[HTTPCLIENT-2044] Add and reuse singleton instances for immutable factory objects.

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 5.0 Beta7
• External issue URL: https://github.com/apache/httpcomponents-client/pull/195
• Assignee: Gary D. Gregory
• Reporter: Gary D. Gregory
• Created: 31/Dec/19 16:06
• Updated: 01/Jan/20 21:51
• Resolved: 31/Dec/19 19:44

Description

In a lot of places we create instances of AuthSchemeFactory implementations like BasicSchemeFactory.

All of these instances are the same and immutable.

We can simplify the code and put a touch less pressure on the GC by creating singletons for these classes and then reusing them.