CODEWITHSUNDEEP
java
James Kevin De Jesus
James Kevin De Jesus

Reputation: 19

Java - Continuous File Logging

I'm trying to create a Java program that when executed, a log file records the end result. I tried this set of codes:

LogManager lm = LogManager.getLogManager();
        Logger logger = Logger.getLogger("NetSuite SQL Log");
        lm.addLogger(logger);
        logger.setLevel(Level.INFO);
        FileHandler fh;
try {
                            fh = new FileHandler("NetSuiteSQL Sync Log.txt");
                            lm.addLogger(logger);
                            logger.setLevel(Level.INFO);
                            fh.setFormatter(new SimpleFormatter());
                            logger.addHandler(fh);
                            logger.log(Level.INFO, "record event");
                            fh.close();
                        } catch (SecurityException e) {
                            e.printStackTrace();
                        } catch (IOException e) {
                            e.printStackTrace();
                        }

and it does record but changes the date and time, like this:

Apr 20, 2015 4:43:38 PM com.netsuite.jdbc.main.Main main
INFO: No new record.

The result I'm hoping for is a log file with all previous and current logs recorded, like this:

 Apr 20, 2015 4:43:38 PM com.netsuite.jdbc.main.Main main
    INFO: No new record.
 Apr 20, 2015 5:04:38 PM com.netsuite.jdbc.main.Main main
    INFO: No new record.

Is there a set of codes that can result this kind of logging?

Upvotes: 0

Views: 464

Answers (2)

Raunak Kathuria
Raunak Kathuria

Reputation: 3225

Change this fh = new FileHandler("NetSuiteSQL Sync Log.txt") to fh = new FileHandler("NetSuiteSQL Sync Log.txt", true)

As per documentation

public FileHandler(String pattern,
           boolean append)

Initialize a FileHandler to write to the given filename, with optional append. FileHandler Document

Upvotes: 1

Dawnkeeper
Dawnkeeper

Reputation: 2877

Most likely you are overwriting the file with each restart of you program.

You might want to switch to an appending FileHandler: 

fh = new FileHandler("NetSuiteSQL Sync Log.txt");

Documentation is Here

Upvotes: 0

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