            }
        }

        #endregion

        /// <summary>
        /// If set to true then threads and stuff should try to make a graceful exit
        /// </summary>
        public bool PleaseShutdown
        {
            get { return _PleaseShutdown; }
            set { _PleaseShutdown = value; }
        }
        private bool _PleaseShutdown = false;

    }
}