30 import java.security.PrivilegedAction;
  31 import java.util.HashMap;
  32 import java.util.Iterator;
  33 import java.util.Map;
  34 import java.util.ResourceBundle;
  35 import java.util.ServiceLoader;
  36 import java.util.function.BooleanSupplier;
  37 import java.util.function.Function;
  38 import java.util.function.Supplier;
  39 import java.lang.System.LoggerFinder;
  40 import java.lang.System.Logger;
  41 import java.lang.System.Logger.Level;
  42 import java.lang.ref.WeakReference;
  43 import java.util.Objects;
  44 import java.util.concurrent.ExecutionException;
  45 import java.util.concurrent.ExecutorService;
  46 import java.util.concurrent.LinkedBlockingQueue;
  47 import java.util.concurrent.ThreadFactory;
  48 import java.util.concurrent.ThreadPoolExecutor;
  49 import java.util.concurrent.TimeUnit;
  50 import sun.misc.InnocuousThread;
  51 import jdk.internal.misc.VM;
  52 import sun.util.logging.PlatformLogger;
  53 import jdk.internal.logger.LazyLoggers.LazyLoggerAccessor;
  54 
  55 /**
  56  * The BootstrapLogger class handles all the logic needed by Lazy Loggers
  57  * to delay the creation of System.Logger instances until the VM is booted.
  58  * By extension - it also contains the logic that will delay the creation
  59  * of JUL Loggers until the LogManager is initialized by the application, in
  60  * the common case where JUL is the default and there is no custom JUL
  61  * configuration.
  62  *
  63  * A BootstrapLogger instance is both a Logger and a
  64  * PlatformLogger.Bridge instance, which will put all Log messages in a queue
  65  * until the VM is booted.
  66  * Once the VM is booted, it obtain the real System.Logger instance from the
  67  * LoggerFinder and flushes the message to the queue.
  68  *
  69  * There are a few caveat:
  70  *  - the queue may not be flush until the next message is logged after

  30 import java.security.PrivilegedAction;
  31 import java.util.HashMap;
  32 import java.util.Iterator;
  33 import java.util.Map;
  34 import java.util.ResourceBundle;
  35 import java.util.ServiceLoader;
  36 import java.util.function.BooleanSupplier;
  37 import java.util.function.Function;
  38 import java.util.function.Supplier;
  39 import java.lang.System.LoggerFinder;
  40 import java.lang.System.Logger;
  41 import java.lang.System.Logger.Level;
  42 import java.lang.ref.WeakReference;
  43 import java.util.Objects;
  44 import java.util.concurrent.ExecutionException;
  45 import java.util.concurrent.ExecutorService;
  46 import java.util.concurrent.LinkedBlockingQueue;
  47 import java.util.concurrent.ThreadFactory;
  48 import java.util.concurrent.ThreadPoolExecutor;
  49 import java.util.concurrent.TimeUnit;
  50 import jdk.internal.misc.InnocuousThread;
  51 import jdk.internal.misc.VM;
  52 import sun.util.logging.PlatformLogger;
  53 import jdk.internal.logger.LazyLoggers.LazyLoggerAccessor;
  54 
  55 /**
  56  * The BootstrapLogger class handles all the logic needed by Lazy Loggers
  57  * to delay the creation of System.Logger instances until the VM is booted.
  58  * By extension - it also contains the logic that will delay the creation
  59  * of JUL Loggers until the LogManager is initialized by the application, in
  60  * the common case where JUL is the default and there is no custom JUL
  61  * configuration.
  62  *
  63  * A BootstrapLogger instance is both a Logger and a
  64  * PlatformLogger.Bridge instance, which will put all Log messages in a queue
  65  * until the VM is booted.
  66  * Once the VM is booted, it obtain the real System.Logger instance from the
  67  * LoggerFinder and flushes the message to the queue.
  68  *
  69  * There are a few caveat:
  70  *  - the queue may not be flush until the next message is logged after