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core: Make topological sort result deterministic

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This commit is contained in:
Andras Slemmer 2016-09-08 10:15:59 +01:00
parent 5596ced5c3
commit 8e6198cf91
1 changed files with 2 additions and 1 deletions
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core/src/main/kotlin/com/r3corda/protocols/ResolveTransactionsProtocol.kt
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@ -39,7 +39,8 @@ class ResolveTransactionsProtocol(private val txHashes: Set<SecureHash>,
val forwardGraph = HashMap<SecureHash, HashSet<SignedTransaction>>()
transactions.forEach { tx ->
tx.tx.inputs.forEach { input ->
forwardGraph.getOrPut(input.txhash) { HashSet() }.add(tx)
// Note that we use a LinkedHashSet here to make the traversal deterministic (as long as the input list is)
forwardGraph.getOrPut(input.txhash) { LinkedHashSet() }.add(tx)
}
}