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daml/ledger/ledger-on-memory
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Gary Verhaegen ea55ea2d14
Further copyright updates (#12249) 
Somewhat error-prone, so please review carefully.

Reasons we need this:

- Some file types are not properly handled by the script.
- The only exclusion mechanism we currently have (`NO_AUTO_COPYRIGHT`)
  is overly coarse.

CHANGELOG_BEGIN
CHANGELOG_END
2022-01-04 16:32:17 +01:00
..
src Further copyright updates (#12249) 2022-01-04 16:32:17 +01:00
BUILD.bazel update copyright headers (#12240) 2022-01-03 16:36:51 +00:00
README.md Delete the Docker image targets. (#7932) 2020-11-11 07:40:06 +00:00

README.md

Overview

This document is to help internal engineers work with ledger-on-memory.

ledger-on-memory is a key/value-based ledger that uses a simple in-memory map as an underlying storage. It uses either H2 or PostgreSQL as its index database.

Ledger On Memory

To build a fat JAR with the server built from HEAD run

bazel build //ledger/ledger-on-memory:app_deploy.jar

The application can be run from command line with the following command:

java -Xmx4G -XX:+UseG1GC -jar bazel-bin/ledger/ledger-on-memory/app_deploy.jar --participant participant-id=foo,port=6861

As run from the main project root directory (adjust the location of the JAR according to your working directory).

Alternatively, the application can be run using the Bazel command:

bazel run //ledger/ledger-on-memory:app -- --participant participant-id=foo,port=6861

Creating ledger exports

Ledger On Memory can be used to generate ledger exports through an environment variable:

export KVUTILS_LEDGER_EXPORT=/path/to/export/file

Then launch the ledger using the Bazel or Java command as described above.