Question

When a job is created, I want to assign it to the less dense server. How can i check servers’ “JVM / CPU / Memory” at runtime? (I have 4 server)(İt must return a value to me)

Answer 1

You can do this, with no external dependencies, by utilizing system properties and the Java Management API.

These properties are more then enough to determine the VM;

java.vm.specification.version   Java Virtual Machine specification version
java.vm.specification.vendor    Java Virtual Machine specification vendor
java.vm.specification.name  Java Virtual Machine specification name
java.vm.version         Java Virtual Machine implementation version
java.vm.vendor          Java Virtual Machine implementation vendor
java.vm.name            Java Virtual Machine implementation name
java.specification.version  Java Runtime Environment specification version
java.specification.vendor   Java Runtime Environment specification vendor
java.specification.name     Java Runtime Environment specification name

And you can use the following management beans to determine CPU and memory:

ManagementFactory.getMemoryMXBean();
ManagementFactory.getOperatingSystemMXBean();