javaOSBean() dedupe

Author: scivision

+stdlib/cpu_load.m

@@ -8,11 +8,7 @@
 
 function L = cpu_load()
 
-if stdlib.isoctave()
-  b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
-else
-  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
-end
+b = javaOSBean();
 
 if stdlib.java_api() < 14
   % https://docs.oracle.com/en/java/javase/21/docs/api/jdk.management/com/sun/management/OperatingSystemMXBean.html#getSystemCpuLoad()

+stdlib/private/javaOSBean.m

@@ -0,0 +1,13 @@
+function b = javaOSBean()
+
+try
+  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
+catch e
+  if strcmp(e.identifier, "Octave:undefined-function")
+    b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
+  else
+    rethrow(e);
+  end
+end
+
+end

+stdlib/ram_free.m

@@ -7,11 +7,7 @@
 
 function freebytes = ram_free()
 
-if stdlib.isoctave()
-  b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
-else
-  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
-end
+b = javaOSBean();
 
 if stdlib.java_api() < 14
   freebytes = b.getFreePhysicalMemorySize();

+stdlib/ram_total.m

@@ -7,11 +7,7 @@
 
 function bytes = ram_total()
 
-if stdlib.isoctave()
-  b = javaMethod("getOperatingSystemMXBean", "java.lang.management.ManagementFactory");
-else
-  b = java.lang.management.ManagementFactory.getOperatingSystemMXBean();
-end
+b = javaOSBean();
 
 if stdlib.java_api() < 14
   bytes = b.getTotalPhysicalMemorySize();