[CXF-6009] Monitor contention at org.apache.cxf.transport.http.Headers

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.1
• Fix Version/s: 3.0.2, 3.1
• Component/s: Transports
• Labels: concurrency perfomance
• Estimated Complexity: Unknown
• Assignee: Sergey Beryozkin
• Reporter: Lucas Pouzac
• Created: 18/Sep/14 12:30
• Updated: 16/Feb/15 16:09
• Resolved: 18/Sep/14 13:32

Description

Headers.getHttpDateFormat() indirectly calls TimeZone.getTimeZone("GMT"), which calls into JRE lib method causing monitor contention. See screen shot

Fix by instantiate into static variable.

    private static TimeZone tZone = TimeZone.getTimeZone("GMT");

    public static SimpleDateFormat getHttpDateFormat() {
        SimpleDateFormat dateFormat = 
            new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz", Locale.US);
        dateFormat.setTimeZone(tZone);
        return dateFormat;
    }