Provide ability to extend StompSubframeEncoder and improve full stomp frame encoding (allocate one buffer for full frame considering the size of the headers) (#10778)
Motivation:
At the moment `StompSubframeEncoder` encode a frame only to `ByteBuf` it is not convenient if further we need to convert it to another type of message, e.g. `WebSocketFrame`. Also, if we send a full frame, it splits into two headers and a content what makes it difficult to convert it in the next handler.
Modification:
Introduce additional converter methods e.g. (`Object protected convertFullFrame(StompFrame original, ByteBuf encoded`)...) for extending encoder functionality and allocate only one `ByteBuf` for full stomp frame. Change headers size calculation, previously used only 256 bytes that reallocate a new buffer each time when headers size more than this threshold. Add `StompEncoderBenchmark`.
Result:
Improved `StompSubframeEncoder` fro extensions.
Previous version benchmark
```
Benchmark (contentLength) (headersType) (pooledAllocator) Mode Cnt Score Error Units
StompEncoderBenchmark.writeStompFrame 0 ONE true thrpt 10 4432132.884 ± 178923.436 ops/s
StompEncoderBenchmark.writeStompFrame 0 ONE false thrpt 10 1281122.756 ± 52484.174 ops/s
StompEncoderBenchmark.writeStompFrame 0 THREE true thrpt 10 2980897.937 ± 130253.049 ops/s
StompEncoderBenchmark.writeStompFrame 0 THREE false thrpt 10 1116883.574 ± 35471.482 ops/s
StompEncoderBenchmark.writeStompFrame 0 SEVEN true thrpt 10 1988012.159 ± 74352.450 ops/s
StompEncoderBenchmark.writeStompFrame 0 SEVEN false thrpt 10 881772.343 ± 94633.870 ops/s
StompEncoderBenchmark.writeStompFrame 0 ELEVEN true thrpt 10 1048125.919 ± 151053.902 ops/s
StompEncoderBenchmark.writeStompFrame 0 ELEVEN false thrpt 10 429900.066 ± 47956.661 ops/s
StompEncoderBenchmark.writeStompFrame 0 TWENTY true thrpt 10 660584.122 ± 104973.439 ops/s
StompEncoderBenchmark.writeStompFrame 0 TWENTY false thrpt 10 278255.488 ± 20143.708 ops/s
StompEncoderBenchmark.writeStompFrame 10 ONE true thrpt 10 4251498.549 ± 625050.979 ops/s
StompEncoderBenchmark.writeStompFrame 10 ONE false thrpt 10 1214006.861 ± 60421.601 ops/s
StompEncoderBenchmark.writeStompFrame 10 THREE true thrpt 10 3117736.486 ± 173613.974 ops/s
StompEncoderBenchmark.writeStompFrame 10 THREE false thrpt 10 1046605.891 ± 94428.064 ops/s
StompEncoderBenchmark.writeStompFrame 10 SEVEN true thrpt 10 2006986.881 ± 108456.748 ops/s
StompEncoderBenchmark.writeStompFrame 10 SEVEN false thrpt 10 877983.112 ± 82919.387 ops/s
StompEncoderBenchmark.writeStompFrame 10 ELEVEN true thrpt 10 1132844.437 ± 84578.571 ops/s
StompEncoderBenchmark.writeStompFrame 10 ELEVEN false thrpt 10 429334.649 ± 35403.161 ops/s
StompEncoderBenchmark.writeStompFrame 10 TWENTY true thrpt 10 657093.390 ± 48092.947 ops/s
StompEncoderBenchmark.writeStompFrame 10 TWENTY false thrpt 10 252140.876 ± 37337.255 ops/s
StompEncoderBenchmark.writeStompFrame 100 ONE true thrpt 10 4720507.067 ± 100993.908 ops/s
StompEncoderBenchmark.writeStompFrame 100 ONE false thrpt 10 1266182.925 ± 85888.413 ops/s
StompEncoderBenchmark.writeStompFrame 100 THREE true thrpt 10 2898746.621 ± 452579.753 ops/s
StompEncoderBenchmark.writeStompFrame 100 THREE false thrpt 10 1019555.288 ± 65640.507 ops/s
StompEncoderBenchmark.writeStompFrame 100 SEVEN true thrpt 10 2259187.459 ± 20025.989 ops/s
StompEncoderBenchmark.writeStompFrame 100 SEVEN false thrpt 10 896405.412 ± 53750.148 ops/s
StompEncoderBenchmark.writeStompFrame 100 ELEVEN true thrpt 10 1110670.772 ± 107650.327 ops/s
StompEncoderBenchmark.writeStompFrame 100 ELEVEN false thrpt 10 445187.398 ± 28845.959 ops/s
StompEncoderBenchmark.writeStompFrame 100 TWENTY true thrpt 10 611506.846 ± 25304.240 ops/s
StompEncoderBenchmark.writeStompFrame 100 TWENTY false thrpt 10 247687.007 ± 43471.578 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ONE true thrpt 10 4140949.576 ± 270274.087 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ONE false thrpt 10 1154515.598 ± 134413.876 ops/s
StompEncoderBenchmark.writeStompFrame 1000 THREE true thrpt 10 3349996.875 ± 162309.889 ops/s
StompEncoderBenchmark.writeStompFrame 1000 THREE false thrpt 10 1141040.562 ± 5895.693 ops/s
StompEncoderBenchmark.writeStompFrame 1000 SEVEN true thrpt 10 2184632.248 ± 8957.833 ops/s
StompEncoderBenchmark.writeStompFrame 1000 SEVEN false thrpt 10 959545.704 ± 5835.161 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ELEVEN true thrpt 10 1081113.327 ± 3957.527 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ELEVEN false thrpt 10 467524.660 ± 1383.236 ops/s
StompEncoderBenchmark.writeStompFrame 1000 TWENTY true thrpt 10 568411.797 ± 108712.493 ops/s
StompEncoderBenchmark.writeStompFrame 1000 TWENTY false thrpt 10 260764.231 ± 43149.129 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ONE true thrpt 10 4369787.147 ± 619367.939 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ONE false thrpt 10 1246782.845 ± 47468.764 ops/s
StompEncoderBenchmark.writeStompFrame 10000 THREE true thrpt 10 3333328.810 ± 253061.481 ops/s
StompEncoderBenchmark.writeStompFrame 10000 THREE false thrpt 10 1108278.988 ± 81905.149 ops/s
StompEncoderBenchmark.writeStompFrame 10000 SEVEN true thrpt 10 2062961.266 ± 247096.284 ops/s
StompEncoderBenchmark.writeStompFrame 10000 SEVEN false thrpt 10 925199.985 ± 36734.594 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ELEVEN true thrpt 10 1223240.034 ± 58833.801 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ELEVEN false thrpt 10 460864.117 ± 2361.459 ops/s
StompEncoderBenchmark.writeStompFrame 10000 TWENTY true thrpt 10 655864.762 ± 35237.335 ops/s
StompEncoderBenchmark.writeStompFrame 10000 TWENTY false thrpt 10 286388.865 ± 1002.460 ops/s
```
A new version benchmark
```
Benchmark (contentLength) (headersType) (pooledAllocator) Mode Cnt Score Error Units
StompEncoderBenchmark.writeStompFrame 0 ONE true thrpt 10 4366110.018 ± 420377.867 ops/s
StompEncoderBenchmark.writeStompFrame 0 ONE false thrpt 10 1289437.153 ± 215271.656 ops/s
StompEncoderBenchmark.writeStompFrame 0 THREE true thrpt 10 2818791.355 ± 218894.471 ops/s
StompEncoderBenchmark.writeStompFrame 0 THREE false thrpt 10 1040151.615 ± 75352.695 ops/s
StompEncoderBenchmark.writeStompFrame 0 SEVEN true thrpt 10 1842144.001 ± 94668.864 ops/s
StompEncoderBenchmark.writeStompFrame 0 SEVEN false thrpt 10 916742.825 ± 65467.820 ops/s
StompEncoderBenchmark.writeStompFrame 0 ELEVEN true thrpt 10 1310454.012 ± 100747.490 ops/s
StompEncoderBenchmark.writeStompFrame 0 ELEVEN false thrpt 10 679934.001 ± 82168.249 ops/s
StompEncoderBenchmark.writeStompFrame 0 TWENTY true thrpt 10 746867.549 ± 68373.269 ops/s
StompEncoderBenchmark.writeStompFrame 0 TWENTY false thrpt 10 483316.314 ± 50978.009 ops/s
StompEncoderBenchmark.writeStompFrame 10 ONE true thrpt 10 4791698.722 ± 263890.510 ops/s
StompEncoderBenchmark.writeStompFrame 10 ONE false thrpt 10 1289877.116 ± 128677.185 ops/s
StompEncoderBenchmark.writeStompFrame 10 THREE true thrpt 10 2984662.187 ± 395567.524 ops/s
StompEncoderBenchmark.writeStompFrame 10 THREE false thrpt 10 1079028.782 ± 43548.555 ops/s
StompEncoderBenchmark.writeStompFrame 10 SEVEN true thrpt 10 1806763.709 ± 59162.209 ops/s
StompEncoderBenchmark.writeStompFrame 10 SEVEN false thrpt 10 935274.980 ± 22064.148 ops/s
StompEncoderBenchmark.writeStompFrame 10 ELEVEN true thrpt 10 1284172.151 ± 119068.047 ops/s
StompEncoderBenchmark.writeStompFrame 10 ELEVEN false thrpt 10 687174.498 ± 30270.916 ops/s
StompEncoderBenchmark.writeStompFrame 10 TWENTY true thrpt 10 803843.483 ± 29106.133 ops/s
StompEncoderBenchmark.writeStompFrame 10 TWENTY false thrpt 10 502134.552 ± 23653.215 ops/s
StompEncoderBenchmark.writeStompFrame 100 ONE true thrpt 10 4337438.694 ± 378524.452 ops/s
StompEncoderBenchmark.writeStompFrame 100 ONE false thrpt 10 1289174.213 ± 50640.853 ops/s
StompEncoderBenchmark.writeStompFrame 100 THREE true thrpt 10 3232767.156 ± 311934.194 ops/s
StompEncoderBenchmark.writeStompFrame 100 THREE false thrpt 10 1115247.028 ± 15683.477 ops/s
StompEncoderBenchmark.writeStompFrame 100 SEVEN true thrpt 10 2213147.232 ± 86326.187 ops/s
StompEncoderBenchmark.writeStompFrame 100 SEVEN false thrpt 10 901120.188 ± 71344.491 ops/s
StompEncoderBenchmark.writeStompFrame 100 ELEVEN true thrpt 10 1238317.714 ± 68148.477 ops/s
StompEncoderBenchmark.writeStompFrame 100 ELEVEN false thrpt 10 671336.339 ± 72735.337 ops/s
StompEncoderBenchmark.writeStompFrame 100 TWENTY true thrpt 10 754565.791 ± 28574.382 ops/s
StompEncoderBenchmark.writeStompFrame 100 TWENTY false thrpt 10 498939.383 ± 38146.118 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ONE true thrpt 10 3722594.471 ± 515861.000 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ONE false thrpt 10 1265629.633 ± 84113.347 ops/s
StompEncoderBenchmark.writeStompFrame 1000 THREE true thrpt 10 2829696.349 ± 172520.267 ops/s
StompEncoderBenchmark.writeStompFrame 1000 THREE false thrpt 10 1111454.609 ± 26275.913 ops/s
StompEncoderBenchmark.writeStompFrame 1000 SEVEN true thrpt 10 1901506.449 ± 37701.353 ops/s
StompEncoderBenchmark.writeStompFrame 1000 SEVEN false thrpt 10 912528.888 ± 46221.215 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ELEVEN true thrpt 10 1299674.123 ± 21889.002 ops/s
StompEncoderBenchmark.writeStompFrame 1000 ELEVEN false thrpt 10 724527.644 ± 2757.370 ops/s
StompEncoderBenchmark.writeStompFrame 1000 TWENTY true thrpt 10 811389.799 ± 2606.626 ops/s
StompEncoderBenchmark.writeStompFrame 1000 TWENTY false thrpt 10 504955.449 ± 6737.804 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ONE true thrpt 10 3837912.649 ± 380742.919 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ONE false thrpt 10 1375544.306 ± 3157.068 ops/s
StompEncoderBenchmark.writeStompFrame 10000 THREE true thrpt 10 3224743.448 ± 297369.719 ops/s
StompEncoderBenchmark.writeStompFrame 10000 THREE false thrpt 10 1125772.007 ± 4051.498 ops/s
StompEncoderBenchmark.writeStompFrame 10000 SEVEN true thrpt 10 2127352.136 ± 106787.777 ops/s
StompEncoderBenchmark.writeStompFrame 10000 SEVEN false thrpt 10 934848.418 ± 4564.147 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ELEVEN true thrpt 10 1379672.772 ± 8778.640 ops/s
StompEncoderBenchmark.writeStompFrame 10000 ELEVEN false thrpt 10 723169.459 ± 2317.767 ops/s
StompEncoderBenchmark.writeStompFrame 10000 TWENTY true thrpt 10 802275.113 ± 4155.137 ops/s
StompEncoderBenchmark.writeStompFrame 10000 TWENTY false thrpt 10 517604.265 ± 3398.384 ops/s
```
For headers over 256 bytes we get a speedup.
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