java.lang.System.runFinalization()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中java.lang.System.runFinalization()方法的一些代码示例，展示了System.runFinalization()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。System.runFinalization()方法的具体详情如下：
包路径：java.lang.System
类名称：System
方法名：runFinalization

System.runFinalization介绍

[英]Provides a hint to the VM that it would be useful to attempt to perform any outstanding object finalization.
[中]向VM提供一个提示，提示尝试执行任何未完成的对象终结将非常有用。

代码示例

代码示例来源：origin: square/okhttp

  1. /**
  2.   * See FinalizationTester for discussion on how to best trigger GC in tests.
  3.   * https://android.googlesource.com/platform/libcore/+/master/support/src/test/java/libcore/
  4.   * java/lang/ref/FinalizationTester.java
  5.   */
  6.  public static void awaitGarbageCollection() throws Exception {
  7.   Runtime.getRuntime().gc();
  8.   Thread.sleep(100);
  9.   System.runFinalization();
  10.  }
  11. }

代码示例来源：origin: btraceio/btrace

  1. /**
  2.    * Runs the finalization methods of any objects pending finalization.
  3.    * <p>
  4.    * Calling this method suggests that the Java Virtual Machine expend
  5.    * effort toward running the <code>finalize</code> methods of objects
  6.    * that have been found to be discarded but whose <code>finalize</code>
  7.    * methods have not yet been run. When control returns from the
  8.    * method call, the Java Virtual Machine has made a best effort to
  9.    * complete all outstanding finalizations. This method calls
  10.    * Sys.runFinalization() to run finalization.
  11.    */
  12.   public static void runFinalization() {
  13.     java.lang.System.runFinalization();
  14.   }
  15. }

代码示例来源：origin: fengjiachun/Jupiter

  1. public static void runFinalization() {
  2.   System.runFinalization();
  3. }

代码示例来源：origin: fengjiachun/Jupiter

  1. public static void runFinalization() {
  2.   System.runFinalization();
  3. }

代码示例来源：origin: square/leakcanary

  1. @Override public void runGc() {
  2.  // Code taken from AOSP FinalizationTest:
  3.  // https://android.googlesource.com/platform/libcore/+/master/support/src/test/java/libcore/
  4.  // java/lang/ref/FinalizationTester.java
  5.  // System.gc() does not garbage collect every time. Runtime.gc() is
  6.  // more likely to perform a gc.
  7.  Runtime.getRuntime().gc();
  8.  enqueueReferences();
  9.  System.runFinalization();
  10. }

代码示例来源：origin: robovm/robovm

  1. /**
  2.  * This method exists for binary compatibility.  It is equivalent
  3.  * to {@link System#runFinalization}.
  4.  */
  5. @Deprecated
  6. public void runFinalizationSync() {
  7.   System.runFinalization();
  8. }

代码示例来源：origin: thinkaurelius/titan

  1. private static void collectGarbage() {
  2.     try {
  3.       System.gc();
  4.       Thread.sleep(fSLEEP_INTERVAL);
  5.       System.runFinalization();
  6.       Thread.sleep(fSLEEP_INTERVAL);
  7.     } catch (InterruptedException ex) {
  8.       ex.printStackTrace();
  9.     }
  10.   }
  11. }

代码示例来源：origin: JanusGraph/janusgraph

  1. private static void collectGarbage() {
  2.     try {
  3.       System.gc();
  4.       Thread.sleep(fSLEEP_INTERVAL);
  5.       System.runFinalization();
  6.       Thread.sleep(fSLEEP_INTERVAL);
  7.     } catch (InterruptedException ex) {
  8.       ex.printStackTrace();
  9.     }
  10.   }
  11. }

代码示例来源：origin: objectbox/objectbox-java

  1. /** Also retries up to 500ms to improve GC race condition situation. */
  2. private static boolean isFileOpen(String canonicalPath) {
  3.   synchronized (openFiles) {
  4.     int tries = 0;
  5.     while (tries < 5 && openFiles.contains(canonicalPath)) {
  6.       tries++;
  7.       System.gc();
  8.       System.runFinalization();
  9.       System.gc();
  10.       System.runFinalization();
  11.       try {
  12.         openFiles.wait(100);
  13.       } catch (InterruptedException e) {
  14.         // Ignore
  15.       }
  16.     }
  17.     return openFiles.contains(canonicalPath);
  18.   }
  19. }

代码示例来源：origin: google/guava

  1. /**
  2.  * Waits until the given latch has {@linkplain CountDownLatch#countDown counted down} to zero,
  3.  * invoking the garbage collector as necessary to try to ensure that this will happen.
  4.  *
  5.  * @throws RuntimeException if timed out or interrupted while waiting
  6.  */
  7. public static void await(CountDownLatch latch) {
  8.  if (latch.getCount() == 0) {
  9.   return;
  10.  }
  11.  final long timeoutSeconds = timeoutSeconds();
  12.  final long deadline = System.nanoTime() + SECONDS.toNanos(timeoutSeconds);
  13.  do {
  14.   System.runFinalization();
  15.   if (latch.getCount() == 0) {
  16.    return;
  17.   }
  18.   System.gc();
  19.   try {
  20.    if (latch.await(1L, SECONDS)) {
  21.     return;
  22.    }
  23.   } catch (InterruptedException ie) {
  24.    throw new RuntimeException("Unexpected interrupt while waiting for latch", ie);
  25.   }
  26.  } while (System.nanoTime() - deadline < 0);
  27.  throw formatRuntimeException(
  28.    "Latch failed to count down within %d second timeout", timeoutSeconds);
  29. }

代码示例来源：origin: google/guava

  1. final long deadline = System.nanoTime() + SECONDS.toNanos(timeoutSeconds);
  2. do {
  3.  System.runFinalization();
  4.  if (future.isDone()) {
  5.   return;

代码示例来源：origin: google/guava

  1. System.runFinalization();

代码示例来源：origin: Netflix/eureka

  1. public static void gc() {
  2.     System.gc();
  3.     System.runFinalization();
  4.     try {
  5.       Thread.sleep(1000);
  6.     } catch (InterruptedException e) {
  7.       // IGNORE
  8.     }
  9.   }
  10. }

代码示例来源：origin: ehcache/ehcache3

  1. @SuppressFBWarnings("DM_GC")
  2. static boolean tryRecursiveDelete(File file) {
  3.  boolean interrupted = false;
  4.  try {
  5.   for (int i = 0; i < 5; i++) {
  6.    if (recursiveDelete(file) || !isWindows()) {
  7.     return true;
  8.    } else {
  9.     System.gc();
  10.     System.runFinalization();
  11.     try {
  12.      Thread.sleep(50);
  13.     } catch (InterruptedException e) {
  14.      interrupted = true;
  15.     }
  16.    }
  17.   }
  18.  } finally {
  19.   if (interrupted) {
  20.    Thread.currentThread().interrupt();
  21.   }
  22.  }
  23.  return false;
  24. }

代码示例来源：origin: google/guava

  1. /**
  2.  * Waits until the given predicate returns true, invoking the garbage collector as necessary to
  3.  * try to ensure that this will happen.
  4.  *
  5.  * @throws RuntimeException if timed out or interrupted while waiting
  6.  */
  7. public static void awaitDone(FinalizationPredicate predicate) {
  8.  if (predicate.isDone()) {
  9.   return;
  10.  }
  11.  final long timeoutSeconds = timeoutSeconds();
  12.  final long deadline = System.nanoTime() + SECONDS.toNanos(timeoutSeconds);
  13.  do {
  14.   System.runFinalization();
  15.   if (predicate.isDone()) {
  16.    return;
  17.   }
  18.   CountDownLatch done = new CountDownLatch(1);
  19.   createUnreachableLatchFinalizer(done);
  20.   await(done);
  21.   if (predicate.isDone()) {
  22.    return;
  23.   }
  24.  } while (System.nanoTime() - deadline < 0);
  25.  throw formatRuntimeException(
  26.    "Predicate did not become true within %d second timeout", timeoutSeconds);
  27. }

代码示例来源：origin: ben-manes/caffeine

  1. /**
  2.  * Runs all JSR166 unit tests using junit.textui.TestRunner.
  3.  * Optional command line arg provides the number of iterations to
  4.  * repeat running the tests.
  5.  */
  6. public static void main(String[] args) {
  7.   if (useSecurityManager) {
  8.     System.err.println("Setting a permissive security manager");
  9.     Policy.setPolicy(permissivePolicy());
  10.     System.setSecurityManager(new SecurityManager());
  11.   }
  12.   int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]);
  13.   Test s = suite();
  14.   for (int i = 0; i < iters; ++i) {
  15.     junit.textui.TestRunner.run(s);
  16.     System.gc();
  17.     System.runFinalization();
  18.   }
  19.   System.exit(0);
  20. }

代码示例来源：origin: jtablesaw/tablesaw

  1. /**
  2.  * Call GC until no more memory can be freed
  3.  */
  4. public static void restoreJvm() {
  5.   int maxRestoreJvmLoops = 10;
  6.   long memUsedPrev = memoryUsed();
  7.   for (int i = 0; i < maxRestoreJvmLoops; i++) {
  8.     System.runFinalization();
  9.     System.gc();
  10.     long memUsedNow = memoryUsed();
  11.     // break early if have no more finalization and get constant mem used
  12.     if ((ManagementFactory.getMemoryMXBean().getObjectPendingFinalizationCount() == 0) && (memUsedNow
  13.         >= memUsedPrev)) {
  14.       break;
  15.     } else {
  16.       memUsedPrev = memUsedNow;
  17.     }
  18.   }
  19. }

代码示例来源：origin: geoserver/geoserver

  1. protected final void tearDown(SystemTestData testData) throws Exception {
  2.   if (testData.isTestDataAvailable()) {
  3.     onTearDown(testData);
  4.     destroyGeoServer();
  5.     TestHttpClientProvider.endTest();
  6.     // some tests do need a kick on the GC to fully clean up
  7.     if (isMemoryCleanRequired()) {
  8.       System.gc();
  9.       System.runFinalization();
  10.     }
  11.   }
  12. }

代码示例来源：origin: objectbox/objectbox-java

  1. @After
  2. public void tearDown() throws Exception {
  3.   // Collect dangling Cursors and TXs before store closes
  4.   System.gc();
  5.   System.runFinalization();
  6.   if (store != null) {
  7.     try {
  8.       store.close();
  9.       store.deleteAllFiles();
  10.       File[] files = boxStoreDir.listFiles();
  11.       if (files != null) {
  12.         for (File file : files) {
  13.           logError("File was not deleted: " + file.getAbsolutePath());
  14.         }
  15.       }
  16.     } catch (Exception e) {
  17.       logError("Could not clean up test", e);
  18.     }
  19.   }
  20.   deleteAllFiles();
  21. }

代码示例来源：origin: geoserver/geoserver

  1. /** If subclasses overide they *must* call super.tearDown() first. */
  2. @Override
  3. protected void oneTimeTearDown() throws Exception {
  4.   if (getTestData().isTestDataAvailable()) {
  5.     try {
  6.       // dispose WFS XSD schema's - they will otherwise keep geoserver instance alive
  7.       // forever!!
  8.       disposeIfExists(getXSD11());
  9.       disposeIfExists(getXSD10());
  10.       // kill the context
  11.       applicationContext.destroy();
  12.       // kill static caches
  13.       GeoServerExtensionsHelper.init(null);
  14.       // some tests do need a kick on the GC to fully clean up
  15.       if (isMemoryCleanRequired()) {
  16.         System.gc();
  17.         System.runFinalization();
  18.       }
  19.       if (getTestData() != null) {
  20.         getTestData().tearDown();
  21.       }
  22.     } finally {
  23.       applicationContext = null;
  24.       testData = null;
  25.     }
  26.   }
  27. }

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