core: TSID now can use a preconfigured random seed using TSID_SEED, g…

…ood for test data
codeborne · Feb 16, 2025 · ea1bd59 · ea1bd59
1 parent 950a22a
commit ea1bd59
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,5 +1,6 @@
 # Unreleased
 * jdbc: add helpful details to Postgres exception "no hstore extension installed"
+* core: TSID now can use a preconfigured random seed using TSID_SEED, good for test data
 * json: TSGenerator updates
   * outputs records and arrays with shorter syntax, primarily to prevent records of enums from being exhaustive
   * outputs provided custom types as separate types and references them

diff --git a/core/src/TSID.kt b/core/src/TSID.kt
@@ -14,7 +14,7 @@ import java.util.concurrent.atomic.AtomicInteger
     const val RANDOM_BITS = 22
     const val RANDOM_MASK = 0x003fffff
     val EPOCH = Instant.parse(Config.optional("TSID_EPOCH", "2022-10-21T03:45:00.000Z")).toEpochMilli()
-    val random = SecureRandom()
+    val random = Config.optional("TSID_SEED")?.toByteArray()?.let { SecureRandom(it) } ?: SecureRandom()
     val counter = AtomicInteger()
     @Volatile var lastTime = 0L