vert.x Json Value Mapper

A tiny library to map values in Vert.x JsonObject.

Use-case: having JsonObject, using a regular expression, replace all string values to a particular replacement.

implementation 'io.github.privettoli:vertx-json-value-mapper:0.0.1'

Example:

new JsonValueRegexpMapper( <-- not thead-safe object however blocking code in verticle is never executed by multiple threads at the same time
    "^(\\d{4})(\\d{2})(\\d{2})T(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})\\sGMT$",
    "$1-$2-$3T$4:$5:$6.$7Z",
    "19890918T053347.789 GMT".length()
).map(jsonObject) <-- mutates original JsonObject instance

Configuration:

^(\\d{4})(\\d{2})(\\d{2})T(\\d{2})(\\d{2})(\\d{2})\\.(\\d{3})\\sGMT$ <-- pattern

$1-$2-$3T$4:$5:$6.$7Z <-- replacement

23 <-- length

Input:

{
  "requestedCruise": "YACHT_CLUB_TO_SEYCHELLES",
  "attendants": [
    {
      "bender": -1,
      "riskReason": "OD",
      "riskDateTime": "20200310T164621.150 GMT",
      "good": false
    }
  ]
}

Output:

{
  "requestedCruise": "YACHT_CLUB_TO_SEYCHELLES",
  "attendants": [
    {
      "bender": -1,
      "riskReason": "OD",
      "riskDateTime": "2020-03-10T16:46:21.150Z",
      "good": false
    }
  ]
}

Performance:

4 files used for the benchmark:

• pegaSmallPayload.json 506 bytes
• iso8601SmallPayload.json 508 bytes
• pegaBiggerPayload.json 26,085,447 bytes (26.1 MB)
• iso8601BiggerPayload.json 26,085,626 bytes (26.1 MB)

Results:

MacBook Pro 2018 i7-8559U

Intel(R) Core(TM) i7-8559U CPU @ 2.70GHz
16 GB 2133 MHz LPDDR3
macOS Catalina 10.15.6 (19G2021)

openjdk 11.0.7 2020-04-14 HotSpot
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.7+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.7+10, mixed mode)

Benchmark	Mode	Cnt	Score	Error	Units
FromIso8601ToPegaBenchmark.BiggerPayload.biggerPayload	thrpt	25	34.053	± 0.850	ops/s
FromIso8601ToPegaBenchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	848.351	± 19.475	ops/ms
FromPegaToIso8601Benchmark.BiggerPayload.biggerPayload	thrpt	25	34.948	± 1.148	ops/s
FromPegaToIso8601Benchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	729.366	± 10.665	ops/ms

openjdk 11.0.7 2020-04-14 GraalVM
OpenJDK Runtime Environment AdoptOpenJDK (build 11.0.7+10)
OpenJDK 64-Bit Server VM AdoptOpenJDK (build 11.0.7+10, mixed mode)
-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler

Benchmark	Mode	Cnt	Score	Error	Units
FromIso8601ToPegaBenchmark.BiggerPayload.biggerPayload	thrpt	25	56.085	± 1.667	ops/s
FromIso8601ToPegaBenchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	968.307	± 36.925	ops/ms
FromPegaToIso8601Benchmark.BiggerPayload.biggerPayload	thrpt	25	56.756	± 2.085	ops/s
FromPegaToIso8601Benchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	829.512	± 9.401	ops/ms

Home Server Xeon E3-1270 V2

Intel(R) Xeon(R) CPU E3-1270 V2 @ 3.50GHz
32 GB 1600 MHz DDR3
FreeBSD 11.3-RELEASE-p7 amd64

openjdk 11.0.7 2020-04-14 HotSpot
OpenJDK Runtime Environment (build 11.0.7+10-2)
OpenJDK 64-Bit Server VM (build 11.0.7+10-2, mixed mode)

Benchmark	Mode	Cnt	Score	Error	Units
FromIso8601ToPegaBenchmark.BiggerPayload.biggerPayload	thrpt	25	42.193	± 0.686	ops/s
FromIso8601ToPegaBenchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	701.996	± 20.332	ops/ms
FromPegaToIso8601Benchmark.BiggerPayload.biggerPayload	thrpt	25	42.240	± 0.671	ops/s
FromPegaToIso8601Benchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	586.037	± 9.022	ops/ms

openjdk 11.0.7 2020-04-14 GraalVM
OpenJDK Runtime Environment (build 11.0.7+10-2)
OpenJDK 64-Bit Server VM (build 11.0.7+10-2, mixed mode)
-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler

Benchmark	Mode	Cnt	Score	Error	Units
FromIso8601ToPegaBenchmark.BiggerPayload.biggerPayload	thrpt	25	60.188	± 0.582	ops/s
FromIso8601ToPegaBenchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	713.827	± 5.949	ops/ms
FromPegaToIso8601Benchmark.BiggerPayload.biggerPayload	thrpt	25	60.906	± 0.806	ops/s
FromPegaToIso8601Benchmark.SmallJsonPayload.smallJsonPayload	thrpt	25	596.650	± 3.305	ops/ms