edu.wisc.ssec.mcidasv.util
Class SystemState

java.lang.Object
  edu.wisc.ssec.mcidasv.util.SystemState

public class SystemState
extends Object

Utility methods for querying the state of the user's machine.

Field Summary

private static org.slf4j.Logger

logger Handy logging object.

Constructor Summary

private

SystemState()

Method Summary

static String	escapeWhitespaceChars(CharSequence sequence)
static Map<Integer,Rectangle>	getDisplayBounds() Returns a mapping of display number to a Rectangle that represents the "bounds" of the display.
static String	getIdvVersionString() Gets a human-friendly representation of the information embedded within IDV's build.properties.
static String	getMcvVersionString() Gets a human-friendly representation of the information embedded within McIDAS-V's build.properties.
private InputStream	getResourceAsStream(String name)
static String	getStateAsString(McIDASV mcv) Builds a (filtered) subset of the McIDAS-V system properties and returns the results as a String.
static String	getStateAsString(McIDASV mcv, boolean firehose) Builds the McIDAS-V system properties and returns the results as a String.
static Rectangle	getVirtualDisplayBounds()
private static <T> T	hackyMethodCall(String methodName, T defaultValue) Attempt to invoke OperatingSystemMXBean.methodName via reflection.
static Map<String,String>	queryIdvBuildProperties() Returns a Map of the (currently) most useful contents of ucar/unidata/idv/resources/build.properties.
static Map<String,Object>	queryJava3d() Polls Java 3D for information about its environment.
static Map<Object,Object>	queryJythonProps() Returns the contents of Jython's registry (basically just Jython-specific properties) as well as some of the information from Python's "sys" module.
static Map<String,String>	queryMachine() Polls Java for information about the user's machine.
static Map<String,String>	queryMcvBuildProperties() Returns a Map of the (currently) most useful contents of edu/wisc/ssec/mcidasv/resources/build.properties.
static Map<String,Object>	queryMcvState(McIDASV mcv) Queries McIDAS-V for information about its state.
static Map<String,String>	queryOpSysProps() Attempts to call methods belonging to com.sun.management.OperatingSystemMXBean.

Methods inherited from class java.lang.Object

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

Field Detail

logger

private static final org.slf4j.Logger logger

Handy logging object.

Constructor Detail

SystemState

private SystemState()

Method Detail

escapeWhitespaceChars

public static String escapeWhitespaceChars(CharSequence sequence)

hackyMethodCall

private static <T> T hackyMethodCall(String methodName,
                                     T defaultValue)

Attempt to invoke OperatingSystemMXBean.methodName via reflection.

Type Parameters:

T - Either Long or Double.

Parameters:

methodName - The method to invoke. Must belong to com.sun.management.OperatingSystemMXBean.

defaultValue - Default value to return, must be in "boxed" form.

Returns:

Either the result of the methodName call or defaultValue.

queryJythonProps

public static Map<Object,Object> queryJythonProps()

Returns the contents of Jython's registry (basically just Jython-specific properties) as well as some of the information from Python's "sys" module.

Returns:

Jython's configuration settings.

queryOpSysProps

public static Map<String,String> queryOpSysProps()

Attempts to call methods belonging to com.sun.management.OperatingSystemMXBean. If successful, we'll have the following information:

• opsys.memory.virtual.committed: virtual memory that is guaranteed to be available
• opsys.memory.swap.total: total amount of swap space in bytes
• opsys.memory.swap.free: free swap space in bytes
• opsys.cpu.time: CPU time used by the process (nanoseconds)
• opsys.memory.physical.free: free physical memory in bytes
• opsys.memory.physical.total: physical memory in bytes
• opsys.load: system load average for the last minute

Returns:

Map of properties that contains interesting information about the hardware McIDAS-V is using.

queryMachine

public static Map<String,String> queryMachine()

Polls Java for information about the user's machine. We're specifically after memory statistics, number of processors, and display information.

Returns:

Map of properties that describes the user's machine.

getDisplayBounds

public static Map<Integer,Rectangle> getDisplayBounds()

Returns a mapping of display number to a Rectangle that represents the "bounds" of the display.

Returns:

Rectangles representing the "bounds" of the current display devices.

getVirtualDisplayBounds

public static Rectangle getVirtualDisplayBounds()

queryJava3d

public static Map<String,Object> queryJava3d()

Polls Java 3D for information about its environment. Specifically, we call VirtualUniverse.getProperties() and Canvas3D.queryProperties().

Returns:

As much information as Java 3D can provide.

getIdvVersionString

public static String getIdvVersionString()

Gets a human-friendly representation of the information embedded within IDV's build.properties.

Returns:

String that looks like "IDV version major.minor<b>revision</b> built <b>date</b>". For example: IDV version 2.9u4 built 2011-04-13 14:01 UTC.

getMcvVersionString

public static String getMcvVersionString()

Gets a human-friendly representation of the information embedded within McIDAS-V's build.properties.

Returns:

String that looks like "McIDAS-V version major.minor<b>release</b> built <b>date</b>". For example: McIDAS-V version 1.02beta1 built 2011-04-14 17:36.

getResourceAsStream

private InputStream getResourceAsStream(String name)

queryIdvBuildProperties

public static Map<String,String> queryIdvBuildProperties()

Returns a Map of the (currently) most useful contents of ucar/unidata/idv/resources/build.properties.

Consider the output of getIdvVersionString(); it's built with the the following:

• idv.version.major: currently "2"
• idv.version.minor: currently "9"
• idv.version.revision: currently "u4"}
• idv.build.date: varies pretty frequently, as it's the build timestamp for idv.jar

Returns:

A Map of at least the useful parts of build.properties.

queryMcvBuildProperties

public static Map<String,String> queryMcvBuildProperties()

Returns a Map of the (currently) most useful contents of edu/wisc/ssec/mcidasv/resources/build.properties.

Consider the output of getMcvVersionString(); it's built with the the following:

• mcidasv.version.major: currently "1"
• mcidasv.version.minor: currently "02"
• mcidasv.version.release: currently "beta1"
• mcidasv.build.date: varies pretty frequently, as it's the build timestamp for mcidasv.jar.

Returns:

A Map of at least the useful parts of build.properties.

queryMcvState

public static Map<String,Object> queryMcvState(McIDASV mcv)

Queries McIDAS-V for information about its state. There's not a good way to characterize what we're interested in, so let's leave it at "whatever seems useful".

Returns:

Information about the state of McIDAS-V.

getStateAsString

public static String getStateAsString(McIDASV mcv)

Builds a (filtered) subset of the McIDAS-V system properties and returns the results as a String.

Returns:

The McIDAS-V system properties in the following format: KEY=VALUE\n. This is so we kinda-sorta conform to the standard Properties file format.

See Also:

getStateAsString(edu.wisc.ssec.mcidasv.McIDASV, boolean)

getStateAsString

public static String getStateAsString(McIDASV mcv,
                                      boolean firehose)

Builds the McIDAS-V system properties and returns the results as a String.

Parameters:

firehose - If true, enables "unfiltered" output.

Returns:

The McIDAS-V system properties in the following format: KEY=VALUE\n. This is so we kinda-sorta conform to the standard Properties file format.