org.jppf.management
Class JPPFSystemInformation

java.lang.Object
  org.jppf.management.JPPFSystemInformation

All Implemented Interfaces:

Serializable

public class JPPFSystemInformation
extends Object
implements Serializable

This class encapsulates the system information for a node.
It includes:

• System properties, including -D flags
• Runtime information such as available processors and memory usage
• Environment variables
• JPPF configuration properties
• IPV4 and IPV6 addresses assigned to the JVM host
• Disk space information (JDK 1.6 or later only)

Author:

Laurent Cohen

See Also:

Serialized Form

Nested Class Summary

static class

JPPFSystemInformation.HostIP Instances of this class represent a hostname / ip address pair.

Constructor Summary

JPPFSystemInformation(String uuid)
Initialize this system information object with the specified uuid.

Method Summary

TypedProperties	getEnv() Get the map holding the environment variables.
TypedProperties	getJppf() Get the map holding the JPPF configuration properties.
TypedProperties	getNetwork() Get the map of the network configuration.
TypedProperties[]	getPropertiesArray() Get all the proeprties as an array.
TypedProperties	getRuntime() Get the map holding the runtime information.
TypedProperties	getStorage() Get the map holding the host storage information.
TypedProperties	getSystem() Get the map holding the system properties.
TypedProperties	getUuid() Get the properties object holding the uuid.
void	populate() Populate this node information object.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

JPPFSystemInformation

public JPPFSystemInformation(String uuid)

Initialize this system information object with the specified uuid.

Parameters:

uuid - the uuid of the corresponding JPPF component.

Method Detail

getSystem

public TypedProperties getSystem()

Get the map holding the system properties.

Returns:

a TypedProperties instance.

See Also:

SystemUtils.getSystemProperties()

getRuntime

public TypedProperties getRuntime()

Get the map holding the runtime information.

The resulting map will contain the following properties:

• availableProcessors = number of processors available to the JVM
• freeMemory = current free heap size in bytes
• totalMemory = current total heap size in bytes
• maxMemory = maximum heap size in bytes (i.e. as specified by -Xmx JVM option)

Some or all of these properties may be missing if a security manager is installed that does not grant access to the related Runtime APIs.

Returns:

a TypedProperties instance.

See Also:

SystemUtils.getRuntimeInformation()

getEnv

public TypedProperties getEnv()

Get the map holding the environment variables.

Returns:

a TypedProperties instance.

See Also:

SystemUtils.getEnvironment()

getNetwork

public TypedProperties getNetwork()

Get the map of the network configuration.

The resulting map will contain the following properties:

• ipv4.addresses = hostname_1|ipv4_address_1 ... hostname_n|ipv4_address_n
• ipv6.addresses = hostname_1|ipv6_address_1 ... hostname_p|ipv6_address_p

Each property is a space-separated list of hostname|ip_address pairs, the hostname and ip address being separated by a pipe symbol "|".

Returns:

a TypedProperties instance.

See Also:

SystemUtils.getNetwork()

getJppf

public TypedProperties getJppf()

Get the map holding the JPPF configuration properties.

Returns:

a TypedProperties instance.

See Also:

JPPFConfiguration

getStorage

public TypedProperties getStorage()

Get the map holding the host storage information.

The map will contain the following information:

• host.roots.names = root_name_0 ... root_name_n-1 : the names of all accessible file system roots
• host.roots.number = n : the number of accessible file system roots
• For each root i:
• root.i.name = root_name : for instance "C:\" on Windows or "/" on Unix
• root.i.space.free = space_in_bytes : current free space for the root
• root.i.space.total = space_in_bytes : total space for the root
• root.i.space.usable = space_in_bytes : space available to the user the JVM is running under

If the JVM version is prior to 1.6, the space information will not be available.

Returns:

a TypedProperties instance.

See Also:

SystemUtils.getStorageInformation()

populate

public void populate()

Populate this node information object.

getUuid

public TypedProperties getUuid()

Get the properties object holding the uuid.

Returns:

a TypedProperties wrapper for the uuid of the corresponding JPPF component.

getPropertiesArray

public TypedProperties[] getPropertiesArray()

Get all the proeprties as an array.

Returns:

an array of all the sets of properties.