java - How does Wildfly know that a number of files need to be deleted if the "max-backup-index" attribute has been configured? -


in order implement this issue, i.e., max-backup-index feature periodic-rotating-file-handler trying understand how max-backup-index attribute works in size-rotating-file-handler.

attempts

wildfly reads xml configuration:

<size-rotating-file-handler name="file" autoflush="true">     <level name="info"/>     <formatter>         <pattern-formatter pattern="%d{hh:mm:ss,sss} %-5p [%c] (%t) %s%e%n"/>     </formatter>     <file relative-to="jboss.server.log.dir" path="server.log"/>     <rotate-size value="100k"/>     <max-backup-index value="10"/>     <append value="true"/> </size-rotating-file-handler>

if number of log files greater 10, wildfly remove files until 10 left.

the wildfly code resides on github has been viewed in order understand code responsible reading <max-backup-index value="10"/> snippet , removing superfluous log files.

periodicsizerotatinghandlerresourcedefinition

class periodicsizerotatinghandlerresourcedefinition extends abstractfilehandlerdefinition {      public static final string periodic_size_rotating_file_handler = "periodic-size-rotating-file-handler";     static final pathelement periodic_size_rotating_handler_path = pathelement.pathelement(periodic_size_rotating_file_handler);          static final attributedefinition[] attributes = logging.join(default_attributes, autoflush, append, max_backup_index, rotate_size, rotate_on_boot, suffix, named_formatter, file);      public periodicsizerotatinghandlerresourcedefinition(final resolvepathhandler resolvepathhandler) {         super(periodic_size_rotating_handler_path, false, periodicsizerotatingfilehandler.class, resolvepathhandler, attributes);     }

super refers constructor of superclass, i.e, abstractfilehandlerdefinition

abstract class abstractfilehandlerdefinition extends abstracthandlerdefinition {     protected abstractfilehandlerdefinition(final pathelement path, final boolean registerlegacyops,                                             final class<? extends handler> type,                                             final resolvepathhandler resolvepathhandler,                                             final attributedefinition... attributes) {         super(path, registerlegacyops, type, new defaultpropertysorter(filenamelastcomparator.instance), attributes);         this.registerlegacyops = registerlegacyops;         this.resolvepathhandler = resolvepathhandler;     }

super refers abstracthandlerdefinition 

abstract class abstracthandlerdefinition extends transformerresourcedefinition {      protected abstracthandlerdefinition(final pathelement path,                                         final boolean registerlegacyops,                                         final class<? extends handler> type,                                         final propertysorter propertysorter,                                         final attributedefinition[] attributes) {         this(path, registerlegacyops, type, propertysorter, attributes, null, attributes);     }

current outcome

at moment feels lost in labyrinth. cannot find code explains interaction between max-backup-index attribute , size-rotating-file-handler.

you need @ jboss log manager not wildfly. wildfly delegates log manager. you're looking this.

that said tricky issue. there's not reliable way determine files should deleted. date suffix can best guess isn't great. don't want log rotation delete files you're intentionally trying save.

for example have server.log.2015-01-01 , server.log.2015-01-01.save. how know delete first one? don't want delete second potentially got renamed user.

there's performance consider. don't want block while complex file matching algorithm run. default logging blocking code trying log blocked until rotation complete.


Comments

Post a Comment

Popular posts from this blog

Email notification in google apps script -

https://support.google.com/docs/answer/91588?hl=en i have sheet the cells filled in data pulled via apps script, website. pull in exact same data, not. on old sheets version use able emails when data "changes" different value. new sheets, email when new data pasted cells, though exact same data......and, can't set @ ranges anymore, entire document. there easy way watch cells when data changes, , email myself? this looks lot you're trying do. for checking whether value has changed after edit, this gives necessary information it. hence, know whether new value same 1 or not. implementing "workaround" talked in second link, able compare , send email myself if value changed. initiate onedit trigger goes off onedit function uses these lines after checks in place have passed. var email = "xyz@whatever.com"; mailapp.sendemail(email, "triggermail", "a change has occurred in sheet"); note: sends "notification...
Read more

c++ - Difference between pre and post decrement in recursive function argument -

i have following sample code used pre-decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(--c); cout << c << endl; return; } } this function give output input 4 : dp3 dp2 dp1 dp0 0 1 2 3 but when use post decrement void function(int c) { if(c == 0) { return; } else { cout << "dp" << c << endl; function(c--); cout << c << endl; return; } } output goes in infinite loop dp4 can explain me in detail why happens ? this happens because function(c--) called same value of c , when finishes c decremented. recursively called, hence called same value no chance of return , hit stack overflow error. assume this, int x = 1, y = 0; y = x++ result y == 1 , x == 2. if y = ++x , bot x , y 2.
Read more

javascript - IE11 incompatibility with jQuery's 'readonly'? -

the code i'm running has no issues in firefox, or chrome. user typing 1 textbox, tabs next , can continue typing that. when run webpage on ie11, user tabs next textbox , can't type in. textbox has double-clicked before user can insert anything. i've googled , seems ie give problems when using older jquery (i.e. prefers 'prop' 'attr' ). in code below jquery's readonly keyword being used in way ie11 no longer recognise/accept? i assume issue readonly , removeclass('ignore') working expected. //when focus on textbox 1 $("#field1").focus(function() { //remove readonly property textbox 1 $('#field1').prop('readonly', false).removeclass('ignore'); //add readonly property other textboxes $('#field2, #field3, #field4') .prop('readonly', 'readonly').addclass('ignore').val(''); }); i'm using jquery 2.1.3 ...
Read more