Allow to launch host processes

[letmaik]

This PR allows to trigger host processes from an app endpoint. The app endpoint does not block on it.

• What if the host process sends a response back to CCF (via HTTP) and the relevant app endpoint depends on the transaction that triggered the host process being finished/committed? Does it make sense to investigate an after-commit behaviour?

  • This is ok, assumption is that things are idempotent, so retrying a failed request in this situation would be fine.

• To expose it to JS I temporarily expose the node state as a second argument during ccf population. That's a work-around. Related to Make ccf global injection in JS Context modular #2448

[ccf-bot]

letmaik/trigger-host-process-launch@26231 aka 20210528.25 vs main ewma over 20 builds from 25716 to 26210

Click to see table

build_id	build_number	sb_sgx_cft^	sb_sgx_cft_mem	sb_sgx_bft^	sb_sgx_bft_mem	sb_ws_sgx_cft^	sb_ws_sgx_cft_mem	sb_sig_sgx_cft^	sb_sig_sgx_cft_mem	tpcc_sgx_cft^	tpcc_sgx_cft_mem	tpcc_sgx_bft^	tpcc_sgx_bft_mem	ls_sgx_cft^	ls_sgx_cft_mem	ls_ws_sgx_cft^	ls_ws_sgx_cft_mem	ls_jwt_sgx_cft^	ls_jwt_sgx_cft_mem	ls_js_sgx_cft^	ls_js_sgx_cft_mem	ls_full_js_sgx_cft^	ls_full_js_sgx_cft_mem	ls_js_jwt_sgx_cft^	ls_js_jwt_sgx_cft_mem	CHAMP put (/s)^	CHAMP get (/s)^
25716	20210519.7	22345.3	1.27181e+07	13762.4	3.7884e+07	35181.9	1.35046e+07	4992.1	1.03588e+07	6242.47	9.08371e+07	3374.53	1.79442e+08	22289.8	1.71746e+07	29408.7	1.7961e+07	3569.43	1.35046e+07	2226.85	1.19317e+07	1927.99	1.08831e+07	1586.46	8.52384e+06	1.33516e+06	3.61837e+07
25757	20210520.1	28750.5	1.29803e+07	13368.8	3.81461e+07	33061.1	1.32424e+07	4808.4	1.03588e+07	6693.25	9.24099e+07	3384.47	1.63975e+08	22848.2	1.7961e+07	26661.1	1.74367e+07	3864.04	1.45532e+07	2345.45	9.31027e+06	1953.19	1.19317e+07	1609.89	8.2617e+06	1.358e+06	3.62478e+07
25784	20210520.10	28813.3	1.32424e+07	13858.9	3.76218e+07	31661.1	1.32424e+07	4505.42	1.00967e+07	6619.14	9.31964e+07	3217.56	2.03559e+08	22848.3	1.76989e+07	27695.9	1.76989e+07	3958.57	1.40289e+07	2235.92	9.04813e+06	1972.57	8.2617e+06	1587.36	7.99955e+06	1.33602e+06	3.59292e+07
25791	20210520.12	28314.1	1.29803e+07	14255.9	3.84083e+07	33569.7	1.35046e+07	4877.4	1.00967e+07	6454.49	9.08371e+07	3436.58	1.68694e+08	21932.9	1.76989e+07	25918	1.74367e+07	3950.58	1.4291e+07	2343.57	9.04813e+06	1890.49	8.2617e+06	1576.39	8.2617e+06	1.3369e+06	3.59298e+07
25798	20210521.1	29784.3	1.29803e+07	14285.5	3.81461e+07	35436.7	1.35046e+07	5025.47	1.03588e+07	6709.96	9.31964e+07	3445.71	1.54276e+08	22262.4	1.76989e+07	26966.9	1.74367e+07	4331.43	1.45532e+07	2300.82	1.16696e+07	1972.55	8.2617e+06	1574.05	8.2617e+06	1.32986e+06	3.61837e+07
25828	20210524.1	24615.8	1.29803e+07	14315.5	3.86704e+07	28979.7	1.35046e+07	5367.96	1.0621e+07	6603.82	9.24099e+07	3045.14	2.10113e+08	22441.6	1.76989e+07	28015.6	1.76989e+07	3985.86	1.45532e+07	2332.66	9.04813e+06	1978.53	1.08831e+07	1593.94	8.2617e+06	1.33341e+06	3.62478e+07
25892	20210524.17	28415.8	1.29803e+07	13706.4	3.76218e+07	32362.8	1.32424e+07	4932.24	1.03588e+07	6601.99	9.21478e+07	3454.54	1.61354e+08	23448.1	1.71746e+07	29118.9	1.7961e+07	3981.17	1.4291e+07	2309.92	9.31027e+06	1904.21	8.52384e+06	1601.67	8.2617e+06	1.33107e+06	3.61831e+07
25922	20210524.24	26621.4	1.32424e+07	14801	3.94568e+07	32767.8	1.29803e+07	4507.09	1.00967e+07	6500	9.24099e+07	3410.01	1.68956e+08	21317.2	1.76989e+07	26239	1.90096e+07	3974.77	1.50774e+07	2274.32	9.04813e+06	1868.57	7.99955e+06	1543.28	7.99955e+06	1.33263e+06	3.59298e+07
25924	20210525.1	24585	1.32424e+07	14673.4	4.07676e+07	34452.2	1.35046e+07	4677.54	1.0621e+07	6458.61	9.08371e+07	3401.42	1.55849e+08	22346.6	1.76989e+07	27407.5	1.76989e+07	4192.27	1.48153e+07	2290.95	9.04813e+06	1890.92	7.99955e+06	1521.2	8.2617e+06	1.33169e+06	3.62478e+07
25950	20210525.8	29701	1.29803e+07	14828.8	3.7884e+07	28178.7	1.32424e+07	4848.74	1.00967e+07	6754.79	9.34585e+07	3399.8	1.51917e+08	21381	1.71746e+07	28220	1.76989e+07	4354.69	1.48153e+07	2369.51	9.31027e+06	1904.91	1.14074e+07	1576.43	8.2617e+06	1.34014e+06	3.62478e+07
25972	20210525.14	26102.8	1.29803e+07	14213.3	3.84083e+07	33799.1	1.35046e+07	4855.83	1.00967e+07	6533.3	9.34585e+07	3367.65	1.59519e+08	21829.8	1.74367e+07	26614.7	1.76989e+07	4055.18	1.40289e+07	2284.09	9.04813e+06	1961.1	1.08831e+07	1514.05	8.2617e+06	1.33742e+06	3.62478e+07
26015	20210526.1	28345.4	1.32424e+07	13734	3.76218e+07	32508.2	1.32424e+07	4973.26	1.03588e+07	6303.33	9.03128e+07	3375.28	1.62927e+08	22150.4	1.76989e+07	29280.7	1.7961e+07	4373.44	1.53396e+07	2235.5	9.04813e+06	1971.38	8.2617e+06	1522.55	7.99955e+06	1.33506e+06	3.60563e+07
26041	20210526.8	27187.2	1.29803e+07	14503.2	3.89325e+07	30410.8	1.29803e+07	4776.61	1.00967e+07	6340.49	9.29342e+07	3115.24	2.28725e+08	21214.3	1.74367e+07	27321.7	1.82232e+07	3997.13	1.45532e+07	2242.79	9.04813e+06	1963.34	8.2617e+06	1558.47	8.2617e+06	1.34347e+06	3.5993e+07
26078	20210527.1	26100.9	1.27181e+07	14172.7	3.99811e+07	30328	1.32424e+07	4657.02	1.03588e+07	6805.87	9.21478e+07	3368.66	1.68432e+08	23124.7	1.76989e+07	29315.2	1.76989e+07	4183.67	1.50774e+07	2371.3	9.04813e+06	1902.28	1.08831e+07	1607.54	7.73741e+06	1.35998e+06	3.5993e+07
26094	20210527.6	26953.6	1.32424e+07	14258.4	3.89325e+07	34916.1	1.35046e+07	4618.86	1.00967e+07	6753.28	9.21478e+07	3303.02	1.67383e+08	22963.6	1.76989e+07	27526.9	1.76989e+07	4103.29	1.53396e+07	2392.6	9.31027e+06	1889.39	8.52384e+06	1549.12	8.52384e+06	1.34215e+06	3.61837e+07
26129	20210527.16	25978.6	1.29803e+07	14453.1	4.02433e+07	32342.4	1.32424e+07	5380.65	1.0621e+07	6232.94	9.00506e+07	3403.07	1.59781e+08	23205.4	1.74367e+07	27713.7	1.7961e+07	3972.58	1.48153e+07	2195.9	1.19317e+07	1947.44	8.2617e+06	1567.36	8.52384e+06	1.35118e+06	3.59292e+07
26149	20210528.1	27586.1	1.29803e+07	14627	3.91947e+07	34068.6	1.32424e+07	4942.58	1.03588e+07	6661.95	9.31964e+07	3421.13	1.68956e+08	21786	1.71746e+07	28018.7	1.76989e+07	4195.31	1.48153e+07	2269.33	9.31027e+06	1878.19	8.2617e+06	1553.12	8.2617e+06	1.35944e+06	3.53713e+07
26160	20210528.4	26202.4	1.27181e+07	14699.7	3.89325e+07	33541.9	1.35046e+07	5371.54	1.03588e+07	6486.65	9.24099e+07	3411.07	1.79966e+08	24478.4	1.76989e+07	26688	1.74367e+07	4239.8	1.48153e+07	2366.35	9.04813e+06	1909.24	8.2617e+06	1562.45	8.2617e+06	1.32342e+06	3.56788e+07
26178	20210528.9	25372.6	1.29803e+07	14847.2	3.81461e+07	33965.5	1.40289e+07	4860.2	1.16696e+07	6704.92	9.29342e+07	3146.53	1.99627e+08	21755.8	1.71746e+07	27319.4	1.82232e+07	4099.01	1.45532e+07	2331.02	9.04813e+06	1925.04	1.14074e+07	1511.59	8.2617e+06	1.34532e+06	3.62471e+07
26210	20210528.19	27076.8	1.32424e+07	14147	3.89325e+07	33103.1	1.35046e+07	5340.75	1.08831e+07	6559.34	9.21478e+07	3425.24	1.70791e+08	22975	1.74367e+07	27203.1	1.76989e+07	3997.61	1.48153e+07	2374.39	9.04813e+06	1957.65	1.08831e+07	1517.77	7.99955e+06	1.31593e+06	3.61199e+07

[achamayou]

This looks good to me, as discussed it would be easier and preferable to use libuv to manage spawning and reaping processes.

The execution is best triggered in the transaction itself rather than hooks, so long as it is idempotent there will be no functional ill-effects.