Add memory and processor metrics to JvmInformation

base/src/main/java/de/staropensource/sosengine/base/data/info/JvmInformation.java

@@ -25,6 +25,7 @@ import de.staropensource.sosengine.base.types.CodePart;
 import org.jetbrains.annotations.NotNull;
 
 import java.lang.management.ManagementFactory;
+import java.lang.management.MemoryUsage;
 import java.util.List;
 
 /**
@@ -117,4 +118,71 @@ public final class JvmInformation {
     public static List<@NotNull String> getArguments() {
         return ManagementFactory.getRuntimeMXBean().getInputArguments();
     }
+
+    /**
+     * Returns the total amount of memory used by the JVM and the running application.
+     * <p>
+     * Note: This is an estimate.
+     *
+     * @return estimated total amount of used memory
+     * @since 1-alpha1
+     */
+    public static long getMemoryTotal() {
+        return Runtime.getRuntime().totalMemory();
+    }
+
+    /**
+     * Returns the maximum amount of memory usable by the running application.
+     *
+     * @return maximum amount of usable memory
+     * @since 1-alpha1
+     */
+    public static long getMemoryMax() {
+        return Runtime.getRuntime().maxMemory();
+    }
+
+    /**
+     * Returns the amount of free memory available to the running application.
+     *
+     * @return amount of free memory
+     * @since 1-alpha1
+     */
+    public static long getMemoryFree() {
+        return Runtime.getRuntime().freeMemory();
+    }
+
+    /**
+     * Returns the memory usage of the heap.
+     *
+     * @return heap usage
+     * @since 1-alpha1
+     */
+    public static MemoryUsage getMemoryHeap() {
+        return ManagementFactory.getMemoryMXBean().getHeapMemoryUsage();
+    }
+
+    /**
+     * Returns the memory usage of the stack.
+     *
+     * @return stack usage
+     * @since 1-alpha1
+     */
+    public static MemoryUsage getMemoryStack() {
+        return ManagementFactory.getMemoryMXBean().getNonHeapMemoryUsage();
+    }
+
+    /**
+     * Returns the amount of processors used by the JVM.
+     * <p>
+     * Note: The amount of processors used may change rapidly.
+     * If your application scales resources based on the output of
+     * this method, consider checking it's output often and scaling
+     * resources accordingly.
+     *
+     * @return amount of available processors
+     * @since 1-alpha1
+     */
+    public static int getAvailableProcessors() {
+        return Runtime.getRuntime().availableProcessors();
+    }
 }