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jmx4perl-0.15_5
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/ JMX::Jmx4Perl::Alias

NAME

JMX::Jmx4Perl::Alias - JMX alias names for jmx4perl

DESCRIPTION

Aliases are shortcuts for certain MBean attributes and operations. Additionally, aliasing provides a thin abstraction layer which allows to map common functionality with different naming schemes across different application servers. E.g you can access the heap memory usage of your application by using the alias MEMORY_HEAP_USED regardless how the specific MBean and its attributes are named on the target application server. Specific JMX::Jmx4Perl::Product take care about this mapping.

Alias are normally named hierachically, from the most general to the most specific, where the parts are separate by underscore (_). I.e. OS_MEMORY_TOTAL_PHYSICAL specifies the total physical memory installed on the machine.

If you use this module, be aware that all aliases are imported in your name space a subroutines (so that you an use them without a $).

Most of the methods in JMX::Jmx4Perl which allows for aliases can take an alias in two forms. Either as a constant import by using this module or as string. The string can be either the name of the alias itself or, as an alternative format, a lower cased variant where underscores are replaced by colons. E.g "MEMORY_HEAP_USED" and "memory:heap:used" are both valid alias names.

Each alias is an object of the package JMX::Jmx4Perl::Alias::Object which provides some additional informations about the alias.

To print out all available aliases, sorted by name and with a short description, you can use the help subroutine, e.g. like in

perl -MJMX::Jmx4Perl::Alias -e 'JMX::Jmx4Perl::Alias::help'

METHODS

$alias = JMX::Jmx4Perl::Alias->by_name("MEMORY_HEAP_USAGE")

Get an alias object by a name lookup. The argument provided must be a string containing the name of an alias. If such an alias is not registered, this method returns undef.

JMX::Jmx4Perl::Alias->all

Get all aliases defined, sorted by alias name.

JMX::Jmx4Perl::Alias::help

Print out all registered aliases along with a short description

ALIASES

The currently aliases are as shown below. Note, that this information might be outdated, to get the current one, use

perl -MJMX::Jmx4Perl::Alias -e 'JMX::Jmx4Perl::Alias::help'

CL_LOADED                      attr Number of currently loaded classes
CL_TOTAL                       attr Number of classes loaded in total
CL_UNLOADED                    attr Number of unloaded classes
MEMORY_GC                      oper Run a garbage collection
MEMORY_HEAP                    attr Heap memory usage, multiple values
MEMORY_HEAP_COMITTED           attr Committed heap memory
MEMORY_HEAP_INIT               attr Initially allocated heap memory
MEMORY_HEAP_USED               attr User heap memory
OS_CPU_TIME                    attr The cpu time used by this process
OS_FILE_MAX_DESC               attr Maximum number of open file descriptors
OS_FILE_OPEN_DESC              attr Number of open file descriptors
OS_INFO_ARCH                   attr Architecture
OS_INFO_NAME                   attr Operating system name
OS_INFO_PROCESSORS             attr Numer of processors
OS_INFO_VERSION                attr Operating system version
OS_MEMORY_FREE_PHYSICAL        attr The amount of free physical memory for the OS
OS_MEMORY_FREE_SWAP            attr The amount of free swap space for the OS
OS_MEMORY_TOTAL_PHYSICAL       attr The amount of total physical memory for the OS
OS_MEMORY_TOTAL_SWAP           attr The amount of total swap memory available
OS_MEMORY_VIRTUAL              attr Size of virtual memory used by this process
RUNTIME_ARGUMENTS              attr Arguments when starting the JVM
RUNTIME_BOOTCLASSPATH          attr Bootclasspath
RUNTIME_CLASSPATH              attr Classpath
RUNTIME_LIBRARY_PATH           attr The LD_LIBRARY_PATH
RUNTIME_NAME                   attr Name of the runtime
RUNTIME_STARTIME               attr Time when starting the JVM
RUNTIME_SYSTEM_PROPERTIES      attr System properties
RUNTIME_UPTIME                 attr Total uptime of JVM
RUNTIME_VM_NAME                attr Name of JVM
RUNTIME_VM_VENDOR              attr JVM Vendor
RUNTIME_VM_VERSION             attr Version of JVM
SERVER_ADDRESS                 attr IP Address of server, numeric
SERVER_HOSTNAME                attr Hostname of server
SERVER_NAME                    attr Name of server software
SERVER_VERSION                 attr Version of application server
THREAD_COUNT                   attr Active threads in the system
THREAD_COUNT_DAEMON            attr Count of threads marked as daemons in the system
THREAD_COUNT_PEAK              attr Peak count of active threads in the system
THREAD_COUNT_STARTED           attr Count of threads started since system start
THREAD_DEADLOCKED              oper Find cycles of threads that are in deadlock waiting to acquire object monitors
THREAD_DUMP                    oper Create a thread dump

LICENSE

This file is part of jmx4perl.

Jmx4perl is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version.

jmx4perl is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with jmx4perl. If not, see <http://www.gnu.org/licenses/>.

A commercial license is available as well. Please contact roland@cpan.org for further details.

PROFESSIONAL SERVICES

Just in case you need professional support for this module (or Nagios or JMX in general), you might want to have a look at http://www.consol.com/opensource/nagios/. Contact roland.huss@consol.de for further information (or use the contact form at http://www.consol.com/contact/)

AUTHOR

roland@cpan.org