Hello everyone,
This is a library I use all the time. My own personal monitoring app is built on it, and it lets me keep an eye on individual running processes and their resources with ease. I personally use this application to monitor CPU and RAM resources for the processes of large bespoke applications that I've developed for clients. I used to rely on another excellent B4J library, but unlike that one, this library does not require administrator privileges.
Oshi Monitor is a lightweight B4J library built on top of the OSHI hardware‑inspection framework. It gives your B4J apps real‑time access to system metrics such as CPU load, RAM usage, CPU temperature (where applicable), and per‑process resource consumption, GPU model and RAM, Battery capacity and usage state, main board model and bios version, sound card and virtual memory, OS name, version and build, plus much more.
The library runs its own background thread, raises regular update events, and includes optional smoothing, maximum value tracking, and multi-process aggregation (useful for apps like Chrome).
You can monitor the whole system or target a specific process by name, with events for CPU, RAM, temperature (where applicable), and process appearance or termination. It also exposes helper methods for listing running processes and retrieving total memory information.
This library is ideal for dashboards, diagnostics tools, performance monitors, or any B4J app that needs live system statistics with minimal overhead.
B4J library tab:
PLEASE NOTE:
To run the attached example, you will NEED to download and install Erel's jGuages library from HERE...
Monitoring all (idle) system resource usage:
Monitoring chrome 3 x 4K tabs resource usage:
Monitoring its own resources usage:
Monitoring B4J resources usage:
Selecting a currently running process:
SS_OshiMonitor
Author: Peter Simpson
Version: 1.1
PLEASE NOTE:
TO RUN THE ATTACHED EXAMPLE, YOU NEED TO DOWNLOAD THE THIRD-PARTY JAVA DEPENDENCIES LINKED BELOW, AS WELL AS USING THE ATTACHED POST LIBRARY.
CLICK HERE - Download Extra Libraries <<<<<<<<<<<<<<<<<<<<<<<<
D = 148 + 132
Enjoy...
This is a library I use all the time. My own personal monitoring app is built on it, and it lets me keep an eye on individual running processes and their resources with ease. I personally use this application to monitor CPU and RAM resources for the processes of large bespoke applications that I've developed for clients. I used to rely on another excellent B4J library, but unlike that one, this library does not require administrator privileges.
Oshi Monitor is a lightweight B4J library built on top of the OSHI hardware‑inspection framework. It gives your B4J apps real‑time access to system metrics such as CPU load, RAM usage, CPU temperature (where applicable), and per‑process resource consumption, GPU model and RAM, Battery capacity and usage state, main board model and bios version, sound card and virtual memory, OS name, version and build, plus much more.
The library runs its own background thread, raises regular update events, and includes optional smoothing, maximum value tracking, and multi-process aggregation (useful for apps like Chrome).
You can monitor the whole system or target a specific process by name, with events for CPU, RAM, temperature (where applicable), and process appearance or termination. It also exposes helper methods for listing running processes and retrieving total memory information.
This library is ideal for dashboards, diagnostics tools, performance monitors, or any B4J app that needs live system statistics with minimal overhead.
B4J library tab:
PLEASE NOTE:
To run the attached example, you will NEED to download and install Erel's jGuages library from HERE...
Monitoring all (idle) system resource usage:
Monitoring chrome 3 x 4K tabs resource usage:
Monitoring its own resources usage:
Monitoring B4J resources usage:
Selecting a currently running process:
SS_OshiMonitor
Author: Peter Simpson
Version: 1.1
- OshiMonitor
OshiMonitor library for B4J.
Uses the OSHI library to monitor CPU, RAM, and Temperature.- Events:
- BatteryCharging (Value As Boolean)
- BatteryWatts (Value As Double)
- CpuTemp (Value As Double)
- CpuUsage (Value As Double)
- ProcessCpuUsage (Value As Double)
- ProcessFound (Name As String)
- ProcessRamUsage (Value As Double)
- ProcessRamUsageMB (Value As Double)
- ProcessTerminated (Name As String)
- RamUsage (Value As Double)
- RamUsageMB (Value As Double)
- Updated (Stats As Map)
- Fields:
- Debug As Boolean
Enables diagnostic logging.
When true internal debug messages are written to the B4J log.
- Debug As Boolean
- Functions:
- GetBatteryCharging As Boolean
Returns true if the battery is currently charging, false otherwise. - GetBatteryCurrentCapacity As Double
Returns the current battery capacity in mAh. - GetBatteryDesignCapacity As Double
Returns the battery design capacity in mAh. - GetBatteryWatts As Double
Returns the current power usage in watts as reported by the battery controller.
Note: When plugged in, this reflects the charge rate; when on battery,
this reflects the total system power draw. - GetBiosVersion As String
Returns the system BIOS or firmware version string. - GetCpuVoltage As Double
Returns the current CPU voltage in volts. - GetCurrentPowerWatts As Double
Returns the current power usage in watts as reported by the battery controller.
Note: When plugged in, this reflects the charge rate; when on battery,
this reflects the total system power draw. - GetDisplays As List
Returns a list containing information about connected displays. - GetDriveLatency (index As Int) As Double
Returns the average I/O latency in milliseconds for a specific drive index.
Latency = (Total Time Spent / Total Operations) - GetFanSpeeds As Int()
Returns an array containing the current speed of each system fan in RPM. - GetGraphicsCards As List
Returns a List containing the name and video memory size of each graphics card. - GetInterfaceTrafficSpeed (index As Int) As Double()
Returns a custom result object (or array) with current traffic speeds
in Bytes per second for a specific interface. - GetLogicalDrives As List
Returns a list containing space and mount point information for logical drives. - GetLogicalProcessorCount As Int
Returns the total number of logical processors (threads). - GetMostActiveInterfaceIndex As Int
Returns the index of the network interface with the highest combined
Traffic (received + sent) since system boot. - GetMotherboardModel As String
Returns the motherboard or baseboard model name. - GetNetworkInDrops (index As Int) As Long
Returns the number of inbound packets dropped for a specific interface index. - GetNetworkInErrors (index As Int) As Long
Returns the number of inbound errors for a specific interface index. - GetNetworkInterfaceNames As java.util.List
Returns a list of names of all network interfaces. - GetNetworkIPv4Addresses As List
Returns a list containing the IPv4 addresses for each active network interface. - GetNetworkIPv6Addresses As List
Returns a list containing the IPv6 addresses for each active network interface. - GetNetworkOutErrors (index As Int) As Long
Returns the number of outbound errors for a specific interface index. - GetOSBuild As String
Returns the exact build number of the current operating system. - GetOSName As String
Returns the full family and description name of the operating system. - GetPhysicalCoreCount As Int
Returns the number of physical CPU cores. - GetProcessDetails (processName As String) As Map
Returns a map containing detailed information about a specific process by its name. - GetProcessorLoad As Double()
Returns an array of CPU load percentages for each individual logical processor. - GetProcessorName As String
Returns the processor name from the system. - GetProcessPeakMemory (processName As String) As Long
Returns the peak resident set size (physical memory) used by a process in bytes. - GetRefreshRate As Int
Returns the current refresh rate of the primary display in Hz.
Returns 0 if the refresh rate is unknown or cannot be determined. - GetSoundCards As List
Returns a list containing the names of active sound cards or audio interfaces. - GetSwapTotal As Long
Returns the total swap file size in bytes. - GetSwapUsed As Long
Returns the currently used swap file size in bytes. - GetSystemModel As String
Returns the physical computer system model name. - GetSystemUptimeHours As Double
Returns the system uptime in hours. - GetSystemUptimeMinutes As Double
Returns the system uptime in minutes. - GetSystemUptimeSeconds As Long
Returns the system uptime in seconds. - GetTotalBytesForInterface (index As Int) As Long
Returns the total bytes (received + sent) for a specific network interface. - GetTotalBytesRead As Long
Returns total bytes read across all disks since system boot. - GetTotalBytesReceived As Long
Returns the number of bytes received across all network interfaces. - GetTotalBytesSent As Long
Returns the number of bytes sent across all network interfaces. - GetTotalBytesWritten As Long
Returns total bytes written across all disks since system boot. - GetTrackedPeakMemory (processName As String) As Long
Returns the highest combined resident set size (physical memory) used by all instances
of a specific process name since the application started monitoring. - GetUsbDevices As List
Returns a list containing the names of connected USB devices. - GetVirtualMemoryTotal As Long
Returns the total virtual memory in bytes. - GetVirtualMemoryUsed As Long
Returns the currently used virtual memory in bytes. - HasCpuTemp As Boolean
Returns true if CPU temperature monitoring is supported. - Initialize (EventName As String)
Initializes the monitor and prepares OSHI hardware access. - IsCharging As Boolean
Checks if the primary battery is currently charging.
Return true if charging, false otherwise. - IsInitialized As Boolean
Returns true if the object has been initialized and not yet killed. - IsLaptopByBattery As Boolean
Returns true if the system appears to be a laptop based on battery presence. - Kill
Kills the ba object reference to free memory and stops the thread cleanly.
After calling this, IsInitialized will return false. - ListProcesses As List
Returns a List of unique running process names, sorted A-Z. - ResetMaximums
Resets the tracked maximum CPU and RAM values for the system to zero. - ResetProcessMaximums
Resets the tracked maximum CPU and RAM values for the target process to zero. - Start
Starts the background monitoring thread.
Raises Updated, CpuUsage, CpuTemp and RamUsage events at the configured interval. - Stop
Stops the monitoring thread.
The object remains initialized and can be restarted with Start.
- GetBatteryCharging As Boolean
- Properties:
- CpuTemp As Double [read only]
Returns CPU temperature in C. - CpuUsage As Double [read only]
Returns CPU usage as a percentage. - IntervalMs As Int [write only]
Sets the update interval in milliseconds.
Values lower than 100ms are clamped to 100ms. - MaxCpuUsage As Double [read only]
Returns the highest CPU usage recorded since start or reset. - MaxProcessCpuUsage As Double [read only]
Returns the highest Process CPU usage recorded since the process was targeted or reset. - MaxProcessRamUsage As Double [read only]
Returns the highest Process RAM usage percentage recorded. - MaxProcessRamUsageMB As Double [read only]
Returns the highest Process RAM usage in megabytes recorded. - MaxRamUsage As Double [read only]
Returns the highest RAM usage percentage recorded since start or reset. - MaxRamUsageMB As Double [read only]
Returns the highest RAM usage in megabytes recorded since start or reset. - PowerUsageWatts As Double [read only]
Gets the current power usage in watts.
Return Watts being used or supplied. - ProcessCpuUsage As Double [read only]
Returns CPU usage for the configured target process as a percentage. - ProcessRamUsage As Double [read only]
Returns RAM usage for the configured target process as a percentage of total system RAM. - ProcessRamUsageMB As Double [read only]
Returns RAM usage for the configured target process in megabytes. - RamTotal As Long [read only]
Returns total physical memory in bytes. - RamTotalGB As Double [read only]
Returns total physical memory in gigabytes. - RamTotalMB As Double [read only]
Returns total physical memory in megabytes. - RamUsage As Double [read only]
Returns RAM usage as a percentage. - RamUsageMB As Double [read only]
Returns used RAM in megabytes. - TargetProcessName As String
Returns the current target process name.
Returns an empty string if no process is configured.
- CpuTemp As Double [read only]
- Events:
PLEASE NOTE:
TO RUN THE ATTACHED EXAMPLE, YOU NEED TO DOWNLOAD THE THIRD-PARTY JAVA DEPENDENCIES LINKED BELOW, AS WELL AS USING THE ATTACHED POST LIBRARY.
CLICK HERE - Download Extra Libraries <<<<<<<<<<<<<<<<<<<<<<<<
D = 148 + 132
Enjoy...
Last edited:
