[CSV-182] Allow some printing operations directly from CSVFormat

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.3
• Fix Version/s: 1.4
• Component/s: Printer

Environment

Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T08:41:47-08:00)
Maven home: E:\Java\apache-maven-3.3.9\bin\..
Java version: 1.7.0_79, vendor: Oracle Corporation
Java home: C:\Program Files\Java\jdk1.7.0_79\jre
Default locale: en_US, platform encoding: Cp1252
OS name: "windows 7", version: "6.1", arch: "amd64", family: "windows"

• Assignee: Gary D. Gregory
• Reporter: Gary D. Gregory
• Created: 09/May/16 20:11
• Updated: 11/May/16 21:12
• Resolved: 11/May/16 21:12

Description

Over in Apache Log4j-land, we are working on a GC-free logging epic.

We try hard to generate as few objects as possible. Right now, we create one CSVPrinter per logging event to create a CSV line for that event.

In order to get the best memory profile and performance, this ticket proposes to refactor the CSVPrinter and CSVFormat objects to allow a subset of print operations directly from the CSVFormat object.

I tested this patch with the Log4j Git master and it works.

Issue Links

• is required by: LOG4J2-1385 (GC) CSV layouts should not create a new CSVPrinter for each log event