Custom trigger: beforeCommit not containing basic transaction info like username on docker

[cuenta_chou]

Dear all,

I am building a plugin that creates a trigger to processes transaction data (created/updated/deleted nodes and relationships) and forwards events into an AMQ.
I am using the latest neo4j version (4.1.3), and I have encountered the following problem:

When the beforeCommit method is called, if I retrieve the username from the TransactionData object passed to the method on my local machine, I am able to get the username under which authorization state this transaction is running. The problem happens when the exact same code is executed on the out-of-the-box docker image. On this scenario, the username returned is always empty.

neo4j.com

TransactionData (Neo4j 4.1.3 API)

@Override
public Object beforeCommit( TransactionData data, Transaction transaction, GraphDatabaseService databaseService ) throws Exception
{      logger.info(data.getUsername() }

Any ideas about why this is happening?
Many thanks!
Regards

[anthapu · Accepted solution]

Do you have authentication enabled on the docker instance?

[cuenta_chou]

Hi! Thanks for the suggestion.
You were right, it seems I missinterpreted the NEO4J_AUTH parameter. I assumed it was used to stablish a password for the default neo4j user, but it seems that when it's set to none, it also sets
dbms.security.auth.enabled=false
as you can see in the following code line 237:

github.com

neo4j/docker-neo4j/blob/master/docker-image-src/4.3/docker-entrypoint.sh

#!/bin/bash -eu

cmd="$1"

function running_as_root
{
    test "$(id -u)" = "0"
}

function secure_mode_enabled
{
    test "${SECURE_FILE_PERMISSIONS:=no}" = "yes"
}

function containsElement
{
  local e match="$1"
  shift
  for e; do [[ "$e" == "$match" ]] && return 0; done
  return 1

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Many thanks for the support.
Regards.