云快充1.5.0 初始化

jcpp-infrastructure-util/src/main/java/sanbing/jcpp/infrastructure/util/SystemUtil.java

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+/**
+ * 抖音关注：程序员三丙
+ * 知识星球：https://t.zsxq.com/j9b21
+ */
+package sanbing.jcpp.infrastructure.util;
+
+import lombok.extern.slf4j.Slf4j;
+import oshi.SystemInfo;
+import oshi.hardware.GlobalMemory;
+import oshi.hardware.HardwareAbstractionLayer;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.nio.file.FileStore;
+import java.nio.file.Files;
+import java.nio.file.Paths;
+import java.util.Optional;
+
+@Slf4j
+public class SystemUtil {
+
+    private static final HardwareAbstractionLayer HARDWARE;
+
+    static {
+        HARDWARE = new SystemInfo().getHardware();
+    }
+
+    public static Optional<Integer> getMemoryUsage() {
+        try {
+            GlobalMemory memory = HARDWARE.getMemory();
+            long total = memory.getTotal();
+            long available = memory.getAvailable();
+            return Optional.of(toPercent(total - available, total));
+        } catch (Throwable e) {
+            log.debug("Failed to get memory usage!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<Long> getTotalMemory() {
+        try {
+            return Optional.of(HARDWARE.getMemory().getTotal());
+        } catch (Throwable e) {
+            log.debug("Failed to get total memory!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<Integer> getCpuUsage() {
+        try {
+            return Optional.of((int) (HARDWARE.getProcessor().getSystemCpuLoad(1000) * 100.0));
+        } catch (Throwable e) {
+            log.debug("Failed to get cpu usage!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<Integer> getCpuCount() {
+        try {
+            return Optional.of(HARDWARE.getProcessor().getLogicalProcessorCount());
+        } catch (Throwable e) {
+            log.debug("Failed to get total cpu count!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<Integer> getDiscSpaceUsage() {
+        try {
+            FileStore store = Files.getFileStore(Paths.get("/"));
+            long total = store.getTotalSpace();
+            long available = store.getUsableSpace();
+            return Optional.of(toPercent(total - available, total));
+        } catch (Throwable e) {
+            log.debug("Failed to get free disc space!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    public static Optional<Long> getTotalDiscSpace() {
+        try {
+            FileStore store = Files.getFileStore(Paths.get("/"));
+            return Optional.of(store.getTotalSpace());
+        } catch (Throwable e) {
+            log.debug("Failed to get total disc space!!!", e);
+        }
+        return Optional.empty();
+    }
+
+    private static int toPercent(long used, long total) {
+        BigDecimal u = new BigDecimal(used);
+        BigDecimal t = new BigDecimal(total);
+        BigDecimal i = new BigDecimal(100);
+        return u.multiply(i).divide(t, RoundingMode.HALF_UP).intValue();
+    }
+}